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/*
* Generic Dynamic compiler generator
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*
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* Copyright ( c ) 2003 Fabrice Bellard
*
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* The COFF object format support was extracted from Kazu ' s QEMU port
* to Win32 .
*
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* Mach - O Support by Matt Reda and Pierre d ' Herbemont
*
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* This program is free software ; you can redistribute it and / or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation ; either version 2 of the License , or
* ( at your option ) any later version .
*
* This program is distributed in the hope that it will be useful ,
* but WITHOUT ANY WARRANTY ; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE . See the
* GNU General Public License for more details .
*
* You should have received a copy of the GNU General Public License
* along with this program ; if not , write to the Free Software
* Foundation , Inc ., 675 Mass Ave , Cambridge , MA 0213 9 , USA .
*/
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# include < stdlib . h >
# include < stdio . h >
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# include < string . h >
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# include < stdarg . h >
# include < inttypes . h >
# include < unistd . h >
# include < fcntl . h >
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# include "config-host.h"
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/* NOTE : we test CONFIG_WIN32 instead of _WIN32 to enabled cross
compilation */
# if defined ( CONFIG_WIN32 )
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# define CONFIG_FORMAT_COFF
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# elif defined ( CONFIG_DARWIN )
# define CONFIG_FORMAT_MACH
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# else
# define CONFIG_FORMAT_ELF
# endif
# ifdef CONFIG_FORMAT_ELF
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/* elf format definitions . We use these macros to test the CPU to
allow cross compilation ( this tool must be ran on the build
platform ) */
# if defined ( HOST_I386 )
# define ELF_CLASS ELFCLASS32
# define ELF_ARCH EM_386
# define elf_check_arch ( x ) ( (( x ) == EM_386 ) || (( x ) == EM_486 ) )
# undef ELF_USES_RELOCA
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# elif defined ( HOST_X86_64 )
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# define ELF_CLASS ELFCLASS64
# define ELF_ARCH EM_X86_64
# define elf_check_arch ( x ) (( x ) == EM_X86_64 )
# define ELF_USES_RELOCA
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# elif defined ( HOST_PPC )
# define ELF_CLASS ELFCLASS32
# define ELF_ARCH EM_PPC
# define elf_check_arch ( x ) (( x ) == EM_PPC )
# define ELF_USES_RELOCA
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# elif defined ( HOST_PPC64 )
# define ELF_CLASS ELFCLASS64
# define ELF_ARCH EM_PPC64
# define elf_check_arch ( x ) (( x ) == EM_PPC64 )
# define ELF_USES_RELOCA
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# elif defined ( HOST_S390 )
# define ELF_CLASS ELFCLASS32
# define ELF_ARCH EM_S390
# define elf_check_arch ( x ) (( x ) == EM_S390 )
# define ELF_USES_RELOCA
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# elif defined ( HOST_ALPHA )
# define ELF_CLASS ELFCLASS64
# define ELF_ARCH EM_ALPHA
# define elf_check_arch ( x ) (( x ) == EM_ALPHA )
# define ELF_USES_RELOCA
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# elif defined ( HOST_IA64 )
# define ELF_CLASS ELFCLASS64
# define ELF_ARCH EM_IA_64
# define elf_check_arch ( x ) (( x ) == EM_IA_64 )
# define ELF_USES_RELOCA
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# elif defined ( HOST_SPARC )
# define ELF_CLASS ELFCLASS32
# define ELF_ARCH EM_SPARC
# define elf_check_arch ( x ) (( x ) == EM_SPARC || ( x ) == EM_SPARC32PLUS )
# define ELF_USES_RELOCA
# elif defined ( HOST_SPARC64 )
# define ELF_CLASS ELFCLASS64
# define ELF_ARCH EM_SPARCV9
# define elf_check_arch ( x ) (( x ) == EM_SPARCV9 )
# define ELF_USES_RELOCA
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# elif defined ( HOST_ARM )
# define ELF_CLASS ELFCLASS32
# define ELF_ARCH EM_ARM
# define elf_check_arch ( x ) (( x ) == EM_ARM )
# define ELF_USES_RELOC
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# elif defined ( HOST_M68K )
# define ELF_CLASS ELFCLASS32
# define ELF_ARCH EM_68K
# define elf_check_arch ( x ) (( x ) == EM_68K )
# define ELF_USES_RELOCA
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# elif defined ( HOST_HPPA )
# define ELF_CLASS ELFCLASS32
# define ELF_ARCH EM_PARISC
# define elf_check_arch ( x ) (( x ) == EM_PARISC )
# define ELF_USES_RELOCA
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# elif defined ( HOST_MIPS )
# define ELF_CLASS ELFCLASS32
# define ELF_ARCH EM_MIPS
# define elf_check_arch ( x ) (( x ) == EM_MIPS )
# define ELF_USES_RELOC
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# elif defined ( HOST_MIPS64 )
/* Assume n32 ABI here, which is ELF32. */
# define ELF_CLASS ELFCLASS32
# define ELF_ARCH EM_MIPS
# define elf_check_arch ( x ) (( x ) == EM_MIPS )
# define ELF_USES_RELOCA
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# else
# error unsupported CPU - please update the code
# endif
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# include "elf.h"
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# if ELF_CLASS == ELFCLASS32
typedef int32_t host_long ;
typedef uint32_t host_ulong ;
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# define swabls ( x ) swab32s ( x )
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# define swablss ( x ) swab32ss ( x )
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# else
typedef int64_t host_long ;
typedef uint64_t host_ulong ;
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# define swabls ( x ) swab64s ( x )
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# define swablss ( x ) swab64ss ( x )
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# endif
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# ifdef ELF_USES_RELOCA
# define SHT_RELOC SHT_RELA
# else
# define SHT_RELOC SHT_REL
# endif
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# define EXE_RELOC ELF_RELOC
# define EXE_SYM ElfW ( Sym )
# endif /* CONFIG_FORMAT_ELF */
# ifdef CONFIG_FORMAT_COFF
typedef int32_t host_long ;
typedef uint32_t host_ulong ;
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# include "a.out.h"
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# define FILENAMELEN 256
typedef struct coff_sym {
struct external_syment * st_syment ;
char st_name [ FILENAMELEN ];
uint32_t st_value ;
int st_size ;
uint8_t st_type ;
uint8_t st_shndx ;
} coff_Sym ;
typedef struct coff_rel {
struct external_reloc * r_reloc ;
int r_offset ;
uint8_t r_type ;
} coff_Rel ;
# define EXE_RELOC struct coff_rel
# define EXE_SYM struct coff_sym
# endif /* CONFIG_FORMAT_COFF */
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# ifdef CONFIG_FORMAT_MACH
# include < mach - o / loader . h >
# include < mach - o / nlist . h >
# include < mach - o / reloc . h >
# include < mach - o / ppc / reloc . h >
# define check_mach_header ( x ) ( x . magic == MH_MAGIC )
typedef int32_t host_long ;
typedef uint32_t host_ulong ;
struct nlist_extended
{
union {
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char * n_name ;
long n_strx ;
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} n_un ;
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unsigned char n_type ;
unsigned char n_sect ;
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short st_desc ;
unsigned long st_value ;
unsigned long st_size ;
};
# define EXE_RELOC struct relocation_info
# define EXE_SYM struct nlist_extended
# endif /* CONFIG_FORMAT_MACH */
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# include "bswap.h"
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enum {
OUT_GEN_OP ,
OUT_CODE ,
OUT_INDEX_OP ,
};
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/* all dynamically generated functions begin with this code */
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# define OP_PREFIX "op_"
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int do_swap ;
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static void __attribute__ (( noreturn )) __attribute__ (( format ( printf , 1 , 2 ))) error ( const char * fmt , ...)
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{
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va_list ap ;
va_start ( ap , fmt );
fprintf ( stderr , "dyngen: " );
vfprintf ( stderr , fmt , ap );
fprintf ( stderr , " \n " );
va_end ( ap );
exit ( 1 );
}
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static void * load_data ( int fd , long offset , unsigned int size )
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{
char * data ;
data = malloc ( size );
if ( ! data )
return NULL ;
lseek ( fd , offset , SEEK_SET );
if ( read ( fd , data , size ) != size ) {
free ( data );
return NULL ;
}
return data ;
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}
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static int strstart ( const char * str , const char * val , const char ** ptr )
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{
const char * p , * q ;
p = str ;
q = val ;
while ( * q != '\0' ) {
if ( * p != * q )
return 0 ;
p ++ ;
q ++ ;
}
if ( ptr )
* ptr = p ;
return 1 ;
}
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static void pstrcpy ( char * buf , int buf_size , const char * str )
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{
int c ;
char * q = buf ;
if ( buf_size <= 0 )
return ;
for (;;) {
c = * str ++ ;
if ( c == 0 || q >= buf + buf_size - 1 )
break ;
* q ++ = c ;
}
* q = '\0' ;
}
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static void swab16s ( uint16_t * p )
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{
* p = bswap16 ( * p );
}
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static void swab32s ( uint32_t * p )
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{
* p = bswap32 ( * p );
}
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static void swab32ss ( int32_t * p )
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{
* p = bswap32 ( * p );
}
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static void swab64s ( uint64_t * p )
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{
* p = bswap64 ( * p );
}
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static void swab64ss ( int64_t * p )
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{
* p = bswap64 ( * p );
}
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static uint16_t get16 ( uint16_t * p )
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{
uint16_t val ;
val = * p ;
if ( do_swap )
val = bswap16 ( val );
return val ;
}
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static uint32_t get32 ( uint32_t * p )
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{
uint32_t val ;
val = * p ;
if ( do_swap )
val = bswap32 ( val );
return val ;
}
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static void put16 ( uint16_t * p , uint16_t val )
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{
if ( do_swap )
val = bswap16 ( val );
* p = val ;
}
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static void put32 ( uint32_t * p , uint32_t val )
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{
if ( do_swap )
val = bswap32 ( val );
* p = val ;
}
/* executable information */
EXE_SYM * symtab ;
int nb_syms ;
int text_shndx ;
uint8_t * text ;
EXE_RELOC * relocs ;
int nb_relocs ;
# ifdef CONFIG_FORMAT_ELF
/* ELF file info */
struct elf_shdr * shdr ;
uint8_t ** sdata ;
struct elfhdr ehdr ;
char * strtab ;
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static int elf_must_swap ( struct elfhdr * h )
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{
union {
uint32_t i ;
uint8_t b [ 4 ];
} swaptest ;
swaptest . i = 1 ;
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return ( h -> e_ident [ EI_DATA ] == ELFDATA2MSB ) !=
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( swaptest . b [ 0 ] == 0 );
}
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static void elf_swap_ehdr ( struct elfhdr * h )
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{
swab16s ( & h -> e_type ); /* Object file type */
swab16s ( & h -> e_machine ); /* Architecture */
swab32s ( & h -> e_version ); /* Object file version */
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swabls ( & h -> e_entry ); /* Entry point virtual address */
swabls ( & h -> e_phoff ); /* Program header table file offset */
swabls ( & h -> e_shoff ); /* Section header table file offset */
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swab32s ( & h -> e_flags ); /* Processor-specific flags */
swab16s ( & h -> e_ehsize ); /* ELF header size in bytes */
swab16s ( & h -> e_phentsize ); /* Program header table entry size */
swab16s ( & h -> e_phnum ); /* Program header table entry count */
swab16s ( & h -> e_shentsize ); /* Section header table entry size */
swab16s ( & h -> e_shnum ); /* Section header table entry count */
swab16s ( & h -> e_shstrndx ); /* Section header string table index */
}
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static void elf_swap_shdr ( struct elf_shdr * h )
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{
swab32s ( & h -> sh_name ); /* Section name (string tbl index) */
swab32s ( & h -> sh_type ); /* Section type */
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swabls ( & h -> sh_flags ); /* Section flags */
swabls ( & h -> sh_addr ); /* Section virtual addr at execution */
swabls ( & h -> sh_offset ); /* Section file offset */
swabls ( & h -> sh_size ); /* Section size in bytes */
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swab32s ( & h -> sh_link ); /* Link to another section */
swab32s ( & h -> sh_info ); /* Additional section information */
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swabls ( & h -> sh_addralign ); /* Section alignment */
swabls ( & h -> sh_entsize ); /* Entry size if section holds table */
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}
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static void elf_swap_phdr ( struct elf_phdr * h )
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{
swab32s ( & h -> p_type ); /* Segment type */
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swabls ( & h -> p_offset ); /* Segment file offset */
swabls ( & h -> p_vaddr ); /* Segment virtual address */
swabls ( & h -> p_paddr ); /* Segment physical address */
swabls ( & h -> p_filesz ); /* Segment size in file */
swabls ( & h -> p_memsz ); /* Segment size in memory */
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swab32s ( & h -> p_flags ); /* Segment flags */
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swabls ( & h -> p_align ); /* Segment alignment */
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}
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static void elf_swap_rel ( ELF_RELOC * rel )
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{
swabls ( & rel -> r_offset );
swabls ( & rel -> r_info );
# ifdef ELF_USES_RELOCA
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swablss ( & rel -> r_addend );
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# endif
}
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static struct elf_shdr * find_elf_section ( struct elf_shdr * shdr , int shnum ,
const char * shstr , const char * name )
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{
int i ;
const char * shname ;
struct elf_shdr * sec ;
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for ( i = 0 ; i < shnum ; i ++ ) {
sec = & shdr [ i ];
if ( ! sec -> sh_name )
continue ;
shname = shstr + sec -> sh_name ;
if ( ! strcmp ( shname , name ))
return sec ;
}
return NULL ;
}
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static int find_reloc ( int sh_index )
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{
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struct elf_shdr * sec ;
int i ;
for ( i = 0 ; i < ehdr . e_shnum ; i ++ ) {
sec = & shdr [ i ];
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if ( sec -> sh_type == SHT_RELOC && sec -> sh_info == sh_index )
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return i ;
}
return 0 ;
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}
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static host_ulong get_rel_offset ( EXE_RELOC * rel )
{
return rel -> r_offset ;
}
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static char * get_rel_sym_name ( EXE_RELOC * rel )
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{
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return strtab + symtab [ ELFW ( R_SYM )( rel -> r_info )]. st_name ;
}
static char * get_sym_name ( EXE_SYM * sym )
{
return strtab + sym -> st_name ;
}
/* load an elf object file */
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static int load_object ( const char * filename )
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{
int fd ;
struct elf_shdr * sec , * symtab_sec , * strtab_sec , * text_sec ;
int i , j ;
ElfW ( Sym ) * sym ;
char * shstr ;
ELF_RELOC * rel ;
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fd = open ( filename , O_RDONLY );
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if ( fd < 0 )
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error ( "can't open file '%s'" , filename );
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/* Read ELF header. */
if ( read ( fd , & ehdr , sizeof ( ehdr )) != sizeof ( ehdr ))
error ( "unable to read file header" );
/* Check ELF identification. */
if ( ehdr . e_ident [ EI_MAG0 ] != ELFMAG0
|| ehdr . e_ident [ EI_MAG1 ] != ELFMAG1
|| ehdr . e_ident [ EI_MAG2 ] != ELFMAG2
|| ehdr . e_ident [ EI_MAG3 ] != ELFMAG3
|| ehdr . e_ident [ EI_VERSION ] != EV_CURRENT ) {
error ( "bad ELF header" );
}
do_swap = elf_must_swap ( & ehdr );
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if ( do_swap )
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elf_swap_ehdr ( & ehdr );
if ( ehdr . e_ident [ EI_CLASS ] != ELF_CLASS )
error ( "Unsupported ELF class" );
if ( ehdr . e_type != ET_REL )
error ( "ELF object file expected" );
if ( ehdr . e_version != EV_CURRENT )
error ( "Invalid ELF version" );
if ( ! elf_check_arch ( ehdr . e_machine ))
error ( "Unsupported CPU (e_machine=%d)" , ehdr . e_machine );
/* read section headers */
shdr = load_data ( fd , ehdr . e_shoff , ehdr . e_shnum * sizeof ( struct elf_shdr ));
if ( do_swap ) {
for ( i = 0 ; i < ehdr . e_shnum ; i ++ ) {
elf_swap_shdr ( & shdr [ i ]);
}
}
/* read all section data */
sdata = malloc ( sizeof ( void * ) * ehdr . e_shnum );
memset ( sdata , 0 , sizeof ( void * ) * ehdr . e_shnum );
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for ( i = 0 ; i < ehdr . e_shnum ; i ++ ) {
sec = & shdr [ i ];
if ( sec -> sh_type != SHT_NOBITS )
sdata [ i ] = load_data ( fd , sec -> sh_offset , sec -> sh_size );
}
sec = & shdr [ ehdr . e_shstrndx ];
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shstr = ( char * ) sdata [ ehdr . e_shstrndx ];
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/* swap relocations */
for ( i = 0 ; i < ehdr . e_shnum ; i ++ ) {
sec = & shdr [ i ];
if ( sec -> sh_type == SHT_RELOC ) {
nb_relocs = sec -> sh_size / sec -> sh_entsize ;
if ( do_swap ) {
for ( j = 0 , rel = ( ELF_RELOC * ) sdata [ i ]; j < nb_relocs ; j ++ , rel ++ )
elf_swap_rel ( rel );
}
}
}
/* text section */
text_sec = find_elf_section ( shdr , ehdr . e_shnum , shstr , ".text" );
if ( ! text_sec )
error ( "could not find .text section" );
text_shndx = text_sec - shdr ;
text = sdata [ text_shndx ];
/* find text relocations, if any */
relocs = NULL ;
nb_relocs = 0 ;
i = find_reloc ( text_shndx );
if ( i != 0 ) {
relocs = ( ELF_RELOC * ) sdata [ i ];
nb_relocs = shdr [ i ]. sh_size / shdr [ i ]. sh_entsize ;
}
symtab_sec = find_elf_section ( shdr , ehdr . e_shnum , shstr , ".symtab" );
if ( ! symtab_sec )
error ( "could not find .symtab section" );
strtab_sec = & shdr [ symtab_sec -> sh_link ];
symtab = ( ElfW ( Sym ) * ) sdata [ symtab_sec - shdr ];
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strtab = ( char * ) sdata [ symtab_sec -> sh_link ];
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nb_syms = symtab_sec -> sh_size / sizeof ( ElfW ( Sym ));
if ( do_swap ) {
for ( i = 0 , sym = symtab ; i < nb_syms ; i ++ , sym ++ ) {
swab32s ( & sym -> st_name );
swabls ( & sym -> st_value );
swabls ( & sym -> st_size );
swab16s ( & sym -> st_shndx );
}
}
close ( fd );
return 0 ;
}
# endif /* CONFIG_FORMAT_ELF */
# ifdef CONFIG_FORMAT_COFF
/* COFF file info */
struct external_scnhdr * shdr ;
uint8_t ** sdata ;
struct external_filehdr fhdr ;
struct external_syment * coff_symtab ;
char * strtab ;
int coff_text_shndx , coff_data_shndx ;
int data_shndx ;
# define STRTAB_SIZE 4
# define DIR32 0x06
# define DISP32 0x14
# define T_FUNCTION 0x20
# define C_EXTERNAL 2
void sym_ent_name ( struct external_syment * ext_sym , EXE_SYM * sym )
{
char * q ;
int c , i , len ;
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632
633
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635
636
637
638
639
640
641
642
643
644
645
if ( ext_sym -> e . e . e_zeroes != 0 ) {
q = sym -> st_name ;
for ( i = 0 ; i < 8 ; i ++ ) {
c = ext_sym -> e . e_name [ i ];
if ( c == '\0' )
break ;
* q ++ = c ;
}
* q = '\0' ;
} else {
pstrcpy ( sym -> st_name , sizeof ( sym -> st_name ), strtab + ext_sym -> e . e . e_offset );
}
/* now convert the name to a C name (suppress the leading '_') */
if ( sym -> st_name [ 0 ] == '_' ) {
len = strlen ( sym -> st_name );
memmove ( sym -> st_name , sym -> st_name + 1 , len - 1 );
sym -> st_name [ len - 1 ] = '\0' ;
}
646
647
}
648
char * name_for_dotdata ( struct coff_rel * rel )
649
{
650
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652
653
654
655
656
657
658
659
int i ;
struct coff_sym * sym ;
uint32_t text_data ;
text_data = * ( uint32_t * )( text + rel -> r_offset );
for ( i = 0 , sym = symtab ; i < nb_syms ; i ++ , sym ++ ) {
if ( sym -> st_syment -> e_scnum == data_shndx &&
text_data >= sym -> st_value &&
text_data < sym -> st_value + sym -> st_size ) {
ths
authored
18 years ago
660
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662
663
664
665
return sym -> st_name ;
}
}
return NULL ;
666
667
}
668
static char * get_sym_name ( EXE_SYM * sym )
669
{
670
return sym -> st_name ;
671
672
}
673
static char * get_rel_sym_name ( EXE_RELOC * rel )
674
{
675
676
677
678
char * name ;
name = get_sym_name ( symtab + * ( uint32_t * )( rel -> r_reloc -> r_symndx ));
if ( ! strcmp ( name , ".data" ))
name = name_for_dotdata ( rel );
679
680
if ( name [ 0 ] == '.' )
return NULL ;
681
return name ;
682
683
}
684
685
686
687
688
static host_ulong get_rel_offset ( EXE_RELOC * rel )
{
return rel -> r_offset ;
}
689
struct external_scnhdr * find_coff_section ( struct external_scnhdr * shdr , int shnum , const char * name )
690
691
692
{
int i ;
const char * shname ;
693
struct external_scnhdr * sec ;
694
695
696
for ( i = 0 ; i < shnum ; i ++ ) {
sec = & shdr [ i ];
697
if ( ! sec -> s_name )
698
continue ;
699
shname = sec -> s_name ;
700
701
702
703
704
705
if ( ! strcmp ( shname , name ))
return sec ;
}
return NULL ;
}
706
707
/* load a coff object file */
int load_object ( const char * filename )
708
{
709
710
int fd ;
struct external_scnhdr * sec , * text_sec , * data_sec ;
711
int i ;
712
713
714
715
716
717
struct external_syment * ext_sym ;
struct external_reloc * coff_relocs ;
struct external_reloc * ext_rel ;
uint32_t * n_strtab ;
EXE_SYM * sym ;
EXE_RELOC * rel ;
718
719
const char * p ;
int aux_size , j ;
ths
authored
18 years ago
720
721
fd = open ( filename , O_RDONLY
722
723
724
725
# ifdef _WIN32
| O_BINARY
# endif
);
ths
authored
18 years ago
726
if ( fd < 0 )
727
error ( "can't open file '%s'" , filename );
ths
authored
18 years ago
728
729
730
731
/* Read COFF header. */
if ( read ( fd , & fhdr , sizeof ( fhdr )) != sizeof ( fhdr ))
error ( "unable to read file header" );
732
733
734
735
736
737
738
739
740
/* Check COFF identification. */
if ( fhdr . f_magic != I386MAGIC ) {
error ( "bad COFF header" );
}
do_swap = 0 ;
/* read section headers */
shdr = load_data ( fd , sizeof ( struct external_filehdr ) + fhdr . f_opthdr , fhdr . f_nscns * sizeof ( struct external_scnhdr ));
ths
authored
18 years ago
741
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744
/* read all section data */
sdata = malloc ( sizeof ( void * ) * fhdr . f_nscns );
memset ( sdata , 0 , sizeof ( void * ) * fhdr . f_nscns );
ths
authored
18 years ago
745
746
for ( i = 0 ; i < fhdr . f_nscns ; i ++ ) {
747
sec = & shdr [ i ];
748
749
if ( ! strstart ( sec -> s_name , ".bss" , & p ))
sdata [ i ] = load_data ( fd , sec -> s_scnptr , sec -> s_size );
750
751
}
752
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754
755
756
757
758
759
760
761
762
763
764
/* text section */
text_sec = find_coff_section ( shdr , fhdr . f_nscns , ".text" );
if ( ! text_sec )
error ( "could not find .text section" );
coff_text_shndx = text_sec - shdr ;
text = sdata [ coff_text_shndx ];
/* data section */
data_sec = find_coff_section ( shdr , fhdr . f_nscns , ".data" );
if ( ! data_sec )
error ( "could not find .data section" );
coff_data_shndx = data_sec - shdr ;
ths
authored
18 years ago
765
766
767
768
769
770
coff_symtab = load_data ( fd , fhdr . f_symptr , fhdr . f_nsyms * SYMESZ );
for ( i = 0 , ext_sym = coff_symtab ; i < nb_syms ; i ++ , ext_sym ++ ) {
for ( i = 0 ; i < 8 ; i ++ )
printf ( " %02x" , (( uint8_t * ) ext_sym -> e . e_name )[ i ]);
printf ( " \n " );
771
772
}
773
774
n_strtab = load_data ( fd , ( fhdr . f_symptr + fhdr . f_nsyms * SYMESZ ), STRTAB_SIZE );
ths
authored
18 years ago
775
strtab = load_data ( fd , ( fhdr . f_symptr + fhdr . f_nsyms * SYMESZ ), * n_strtab );
ths
authored
18 years ago
776
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778
779
780
781
782
783
nb_syms = fhdr . f_nsyms ;
for ( i = 0 , ext_sym = coff_symtab ; i < nb_syms ; i ++ , ext_sym ++ ) {
if ( strstart ( ext_sym -> e . e_name , ".text" , NULL ))
text_shndx = ext_sym -> e_scnum ;
if ( strstart ( ext_sym -> e . e_name , ".data" , NULL ))
data_shndx = ext_sym -> e_scnum ;
784
}
785
786
787
788
789
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793
794
795
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797
798
799
800
801
802
803
804
805
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808
809
810
811
812
813
814
815
816
817
818
819
820
821
/* set coff symbol */
symtab = malloc ( sizeof ( struct coff_sym ) * nb_syms );
for ( i = 0 , ext_sym = coff_symtab , sym = symtab ; i < nb_syms ; i ++ , ext_sym ++ , sym ++ ) {
memset ( sym , 0 , sizeof ( * sym ));
sym -> st_syment = ext_sym ;
sym_ent_name ( ext_sym , sym );
sym -> st_value = ext_sym -> e_value ;
aux_size = * ( int8_t * ) ext_sym -> e_numaux ;
if ( ext_sym -> e_scnum == text_shndx && ext_sym -> e_type == T_FUNCTION ) {
for ( j = aux_size + 1 ; j < nb_syms - i ; j ++ ) {
if (( ext_sym + j ) -> e_scnum == text_shndx &&
( ext_sym + j ) -> e_type == T_FUNCTION ){
sym -> st_size = ( ext_sym + j ) -> e_value - ext_sym -> e_value ;
break ;
} else if ( j == nb_syms - i - 1 ) {
sec = & shdr [ coff_text_shndx ];
sym -> st_size = sec -> s_size - ext_sym -> e_value ;
break ;
}
}
} else if ( ext_sym -> e_scnum == data_shndx && * ( uint8_t * ) ext_sym -> e_sclass == C_EXTERNAL ) {
for ( j = aux_size + 1 ; j < nb_syms - i ; j ++ ) {
if (( ext_sym + j ) -> e_scnum == data_shndx ) {
sym -> st_size = ( ext_sym + j ) -> e_value - ext_sym -> e_value ;
break ;
} else if ( j == nb_syms - i - 1 ) {
sec = & shdr [ coff_data_shndx ];
sym -> st_size = sec -> s_size - ext_sym -> e_value ;
break ;
}
}
} else {
sym -> st_size = 0 ;
}
ths
authored
18 years ago
822
823
824
825
826
sym -> st_type = ext_sym -> e_type ;
sym -> st_shndx = ext_sym -> e_scnum ;
}
ths
authored
18 years ago
827
828
829
830
831
832
833
834
/* find text relocations, if any */
sec = & shdr [ coff_text_shndx ];
coff_relocs = load_data ( fd , sec -> s_relptr , sec -> s_nreloc * RELSZ );
nb_relocs = sec -> s_nreloc ;
/* set coff relocation */
relocs = malloc ( sizeof ( struct coff_rel ) * nb_relocs );
ths
authored
18 years ago
835
for ( i = 0 , ext_rel = coff_relocs , rel = relocs ; i < nb_relocs ;
836
837
838
839
840
841
842
i ++ , ext_rel ++ , rel ++ ) {
memset ( rel , 0 , sizeof ( * rel ));
rel -> r_reloc = ext_rel ;
rel -> r_offset = * ( uint32_t * ) ext_rel -> r_vaddr ;
rel -> r_type = * ( uint16_t * ) ext_rel -> r_type ;
}
return 0 ;
843
844
}
845
846
# endif /* CONFIG_FORMAT_COFF */
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
# ifdef CONFIG_FORMAT_MACH
/* File Header */
struct mach_header mach_hdr ;
/* commands */
struct segment_command * segment = 0 ;
struct dysymtab_command * dysymtabcmd = 0 ;
struct symtab_command * symtabcmd = 0 ;
/* section */
struct section * section_hdr ;
struct section * text_sec_hdr ;
uint8_t ** sdata ;
/* relocs */
struct relocation_info * relocs ;
ths
authored
18 years ago
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
/* symbols */
EXE_SYM * symtab ;
struct nlist * symtab_std ;
char * strtab ;
/* indirect symbols */
uint32_t * tocdylib ;
/* Utility functions */
static inline char * find_str_by_index ( int index )
{
return strtab + index ;
}
/* Used by dyngen common code */
static char * get_sym_name ( EXE_SYM * sym )
{
char * name = find_str_by_index ( sym -> n_un . n_strx );
ths
authored
18 years ago
884
885
886
if ( sym -> n_type & N_STAB ) /* Debug symbols are ignored */
return "debug" ;
ths
authored
18 years ago
887
888
889
890
891
892
893
894
895
896
if ( ! name )
return name ;
if ( name [ 0 ] == '_' )
return name + 1 ;
else
return name ;
}
/* find a section index given its segname, sectname */
ths
authored
18 years ago
897
static int find_mach_sec_index ( struct section * section_hdr , int shnum , const char * segname ,
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
const char * sectname )
{
int i ;
struct section * sec = section_hdr ;
for ( i = 0 ; i < shnum ; i ++ , sec ++ ) {
if ( ! sec -> segname || ! sec -> sectname )
continue ;
if ( ! strcmp ( sec -> sectname , sectname ) && ! strcmp ( sec -> segname , segname ))
return i ;
}
return - 1 ;
}
/* find a section header given its segname, sectname */
ths
authored
18 years ago
913
struct section * find_mach_sec_hdr ( struct section * section_hdr , int shnum , const char * segname ,
914
915
916
917
918
919
920
921
922
923
924
925
const char * sectname )
{
int index = find_mach_sec_index ( section_hdr , shnum , segname , sectname );
if ( index == - 1 )
return NULL ;
return section_hdr + index ;
}
static inline void fetch_next_pair_value ( struct relocation_info * rel , unsigned int * value )
{
struct scattered_relocation_info * scarel ;
ths
authored
18 years ago
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
if ( R_SCATTERED & rel -> r_address ) {
scarel = ( struct scattered_relocation_info * ) rel ;
if ( scarel -> r_type != PPC_RELOC_PAIR )
error ( "fetch_next_pair_value: looking for a pair which was not found (1)" );
* value = scarel -> r_value ;
} else {
if ( rel -> r_type != PPC_RELOC_PAIR )
error ( "fetch_next_pair_value: looking for a pair which was not found (2)" );
* value = rel -> r_address ;
}
}
/* find a sym name given its value, in a section number */
static const char * find_sym_with_value_and_sec_number ( int value , int sectnum , int * offset )
{
int i , ret = - 1 ;
ths
authored
18 years ago
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
for ( i = 0 ; i < nb_syms ; i ++ )
{
if ( ! ( symtab [ i ]. n_type & N_STAB ) && ( symtab [ i ]. n_type & N_SECT ) &&
( symtab [ i ]. n_sect == sectnum ) && ( symtab [ i ]. st_value <= value ) )
{
if ( ( ret < 0 ) || ( symtab [ i ]. st_value >= symtab [ ret ]. st_value ) )
ret = i ;
}
}
if ( ret < 0 ) {
* offset = 0 ;
return 0 ;
} else {
* offset = value - symtab [ ret ]. st_value ;
return get_sym_name ( & symtab [ ret ]);
}
}
ths
authored
18 years ago
962
963
/*
* Find symbol name given a ( virtual ) address , and a section which is of type
964
965
966
967
968
969
* S_NON_LAZY_SYMBOL_POINTERS or S_LAZY_SYMBOL_POINTERS or S_SYMBOL_STUBS
*/
static const char * find_reloc_name_in_sec_ptr ( int address , struct section * sec_hdr )
{
unsigned int tocindex , symindex , size ;
const char * name = 0 ;
ths
authored
18 years ago
970
971
972
973
/* Sanity check */
if ( ! ( address >= sec_hdr -> addr && address < ( sec_hdr -> addr + sec_hdr -> size ) ) )
return ( char * ) 0 ;
ths
authored
18 years ago
974
975
976
977
978
if ( sec_hdr -> flags & S_SYMBOL_STUBS ){
size = sec_hdr -> reserved2 ;
if ( size == 0 )
error ( "size = 0" );
ths
authored
18 years ago
979
980
981
982
983
984
985
}
else if ( sec_hdr -> flags & S_LAZY_SYMBOL_POINTERS ||
sec_hdr -> flags & S_NON_LAZY_SYMBOL_POINTERS )
size = sizeof ( unsigned long );
else
return 0 ;
ths
authored
18 years ago
986
987
988
989
/* Compute our index in toc */
tocindex = ( address - sec_hdr -> addr ) / size ;
symindex = tocdylib [ sec_hdr -> reserved1 + tocindex ];
ths
authored
18 years ago
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
name = get_sym_name ( & symtab [ symindex ]);
return name ;
}
static const char * find_reloc_name_given_its_address ( int address )
{
unsigned int i ;
for ( i = 0 ; i < segment -> nsects ; i ++ )
{
const char * name = find_reloc_name_in_sec_ptr ( address , & section_hdr [ i ]);
if (( long ) name != - 1 )
return name ;
}
return 0 ;
}
static const char * get_reloc_name ( EXE_RELOC * rel , int * sslide )
{
char * name = 0 ;
struct scattered_relocation_info * sca_rel = ( struct scattered_relocation_info * ) rel ;
int sectnum = rel -> r_symbolnum ;
int sectoffset ;
int other_half = 0 ;
ths
authored
18 years ago
1015
1016
1017
/* init the slide value */
* sslide = 0 ;
ths
authored
18 years ago
1018
1019
1020
1021
1022
1023
1024
if ( R_SCATTERED & rel -> r_address )
return ( char * ) find_reloc_name_given_its_address ( sca_rel -> r_value );
if ( rel -> r_extern )
{
/* ignore debug sym */
ths
authored
18 years ago
1025
if ( symtab [ rel -> r_symbolnum ]. n_type & N_STAB )
1026
1027
1028
1029
1030
1031
return 0 ;
return get_sym_name ( & symtab [ rel -> r_symbolnum ]);
}
/* Intruction contains an offset to the symbols pointed to, in the rel->r_symbolnum section */
sectoffset = * ( uint32_t * )( text + rel -> r_address ) & 0xffff ;
ths
authored
18 years ago
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
if ( sectnum == 0xffffff )
return 0 ;
/* Sanity Check */
if ( sectnum > segment -> nsects )
error ( "sectnum > segment->nsects" );
switch ( rel -> r_type )
{
1042
case PPC_RELOC_LO16 : fetch_next_pair_value ( rel + 1 , & other_half ); sectoffset |= ( other_half << 16 );
1043
break ;
1044
case PPC_RELOC_HI16 : fetch_next_pair_value ( rel + 1 , & other_half ); sectoffset = ( sectoffset << 16 ) | ( uint16_t )( other_half & 0xffff );
1045
break ;
1046
case PPC_RELOC_HA16 : fetch_next_pair_value ( rel + 1 , & other_half ); sectoffset = ( sectoffset << 16 ) + ( int16_t )( other_half & 0xffff );
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
break ;
case PPC_RELOC_BR24 :
sectoffset = ( * ( uint32_t * )( text + rel -> r_address ) & 0x03fffffc );
if ( sectoffset & 0x02000000 ) sectoffset |= 0xfc000000 ;
break ;
default :
error ( "switch(rel->type) not found" );
}
if ( rel -> r_pcrel )
sectoffset += rel -> r_address ;
ths
authored
18 years ago
1058
1059
1060
1061
1062
1063
1064
if ( rel -> r_type == PPC_RELOC_BR24 )
name = ( char * ) find_reloc_name_in_sec_ptr (( int ) sectoffset , & section_hdr [ sectnum - 1 ]);
/* search it in the full symbol list, if not found */
if ( ! name )
name = ( char * ) find_sym_with_value_and_sec_number ( sectoffset , sectnum , sslide );
ths
authored
18 years ago
1065
1066
1067
1068
1069
1070
1071
1072
1073
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1083
1084
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1089
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1094
1095
1096
return name ;
}
/* Used by dyngen common code */
static const char * get_rel_sym_name ( EXE_RELOC * rel )
{
int sslide ;
return get_reloc_name ( rel , & sslide );
}
/* Used by dyngen common code */
static host_ulong get_rel_offset ( EXE_RELOC * rel )
{
struct scattered_relocation_info * sca_rel = ( struct scattered_relocation_info * ) rel ;
if ( R_SCATTERED & rel -> r_address )
return sca_rel -> r_address ;
else
return rel -> r_address ;
}
/* load a mach-o object file */
int load_object ( const char * filename )
{
int fd ;
unsigned int offset_to_segment = 0 ;
unsigned int offset_to_dysymtab = 0 ;
unsigned int offset_to_symtab = 0 ;
struct load_command lc ;
unsigned int i , j ;
EXE_SYM * sym ;
struct nlist * syment ;
ths
authored
18 years ago
1097
1098
fd = open ( filename , O_RDONLY );
ths
authored
18 years ago
1099
if ( fd < 0 )
1100
error ( "can't open file '%s'" , filename );
ths
authored
18 years ago
1101
1102
1103
1104
1105
1106
1107
1108
1109
/* Read Mach header. */
if ( read ( fd , & mach_hdr , sizeof ( mach_hdr )) != sizeof ( mach_hdr ))
error ( "unable to read file header" );
/* Check Mach identification. */
if ( ! check_mach_header ( mach_hdr )) {
error ( "bad Mach header" );
}
ths
authored
18 years ago
1110
1111
1112
if ( mach_hdr . cputype != CPU_TYPE_POWERPC )
error ( "Unsupported CPU" );
ths
authored
18 years ago
1113
1114
1115
if ( mach_hdr . filetype != MH_OBJECT )
error ( "Unsupported Mach Object" );
ths
authored
18 years ago
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
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1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
/* read segment headers */
for ( i = 0 , j = sizeof ( mach_hdr ); i < mach_hdr . ncmds ; i ++ )
{
if ( read ( fd , & lc , sizeof ( struct load_command )) != sizeof ( struct load_command ))
error ( "unable to read load_command" );
if ( lc . cmd == LC_SEGMENT )
{
offset_to_segment = j ;
lseek ( fd , offset_to_segment , SEEK_SET );
segment = malloc ( sizeof ( struct segment_command ));
if ( read ( fd , segment , sizeof ( struct segment_command )) != sizeof ( struct segment_command ))
error ( "unable to read LC_SEGMENT" );
}
if ( lc . cmd == LC_DYSYMTAB )
{
offset_to_dysymtab = j ;
lseek ( fd , offset_to_dysymtab , SEEK_SET );
dysymtabcmd = malloc ( sizeof ( struct dysymtab_command ));
if ( read ( fd , dysymtabcmd , sizeof ( struct dysymtab_command )) != sizeof ( struct dysymtab_command ))
error ( "unable to read LC_DYSYMTAB" );
}
if ( lc . cmd == LC_SYMTAB )
{
offset_to_symtab = j ;
lseek ( fd , offset_to_symtab , SEEK_SET );
symtabcmd = malloc ( sizeof ( struct symtab_command ));
if ( read ( fd , symtabcmd , sizeof ( struct symtab_command )) != sizeof ( struct symtab_command ))
error ( "unable to read LC_SYMTAB" );
}
j += lc . cmdsize ;
lseek ( fd , j , SEEK_SET );
}
if ( ! segment )
error ( "unable to find LC_SEGMENT" );
/* read section headers */
section_hdr = load_data ( fd , offset_to_segment + sizeof ( struct segment_command ), segment -> nsects * sizeof ( struct section ));
/* read all section data */
sdata = ( uint8_t ** ) malloc ( sizeof ( void * ) * segment -> nsects );
memset ( sdata , 0 , sizeof ( void * ) * segment -> nsects );
ths
authored
18 years ago
1160
1161
1162
1163
1164
/* Load the data in section data */
for ( i = 0 ; i < segment -> nsects ; i ++ ) {
sdata [ i ] = load_data ( fd , section_hdr [ i ]. offset , section_hdr [ i ]. size );
}
ths
authored
18 years ago
1165
1166
1167
1168
1169
1170
1171
/* text section */
text_sec_hdr = find_mach_sec_hdr ( section_hdr , segment -> nsects , SEG_TEXT , SECT_TEXT );
i = find_mach_sec_index ( section_hdr , segment -> nsects , SEG_TEXT , SECT_TEXT );
if ( i == - 1 || ! text_sec_hdr )
error ( "could not find __TEXT,__text section" );
text = sdata [ i ];
ths
authored
18 years ago
1172
1173
1174
1175
/* Make sure dysym was loaded */
if ( ! ( int ) dysymtabcmd )
error ( "could not find __DYSYMTAB segment" );
ths
authored
18 years ago
1176
1177
1178
/* read the table of content of the indirect sym */
tocdylib = load_data ( fd , dysymtabcmd -> indirectsymoff , dysymtabcmd -> nindirectsyms * sizeof ( uint32_t ) );
ths
authored
18 years ago
1179
1180
1181
1182
1183
1184
1185
1186
/* Make sure symtab was loaded */
if ( ! ( int ) symtabcmd )
error ( "could not find __SYMTAB segment" );
nb_syms = symtabcmd -> nsyms ;
symtab_std = load_data ( fd , symtabcmd -> symoff , symtabcmd -> nsyms * sizeof ( struct nlist ));
strtab = load_data ( fd , symtabcmd -> stroff , symtabcmd -> strsize );
ths
authored
18 years ago
1187
1188
symtab = malloc ( sizeof ( EXE_SYM ) * nb_syms );
ths
authored
18 years ago
1189
1190
1191
1192
1193
1194
/* Now transform the symtab, to an extended version, with the sym size, and the C name */
for ( i = 0 , sym = symtab , syment = symtab_std ; i < nb_syms ; i ++ , sym ++ , syment ++ ) {
struct nlist * sym_follow , * sym_next = 0 ;
unsigned int j ;
memset ( sym , 0 , sizeof ( * sym ));
ths
authored
18 years ago
1195
1196
if ( syment -> n_type & N_STAB ) /* Debug symbols are skipped */
1197
continue ;
ths
authored
18 years ago
1198
1199
memcpy ( sym , syment , sizeof ( * syment ));
ths
authored
18 years ago
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
/* Find the following symbol in order to get the current symbol size */
for ( j = 0 , sym_follow = symtab_std ; j < nb_syms ; j ++ , sym_follow ++ ) {
if ( sym_follow -> n_sect != 1 || sym_follow -> n_type & N_STAB || ! ( sym_follow -> n_value > sym -> st_value ))
continue ;
if ( ! sym_next ) {
sym_next = sym_follow ;
continue ;
}
if ( ! ( sym_next -> n_value > sym_follow -> n_value ))
continue ;
sym_next = sym_follow ;
}
if ( sym_next )
sym -> st_size = sym_next -> n_value - sym -> st_value ;
else
sym -> st_size = text_sec_hdr -> size - sym -> st_value ;
}
ths
authored
18 years ago
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
/* Find Reloc */
relocs = load_data ( fd , text_sec_hdr -> reloff , text_sec_hdr -> nreloc * sizeof ( struct relocation_info ));
nb_relocs = text_sec_hdr -> nreloc ;
close ( fd );
return 0 ;
}
# endif /* CONFIG_FORMAT_MACH */
1229
/* return true if the expression is a label reference */
1230
static int get_reloc_expr ( char * name , int name_size , const char * sym_name )
1231
1232
1233
1234
1235
1236
{
const char * p ;
if ( strstart ( sym_name , "__op_param" , & p )) {
snprintf ( name , name_size , "param%s" , p );
} else if ( strstart ( sym_name , "__op_gen_label" , & p )) {
1237
1238
snprintf ( name , name_size , "param%s" , p );
return 1 ;
1239
} else {
1240
# if defined ( HOST_SPARC ) || defined ( HOST_HPPA )
1241
if ( sym_name [ 0 ] == '.' )
1242
snprintf ( name , name_size ,
1243
1244
1245
1246
1247
1248
"(long)(&__dot_%s)" ,
sym_name + 1 );
else
# endif
snprintf ( name , name_size , "(long)(&%s)" , sym_name );
}
1249
return 0 ;
1250
1251
}
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
# ifdef HOST_IA64
# define PLT_ENTRY_SIZE 16 /* 1 bundle containing "brl" */
struct plt_entry {
struct plt_entry * next ;
const char * name ;
unsigned long addend ;
} * plt_list ;
static int
get_plt_index ( const char * name , unsigned long addend )
{
struct plt_entry * plt , * prev = NULL ;
int index = 0 ;
/* see if we already have an entry for this target: */
for ( plt = plt_list ; plt ; ++ index , prev = plt , plt = plt -> next )
if ( strcmp ( plt -> name , name ) == 0 && plt -> addend == addend )
return index ;
/* nope; create a new PLT entry: */
plt = malloc ( sizeof ( * plt ));
if ( ! plt ) {
perror ( "malloc" );
exit ( 1 );
}
memset ( plt , 0 , sizeof ( * plt ));
plt -> name = strdup ( name );
plt -> addend = addend ;
/* append to plt-list: */
if ( prev )
prev -> next = plt ;
else
plt_list = plt ;
return index ;
}
# endif
1294
1295
1296
# define MAX_ARGS 3
/* generate op code */
1297
1298
static void gen_code ( const char * name , host_ulong offset , host_ulong size ,
FILE * outfile , int gen_switch )
1299
1300
1301
{
int copy_size = 0 ;
uint8_t * p_start , * p_end ;
1302
host_ulong start_offset ;
1303
int nb_args , i , n ;
1304
1305
uint8_t args_present [ MAX_ARGS ];
const char * sym_name , * p ;
1306
EXE_RELOC * rel ;
1307
1308
1309
1310
1311
1312
/* Compute exact size excluding prologue and epilogue instructions .
* Increment start_offset to skip epilogue instructions , then compute
* copy_size the indicate the size of the remaining instructions ( in
* bytes ).
*/
1313
1314
p_start = text + offset ;
p_end = p_start + size ;
1315
start_offset = offset ;
1316
# if defined ( HOST_I386 ) || defined ( HOST_X86_64 )
1317
1318
1319
1320
1321
1322
1323
1324
1325
# ifdef CONFIG_FORMAT_COFF
{
uint8_t * p ;
p = p_end - 1 ;
if ( p == p_start )
error ( "empty code for %s" , name );
while ( * p != 0xc3 ) {
p -- ;
if ( p <= p_start )
1326
error ( "ret or jmp expected at the end of %s" , name );
1327
}
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
copy_size = p - p_start ;
}
# else
{
int len ;
len = p_end - p_start ;
if ( len == 0 )
error ( "empty code for %s" , name );
if ( p_end [ - 1 ] == 0xc3 ) {
len -- ;
} else {
error ( "ret or jmp expected at the end of %s" , name );
1340
}
1341
1342
copy_size = len ;
}
ths
authored
18 years ago
1343
# endif
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
# elif defined ( HOST_PPC )
{
uint8_t * p ;
p = ( void * )( p_end - 4 );
if ( p == p_start )
error ( "empty code for %s" , name );
if ( get32 (( uint32_t * ) p ) != 0x4e800020 )
error ( "blr expected at the end of %s" , name );
copy_size = p - p_start ;
}
# elif defined ( HOST_S390 )
{
uint8_t * p ;
p = ( void * )( p_end - 2 );
if ( p == p_start )
error ( "empty code for %s" , name );
ths
authored
17 years ago
1360
1361
if (( get16 (( uint16_t * ) p ) & 0xfff0 ) != 0x07f0 )
error ( "br expected at the end of %s" , name );
1362
1363
1364
1365
1366
1367
copy_size = p - p_start ;
}
# elif defined ( HOST_ALPHA )
{
uint8_t * p ;
p = p_end - 4 ;
1368
# if 0
1369
1370
1371
/* XXX: check why it occurs */
if ( p == p_start )
error ( "empty code for %s" , name );
1372
# endif
1373
1374
if ( get32 (( uint32_t * ) p ) != 0x6bfa8001 )
error ( "ret expected at the end of %s" , name );
ths
authored
18 years ago
1375
copy_size = p - p_start ;
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
}
# elif defined ( HOST_IA64 )
{
uint8_t * p ;
p = ( void * )( p_end - 4 );
if ( p == p_start )
error ( "empty code for %s" , name );
/* br.ret.sptk.many b0;; */
/* 08 00 84 00 */
if ( get32 (( uint32_t * ) p ) != 0x00840008 )
error ( "br.ret.sptk.many b0;; expected at the end of %s" , name );
1387
copy_size = p_end - p_start ;
1388
1389
1390
}
# elif defined ( HOST_SPARC )
{
1391
1392
# define INSN_SAVE 0x9de3a000
# define INSN_RET 0x81c7e008
1393
# define INSN_RETL 0x81c3e008
1394
1395
1396
# define INSN_RESTORE 0x81e80000
# define INSN_RETURN 0x81cfe008
# define INSN_NOP 0x01000000
1397
1398
# define INSN_ADD_SP 0x9c03a000 // add % sp , nn , % sp
# define INSN_SUB_SP 0x9c23a000 // sub % sp , nn , % sp
1399
1400
1401
1402
1403
1404
1405
1406
1407
uint32_t start_insn , end_insn1 , end_insn2 ;
uint8_t * p ;
p = ( void * )( p_end - 8 );
if ( p <= p_start )
error ( "empty code for %s" , name );
start_insn = get32 (( uint32_t * )( p_start + 0x0 ));
end_insn1 = get32 (( uint32_t * )( p + 0x0 ));
end_insn2 = get32 (( uint32_t * )( p + 0x4 ));
1408
1409
if ((( start_insn & ~ 0x1fff ) == INSN_SAVE ) ||
( start_insn & ~ 0x1fff ) == INSN_ADD_SP ) {
1410
1411
p_start += 0x4 ;
start_offset += 0x4 ;
1412
1413
1414
1415
if ( end_insn1 == INSN_RET && end_insn2 == INSN_RESTORE )
/* SPARC v7: ret; restore; */ ;
else if ( end_insn1 == INSN_RETURN && end_insn2 == INSN_NOP )
/* SPARC v9: return; nop; */ ;
1416
1417
else if ( end_insn1 == INSN_RETL && ( end_insn2 & ~ 0x1fff ) == INSN_SUB_SP )
/* SPARC v7: retl; sub %sp, nn, %sp; */ ;
1418
1419
else
1420
error ( "ret; restore; not found at end of %s" , name );
1421
1422
} else if ( end_insn1 == INSN_RETL && end_insn2 == INSN_NOP ) {
;
1423
1424
1425
} else {
error ( "No save at the beginning of %s" , name );
}
1426
# if 0
1427
1428
1429
/* Skip a preceeding nop, if present. */
if ( p > p_start ) {
skip_insn = get32 (( uint32_t * )( p - 0x4 ));
1430
if ( skip_insn == INSN_NOP )
1431
1432
p -= 4 ;
}
1433
# endif
1434
1435
1436
1437
copy_size = p - p_start ;
}
# elif defined ( HOST_SPARC64 )
{
1438
1439
1440
1441
1442
1443
1444
1445
1446
# define INSN_SAVE 0x9de3a000
# define INSN_RET 0x81c7e008
# define INSN_RETL 0x81c3e008
# define INSN_RESTORE 0x81e80000
# define INSN_RETURN 0x81cfe008
# define INSN_NOP 0x01000000
# define INSN_ADD_SP 0x9c03a000 // add % sp , nn , % sp
# define INSN_SUB_SP 0x9c23a000 // sub % sp , nn , % sp
1447
1448
1449
uint32_t start_insn , end_insn1 , end_insn2 , skip_insn ;
uint8_t * p ;
p = ( void * )( p_end - 8 );
1450
1451
# if 0
/* XXX: check why it occurs */
1452
1453
if ( p <= p_start )
error ( "empty code for %s" , name );
1454
# endif
1455
1456
1457
start_insn = get32 (( uint32_t * )( p_start + 0x0 ));
end_insn1 = get32 (( uint32_t * )( p + 0x0 ));
end_insn2 = get32 (( uint32_t * )( p + 0x4 ));
1458
1459
if ((( start_insn & ~ 0x1fff ) == INSN_SAVE ) ||
( start_insn & ~ 0x1fff ) == INSN_ADD_SP ) {
1460
1461
p_start += 0x4 ;
start_offset += 0x4 ;
1462
1463
1464
1465
1466
1467
1468
1469
if ( end_insn1 == INSN_RET && end_insn2 == INSN_RESTORE )
/* SPARC v7: ret; restore; */ ;
else if ( end_insn1 == INSN_RETURN && end_insn2 == INSN_NOP )
/* SPARC v9: return; nop; */ ;
else if ( end_insn1 == INSN_RETL && ( end_insn2 & ~ 0x1fff ) == INSN_SUB_SP )
/* SPARC v7: retl; sub %sp, nn, %sp; */ ;
else
1470
error ( "ret; restore; not found at end of %s" , name );
1471
1472
} else if ( end_insn1 == INSN_RETL && end_insn2 == INSN_NOP ) {
;
1473
1474
1475
} else {
error ( "No save at the beginning of %s" , name );
}
ths
authored
18 years ago
1476
1477
# if 0
1478
1479
1480
1481
1482
1483
/* Skip a preceeding nop, if present. */
if ( p > p_start ) {
skip_insn = get32 (( uint32_t * )( p - 0x4 ));
if ( skip_insn == 0x01000000 )
p -= 4 ;
}
1484
# endif
ths
authored
18 years ago
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
copy_size = p - p_start ;
}
# elif defined ( HOST_M68K )
{
uint8_t * p ;
p = ( void * )( p_end - 2 );
if ( p == p_start )
error ( "empty code for %s" , name );
// remove NOP ' s , probably added for alignment
while (( get16 (( uint16_t * ) p ) == 0x4e71 ) &&
ths
authored
18 years ago
1496
( p > p_start ))
1497
1498
1499
1500
1501
p -= 2 ;
if ( get16 (( uint16_t * ) p ) != 0x4e75 )
error ( "rts expected at the end of %s" , name );
copy_size = p - p_start ;
}
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
# elif defined ( HOST_HPPA )
{
uint8_t * p ;
p = p_start ;
while ( p < p_end ) {
uint32_t insn = get32 (( uint32_t * ) p );
if ( insn == 0x6bc23fd9 || /* stw rp,-14(sp) */
insn == 0x08030241 || /* copy r3,r1 */
insn == 0x081e0243 || /* copy sp,r3 */
( insn & 0xffffc000 ) == 0x37de0000 || /* ldo x(sp),sp */
( insn & 0xffffc000 ) == 0x6fc10000 ) /* stwm r1,x(sp) */
p += 4 ;
else
break ;
}
start_offset += p - p_start ;
p_start = p ;
p = p_end - 4 ;
while ( p > p_start ) {
uint32_t insn = get32 (( uint32_t * ) p );
if (( insn & 0xffffc000 ) == 0x347e0000 || /* ldo x(r3),sp */
( insn & 0xffe0c000 ) == 0x4fc00000 || /* ldwm x(sp),rx */
( insn & 0xffffc000 ) == 0x37de0000 || /* ldo x(sp),sp */
insn == 0x48623fd9 || /* ldw -14(r3),rp */
insn == 0xe840c000 || /* bv r0(rp) */
insn == 0xe840c002 ) /* bv,n r0(rp) */
p -= 4 ;
else
break ;
}
p += 4 ;
if ( p <= p_start )
error ( "empty code for %s" , name );
copy_size = p - p_start ;
}
ths
authored
18 years ago
1539
# elif defined ( HOST_MIPS ) || defined ( HOST_MIPS64 )
ths
authored
18 years ago
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
{
# define INSN_RETURN 0x03e00008
# define INSN_NOP 0x00000000
uint8_t * p = p_end ;
if ( p < ( p_start + 0x8 )) {
error ( "empty code for %s" , name );
} else {
uint32_t end_insn1 , end_insn2 ;
p -= 0x8 ;
end_insn1 = get32 (( uint32_t * )( p + 0x0 ));
end_insn2 = get32 (( uint32_t * )( p + 0x4 ));
if ( end_insn1 != INSN_RETURN && end_insn2 != INSN_NOP )
error ( "jr ra not found at end of %s" , name );
}
copy_size = p - p_start ;
}
1559
1560
# elif defined ( HOST_ARM )
error ( "dyngen targets not supported on ARM" );
malc
authored
17 years ago
1561
1562
# elif defined ( HOST_PPC64 )
error ( "dyngen targets not supported on PPC64" );
1563
1564
1565
# else
# error unsupported CPU
# endif
1566
1567
1568
1569
1570
/* compute the number of arguments by looking at the relocations */
for ( i = 0 ; i < MAX_ARGS ; i ++ )
args_present [ i ] = 0 ;
1571
for ( i = 0 , rel = relocs ; i < nb_relocs ; i ++ , rel ++ ) {
1572
1573
1574
host_ulong offset = get_rel_offset ( rel );
if ( offset >= start_offset &&
offset < start_offset + ( p_end - p_start )) {
1575
sym_name = get_rel_sym_name ( rel );
1576
1577
if ( ! sym_name )
continue ;
1578
1579
if ( strstart ( sym_name , "__op_param" , & p ) ||
strstart ( sym_name , "__op_gen_label" , & p )) {
1580
n = strtoul ( p , NULL , 10 );
1581
if ( n > MAX_ARGS )
1582
1583
error ( "too many arguments in %s" , name );
args_present [ n - 1 ] = 1 ;
1584
1585
1586
}
}
}
ths
authored
18 years ago
1587
1588
1589
1590
1591
1592
1593
1594
1595
nb_args = 0 ;
while ( nb_args < MAX_ARGS && args_present [ nb_args ])
nb_args ++ ;
for ( i = nb_args ; i < MAX_ARGS ; i ++ ) {
if ( args_present [ i ])
error ( "inconsistent argument numbering in %s" , name );
}
1596
if ( gen_switch == 2 ) {
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
# if defined ( HOST_HPPA )
int op_size = copy_size ;
int has_stubs = 0 ;
char relname [ 256 ];
int type , is_label ;
for ( i = 0 , rel = relocs ; i < nb_relocs ; i ++ , rel ++ ) {
if ( rel -> r_offset >= start_offset &&
rel -> r_offset < start_offset + copy_size ) {
sym_name = get_rel_sym_name ( rel );
sym_name = strtab + symtab [ ELF32_R_SYM ( rel -> r_info )]. st_name ;
is_label = get_reloc_expr ( relname , sizeof ( relname ), sym_name );
type = ELF32_R_TYPE ( rel -> r_info );
if ( ! is_label && type == R_PARISC_PCREL17F ) {
has_stubs = 1 ;
op_size += 8 ; /* ldil and be,n instructions */
}
}
}
if ( has_stubs )
op_size += 4 ; /* b,l,n instruction, to skip past the stubs */
fprintf ( outfile , "DEF(%s, %d, %d) \n " , name + 3 , nb_args , op_size );
# else
fprintf ( outfile , "DEF(%s, %d, %d) \n " , name + 3 , nb_args , copy_size );
# endif
1627
} else if ( gen_switch == 1 ) {
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
/* output C code */
fprintf ( outfile , "case INDEX_%s: { \n " , name );
if ( nb_args > 0 ) {
fprintf ( outfile , " long " );
for ( i = 0 ; i < nb_args ; i ++ ) {
if ( i != 0 )
fprintf ( outfile , ", " );
fprintf ( outfile , "param%d" , i + 1 );
}
fprintf ( outfile , "; \n " );
1639
}
1640
1641
1642
# if defined ( HOST_IA64 )
fprintf ( outfile , " extern char %s; \n " , name );
# else
1643
fprintf ( outfile , " extern void %s(); \n " , name );
1644
# endif
1645
1646
for ( i = 0 , rel = relocs ; i < nb_relocs ; i ++ , rel ++ ) {
1647
1648
1649
host_ulong offset = get_rel_offset ( rel );
if ( offset >= start_offset &&
offset < start_offset + ( p_end - p_start )) {
1650
sym_name = get_rel_sym_name ( rel );
1651
1652
if ( ! sym_name )
continue ;
ths
authored
18 years ago
1653
if ( * sym_name &&
1654
! strstart ( sym_name , "__op_param" , NULL ) &&
1655
1656
! strstart ( sym_name , "__op_jmp" , NULL ) &&
! strstart ( sym_name , "__op_gen_label" , NULL )) {
1657
# if defined ( HOST_SPARC ) || defined ( HOST_HPPA )
1658
1659
1660
1661
1662
1663
1664
if ( sym_name [ 0 ] == '.' ) {
fprintf ( outfile ,
"extern char __dot_%s __asm__( \" %s \" ); \n " ,
sym_name + 1 , sym_name );
continue ;
}
# endif
1665
# if defined ( __APPLE__ )
ths
authored
18 years ago
1666
1667
1668
/* Set __attribute (( unused )) on darwin because we
want to avoid warning when we don ' t use the symbol . */
fprintf ( outfile , " extern char %s __attribute__((unused)); \n " , sym_name );
1669
1670
1671
1672
1673
1674
1675
1676
1677
# elif defined ( HOST_IA64 )
if ( ELF64_R_TYPE ( rel -> r_info ) != R_IA64_PCREL21B )
/*
* PCREL21 br . call targets generally
* are out of range and need to go
* through an "import stub" .
*/
fprintf ( outfile , " extern char %s; \n " ,
sym_name );
1678
# else
1679
fprintf ( outfile , "extern char %s; \n " , sym_name );
1680
# endif
1681
1682
1683
1684
}
}
}
1685
1686
1687
1688
# ifdef __hppa__
fprintf ( outfile , " memcpy(gen_code_ptr, (void *)((char *)__canonicalize_funcptr_for_compare(%s)+%d), %d); \n " ,
name , ( int )( start_offset - offset ), copy_size );
# else
1689
1690
fprintf ( outfile , " memcpy(gen_code_ptr, (void *)((char *)&%s+%d), %d); \n " ,
name , ( int )( start_offset - offset ), copy_size );
1691
# endif
1692
1693
1694
/* emit code offset information */
{
1695
EXE_SYM * sym ;
1696
const char * sym_name , * p ;
1697
host_ulong val ;
1698
1699
1700
int n ;
for ( i = 0 , sym = symtab ; i < nb_syms ; i ++ , sym ++ ) {
1701
sym_name = get_sym_name ( sym );
1702
if ( strstart ( sym_name , "__op_label" , & p )) {
1703
uint8_t * ptr ;
1704
unsigned long offset ;
ths
authored
18 years ago
1705
1706
1707
/* test if the variable refers to a label inside
the code we are generating */
1708
1709
1710
1711
1712
1713
1714
1715
# ifdef CONFIG_FORMAT_COFF
if ( sym -> st_shndx == text_shndx ) {
ptr = sdata [ coff_text_shndx ];
} else if ( sym -> st_shndx == data_shndx ) {
ptr = sdata [ coff_data_shndx ];
} else {
ptr = NULL ;
}
1716
1717
1718
1719
# elif defined ( CONFIG_FORMAT_MACH )
if ( ! sym -> n_sect )
continue ;
ptr = sdata [ sym -> n_sect - 1 ];
1720
# else
1721
ptr = sdata [ sym -> st_shndx ];
1722
# endif
1723
1724
1725
if ( ! ptr )
error ( "__op_labelN in invalid section" );
offset = sym -> st_value ;
1726
1727
1728
# ifdef CONFIG_FORMAT_MACH
offset -= section_hdr [ sym -> n_sect - 1 ]. addr ;
# endif
1729
val = * ( host_ulong * )( ptr + offset );
1730
1731
1732
1733
1734
1735
1736
# ifdef ELF_USES_RELOCA
{
int reloc_shndx , nb_relocs1 , j ;
/* try to find a matching relocation */
reloc_shndx = find_reloc ( sym -> st_shndx );
if ( reloc_shndx ) {
ths
authored
18 years ago
1737
nb_relocs1 = shdr [ reloc_shndx ]. sh_size /
1738
1739
1740
1741
shdr [ reloc_shndx ]. sh_entsize ;
rel = ( ELF_RELOC * ) sdata [ reloc_shndx ];
for ( j = 0 ; j < nb_relocs1 ; j ++ ) {
if ( rel -> r_offset == offset ) {
1742
val = rel -> r_addend ;
1743
1744
1745
1746
1747
1748
break ;
}
rel ++ ;
}
}
}
ths
authored
18 years ago
1749
# endif
1750
if ( val >= start_offset && val <= start_offset + copy_size ) {
1751
n = strtol ( p , NULL , 10 );
1752
fprintf ( outfile , " label_offsets[%d] = %ld + (gen_code_ptr - gen_code_buf); \n " , n , ( long )( val - start_offset ));
1753
1754
1755
1756
1757
}
}
}
}
ths
authored
18 years ago
1758
/* load parameters in variables */
1759
1760
1761
1762
1763
for ( i = 0 ; i < nb_args ; i ++ ) {
fprintf ( outfile , " param%d = *opparam_ptr++; \n " , i + 1 );
}
/* patch relocations */
1764
# if defined ( HOST_I386 )
1765
{
ths
authored
18 years ago
1766
char relname [ 256 ];
1767
int type , is_label ;
1768
int addend ;
1769
int reloc_offset ;
1770
for ( i = 0 , rel = relocs ; i < nb_relocs ; i ++ , rel ++ ) {
1771
1772
if ( rel -> r_offset >= start_offset &&
rel -> r_offset < start_offset + copy_size ) {
1773
sym_name = get_rel_sym_name ( rel );
1774
1775
if ( ! sym_name )
continue ;
1776
reloc_offset = rel -> r_offset - start_offset ;
1777
1778
1779
1780
1781
1782
1783
1784
if ( strstart ( sym_name , "__op_jmp" , & p )) {
int n ;
n = strtol ( p , NULL , 10 );
/* __op_jmp relocations are done at
runtime to do translated block
chaining : the offset of the instruction
needs to be stored */
fprintf ( outfile , " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf); \n " ,
1785
n , reloc_offset );
1786
1787
continue ;
}
1788
1789
is_label = get_reloc_expr ( relname , sizeof ( relname ), sym_name );
1790
addend = get32 (( uint32_t * )( text + rel -> r_offset ));
1791
1792
# ifdef CONFIG_FORMAT_ELF
type = ELF32_R_TYPE ( rel -> r_info );
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
if ( is_label ) {
switch ( type ) {
case R_386_32 :
case R_386_PC32 :
fprintf ( outfile , " tcg_out_reloc(s, gen_code_ptr + %d, %d, %s, %d); \n " ,
reloc_offset , type , relname , addend );
break ;
default :
error ( "unsupported i386 relocation (%d)" , type );
}
} else {
switch ( type ) {
case R_386_32 :
fprintf ( outfile , " *(uint32_t *)(gen_code_ptr + %d) = %s + %d; \n " ,
reloc_offset , relname , addend );
break ;
case R_386_PC32 :
fprintf ( outfile , " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d; \n " ,
reloc_offset , relname , reloc_offset , addend );
break ;
default :
error ( "unsupported i386 relocation (%d)" , type );
}
1816
}
1817
# elif defined ( CONFIG_FORMAT_COFF )
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
{
char * temp_name ;
int j ;
EXE_SYM * sym ;
temp_name = get_sym_name ( symtab + * ( uint32_t * )( rel -> r_reloc -> r_symndx ));
if ( ! strcmp ( temp_name , ".data" )) {
for ( j = 0 , sym = symtab ; j < nb_syms ; j ++ , sym ++ ) {
if ( strstart ( sym -> st_name , sym_name , NULL )) {
addend -= sym -> st_value ;
}
}
}
}
1831
type = rel -> r_type ;
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
if ( is_label ) {
/* TCG uses elf relocation constants */
# define R_386_32 1
# define R_386_PC32 2
switch ( type ) {
case DIR32 :
type = R_386_32 ;
goto do_reloc ;
case DISP32 :
type = R_386_PC32 ;
addend -= 4 ;
do_reloc :
fprintf ( outfile , " tcg_out_reloc(s, gen_code_ptr + %d, %d, %s, %d); \n " ,
reloc_offset , type , relname , addend );
break ;
default :
error ( "unsupported i386 relocation (%d)" , type );
}
} else {
switch ( type ) {
case DIR32 :
fprintf ( outfile , " *(uint32_t *)(gen_code_ptr + %d) = %s + %d; \n " ,
reloc_offset , relname , addend );
break ;
case DISP32 :
fprintf ( outfile , " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d -4; \n " ,
reloc_offset , relname , reloc_offset , addend );
break ;
default :
error ( "unsupported i386 relocation (%d)" , type );
}
1863
1864
1865
1866
}
# else
# error unsupport object format
# endif
1867
}
1868
1869
}
}
1870
# elif defined ( HOST_X86_64 )
1871
{
ths
authored
18 years ago
1872
char relname [ 256 ];
1873
int type , is_label ;
1874
int addend ;
1875
int reloc_offset ;
1876
1877
1878
1879
for ( i = 0 , rel = relocs ; i < nb_relocs ; i ++ , rel ++ ) {
if ( rel -> r_offset >= start_offset &&
rel -> r_offset < start_offset + copy_size ) {
sym_name = strtab + symtab [ ELFW ( R_SYM )( rel -> r_info )]. st_name ;
1880
is_label = get_reloc_expr ( relname , sizeof ( relname ), sym_name );
1881
1882
type = ELF32_R_TYPE ( rel -> r_info );
addend = rel -> r_addend ;
1883
reloc_offset = rel -> r_offset - start_offset ;
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
if ( is_label ) {
switch ( type ) {
case R_X86_64_32 :
case R_X86_64_32S :
case R_X86_64_PC32 :
fprintf ( outfile , " tcg_out_reloc(s, gen_code_ptr + %d, %d, %s, %d); \n " ,
reloc_offset , type , relname , addend );
break ;
default :
error ( "unsupported X86_64 relocation (%d)" , type );
}
} else {
switch ( type ) {
case R_X86_64_32 :
fprintf ( outfile , " *(uint32_t *)(gen_code_ptr + %d) = (uint32_t)%s + %d; \n " ,
reloc_offset , relname , addend );
break ;
case R_X86_64_32S :
fprintf ( outfile , " *(uint32_t *)(gen_code_ptr + %d) = (int32_t)%s + %d; \n " ,
reloc_offset , relname , addend );
break ;
case R_X86_64_PC32 :
fprintf ( outfile , " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d; \n " ,
reloc_offset , relname , reloc_offset , addend );
break ;
default :
error ( "unsupported X86_64 relocation (%d)" , type );
}
1912
1913
1914
1915
}
}
}
}
1916
# elif defined ( HOST_PPC )
1917
{
1918
# ifdef CONFIG_FORMAT_ELF
ths
authored
18 years ago
1919
char relname [ 256 ];
1920
int type ;
1921
int addend ;
1922
int is_label ;
1923
int reloc_offset ;
1924
for ( i = 0 , rel = relocs ; i < nb_relocs ; i ++ , rel ++ ) {
1925
if ( rel -> r_offset >= start_offset &&
1926
rel -> r_offset < start_offset + copy_size ) {
1927
sym_name = strtab + symtab [ ELFW ( R_SYM )( rel -> r_info )]. st_name ;
1928
reloc_offset = rel -> r_offset - start_offset ;
1929
1930
1931
1932
1933
1934
1935
1936
if ( strstart ( sym_name , "__op_jmp" , & p )) {
int n ;
n = strtol ( p , NULL , 10 );
/* __op_jmp relocations are done at
runtime to do translated block
chaining : the offset of the instruction
needs to be stored */
fprintf ( outfile , " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf); \n " ,
1937
n , reloc_offset );
1938
1939
continue ;
}
ths
authored
18 years ago
1940
ths
authored
18 years ago
1941
get_reloc_expr ( relname , sizeof ( relname ), sym_name );
1942
type = ELF32_R_TYPE ( rel -> r_info );
1943
is_label = get_reloc_expr ( relname , sizeof ( relname ), sym_name );
1944
addend = rel -> r_addend ;
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
if ( is_label ) {
switch ( type ) {
case R_PPC_REL24 :
fprintf ( outfile , " tcg_out_reloc(s, gen_code_ptr + %d, %d, %s, %d); \n " ,
reloc_offset , type , relname , addend );
break ;
default :
error ( "unsupported ppc relocation (%d)" , type );
}
}
else {
switch ( type ) {
case R_PPC_ADDR32 :
fprintf ( outfile , " *(uint32_t *)(gen_code_ptr + %d) = %s + %d; \n " ,
reloc_offset , relname , addend );
break ;
case R_PPC_ADDR16_LO :
fprintf ( outfile , " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d); \n " ,
reloc_offset , relname , addend );
break ;
case R_PPC_ADDR16_HI :
fprintf ( outfile , " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d) >> 16; \n " ,
reloc_offset , relname , addend );
break ;
case R_PPC_ADDR16_HA :
fprintf ( outfile , " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d + 0x8000) >> 16; \n " ,
reloc_offset , relname , addend );
break ;
case R_PPC_REL24 :
/* warning: must be at 32 MB distancy */
malc
authored
17 years ago
1975
1976
1977
1978
1979
1980
1981
1982
fprintf ( outfile , "{ \n "
" long disp = (%s - (long)(gen_code_ptr + %d) + %d); \n "
" if ((disp << 6) >> 6 != disp) {; \n "
" fprintf(stderr, \" Branch target is too far away \\ n \" );"
" abort(); \n "
" } \n "
"} \n " ,
relname , reloc_offset , addend );
1983
1984
1985
1986
1987
1988
fprintf ( outfile , " *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | ((%s - (long)(gen_code_ptr + %d) + %d) & 0x03fffffc); \n " ,
reloc_offset , reloc_offset , relname , reloc_offset , addend );
break ;
default :
error ( "unsupported powerpc relocation (%d)" , type );
}
1989
1990
1991
}
}
}
1992
# elif defined ( CONFIG_FORMAT_MACH )
ths
authored
18 years ago
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
struct scattered_relocation_info * scarel ;
struct relocation_info * rel ;
char final_sym_name [ 256 ];
const char * sym_name ;
const char * p ;
int slide , sslide ;
int i ;
for ( i = 0 , rel = relocs ; i < nb_relocs ; i ++ , rel ++ ) {
unsigned int offset , length , value = 0 ;
unsigned int type , pcrel , isym = 0 ;
unsigned int usesym = 0 ;
if ( R_SCATTERED & rel -> r_address ) {
scarel = ( struct scattered_relocation_info * ) rel ;
offset = ( unsigned int ) scarel -> r_address ;
length = scarel -> r_length ;
pcrel = scarel -> r_pcrel ;
type = scarel -> r_type ;
value = scarel -> r_value ;
} else {
value = isym = rel -> r_symbolnum ;
usesym = ( rel -> r_extern );
offset = rel -> r_address ;
length = rel -> r_length ;
pcrel = rel -> r_pcrel ;
type = rel -> r_type ;
}
slide = offset - start_offset ;
ths
authored
18 years ago
2024
if ( ! ( offset >= start_offset && offset < start_offset + size ))
ths
authored
18 years ago
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
continue ; /* not in our range */
sym_name = get_reloc_name ( rel , & sslide );
if ( usesym && symtab [ isym ]. n_type & N_STAB )
continue ; /* don't handle STAB (debug sym) */
if ( sym_name && strstart ( sym_name , "__op_jmp" , & p )) {
int n ;
n = strtol ( p , NULL , 10 );
fprintf ( outfile , " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf); \n " ,
n , slide );
continue ; /* Nothing more to do */
}
if ( ! sym_name ) {
fprintf ( outfile , "/* #warning relocation not handled in %s (value 0x%x, %s, offset 0x%x, length 0x%x, %s, type 0x%x) */ \n " ,
name , value , usesym ? "use sym" : "don't use sym" , offset , length , pcrel ? "pcrel" : "" , type );
continue ; /* dunno how to handle without final_sym_name */
}
ths
authored
18 years ago
2046
get_reloc_expr ( final_sym_name , sizeof ( final_sym_name ),
ths
authored
18 years ago
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
sym_name );
switch ( type ) {
case PPC_RELOC_BR24 :
if ( ! strstart ( sym_name , "__op_gen_label" , & p )) {
fprintf ( outfile , "{ \n " );
fprintf ( outfile , " uint32_t imm = *(uint32_t *)(gen_code_ptr + %d) & 0x3fffffc; \n " , slide );
fprintf ( outfile , " *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | ((imm + ((long)%s - (long)gen_code_ptr) + %d) & 0x03fffffc); \n " ,
slide , slide , name , sslide );
fprintf ( outfile , "} \n " );
} else {
fprintf ( outfile , " *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | (((long)%s - (long)gen_code_ptr - %d) & 0x03fffffc); \n " ,
slide , slide , final_sym_name , slide );
}
2060
break ;
ths
authored
18 years ago
2061
case PPC_RELOC_HI16 :
ths
authored
18 years ago
2062
fprintf ( outfile , " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d) >> 16; \n " ,
ths
authored
18 years ago
2063
2064
2065
slide , final_sym_name , sslide );
break ;
case PPC_RELOC_LO16 :
ths
authored
18 years ago
2066
fprintf ( outfile , " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d); \n " ,
ths
authored
18 years ago
2067
2068
2069
slide , final_sym_name , sslide );
break ;
case PPC_RELOC_HA16 :
ths
authored
18 years ago
2070
fprintf ( outfile , " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d + 0x8000) >> 16; \n " ,
ths
authored
18 years ago
2071
2072
2073
2074
2075
2076
slide , final_sym_name , sslide );
break ;
default :
error ( "unsupported powerpc relocation (%d)" , type );
}
}
2077
2078
2079
# else
# error unsupport object format
# endif
2080
}
2081
# elif defined ( HOST_S390 )
2082
{
ths
authored
18 years ago
2083
char relname [ 256 ];
2084
int type ;
2085
int addend ;
2086
int reloc_offset ;
2087
for ( i = 0 , rel = relocs ; i < nb_relocs ; i ++ , rel ++ ) {
2088
2089
if ( rel -> r_offset >= start_offset &&
rel -> r_offset < start_offset + copy_size ) {
2090
sym_name = strtab + symtab [ ELFW ( R_SYM )( rel -> r_info )]. st_name ;
ths
authored
18 years ago
2091
get_reloc_expr ( relname , sizeof ( relname ), sym_name );
2092
2093
type = ELF32_R_TYPE ( rel -> r_info );
addend = rel -> r_addend ;
2094
reloc_offset = rel -> r_offset - start_offset ;
2095
2096
switch ( type ) {
case R_390_32 :
ths
authored
18 years ago
2097
fprintf ( outfile , " *(uint32_t *)(gen_code_ptr + %d) = %s + %d; \n " ,
ths
authored
18 years ago
2098
reloc_offset , relname , addend );
2099
2100
break ;
case R_390_16 :
ths
authored
18 years ago
2101
fprintf ( outfile , " *(uint16_t *)(gen_code_ptr + %d) = %s + %d; \n " ,
ths
authored
18 years ago
2102
reloc_offset , relname , addend );
2103
2104
break ;
case R_390_8 :
ths
authored
18 years ago
2105
fprintf ( outfile , " *(uint8_t *)(gen_code_ptr + %d) = %s + %d; \n " ,
ths
authored
18 years ago
2106
reloc_offset , relname , addend );
2107
break ;
ths
authored
17 years ago
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
case R_390_PC32DBL :
if ( ELF32_ST_TYPE ( symtab [ ELFW ( R_SYM )( rel -> r_info )]. st_info ) == STT_SECTION ) {
fprintf ( outfile ,
" *(uint32_t *)(gen_code_ptr + %d) += "
"((long)&%s - (long)gen_code_ptr) >> 1; \n " ,
reloc_offset , name );
}
else
fprintf ( outfile ,
" *(uint32_t *)(gen_code_ptr + %d) = "
"(%s + %d - ((uint32_t)gen_code_ptr + %d)) >> 1; \n " ,
reloc_offset , relname , addend , reloc_offset );
break ;
2121
2122
2123
2124
2125
2126
default :
error ( "unsupported s390 relocation (%d)" , type );
}
}
}
}
2127
2128
2129
# elif defined ( HOST_ALPHA )
{
for ( i = 0 , rel = relocs ; i < nb_relocs ; i ++ , rel ++ ) {
2130
if ( rel -> r_offset >= start_offset && rel -> r_offset < start_offset + copy_size ) {
2131
int type ;
2132
long reloc_offset ;
2133
2134
type = ELF64_R_TYPE ( rel -> r_info );
2135
sym_name = strtab + symtab [ ELF64_R_SYM ( rel -> r_info )]. st_name ;
2136
reloc_offset = rel -> r_offset - start_offset ;
2137
2138
switch ( type ) {
case R_ALPHA_GPDISP :
2139
2140
2141
/* The gp is just 32 bit , and never changes , so it ' s easiest to emit it
as an immediate instead of constructing it from the pv or ra . */
fprintf ( outfile , " immediate_ldah(gen_code_ptr + %ld, gp); \n " ,
2142
reloc_offset );
2143
fprintf ( outfile , " immediate_lda(gen_code_ptr + %ld, gp); \n " ,
2144
reloc_offset + ( int ) rel -> r_addend );
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
break ;
case R_ALPHA_LITUSE :
/* jsr to literal hint . Could be used to optimize to bsr . Ignore for
now , since some called functions ( libc ) need pv to be set up . */
break ;
case R_ALPHA_HINT :
/* Branch target prediction hint . Ignore for now . Should be already
correct for in - function jumps . */
break ;
case R_ALPHA_LITERAL :
2155
2156
2157
2158
2159
2160
2161
2162
2163
/* Load a literal from the GOT relative to the gp . Since there ' s only a
single gp , nothing is to be done . */
break ;
case R_ALPHA_GPRELHIGH :
/* Handle fake relocations against __op_param symbol . Need to emit the
high part of the immediate value instead . Other symbols need no
special treatment . */
if ( strstart ( sym_name , "__op_param" , & p ))
fprintf ( outfile , " immediate_ldah(gen_code_ptr + %ld, param%s); \n " ,
2164
reloc_offset , p );
2165
2166
2167
2168
break ;
case R_ALPHA_GPRELLOW :
if ( strstart ( sym_name , "__op_param" , & p ))
fprintf ( outfile , " immediate_lda(gen_code_ptr + %ld, param%s); \n " ,
2169
reloc_offset , p );
2170
2171
2172
2173
break ;
case R_ALPHA_BRSGP :
/* PC - relative jump . Tweak offset to skip the two instructions that try to
set up the gp from the pv . */
2174
fprintf ( outfile , " fix_bsr(gen_code_ptr + %ld, (uint8_t *) &%s - (gen_code_ptr + %ld + 4) + 8); \n " ,
2175
reloc_offset , sym_name , reloc_offset );
2176
2177
2178
2179
2180
2181
2182
2183
2184
break ;
default :
error ( "unsupported Alpha relocation (%d)" , type );
}
}
}
}
# elif defined ( HOST_IA64 )
{
2185
2186
unsigned long sym_idx ;
long code_offset ;
ths
authored
18 years ago
2187
char relname [ 256 ];
2188
int type ;
2189
2190
long addend ;
2191
for ( i = 0 , rel = relocs ; i < nb_relocs ; i ++ , rel ++ ) {
2192
2193
2194
2195
2196
sym_idx = ELF64_R_SYM ( rel -> r_info );
if ( rel -> r_offset < start_offset
|| rel -> r_offset >= start_offset + copy_size )
continue ;
sym_name = ( strtab + symtab [ sym_idx ]. st_name );
2197
code_offset = rel -> r_offset - start_offset ;
2198
2199
2200
2201
2202
2203
2204
2205
2206
if ( strstart ( sym_name , "__op_jmp" , & p )) {
int n ;
n = strtol ( p , NULL , 10 );
/* __op_jmp relocations are done at
runtime to do translated block
chaining : the offset of the instruction
needs to be stored */
fprintf ( outfile , " jmp_offsets[%d] ="
"%ld + (gen_code_ptr - gen_code_buf); \n " ,
2207
n , code_offset );
2208
2209
continue ;
}
ths
authored
18 years ago
2210
get_reloc_expr ( relname , sizeof ( relname ), sym_name );
2211
2212
2213
2214
2215
2216
2217
type = ELF64_R_TYPE ( rel -> r_info );
addend = rel -> r_addend ;
switch ( type ) {
case R_IA64_IMM64 :
fprintf ( outfile ,
" ia64_imm64(gen_code_ptr + %ld, "
"%s + %ld); \n " ,
ths
authored
18 years ago
2218
code_offset , relname , addend );
2219
2220
2221
2222
2223
break ;
case R_IA64_LTOFF22X :
case R_IA64_LTOFF22 :
fprintf ( outfile , " IA64_LTOFF(gen_code_ptr + %ld,"
" %s + %ld, %d); \n " ,
ths
authored
18 years ago
2224
code_offset , relname , addend ,
2225
2226
2227
2228
2229
( type == R_IA64_LTOFF22X ));
break ;
case R_IA64_LDXMOV :
fprintf ( outfile ,
" ia64_ldxmov(gen_code_ptr + %ld,"
ths
authored
18 years ago
2230
" %s + %ld); \n " , code_offset , relname , addend );
2231
2232
2233
2234
2235
2236
2237
2238
break ;
case R_IA64_PCREL21B :
if ( strstart ( sym_name , "__op_gen_label" , NULL )) {
fprintf ( outfile ,
" ia64_imm21b(gen_code_ptr + %ld,"
" (long) (%s + %ld - \n\t\t "
"((long) gen_code_ptr + %ld)) >> 4); \n " ,
ths
authored
18 years ago
2239
code_offset , relname , addend ,
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
code_offset & ~ 0xfUL );
} else {
fprintf ( outfile ,
" IA64_PLT(gen_code_ptr + %ld, "
"%d); \t /* %s + %ld */ \n " ,
code_offset ,
get_plt_index ( sym_name , addend ),
sym_name , addend );
}
break ;
default :
error ( "unsupported ia64 relocation (0x%x)" ,
type );
}
2254
}
2255
2256
fprintf ( outfile , " ia64_nop_b(gen_code_ptr + %d); \n " ,
copy_size - 16 + 2 );
2257
}
2258
2259
# elif defined ( HOST_SPARC )
{
ths
authored
18 years ago
2260
char relname [ 256 ];
2261
2262
int type ;
int addend ;
2263
int reloc_offset ;
2264
for ( i = 0 , rel = relocs ; i < nb_relocs ; i ++ , rel ++ ) {
2265
2266
if ( rel -> r_offset >= start_offset &&
rel -> r_offset < start_offset + copy_size ) {
2267
sym_name = strtab + symtab [ ELF32_R_SYM ( rel -> r_info )]. st_name ;
ths
authored
18 years ago
2268
get_reloc_expr ( relname , sizeof ( relname ), sym_name );
2269
2270
type = ELF32_R_TYPE ( rel -> r_info );
addend = rel -> r_addend ;
2271
reloc_offset = rel -> r_offset - start_offset ;
2272
2273
switch ( type ) {
case R_SPARC_32 :
ths
authored
18 years ago
2274
fprintf ( outfile , " *(uint32_t *)(gen_code_ptr + %d) = %s + %d; \n " ,
ths
authored
18 years ago
2275
reloc_offset , relname , addend );
2276
2277
2278
2279
2280
2281
break ;
case R_SPARC_HI22 :
fprintf ( outfile ,
" *(uint32_t *)(gen_code_ptr + %d) = "
"((*(uint32_t *)(gen_code_ptr + %d)) "
" & ~0x3fffff) "
2282
" | (((%s + %d) >> 10) & 0x3fffff); \n " ,
ths
authored
18 years ago
2283
reloc_offset , reloc_offset , relname , addend );
2284
2285
2286
2287
2288
2289
2290
break ;
case R_SPARC_LO10 :
fprintf ( outfile ,
" *(uint32_t *)(gen_code_ptr + %d) = "
"((*(uint32_t *)(gen_code_ptr + %d)) "
" & ~0x3ff) "
" | ((%s + %d) & 0x3ff); \n " ,
ths
authored
18 years ago
2291
reloc_offset , reloc_offset , relname , addend );
2292
2293
2294
2295
2296
2297
break ;
case R_SPARC_WDISP30 :
fprintf ( outfile ,
" *(uint32_t *)(gen_code_ptr + %d) = "
"((*(uint32_t *)(gen_code_ptr + %d)) "
" & ~0x3fffffff) "
2298
" | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
2299
" & 0x3fffffff); \n " ,
ths
authored
18 years ago
2300
reloc_offset , reloc_offset , relname , addend ,
2301
reloc_offset );
2302
break ;
2303
2304
2305
2306
2307
2308
2309
2310
2311
case R_SPARC_WDISP22 :
fprintf ( outfile ,
" *(uint32_t *)(gen_code_ptr + %d) = "
"((*(uint32_t *)(gen_code_ptr + %d)) "
" & ~0x3fffff) "
" | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
" & 0x3fffff); \n " ,
rel -> r_offset - start_offset ,
rel -> r_offset - start_offset ,
ths
authored
18 years ago
2312
relname , addend ,
2313
2314
rel -> r_offset - start_offset );
break ;
2315
2316
2317
2318
2319
2320
2321
2322
default :
error ( "unsupported sparc relocation (%d)" , type );
}
}
}
}
# elif defined ( HOST_SPARC64 )
{
ths
authored
18 years ago
2323
char relname [ 256 ];
2324
2325
int type ;
int addend ;
2326
int reloc_offset ;
2327
for ( i = 0 , rel = relocs ; i < nb_relocs ; i ++ , rel ++ ) {
2328
2329
if ( rel -> r_offset >= start_offset &&
rel -> r_offset < start_offset + copy_size ) {
2330
sym_name = strtab + symtab [ ELF64_R_SYM ( rel -> r_info )]. st_name ;
ths
authored
18 years ago
2331
get_reloc_expr ( relname , sizeof ( relname ), sym_name );
2332
type = ELF32_R_TYPE ( rel -> r_info );
2333
addend = rel -> r_addend ;
2334
reloc_offset = rel -> r_offset - start_offset ;
2335
2336
2337
switch ( type ) {
case R_SPARC_32 :
fprintf ( outfile , " *(uint32_t *)(gen_code_ptr + %d) = %s + %d; \n " ,
ths
authored
18 years ago
2338
reloc_offset , relname , addend );
2339
2340
2341
2342
2343
2344
break ;
case R_SPARC_HI22 :
fprintf ( outfile ,
" *(uint32_t *)(gen_code_ptr + %d) = "
"((*(uint32_t *)(gen_code_ptr + %d)) "
" & ~0x3fffff) "
2345
" | (((%s + %d) >> 10) & 0x3fffff); \n " ,
ths
authored
18 years ago
2346
reloc_offset , reloc_offset , relname , addend );
2347
2348
2349
2350
2351
2352
2353
break ;
case R_SPARC_LO10 :
fprintf ( outfile ,
" *(uint32_t *)(gen_code_ptr + %d) = "
"((*(uint32_t *)(gen_code_ptr + %d)) "
" & ~0x3ff) "
" | ((%s + %d) & 0x3ff); \n " ,
ths
authored
18 years ago
2354
reloc_offset , reloc_offset , relname , addend );
2355
break ;
2356
2357
2358
2359
2360
2361
2362
case R_SPARC_OLO10 :
addend += ELF64_R_TYPE_DATA ( rel -> r_info );
fprintf ( outfile ,
" *(uint32_t *)(gen_code_ptr + %d) = "
"((*(uint32_t *)(gen_code_ptr + %d)) "
" & ~0x3ff) "
" | ((%s + %d) & 0x3ff); \n " ,
ths
authored
18 years ago
2363
reloc_offset , reloc_offset , relname , addend );
2364
break ;
2365
2366
2367
2368
2369
case R_SPARC_WDISP30 :
fprintf ( outfile ,
" *(uint32_t *)(gen_code_ptr + %d) = "
"((*(uint32_t *)(gen_code_ptr + %d)) "
" & ~0x3fffffff) "
2370
" | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
2371
" & 0x3fffffff); \n " ,
ths
authored
18 years ago
2372
reloc_offset , reloc_offset , relname , addend ,
2373
reloc_offset );
2374
break ;
2375
2376
2377
2378
2379
2380
2381
case R_SPARC_WDISP22 :
fprintf ( outfile ,
" *(uint32_t *)(gen_code_ptr + %d) = "
"((*(uint32_t *)(gen_code_ptr + %d)) "
" & ~0x3fffff) "
" | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
" & 0x3fffff); \n " ,
ths
authored
18 years ago
2382
reloc_offset , reloc_offset , relname , addend ,
2383
2384
reloc_offset );
break ;
ths
authored
18 years ago
2385
2386
2387
2388
2389
2390
case R_SPARC_HH22 :
fprintf ( outfile ,
" *(uint32_t *)(gen_code_ptr + %d) = "
"((*(uint32_t *)(gen_code_ptr + %d)) "
" & ~0x00000000) "
" | (((%s + %d) >> 42) & 0x00000000); \n " ,
ths
authored
18 years ago
2391
reloc_offset , reloc_offset , relname , addend );
ths
authored
18 years ago
2392
2393
2394
2395
2396
2397
2398
2399
break ;
case R_SPARC_LM22 :
fprintf ( outfile ,
" *(uint32_t *)(gen_code_ptr + %d) = "
"((*(uint32_t *)(gen_code_ptr + %d)) "
" & ~0x00000000) "
" | (((%s + %d) >> 10) & 0x00000000); \n " ,
ths
authored
18 years ago
2400
reloc_offset , reloc_offset , relname , addend );
ths
authored
18 years ago
2401
2402
2403
2404
2405
2406
2407
2408
break ;
case R_SPARC_HM10 :
fprintf ( outfile ,
" *(uint32_t *)(gen_code_ptr + %d) = "
"((*(uint32_t *)(gen_code_ptr + %d)) "
" & ~0x00000000) "
" | ((((%s + %d) >> 32 & 0x3ff)) & 0x00000000); \n " ,
ths
authored
18 years ago
2409
reloc_offset , reloc_offset , relname , addend );
ths
authored
18 years ago
2410
2411
break ;
2412
default :
ths
authored
18 years ago
2413
error ( "unsupported sparc64 relocation (%d) for symbol %s" , type , relname );
2414
2415
2416
2417
}
}
}
}
2418
2419
# elif defined ( HOST_M68K )
{
ths
authored
18 years ago
2420
char relname [ 256 ];
2421
2422
int type ;
int addend ;
2423
int reloc_offset ;
2424
2425
2426
2427
2428
2429
Elf32_Sym * sym ;
for ( i = 0 , rel = relocs ; i < nb_relocs ; i ++ , rel ++ ) {
if ( rel -> r_offset >= start_offset &&
rel -> r_offset < start_offset + copy_size ) {
sym = & ( symtab [ ELFW ( R_SYM )( rel -> r_info )]);
sym_name = strtab + symtab [ ELFW ( R_SYM )( rel -> r_info )]. st_name ;
ths
authored
18 years ago
2430
get_reloc_expr ( relname , sizeof ( relname ), sym_name );
2431
2432
type = ELF32_R_TYPE ( rel -> r_info );
addend = get32 (( uint32_t * )( text + rel -> r_offset )) + rel -> r_addend ;
2433
reloc_offset = rel -> r_offset - start_offset ;
2434
2435
2436
switch ( type ) {
case R_68K_32 :
fprintf ( outfile , " /* R_68K_32 RELOC, offset %x */ \n " , rel -> r_offset ) ;
ths
authored
18 years ago
2437
fprintf ( outfile , " *(uint32_t *)(gen_code_ptr + %d) = %s + %#x; \n " ,
ths
authored
18 years ago
2438
reloc_offset , relname , addend );
2439
2440
2441
break ;
case R_68K_PC32 :
fprintf ( outfile , " /* R_68K_PC32 RELOC, offset %x */ \n " , rel -> r_offset );
ths
authored
18 years ago
2442
fprintf ( outfile , " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %#x) + %#x; \n " ,
ths
authored
18 years ago
2443
reloc_offset , relname , reloc_offset , /*sym->st_value+*/ addend );
2444
2445
2446
2447
2448
2449
break ;
default :
error ( "unsupported m68k relocation (%d)" , type );
}
}
}
2450
}
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
# elif defined ( HOST_HPPA )
{
char relname [ 256 ];
int type , is_label ;
int addend ;
int reloc_offset ;
for ( i = 0 , rel = relocs ; i < nb_relocs ; i ++ , rel ++ ) {
if ( rel -> r_offset >= start_offset &&
rel -> r_offset < start_offset + copy_size ) {
sym_name = get_rel_sym_name ( rel );
sym_name = strtab + symtab [ ELF32_R_SYM ( rel -> r_info )]. st_name ;
is_label = get_reloc_expr ( relname , sizeof ( relname ), sym_name );
type = ELF32_R_TYPE ( rel -> r_info );
addend = rel -> r_addend ;
reloc_offset = rel -> r_offset - start_offset ;
if ( is_label ) {
switch ( type ) {
case R_PARISC_PCREL17F :
fprintf ( outfile ,
" tcg_out_reloc(s, gen_code_ptr + %d, %d, %s, %d); \n " ,
reloc_offset , type , relname , addend );
break ;
default :
error ( "unsupported hppa label relocation (%d)" , type );
}
} else {
switch ( type ) {
case R_PARISC_DIR21L :
fprintf ( outfile ,
" hppa_patch21l((uint32_t *)(gen_code_ptr + %d), %s, %d); \n " ,
reloc_offset , relname , addend );
break ;
case R_PARISC_DIR14R :
fprintf ( outfile ,
" hppa_patch14r((uint32_t *)(gen_code_ptr + %d), %s, %d); \n " ,
reloc_offset , relname , addend );
break ;
case R_PARISC_PCREL17F :
if ( strstart ( sym_name , "__op_gen_label" , NULL )) {
fprintf ( outfile ,
" hppa_patch17f((uint32_t *)(gen_code_ptr + %d), %s, %d); \n " ,
reloc_offset , relname , addend );
} else {
fprintf ( outfile ,
" HPPA_RECORD_BRANCH(hppa_stubs, (uint32_t *)(gen_code_ptr + %d), %s); \n " ,
reloc_offset , relname );
}
break ;
case R_PARISC_DPREL21L :
if ( strstart ( sym_name , "__op_param" , & p ))
fprintf ( outfile ,
" hppa_load_imm21l((uint32_t *)(gen_code_ptr + %d), param%s, %d); \n " ,
reloc_offset , p , addend );
else
fprintf ( outfile ,
" hppa_patch21l_dprel((uint32_t *)(gen_code_ptr + %d), %s, %d); \n " ,
reloc_offset , relname , addend );
break ;
case R_PARISC_DPREL14R :
if ( strstart ( sym_name , "__op_param" , & p ))
fprintf ( outfile ,
" hppa_load_imm14r((uint32_t *)(gen_code_ptr + %d), param%s, %d); \n " ,
reloc_offset , p , addend );
else
fprintf ( outfile ,
" hppa_patch14r_dprel((uint32_t *)(gen_code_ptr + %d), %s, %d); \n " ,
reloc_offset , relname , addend );
break ;
default :
error ( "unsupported hppa relocation (%d)" , type );
}
}
}
}
}
ths
authored
18 years ago
2527
# elif defined ( HOST_MIPS ) || defined ( HOST_MIPS64 )
ths
authored
18 years ago
2528
2529
2530
{
for ( i = 0 , rel = relocs ; i < nb_relocs ; i ++ , rel ++ ) {
if ( rel -> r_offset >= start_offset && rel -> r_offset < start_offset + copy_size ) {
ths
authored
18 years ago
2531
char relname [ 256 ];
ths
authored
18 years ago
2532
2533
2534
2535
2536
2537
2538
2539
int type ;
int addend ;
int reloc_offset ;
sym_name = strtab + symtab [ ELF32_R_SYM ( rel -> r_info )]. st_name ;
/* the compiler leave some unnecessary references to the code */
if ( sym_name [ 0 ] == '\0' )
continue ;
ths
authored
18 years ago
2540
get_reloc_expr ( relname , sizeof ( relname ), sym_name );
ths
authored
18 years ago
2541
2542
2543
2544
type = ELF32_R_TYPE ( rel -> r_info );
addend = get32 (( uint32_t * )( text + rel -> r_offset ));
reloc_offset = rel -> r_offset - start_offset ;
switch ( type ) {
ths
authored
18 years ago
2545
2546
2547
2548
2549
2550
2551
2552
case R_MIPS_26 :
fprintf ( outfile , " /* R_MIPS_26 RELOC, offset 0x%x, name %s */ \n " ,
rel -> r_offset , sym_name );
fprintf ( outfile ,
" *(uint32_t *)(gen_code_ptr + 0x%x) = "
"(0x%x & ~0x3fffff) "
"| ((0x%x + ((%s - (*(uint32_t *)(gen_code_ptr + 0x%x))) >> 2)) "
" & 0x3fffff); \n " ,
ths
authored
18 years ago
2553
reloc_offset , addend , addend , relname , reloc_offset );
ths
authored
18 years ago
2554
break ;
ths
authored
18 years ago
2555
2556
2557
2558
2559
2560
2561
2562
case R_MIPS_HI16 :
fprintf ( outfile , " /* R_MIPS_HI16 RELOC, offset 0x%x, name %s */ \n " ,
rel -> r_offset , sym_name );
fprintf ( outfile ,
" *(uint32_t *)(gen_code_ptr + 0x%x) = "
"((*(uint32_t *)(gen_code_ptr + 0x%x)) "
" & ~0xffff) "
" | (((%s - 0x8000) >> 16) & 0xffff); \n " ,
ths
authored
18 years ago
2563
reloc_offset , reloc_offset , relname );
ths
authored
18 years ago
2564
2565
2566
2567
2568
2569
2570
2571
2572
break ;
case R_MIPS_LO16 :
fprintf ( outfile , " /* R_MIPS_LO16 RELOC, offset 0x%x, name %s */ \n " ,
rel -> r_offset , sym_name );
fprintf ( outfile ,
" *(uint32_t *)(gen_code_ptr + 0x%x) = "
"((*(uint32_t *)(gen_code_ptr + 0x%x)) "
" & ~0xffff) "
" | (%s & 0xffff); \n " ,
ths
authored
18 years ago
2573
reloc_offset , reloc_offset , relname );
ths
authored
18 years ago
2574
2575
2576
2577
2578
2579
2580
2581
2582
break ;
case R_MIPS_PC16 :
fprintf ( outfile , " /* R_MIPS_PC16 RELOC, offset 0x%x, name %s */ \n " ,
rel -> r_offset , sym_name );
fprintf ( outfile ,
" *(uint32_t *)(gen_code_ptr + 0x%x) = "
"(0x%x & ~0xffff) "
"| ((0x%x + ((%s - (*(uint32_t *)(gen_code_ptr + 0x%x))) >> 2)) "
" & 0xffff); \n " ,
ths
authored
18 years ago
2583
reloc_offset , addend , addend , relname , reloc_offset );
ths
authored
18 years ago
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
break ;
case R_MIPS_GOT16 :
case R_MIPS_CALL16 :
fprintf ( outfile , " /* R_MIPS_GOT16 RELOC, offset 0x%x, name %s */ \n " ,
rel -> r_offset , sym_name );
fprintf ( outfile ,
" *(uint32_t *)(gen_code_ptr + 0x%x) = "
"((*(uint32_t *)(gen_code_ptr + 0x%x)) "
" & ~0xffff) "
" | (((%s - 0x8000) >> 16) & 0xffff); \n " ,
ths
authored
18 years ago
2594
reloc_offset , reloc_offset , relname );
ths
authored
18 years ago
2595
2596
2597
2598
2599
2600
2601
break ;
default :
error ( "unsupported MIPS relocation (%d)" , type );
}
}
}
}
2602
2603
# elif defined ( HOST_ARM )
error ( "dyngen targets not supported on ARM" );
malc
authored
17 years ago
2604
2605
# elif defined ( HOST_PPC64 )
error ( "dyngen targets not supported on PPC64" );
2606
2607
2608
# else
# error unsupported CPU
# endif
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
fprintf ( outfile , " gen_code_ptr += %d; \n " , copy_size );
fprintf ( outfile , "} \n " );
fprintf ( outfile , "break; \n\n " );
} else {
fprintf ( outfile , "static inline void gen_%s(" , name );
if ( nb_args == 0 ) {
fprintf ( outfile , "void" );
} else {
for ( i = 0 ; i < nb_args ; i ++ ) {
if ( i != 0 )
fprintf ( outfile , ", " );
fprintf ( outfile , "long param%d" , i + 1 );
2621
2622
}
}
2623
2624
2625
2626
2627
2628
2629
fprintf ( outfile , ") \n " );
fprintf ( outfile , "{ \n " );
for ( i = 0 ; i < nb_args ; i ++ ) {
fprintf ( outfile , " *gen_opparam_ptr++ = param%d; \n " , i + 1 );
}
fprintf ( outfile , " *gen_opc_ptr++ = INDEX_%s; \n " , name );
fprintf ( outfile , "} \n\n " );
2630
2631
2632
}
}
2633
static int gen_file ( FILE * outfile , int out_type )
2634
{
2635
2636
int i ;
EXE_SYM * sym ;
2637
2638
if ( out_type == OUT_INDEX_OP ) {
2639
for ( i = 0 , sym = symtab ; i < nb_syms ; i ++ , sym ++ ) {
2640
const char * name ;
2641
name = get_sym_name ( sym );
2642
if ( strstart ( name , OP_PREFIX , NULL )) {
2643
gen_code ( name , sym -> st_value , sym -> st_size , outfile , 2 );
2644
2645
}
}
2646
2647
2648
2649
} else if ( out_type == OUT_GEN_OP ) {
/* generate gen_xxx functions */
for ( i = 0 , sym = symtab ; i < nb_syms ; i ++ , sym ++ ) {
const char * name ;
2650
name = get_sym_name ( sym );
2651
if ( strstart ( name , OP_PREFIX , NULL )) {
2652
# if defined ( CONFIG_FORMAT_ELF ) || defined ( CONFIG_FORMAT_COFF )
2653
if ( sym -> st_shndx != text_shndx )
2654
error ( "invalid section for opcode (0x%x)" , sym -> st_shndx );
2655
# endif
2656
gen_code ( name , sym -> st_value , sym -> st_size , outfile , 0 );
2657
2658
}
}
ths
authored
18 years ago
2659
2660
2661
} else {
/* generate big code generation switch */
2662
2663
# ifdef HOST_ARM
2664
error ( "dyngen targets not supported on ARM" );
2665
# endif
2666
# ifdef HOST_IA64
2667
# error broken
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
{
long addend , not_first = 0 ;
unsigned long sym_idx ;
int index , max_index ;
const char * sym_name ;
EXE_RELOC * rel ;
max_index = - 1 ;
for ( i = 0 , rel = relocs ; i < nb_relocs ; i ++ , rel ++ ) {
sym_idx = ELF64_R_SYM ( rel -> r_info );
sym_name = ( strtab + symtab [ sym_idx ]. st_name );
if ( strstart ( sym_name , "__op_gen_label" , NULL ))
continue ;
if ( ELF64_R_TYPE ( rel -> r_info ) != R_IA64_PCREL21B )
continue ;
addend = rel -> r_addend ;
index = get_plt_index ( sym_name , addend );
if ( index <= max_index )
continue ;
max_index = index ;
fprintf ( outfile , " extern void %s(void); \n " , sym_name );
}
fprintf ( outfile ,
" struct ia64_fixup *plt_fixes = NULL, "
"*ltoff_fixes = NULL; \n "
" static long plt_target[] = { \n\t " );
max_index = - 1 ;
for ( i = 0 , rel = relocs ; i < nb_relocs ; i ++ , rel ++ ) {
sym_idx = ELF64_R_SYM ( rel -> r_info );
sym_name = ( strtab + symtab [ sym_idx ]. st_name );
if ( strstart ( sym_name , "__op_gen_label" , NULL ))
continue ;
if ( ELF64_R_TYPE ( rel -> r_info ) != R_IA64_PCREL21B )
continue ;
addend = rel -> r_addend ;
index = get_plt_index ( sym_name , addend );
if ( index <= max_index )
continue ;
max_index = index ;
if ( not_first )
fprintf ( outfile , ", \n\t " );
not_first = 1 ;
if ( addend )
fprintf ( outfile , "(long) &%s + %ld" , sym_name , addend );
else
fprintf ( outfile , "(long) &%s" , sym_name );
}
fprintf ( outfile , " \n }; \n "
" unsigned int plt_offset[%u] = { 0 }; \n " , max_index + 1 );
}
# endif
2724
2725
2726
for ( i = 0 , sym = symtab ; i < nb_syms ; i ++ , sym ++ ) {
const char * name ;
2727
name = get_sym_name ( sym );
2728
if ( strstart ( name , OP_PREFIX , NULL )) {
2729
# if 0
ths
authored
18 years ago
2730
printf ( "%4d: %s pos=0x%08x len=%d \n " ,
2731
i , name , sym -> st_value , sym -> st_size );
2732
# endif
2733
# if defined ( CONFIG_FORMAT_ELF ) || defined ( CONFIG_FORMAT_COFF )
2734
if ( sym -> st_shndx != text_shndx )
2735
error ( "invalid section for opcode (0x%x)" , sym -> st_shndx );
2736
# endif
2737
gen_code ( name , sym -> st_value , sym -> st_size , outfile , 1 );
2738
2739
}
}
2740
2741
2742
2743
2744
}
return 0 ;
}
2745
static void usage ( void )
2746
2747
{
printf ( "dyngen (c) 2003 Fabrice Bellard \n "
2748
2749
2750
"usage: dyngen [-o outfile] [-c] objfile \n "
"Generate a dynamic code generator from an object file \n "
"-c output enum of operations \n "
2751
"-g output gen_op_xx() functions \n "
2752
);
2753
2754
2755
2756
2757
exit ( 1 );
}
int main ( int argc , char ** argv )
{
2758
int c , out_type ;
2759
2760
2761
2762
const char * filename , * outfilename ;
FILE * outfile ;
outfilename = "out.c" ;
2763
out_type = OUT_CODE ;
2764
for (;;) {
2765
c = getopt ( argc , argv , "ho:cg" );
2766
2767
2768
2769
2770
2771
2772
2773
2774
if ( c == - 1 )
break ;
switch ( c ) {
case 'h' :
usage ();
break ;
case 'o' :
outfilename = optarg ;
break ;
2775
case 'c' :
2776
2777
2778
2779
out_type = OUT_INDEX_OP ;
break ;
case 'g' :
out_type = OUT_GEN_OP ;
2780
break ;
2781
2782
2783
2784
2785
2786
2787
2788
}
}
if ( optind >= argc )
usage ();
filename = argv [ optind ];
outfile = fopen ( outfilename , "w" );
if ( ! outfile )
error ( "could not open '%s'" , outfilename );
2789
2790
2791
load_object ( filename );
gen_file ( outfile , out_type );
2792
2793
2794
fclose ( outfile );
return 0 ;
}