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/*
* Generic Dynamic compiler generator
*
* 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 02139, 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
#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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#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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#else
typedef int64_t host_long;
typedef uint64_t host_ulong;
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#define swabls(x) swab64s(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
#include "a.out.h"
typedef int32_t host_long;
typedef uint32_t host_ulong;
#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 {
char *n_name;
long n_strx;
} n_un;
unsigned char n_type;
unsigned char n_sect;
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;
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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void *load_data(int fd, long offset, unsigned int size)
{
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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int strstart(const char *str, const char *val, const char **ptr)
{
const char *p, *q;
p = str;
q = val;
while (*q != '\0') {
if (*p != *q)
return 0;
p++;
q++;
}
if (ptr)
*ptr = p;
return 1;
}
void pstrcpy(char *buf, int buf_size, const char *str)
{
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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void swab16s(uint16_t *p)
{
*p = bswap16(*p);
}
void swab32s(uint32_t *p)
{
*p = bswap32(*p);
}
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void swab64s(uint64_t *p)
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{
*p = bswap64(*p);
}
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uint16_t get16(uint16_t *p)
{
uint16_t val;
val = *p;
if (do_swap)
val = bswap16(val);
return val;
}
uint32_t get32(uint32_t *p)
{
uint32_t val;
val = *p;
if (do_swap)
val = bswap32(val);
return val;
}
void put16(uint16_t *p, uint16_t val)
{
if (do_swap)
val = bswap16(val);
*p = val;
}
void put32(uint32_t *p, uint32_t val)
{
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;
int elf_must_swap(struct elfhdr *h)
{
union {
uint32_t i;
uint8_t b[4];
} swaptest;
swaptest.i = 1;
return (h->e_ident[EI_DATA] == ELFDATA2MSB) !=
(swaptest.b[0] == 0);
}
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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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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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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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void elf_swap_rel(ELF_RELOC *rel)
{
swabls(&rel->r_offset);
swabls(&rel->r_info);
#ifdef ELF_USES_RELOCA
swabls(&rel->r_addend);
#endif
}
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struct elf_shdr *find_elf_section(struct elf_shdr *shdr, int shnum, const char *shstr,
const char *name)
{
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;
}
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];
if (sec->sh_type == SHT_RELOC && sec->sh_info == sh_index)
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 */
int load_object(const char *filename)
{
int fd;
struct elf_shdr *sec, *symtab_sec, *strtab_sec, *text_sec;
int i, j;
ElfW(Sym) *sym;
char *shstr;
ELF_RELOC *rel;
fd = open(filename, O_RDONLY);
if (fd < 0)
error("can't open file '%s'", filename);
/* 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);
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];
shstr = sdata[ehdr.e_shstrndx];
/* 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];
strtab = sdata[symtab_sec->sh_link];
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;
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';
}
|
|
605
606
|
}
|
|
607
|
char *name_for_dotdata(struct coff_rel *rel)
|
|
608
|
{
|
|
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
|
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) {
return sym->st_name;
}
}
return NULL;
|
|
625
626
|
}
|
|
627
|
static char *get_sym_name(EXE_SYM *sym)
|
|
628
|
{
|
|
629
|
return sym->st_name;
|
|
630
631
|
}
|
|
632
|
static char *get_rel_sym_name(EXE_RELOC *rel)
|
|
633
|
{
|
|
634
635
636
637
|
char *name;
name = get_sym_name(symtab + *(uint32_t *)(rel->r_reloc->r_symndx));
if (!strcmp(name, ".data"))
name = name_for_dotdata(rel);
|
|
638
639
|
if (name[0] == '.')
return NULL;
|
|
640
|
return name;
|
|
641
642
|
}
|
|
643
644
645
646
647
|
static host_ulong get_rel_offset(EXE_RELOC *rel)
{
return rel->r_offset;
}
|
|
648
|
struct external_scnhdr *find_coff_section(struct external_scnhdr *shdr, int shnum, const char *name)
|
|
649
650
651
|
{
int i;
const char *shname;
|
|
652
|
struct external_scnhdr *sec;
|
|
653
654
655
|
for(i = 0; i < shnum; i++) {
sec = &shdr[i];
|
|
656
|
if (!sec->s_name)
|
|
657
|
continue;
|
|
658
|
shname = sec->s_name;
|
|
659
660
661
662
663
664
|
if (!strcmp(shname, name))
return sec;
}
return NULL;
}
|
|
665
666
|
/* load a coff object file */
int load_object(const char *filename)
|
|
667
|
{
|
|
668
669
|
int fd;
struct external_scnhdr *sec, *text_sec, *data_sec;
|
|
670
|
int i;
|
|
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
|
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;
fd = open(filename, O_RDONLY
#ifdef _WIN32
| O_BINARY
#endif
);
if (fd < 0)
error("can't open file '%s'", filename);
/* Read COFF header. */
if (read(fd, &fhdr, sizeof (fhdr)) != sizeof (fhdr))
error("unable to read file header");
|
|
689
|
|
|
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
|
/* 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));
/* read all section data */
sdata = malloc(sizeof(void *) * fhdr.f_nscns);
memset(sdata, 0, sizeof(void *) * fhdr.f_nscns);
const char *p;
for(i = 0;i < fhdr.f_nscns; i++) {
|
|
705
|
sec = &shdr[i];
|
|
706
707
|
if (!strstart(sec->s_name, ".bss", &p))
sdata[i] = load_data(fd, sec->s_scnptr, sec->s_size);
|
|
708
709
|
}
|
|
710
|
|
|
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
|
/* 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;
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");
|
|
729
730
|
}
|
|
731
732
733
734
735
736
737
738
739
740
741
|
n_strtab = load_data(fd, (fhdr.f_symptr + fhdr.f_nsyms*SYMESZ), STRTAB_SIZE);
strtab = load_data(fd, (fhdr.f_symptr + fhdr.f_nsyms*SYMESZ), *n_strtab);
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;
|
|
742
|
}
|
|
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
|
/* set coff symbol */
symtab = malloc(sizeof(struct coff_sym) * nb_syms);
int aux_size, j;
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;
}
sym->st_type = ext_sym->e_type;
sym->st_shndx = ext_sym->e_scnum;
}
/* 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);
for (i = 0, ext_rel = coff_relocs, rel = relocs; i < nb_relocs;
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;
|
|
802
803
|
}
|
|
804
805
|
#endif /* CONFIG_FORMAT_COFF */
|
|
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
|
#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;
/* 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);
if ( sym->n_type & N_STAB ) /* Debug symbols are ignored */
return "debug";
if(!name)
return name;
if(name[0]=='_')
return name + 1;
else
return name;
}
/* find a section index given its segname, sectname */
static int find_mach_sec_index(struct section *section_hdr, int shnum, const char *segname,
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 */
struct section *find_mach_sec_hdr(struct section *section_hdr, int shnum, const char *segname,
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;
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;
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]);
}
}
/*
* Find symbol name given a (virtual) address, and a section which is of type
* 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;
/* Sanity check */
if(!( address >= sec_hdr->addr && address < (sec_hdr->addr + sec_hdr->size) ) )
return (char*)0;
if( sec_hdr->flags & S_SYMBOL_STUBS ){
size = sec_hdr->reserved2;
if(size == 0)
error("size = 0");
}
else if( sec_hdr->flags & S_LAZY_SYMBOL_POINTERS ||
sec_hdr->flags & S_NON_LAZY_SYMBOL_POINTERS)
size = sizeof(unsigned long);
else
return 0;
/* Compute our index in toc */
tocindex = (address - sec_hdr->addr)/size;
symindex = tocdylib[sec_hdr->reserved1 + tocindex];
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, §ion_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;
/* init the slide value */
*sslide = 0;
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 */
if ( symtab[rel->r_symbolnum].n_type & N_STAB )
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;
if(sectnum==0xffffff)
return 0;
/* Sanity Check */
if(sectnum > segment->nsects)
error("sectnum > segment->nsects");
switch(rel->r_type)
{
|
|
1001
|
case PPC_RELOC_LO16: fetch_next_pair_value(rel+1, &other_half); sectoffset |= (other_half << 16);
|
|
1002
|
break;
|
|
1003
|
case PPC_RELOC_HI16: fetch_next_pair_value(rel+1, &other_half); sectoffset = (sectoffset << 16) | (uint16_t)(other_half & 0xffff);
|
|
1004
|
break;
|
|
1005
|
case PPC_RELOC_HA16: fetch_next_pair_value(rel+1, &other_half); sectoffset = (sectoffset << 16) + (int16_t)(other_half & 0xffff);
|
|
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
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
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
|
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;
if (rel->r_type == PPC_RELOC_BR24)
name = (char *)find_reloc_name_in_sec_ptr((int)sectoffset, §ion_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);
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;
fd = open(filename, O_RDONLY);
if (fd < 0)
error("can't open file '%s'", filename);
/* 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");
}
if (mach_hdr.cputype != CPU_TYPE_POWERPC)
error("Unsupported CPU");
if (mach_hdr.filetype != MH_OBJECT)
error("Unsupported Mach Object");
/* 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);
/* 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);
}
/* 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];
/* Make sure dysym was loaded */
if(!(int)dysymtabcmd)
error("could not find __DYSYMTAB segment");
/* read the table of content of the indirect sym */
tocdylib = load_data( fd, dysymtabcmd->indirectsymoff, dysymtabcmd->nindirectsyms * sizeof(uint32_t) );
/* 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);
symtab = malloc(sizeof(EXE_SYM) * nb_syms);
/* 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));
|
|
1155
|
if ( syment->n_type & N_STAB ) /* Debug symbols are skipped */
|
|
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
|
continue;
memcpy(sym, syment, sizeof(*syment));
/* 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;
}
/* 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 */
|
|
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
|
void get_reloc_expr(char *name, int name_size, const char *sym_name)
{
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)) {
snprintf(name, name_size, "gen_labels[param%s]", p);
} else {
#ifdef HOST_SPARC
if (sym_name[0] == '.')
|
|
1199
|
snprintf(name, name_size,
|
|
1200
1201
1202
1203
1204
1205
1206
1207
|
"(long)(&__dot_%s)",
sym_name + 1);
else
#endif
snprintf(name, name_size, "(long)(&%s)", sym_name);
}
}
|
|
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
|
#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
|
|
1250
1251
1252
1253
1254
1255
1256
1257
|
#ifdef HOST_ARM
int arm_emit_ldr_info(const char *name, unsigned long start_offset,
FILE *outfile, uint8_t *p_start, uint8_t *p_end,
ELF_RELOC *relocs, int nb_relocs)
{
uint8_t *p;
uint32_t insn;
|
|
1258
|
int offset, min_offset, pc_offset, data_size, spare, max_pool;
|
|
1259
1260
|
uint8_t data_allocated[1024];
unsigned int data_index;
|
|
1261
|
int type;
|
|
1262
1263
1264
1265
1266
|
memset(data_allocated, 0, sizeof(data_allocated));
p = p_start;
min_offset = p_end - p_start;
|
|
1267
|
spare = 0x7fffffff;
|
|
1268
1269
|
while (p < p_start + min_offset) {
insn = get32((uint32_t *)p);
|
|
1270
1271
|
/* TODO: Armv5e ldrd. */
/* TODO: VFP load. */
|
|
1272
1273
1274
1275
|
if ((insn & 0x0d5f0000) == 0x051f0000) {
/* ldr reg, [pc, #im] */
offset = insn & 0xfff;
if (!(insn & 0x00800000))
|
|
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
|
offset = -offset;
max_pool = 4096;
type = 0;
} else if ((insn & 0x0e5f0f00) == 0x0c1f0100) {
/* FPA ldf. */
offset = (insn & 0xff) << 2;
if (!(insn & 0x00800000))
offset = -offset;
max_pool = 1024;
type = 1;
} else if ((insn & 0x0fff0000) == 0x028f0000) {
/* Some gcc load a doubleword immediate with
add regN, pc, #imm
ldmia regN, {regN, regM}
Hope and pray the compiler never generates somethin like
add reg, pc, #imm1; ldr reg, [reg, #-imm2]; */
int r;
r = (insn & 0xf00) >> 7;
offset = ((insn & 0xff) >> r) | ((insn & 0xff) << (32 - r));
max_pool = 1024;
type = 2;
} else {
max_pool = 0;
type = -1;
}
if (type >= 0) {
/* PC-relative load needs fixing up. */
if (spare > max_pool - offset)
spare = max_pool - offset;
|
|
1306
|
if ((offset & 3) !=0)
|
|
1307
1308
1309
1310
|
error("%s:%04x: pc offset must be 32 bit aligned",
name, start_offset + p - p_start);
if (offset < 0)
error("%s:%04x: Embedded literal value",
|
|
1311
1312
1313
1314
|
name, start_offset + p - p_start);
pc_offset = p - p_start + offset + 8;
if (pc_offset <= (p - p_start) ||
pc_offset >= (p_end - p_start))
|
|
1315
|
error("%s:%04x: pc offset must point inside the function code",
|
|
1316
1317
1318
1319
|
name, start_offset + p - p_start);
if (pc_offset < min_offset)
min_offset = pc_offset;
if (outfile) {
|
|
1320
|
/* The intruction position */
|
|
1321
1322
|
fprintf(outfile, " arm_ldr_ptr->ptr = gen_code_ptr + %d;\n",
p - p_start);
|
|
1323
1324
1325
|
/* The position of the constant pool data. */
data_index = ((p_end - p_start) - pc_offset) >> 2;
fprintf(outfile, " arm_ldr_ptr->data_ptr = arm_data_ptr - %d;\n",
|
|
1326
|
data_index);
|
|
1327
|
fprintf(outfile, " arm_ldr_ptr->type = %d;\n", type);
|
|
1328
1329
1330
1331
1332
|
fprintf(outfile, " arm_ldr_ptr++;\n");
}
}
p += 4;
}
|
|
1333
1334
|
/* Copy and relocate the constant pool data. */
|
|
1335
1336
|
data_size = (p_end - p_start) - min_offset;
if (data_size > 0 && outfile) {
|
|
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
|
spare += min_offset;
fprintf(outfile, " arm_data_ptr -= %d;\n", data_size >> 2);
fprintf(outfile, " arm_pool_ptr -= %d;\n", data_size);
fprintf(outfile, " if (arm_pool_ptr > gen_code_ptr + %d)\n"
" arm_pool_ptr = gen_code_ptr + %d;\n",
spare, spare);
data_index = 0;
for (pc_offset = min_offset;
pc_offset < p_end - p_start;
pc_offset += 4) {
ELF_RELOC *rel;
int i, addend, type;
const char *sym_name;
char relname[1024];
/* data value */
addend = get32((uint32_t *)(p_start + pc_offset));
relname[0] = '\0';
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
if (rel->r_offset == (pc_offset + start_offset)) {
sym_name = get_rel_sym_name(rel);
/* the compiler leave some unnecessary references to the code */
get_reloc_expr(relname, sizeof(relname), sym_name);
type = ELF32_R_TYPE(rel->r_info);
if (type != R_ARM_ABS32)
error("%s: unsupported data relocation", name);
break;
}
}
fprintf(outfile, " arm_data_ptr[%d] = 0x%x",
data_index, addend);
if (relname[0] != '\0')
fprintf(outfile, " + %s", relname);
fprintf(outfile, ";\n");
data_index++;
}
|
|
1376
1377
1378
1379
1380
1381
|
}
if (p == p_start)
goto arm_ret_error;
p -= 4;
insn = get32((uint32_t *)p);
|
|
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
|
/* The last instruction must be an ldm instruction. There are several
forms generated by gcc:
ldmib sp, {..., pc} (implies a sp adjustment of +4)
ldmia sp, {..., pc}
ldmea fp, {..., pc} */
if ((insn & 0xffff8000) == 0xe99d8000) {
if (outfile) {
fprintf(outfile,
" *(uint32_t *)(gen_code_ptr + %d) = 0xe28dd004;\n",
p - p_start);
}
p += 4;
} else if ((insn & 0xffff8000) != 0xe89d8000
&& (insn & 0xffff8000) != 0xe91b8000) {
|
|
1396
1397
1398
1399
|
arm_ret_error:
if (!outfile)
printf("%s: invalid epilog\n", name);
}
|
|
1400
|
return p - p_start;
|
|
1401
1402
1403
1404
|
}
#endif
|
|
1405
1406
1407
|
#define MAX_ARGS 3
/* generate op code */
|
|
1408
|
void gen_code(const char *name, host_ulong offset, host_ulong size,
|
|
1409
|
FILE *outfile, int gen_switch)
|
|
1410
1411
1412
|
{
int copy_size = 0;
uint8_t *p_start, *p_end;
|
|
1413
|
host_ulong start_offset;
|
|
1414
|
int nb_args, i, n;
|
|
1415
1416
|
uint8_t args_present[MAX_ARGS];
const char *sym_name, *p;
|
|
1417
|
EXE_RELOC *rel;
|
|
1418
|
|
|
1419
1420
1421
1422
1423
|
/* 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).
*/
|
|
1424
1425
|
p_start = text + offset;
p_end = p_start + size;
|
|
1426
|
start_offset = offset;
|
|
1427
|
#if defined(HOST_I386) || defined(HOST_X86_64)
|
|
1428
1429
1430
1431
1432
1433
1434
1435
1436
|
#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)
|
|
1437
|
error("ret or jmp expected at the end of %s", name);
|
|
1438
|
}
|
|
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
|
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);
|
|
1451
|
}
|
|
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
|
copy_size = len;
}
#endif
#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);
if (get16((uint16_t *)p) != 0x07fe && get16((uint16_t *)p) != 0x07f4)
error("br %%r14 expected at the end of %s", name);
copy_size = p - p_start;
}
#elif defined(HOST_ALPHA)
{
uint8_t *p;
p = p_end - 4;
|
|
1479
|
#if 0
|
|
1480
1481
1482
|
/* XXX: check why it occurs */
if (p == p_start)
error("empty code for %s", name);
|
|
1483
|
#endif
|
|
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
|
if (get32((uint32_t *)p) != 0x6bfa8001)
error("ret expected at the end of %s", name);
copy_size = p - p_start;
}
#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);
|
|
1498
|
copy_size = p_end - p_start;
|
|
1499
1500
1501
|
}
#elif defined(HOST_SPARC)
{
|
|
1502
1503
|
#define INSN_SAVE 0x9de3a000
#define INSN_RET 0x81c7e008
|
|
1504
|
#define INSN_RETL 0x81c3e008
|
|
1505
1506
1507
|
#define INSN_RESTORE 0x81e80000
#define INSN_RETURN 0x81cfe008
#define INSN_NOP 0x01000000
|
|
1508
1509
|
#define INSN_ADD_SP 0x9c03a000 // add %sp, nn, %sp
#define INSN_SUB_SP 0x9c23a000 // sub %sp, nn, %sp
|
|
1510
|
|
|
1511
1512
1513
1514
1515
1516
1517
1518
|
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));
|
|
1519
1520
|
if (((start_insn & ~0x1fff) == INSN_SAVE) ||
(start_insn & ~0x1fff) == INSN_ADD_SP) {
|
|
1521
1522
|
p_start += 0x4;
start_offset += 0x4;
|
|
1523
1524
1525
1526
|
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; */ ;
|
|
1527
1528
|
else if (end_insn1 == INSN_RETL && (end_insn2 & ~0x1fff) == INSN_SUB_SP)
/* SPARC v7: retl; sub %sp, nn, %sp; */ ;
|
|
1529
1530
|
else
|
|
1531
|
error("ret; restore; not found at end of %s", name);
|
|
1532
1533
|
} else if (end_insn1 == INSN_RETL && end_insn2 == INSN_NOP) {
;
|
|
1534
1535
1536
|
} else {
error("No save at the beginning of %s", name);
}
|
|
1537
|
#if 0
|
|
1538
1539
1540
|
/* Skip a preceeding nop, if present. */
if (p > p_start) {
skip_insn = get32((uint32_t *)(p - 0x4));
|
|
1541
|
if (skip_insn == INSN_NOP)
|
|
1542
1543
|
p -= 4;
}
|
|
1544
|
#endif
|
|
1545
1546
1547
1548
|
copy_size = p - p_start;
}
#elif defined(HOST_SPARC64)
{
|
|
1549
1550
1551
1552
1553
1554
1555
1556
1557
|
#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
|
|
1558
1559
1560
|
uint32_t start_insn, end_insn1, end_insn2, skip_insn;
uint8_t *p;
p = (void *)(p_end - 8);
|
|
1561
1562
|
#if 0
/* XXX: check why it occurs */
|
|
1563
1564
|
if (p <= p_start)
error("empty code for %s", name);
|
|
1565
|
#endif
|
|
1566
1567
1568
|
start_insn = get32((uint32_t *)(p_start + 0x0));
end_insn1 = get32((uint32_t *)(p + 0x0));
end_insn2 = get32((uint32_t *)(p + 0x4));
|
|
1569
1570
|
if (((start_insn & ~0x1fff) == INSN_SAVE) ||
(start_insn & ~0x1fff) == INSN_ADD_SP) {
|
|
1571
1572
|
p_start += 0x4;
start_offset += 0x4;
|
|
1573
1574
1575
1576
1577
1578
1579
1580
|
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
|
|
1581
|
error("ret; restore; not found at end of %s", name);
|
|
1582
1583
|
} else if (end_insn1 == INSN_RETL && end_insn2 == INSN_NOP) {
;
|
|
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
|
} else {
error("No save at the beginning of %s", name);
}
/* Skip a preceeding nop, if present. */
if (p > p_start) {
skip_insn = get32((uint32_t *)(p - 0x4));
if (skip_insn == 0x01000000)
p -= 4;
}
copy_size = p - p_start;
}
#elif defined(HOST_ARM)
{
|
|
1599
1600
|
uint32_t insn;
|
|
1601
1602
1603
1604
1605
1606
1607
1608
|
if ((p_end - p_start) <= 16)
error("%s: function too small", name);
if (get32((uint32_t *)p_start) != 0xe1a0c00d ||
(get32((uint32_t *)(p_start + 4)) & 0xffff0000) != 0xe92d0000 ||
get32((uint32_t *)(p_start + 8)) != 0xe24cb004)
error("%s: invalid prolog", name);
p_start += 12;
start_offset += 12;
|
|
1609
1610
1611
1612
1613
1614
|
insn = get32((uint32_t *)p_start);
if ((insn & 0xffffff00) == 0xe24dd000) {
/* Stack adjustment. Assume op uses the frame pointer. */
p_start -= 4;
start_offset -= 4;
}
|
|
1615
1616
|
copy_size = arm_emit_ldr_info(name, start_offset, NULL, p_start, p_end,
relocs, nb_relocs);
|
|
1617
|
}
|
|
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
|
#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) &&
(p>p_start))
p -= 2;
if (get16((uint16_t *)p) != 0x4e75)
error("rts expected at the end of %s", name);
copy_size = p - p_start;
}
#else
#error unsupported CPU
#endif
|
|
1635
1636
1637
1638
1639
|
/* compute the number of arguments by looking at the relocations */
for(i = 0;i < MAX_ARGS; i++)
args_present[i] = 0;
|
|
1640
|
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
|
|
1641
1642
1643
|
host_ulong offset = get_rel_offset(rel);
if (offset >= start_offset &&
offset < start_offset + (p_end - p_start)) {
|
|
1644
|
sym_name = get_rel_sym_name(rel);
|
|
1645
1646
|
if(!sym_name)
continue;
|
|
1647
1648
|
if (strstart(sym_name, "__op_param", &p) ||
strstart(sym_name, "__op_gen_label", &p)) {
|
|
1649
|
n = strtoul(p, NULL, 10);
|
|
1650
|
if (n > MAX_ARGS)
|
|
1651
1652
|
error("too many arguments in %s", name);
args_present[n - 1] = 1;
|
|
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
|
}
}
}
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);
}
|
|
1665
|
if (gen_switch == 2) {
|
|
1666
|
fprintf(outfile, "DEF(%s, %d, %d)\n", name + 3, nb_args, copy_size);
|
|
1667
|
} else if (gen_switch == 1) {
|
|
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
|
/* 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");
|
|
1679
|
}
|
|
1680
1681
1682
|
#if defined(HOST_IA64)
fprintf(outfile, " extern char %s;\n", name);
#else
|
|
1683
|
fprintf(outfile, " extern void %s();\n", name);
|
|
1684
|
#endif
|
|
1685
|
|
|
1686
|
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
|
|
1687
1688
1689
|
host_ulong offset = get_rel_offset(rel);
if (offset >= start_offset &&
offset < start_offset + (p_end - p_start)) {
|
|
1690
|
sym_name = get_rel_sym_name(rel);
|
|
1691
1692
|
if(!sym_name)
continue;
|
|
1693
1694
|
if (*sym_name &&
!strstart(sym_name, "__op_param", NULL) &&
|
|
1695
1696
|
!strstart(sym_name, "__op_jmp", NULL) &&
!strstart(sym_name, "__op_gen_label", NULL)) {
|
|
1697
1698
1699
1700
1701
1702
1703
1704
|
#if defined(HOST_SPARC)
if (sym_name[0] == '.') {
fprintf(outfile,
"extern char __dot_%s __asm__(\"%s\");\n",
sym_name+1, sym_name);
continue;
}
#endif
|
|
1705
|
#if defined(__APPLE__)
|
|
1706
1707
|
/* set __attribute((unused)) on darwin because we wan't to avoid warning when we don't use the symbol */
fprintf(outfile, "extern char %s __attribute__((unused));\n", sym_name);
|
|
1708
1709
1710
1711
1712
1713
1714
1715
1716
|
#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);
|
|
1717
|
#else
|
|
1718
|
fprintf(outfile, "extern char %s;\n", sym_name);
|
|
1719
|
#endif
|
|
1720
1721
1722
1723
|
}
}
}
|
|
1724
1725
|
fprintf(outfile, " memcpy(gen_code_ptr, (void *)((char *)&%s+%d), %d);\n",
name, (int)(start_offset - offset), copy_size);
|
|
1726
1727
1728
|
/* emit code offset information */
{
|
|
1729
|
EXE_SYM *sym;
|
|
1730
|
const char *sym_name, *p;
|
|
1731
|
unsigned long val;
|
|
1732
1733
1734
|
int n;
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
|
|
1735
|
sym_name = get_sym_name(sym);
|
|
1736
|
if (strstart(sym_name, "__op_label", &p)) {
|
|
1737
|
uint8_t *ptr;
|
|
1738
1739
|
unsigned long offset;
|
|
1740
1741
|
/* test if the variable refers to a label inside
the code we are generating */
|
|
1742
1743
1744
1745
1746
1747
1748
1749
|
#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;
}
|
|
1750
1751
1752
1753
|
#elif defined(CONFIG_FORMAT_MACH)
if(!sym->n_sect)
continue;
ptr = sdata[sym->n_sect-1];
|
|
1754
|
#else
|
|
1755
|
ptr = sdata[sym->st_shndx];
|
|
1756
|
#endif
|
|
1757
1758
1759
|
if (!ptr)
error("__op_labelN in invalid section");
offset = sym->st_value;
|
|
1760
1761
1762
|
#ifdef CONFIG_FORMAT_MACH
offset -= section_hdr[sym->n_sect-1].addr;
#endif
|
|
1763
|
val = *(unsigned long *)(ptr + offset);
|
|
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
|
#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) {
nb_relocs1 = shdr[reloc_shndx].sh_size /
shdr[reloc_shndx].sh_entsize;
rel = (ELF_RELOC *)sdata[reloc_shndx];
for(j = 0; j < nb_relocs1; j++) {
if (rel->r_offset == offset) {
|
|
1776
|
val = rel->r_addend;
|
|
1777
1778
1779
1780
1781
1782
1783
|
break;
}
rel++;
}
}
}
#endif
|
|
1784
|
if (val >= start_offset && val <= start_offset + copy_size) {
|
|
1785
|
n = strtol(p, NULL, 10);
|
|
1786
|
fprintf(outfile, " label_offsets[%d] = %ld + (gen_code_ptr - gen_code_buf);\n", n, (long)(val - start_offset));
|
|
1787
1788
1789
1790
1791
1792
|
}
}
}
}
/* load parameres in variables */
|
|
1793
1794
1795
1796
1797
|
for(i = 0; i < nb_args; i++) {
fprintf(outfile, " param%d = *opparam_ptr++;\n", i + 1);
}
/* patch relocations */
|
|
1798
|
#if defined(HOST_I386)
|
|
1799
1800
1801
|
{
char name[256];
int type;
|
|
1802
|
int addend;
|
|
1803
|
int reloc_offset;
|
|
1804
|
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
|
|
1805
1806
|
if (rel->r_offset >= start_offset &&
rel->r_offset < start_offset + copy_size) {
|
|
1807
|
sym_name = get_rel_sym_name(rel);
|
|
1808
1809
|
if (!sym_name)
continue;
|
|
1810
|
reloc_offset = rel->r_offset - start_offset;
|
|
1811
1812
1813
1814
1815
1816
1817
1818
|
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",
|
|
1819
|
n, reloc_offset);
|
|
1820
1821
|
continue;
}
|
|
1822
|
|
|
1823
|
get_reloc_expr(name, sizeof(name), sym_name);
|
|
1824
|
addend = get32((uint32_t *)(text + rel->r_offset));
|
|
1825
1826
|
#ifdef CONFIG_FORMAT_ELF
type = ELF32_R_TYPE(rel->r_info);
|
|
1827
1828
|
switch(type) {
case R_386_32:
|
|
1829
|
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
|
1830
|
reloc_offset, name, addend);
|
|
1831
1832
|
break;
case R_386_PC32:
|
|
1833
|
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
|
|
1834
|
reloc_offset, name, reloc_offset, addend);
|
|
1835
1836
1837
1838
|
break;
default:
error("unsupported i386 relocation (%d)", type);
}
|
|
1839
|
#elif defined(CONFIG_FORMAT_COFF)
|
|
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
|
{
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;
}
}
}
}
|
|
1853
1854
1855
1856
|
type = rel->r_type;
switch(type) {
case DIR32:
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
|
1857
|
reloc_offset, name, addend);
|
|
1858
1859
1860
|
break;
case DISP32:
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d -4;\n",
|
|
1861
|
reloc_offset, name, reloc_offset, addend);
|
|
1862
1863
1864
1865
1866
1867
1868
|
break;
default:
error("unsupported i386 relocation (%d)", type);
}
#else
#error unsupport object format
#endif
|
|
1869
|
}
|
|
1870
1871
|
}
}
|
|
1872
|
#elif defined(HOST_X86_64)
|
|
1873
1874
1875
1876
|
{
char name[256];
int type;
int addend;
|
|
1877
|
int reloc_offset;
|
|
1878
1879
1880
1881
|
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;
|
|
1882
|
get_reloc_expr(name, sizeof(name), sym_name);
|
|
1883
1884
|
type = ELF32_R_TYPE(rel->r_info);
addend = rel->r_addend;
|
|
1885
|
reloc_offset = rel->r_offset - start_offset;
|
|
1886
1887
1888
|
switch(type) {
case R_X86_64_32:
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (uint32_t)%s + %d;\n",
|
|
1889
|
reloc_offset, name, addend);
|
|
1890
1891
1892
|
break;
case R_X86_64_32S:
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (int32_t)%s + %d;\n",
|
|
1893
|
reloc_offset, name, addend);
|
|
1894
1895
1896
|
break;
case R_X86_64_PC32:
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
|
|
1897
|
reloc_offset, name, reloc_offset, addend);
|
|
1898
1899
|
break;
default:
|
|
1900
|
error("unsupported X86_64 relocation (%d)", type);
|
|
1901
1902
1903
1904
|
}
}
}
}
|
|
1905
|
#elif defined(HOST_PPC)
|
|
1906
|
{
|
|
1907
|
#ifdef CONFIG_FORMAT_ELF
|
|
1908
1909
|
char name[256];
int type;
|
|
1910
|
int addend;
|
|
1911
|
int reloc_offset;
|
|
1912
|
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
|
|
1913
1914
|
if (rel->r_offset >= start_offset &&
rel->r_offset < start_offset + copy_size) {
|
|
1915
|
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
|
|
1916
|
reloc_offset = rel->r_offset - start_offset;
|
|
1917
1918
1919
1920
1921
1922
1923
1924
|
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",
|
|
1925
|
n, reloc_offset);
|
|
1926
1927
1928
|
continue;
}
|
|
1929
|
get_reloc_expr(name, sizeof(name), sym_name);
|
|
1930
1931
1932
1933
|
type = ELF32_R_TYPE(rel->r_info);
addend = rel->r_addend;
switch(type) {
case R_PPC_ADDR32:
|
|
1934
|
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
|
1935
|
reloc_offset, name, addend);
|
|
1936
1937
|
break;
case R_PPC_ADDR16_LO:
|
|
1938
|
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d);\n",
|
|
1939
|
reloc_offset, name, addend);
|
|
1940
1941
|
break;
case R_PPC_ADDR16_HI:
|
|
1942
|
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d) >> 16;\n",
|
|
1943
|
reloc_offset, name, addend);
|
|
1944
1945
|
break;
case R_PPC_ADDR16_HA:
|
|
1946
|
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d + 0x8000) >> 16;\n",
|
|
1947
|
reloc_offset, name, addend);
|
|
1948
1949
1950
|
break;
case R_PPC_REL24:
/* warning: must be at 32 MB distancy */
|
|
1951
|
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | ((%s - (long)(gen_code_ptr + %d) + %d) & 0x03fffffc);\n",
|
|
1952
|
reloc_offset, reloc_offset, name, reloc_offset, addend);
|
|
1953
1954
1955
1956
1957
1958
|
break;
default:
error("unsupported powerpc relocation (%d)", type);
}
}
}
|
|
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
|
#elif defined(CONFIG_FORMAT_MACH)
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;
if (!(offset >= start_offset && offset < start_offset + size))
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 */
}
|
|
2014
2015
|
get_reloc_expr(final_sym_name, sizeof(final_sym_name),
sym_name);
|
|
2016
2017
|
switch(type) {
case PPC_RELOC_BR24:
|
|
2018
2019
2020
2021
|
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",
|
|
2022
|
slide, slide, name, sslide );
|
|
2023
2024
2025
2026
2027
|
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);
}
|
|
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
|
break;
case PPC_RELOC_HI16:
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d) >> 16;\n",
slide, final_sym_name, sslide);
break;
case PPC_RELOC_LO16:
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d);\n",
slide, final_sym_name, sslide);
break;
case PPC_RELOC_HA16:
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d + 0x8000) >> 16;\n",
slide, final_sym_name, sslide);
break;
default:
error("unsupported powerpc relocation (%d)", type);
}
}
#else
#error unsupport object format
#endif
|
|
2048
|
}
|
|
2049
|
#elif defined(HOST_S390)
|
|
2050
2051
2052
|
{
char name[256];
int type;
|
|
2053
|
int addend;
|
|
2054
|
int reloc_offset;
|
|
2055
|
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
|
|
2056
2057
|
if (rel->r_offset >= start_offset &&
rel->r_offset < start_offset + copy_size) {
|
|
2058
|
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
|
|
2059
|
get_reloc_expr(name, sizeof(name), sym_name);
|
|
2060
2061
|
type = ELF32_R_TYPE(rel->r_info);
addend = rel->r_addend;
|
|
2062
|
reloc_offset = rel->r_offset - start_offset;
|
|
2063
2064
|
switch(type) {
case R_390_32:
|
|
2065
|
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
|
2066
|
reloc_offset, name, addend);
|
|
2067
2068
|
break;
case R_390_16:
|
|
2069
|
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
|
2070
|
reloc_offset, name, addend);
|
|
2071
2072
|
break;
case R_390_8:
|
|
2073
|
fprintf(outfile, " *(uint8_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
|
2074
|
reloc_offset, name, addend);
|
|
2075
2076
2077
2078
2079
2080
2081
|
break;
default:
error("unsupported s390 relocation (%d)", type);
}
}
}
}
|
|
2082
2083
2084
|
#elif defined(HOST_ALPHA)
{
for (i = 0, rel = relocs; i < nb_relocs; i++, rel++) {
|
|
2085
|
if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) {
|
|
2086
|
int type;
|
|
2087
|
long reloc_offset;
|
|
2088
|
|
|
2089
|
type = ELF64_R_TYPE(rel->r_info);
|
|
2090
|
sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name;
|
|
2091
|
reloc_offset = rel->r_offset - start_offset;
|
|
2092
2093
|
switch (type) {
case R_ALPHA_GPDISP:
|
|
2094
2095
2096
|
/* 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",
|
|
2097
|
reloc_offset);
|
|
2098
|
fprintf(outfile, " immediate_lda(gen_code_ptr + %ld, gp);\n",
|
|
2099
|
reloc_offset + (int)rel->r_addend);
|
|
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
|
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:
|
|
2110
2111
2112
2113
2114
2115
2116
2117
2118
|
/* 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",
|
|
2119
|
reloc_offset, p);
|
|
2120
2121
2122
2123
|
break;
case R_ALPHA_GPRELLOW:
if (strstart(sym_name, "__op_param", &p))
fprintf(outfile, " immediate_lda(gen_code_ptr + %ld, param%s);\n",
|
|
2124
|
reloc_offset, p);
|
|
2125
2126
2127
2128
|
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. */
|
|
2129
|
fprintf(outfile, " fix_bsr(gen_code_ptr + %ld, (uint8_t *) &%s - (gen_code_ptr + %ld + 4) + 8);\n",
|
|
2130
|
reloc_offset, sym_name, reloc_offset);
|
|
2131
2132
2133
2134
2135
2136
2137
2138
2139
|
break;
default:
error("unsupported Alpha relocation (%d)", type);
}
}
}
}
#elif defined(HOST_IA64)
{
|
|
2140
2141
|
unsigned long sym_idx;
long code_offset;
|
|
2142
2143
|
char name[256];
int type;
|
|
2144
2145
|
long addend;
|
|
2146
|
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
|
|
2147
2148
2149
2150
2151
|
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);
|
|
2152
|
code_offset = rel->r_offset - start_offset;
|
|
2153
2154
2155
2156
2157
2158
2159
2160
2161
|
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",
|
|
2162
|
n, code_offset);
|
|
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
|
continue;
}
get_reloc_expr(name, sizeof(name), sym_name);
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",
code_offset, name, addend);
break;
case R_IA64_LTOFF22X:
case R_IA64_LTOFF22:
fprintf(outfile, " IA64_LTOFF(gen_code_ptr + %ld,"
" %s + %ld, %d);\n",
code_offset, name, addend,
(type == R_IA64_LTOFF22X));
break;
case R_IA64_LDXMOV:
fprintf(outfile,
" ia64_ldxmov(gen_code_ptr + %ld,"
" %s + %ld);\n", code_offset, name, addend);
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",
code_offset, name, addend,
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);
}
|
|
2209
|
}
|
|
2210
2211
|
fprintf(outfile, " ia64_nop_b(gen_code_ptr + %d);\n",
copy_size - 16 + 2);
|
|
2212
|
}
|
|
2213
2214
2215
2216
2217
|
#elif defined(HOST_SPARC)
{
char name[256];
int type;
int addend;
|
|
2218
|
int reloc_offset;
|
|
2219
|
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
|
|
2220
2221
|
if (rel->r_offset >= start_offset &&
rel->r_offset < start_offset + copy_size) {
|
|
2222
|
sym_name = strtab + symtab[ELF32_R_SYM(rel->r_info)].st_name;
|
|
2223
|
get_reloc_expr(name, sizeof(name), sym_name);
|
|
2224
2225
|
type = ELF32_R_TYPE(rel->r_info);
addend = rel->r_addend;
|
|
2226
|
reloc_offset = rel->r_offset - start_offset;
|
|
2227
2228
2229
|
switch(type) {
case R_SPARC_32:
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
|
2230
|
reloc_offset, name, addend);
|
|
2231
2232
2233
2234
2235
2236
|
break;
case R_SPARC_HI22:
fprintf(outfile,
" *(uint32_t *)(gen_code_ptr + %d) = "
"((*(uint32_t *)(gen_code_ptr + %d)) "
" & ~0x3fffff) "
|
|
2237
|
" | (((%s + %d) >> 10) & 0x3fffff);\n",
|
|
2238
|
reloc_offset, reloc_offset, name, addend);
|
|
2239
2240
2241
2242
2243
2244
2245
|
break;
case R_SPARC_LO10:
fprintf(outfile,
" *(uint32_t *)(gen_code_ptr + %d) = "
"((*(uint32_t *)(gen_code_ptr + %d)) "
" & ~0x3ff) "
" | ((%s + %d) & 0x3ff);\n",
|
|
2246
|
reloc_offset, reloc_offset, name, addend);
|
|
2247
2248
2249
2250
2251
2252
|
break;
case R_SPARC_WDISP30:
fprintf(outfile,
" *(uint32_t *)(gen_code_ptr + %d) = "
"((*(uint32_t *)(gen_code_ptr + %d)) "
" & ~0x3fffffff) "
|
|
2253
|
" | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
|
|
2254
|
" & 0x3fffffff);\n",
|
|
2255
2256
|
reloc_offset, reloc_offset, name, addend,
reloc_offset);
|
|
2257
|
break;
|
|
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
|
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,
name, addend,
rel->r_offset - start_offset);
break;
|
|
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
|
default:
error("unsupported sparc relocation (%d)", type);
}
}
}
}
#elif defined(HOST_SPARC64)
{
char name[256];
int type;
int addend;
|
|
2281
|
int reloc_offset;
|
|
2282
|
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
|
|
2283
2284
|
if (rel->r_offset >= start_offset &&
rel->r_offset < start_offset + copy_size) {
|
|
2285
|
sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name;
|
|
2286
|
get_reloc_expr(name, sizeof(name), sym_name);
|
|
2287
|
type = ELF32_R_TYPE(rel->r_info);
|
|
2288
|
addend = rel->r_addend;
|
|
2289
|
reloc_offset = rel->r_offset - start_offset;
|
|
2290
2291
2292
|
switch(type) {
case R_SPARC_32:
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
|
2293
|
reloc_offset, name, addend);
|
|
2294
2295
2296
2297
2298
2299
|
break;
case R_SPARC_HI22:
fprintf(outfile,
" *(uint32_t *)(gen_code_ptr + %d) = "
"((*(uint32_t *)(gen_code_ptr + %d)) "
" & ~0x3fffff) "
|
|
2300
|
" | (((%s + %d) >> 10) & 0x3fffff);\n",
|
|
2301
|
reloc_offset, reloc_offset, name, addend);
|
|
2302
2303
2304
2305
2306
2307
2308
|
break;
case R_SPARC_LO10:
fprintf(outfile,
" *(uint32_t *)(gen_code_ptr + %d) = "
"((*(uint32_t *)(gen_code_ptr + %d)) "
" & ~0x3ff) "
" | ((%s + %d) & 0x3ff);\n",
|
|
2309
|
reloc_offset, reloc_offset, name, addend);
|
|
2310
|
break;
|
|
2311
2312
2313
2314
2315
2316
2317
2318
2319
|
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",
reloc_offset, reloc_offset, name, addend);
break;
|
|
2320
2321
2322
2323
2324
|
case R_SPARC_WDISP30:
fprintf(outfile,
" *(uint32_t *)(gen_code_ptr + %d) = "
"((*(uint32_t *)(gen_code_ptr + %d)) "
" & ~0x3fffffff) "
|
|
2325
|
" | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
|
|
2326
|
" & 0x3fffffff);\n",
|
|
2327
2328
|
reloc_offset, reloc_offset, name, addend,
reloc_offset);
|
|
2329
|
break;
|
|
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
|
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",
reloc_offset, reloc_offset, name, addend,
reloc_offset);
break;
|
|
2340
|
default:
|
|
2341
|
error("unsupported sparc64 relocation (%d) for symbol %s", type, name);
|
|
2342
2343
2344
2345
|
}
}
}
}
|
|
2346
2347
2348
2349
2350
|
#elif defined(HOST_ARM)
{
char name[256];
int type;
int addend;
|
|
2351
|
int reloc_offset;
|
|
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
|
uint32_t insn;
insn = get32((uint32_t *)(p_start + 4));
/* If prologue ends in sub sp, sp, #const then assume
op has a stack frame and needs the frame pointer. */
if ((insn & 0xffffff00) == 0xe24dd000) {
int i;
uint32_t opcode;
opcode = 0xe28db000; /* add fp, sp, #0. */
#if 0
/* ??? Need to undo the extra stack adjustment at the end of the op.
For now just leave the stack misaligned and hope it doesn't break anything
too important. */
if ((insn & 4) != 0) {
/* Preserve doubleword stack alignment. */
fprintf(outfile,
" *(uint32_t *)(gen_code_ptr + 4)= 0x%x;\n",
insn + 4);
opcode -= 4;
}
#endif
insn = get32((uint32_t *)(p_start - 4));
/* Calculate the size of the saved registers,
excluding pc. */
for (i = 0; i < 15; i++) {
if (insn & (1 << i))
opcode += 4;
}
fprintf(outfile,
" *(uint32_t *)gen_code_ptr = 0x%x;\n", opcode);
}
|
|
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
|
arm_emit_ldr_info(name, start_offset, outfile, p_start, p_end,
relocs, nb_relocs);
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;
/* the compiler leave some unnecessary references to the code */
if (sym_name[0] == '\0')
continue;
|
|
2393
|
get_reloc_expr(name, sizeof(name), sym_name);
|
|
2394
2395
|
type = ELF32_R_TYPE(rel->r_info);
addend = get32((uint32_t *)(text + rel->r_offset));
|
|
2396
|
reloc_offset = rel->r_offset - start_offset;
|
|
2397
2398
2399
|
switch(type) {
case R_ARM_ABS32:
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
|
2400
|
reloc_offset, name, addend);
|
|
2401
2402
|
break;
case R_ARM_PC24:
|
|
2403
2404
|
case R_ARM_JUMP24:
case R_ARM_CALL:
|
|
2405
|
fprintf(outfile, " arm_reloc_pc24((uint32_t *)(gen_code_ptr + %d), 0x%x, %s);\n",
|
|
2406
|
reloc_offset, addend, name);
|
|
2407
2408
2409
2410
2411
2412
|
break;
default:
error("unsupported arm relocation (%d)", type);
}
}
}
|
|
2413
2414
2415
2416
2417
2418
|
}
#elif defined(HOST_M68K)
{
char name[256];
int type;
int addend;
|
|
2419
|
int reloc_offset;
|
|
2420
2421
2422
2423
2424
2425
|
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;
|
|
2426
|
get_reloc_expr(name, sizeof(name), sym_name);
|
|
2427
2428
|
type = ELF32_R_TYPE(rel->r_info);
addend = get32((uint32_t *)(text + rel->r_offset)) + rel->r_addend;
|
|
2429
|
reloc_offset = rel->r_offset - start_offset;
|
|
2430
2431
2432
2433
|
switch(type) {
case R_68K_32:
fprintf(outfile, " /* R_68K_32 RELOC, offset %x */\n", rel->r_offset) ;
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %#x;\n",
|
|
2434
|
reloc_offset, name, addend );
|
|
2435
2436
2437
2438
|
break;
case R_68K_PC32:
fprintf(outfile, " /* R_68K_PC32 RELOC, offset %x */\n", rel->r_offset);
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %#x) + %#x;\n",
|
|
2439
|
reloc_offset, name, reloc_offset, /*sym->st_value+*/ addend);
|
|
2440
2441
2442
2443
2444
2445
|
break;
default:
error("unsupported m68k relocation (%d)", type);
}
}
}
|
|
2446
|
}
|
|
2447
2448
2449
|
#else
#error unsupported CPU
#endif
|
|
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
|
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);
|
|
2462
2463
|
}
}
|
|
2464
2465
2466
2467
2468
2469
2470
|
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");
|
|
2471
2472
2473
|
}
}
|
|
2474
|
int gen_file(FILE *outfile, int out_type)
|
|
2475
|
{
|
|
2476
2477
|
int i;
EXE_SYM *sym;
|
|
2478
|
|
|
2479
|
if (out_type == OUT_INDEX_OP) {
|
|
2480
|
fprintf(outfile, "DEF(end, 0, 0)\n");
|
|
2481
2482
2483
2484
|
fprintf(outfile, "DEF(nop, 0, 0)\n");
fprintf(outfile, "DEF(nop1, 1, 0)\n");
fprintf(outfile, "DEF(nop2, 2, 0)\n");
fprintf(outfile, "DEF(nop3, 3, 0)\n");
|
|
2485
|
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
|
|
2486
|
const char *name;
|
|
2487
|
name = get_sym_name(sym);
|
|
2488
|
if (strstart(name, OP_PREFIX, NULL)) {
|
|
2489
|
gen_code(name, sym->st_value, sym->st_size, outfile, 2);
|
|
2490
2491
|
}
}
|
|
2492
2493
|
} else if (out_type == OUT_GEN_OP) {
/* generate gen_xxx functions */
|
|
2494
|
fprintf(outfile, "#include \"dyngen-op.h\"\n");
|
|
2495
2496
|
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
const char *name;
|
|
2497
|
name = get_sym_name(sym);
|
|
2498
|
if (strstart(name, OP_PREFIX, NULL)) {
|
|
2499
|
#if defined(CONFIG_FORMAT_ELF) || defined(CONFIG_FORMAT_COFF)
|
|
2500
|
if (sym->st_shndx != text_shndx)
|
|
2501
|
error("invalid section for opcode (0x%x)", sym->st_shndx);
|
|
2502
|
#endif
|
|
2503
|
gen_code(name, sym->st_value, sym->st_size, outfile, 0);
|
|
2504
2505
2506
|
}
}
|
|
2507
2508
|
} else {
/* generate big code generation switch */
|
|
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
|
#ifdef HOST_ARM
/* We need to know the size of all the ops so we can figure out when
to emit constant pools. This must be consistent with opc.h. */
fprintf(outfile,
"static const uint32_t arm_opc_size[] = {\n"
" 0,\n" /* end */
" 0,\n" /* nop */
" 0,\n" /* nop1 */
" 0,\n" /* nop2 */
" 0,\n"); /* nop3 */
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
const char *name;
name = get_sym_name(sym);
if (strstart(name, OP_PREFIX, NULL)) {
fprintf(outfile, " %d,\n", sym->st_size);
}
}
fprintf(outfile,
"};\n");
#endif
|
|
2531
2532
|
fprintf(outfile,
"int dyngen_code(uint8_t *gen_code_buf,\n"
|
|
2533
|
" uint16_t *label_offsets, uint16_t *jmp_offsets,\n"
|
|
2534
|
" const uint16_t *opc_buf, const uint32_t *opparam_buf, const long *gen_labels)\n"
|
|
2535
2536
2537
|
"{\n"
" uint8_t *gen_code_ptr;\n"
" const uint16_t *opc_ptr;\n"
|
|
2538
2539
2540
|
" const uint32_t *opparam_ptr;\n");
#ifdef HOST_ARM
|
|
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
|
/* Arm is tricky because it uses constant pools for loading immediate values.
We assume (and require) each function is code followed by a constant pool.
All the ops are small so this should be ok. For each op we figure
out how much "spare" range we have in the load instructions. This allows
us to insert subsequent ops in between the op and the constant pool,
eliminating the neeed to jump around the pool.
We currently generate:
[ For this example we assume merging would move op1_pool out of range.
In practice we should be able to combine many ops before the offset
limits are reached. ]
op1_code;
op2_code;
goto op3;
op2_pool;
op1_pool;
op3:
op3_code;
ret;
op3_pool;
Ideally we'd put op1_pool before op2_pool, but that requires two passes.
*/
|
|
2565
2566
2567
|
fprintf(outfile,
" uint8_t *last_gen_code_ptr = gen_code_buf;\n"
" LDREntry *arm_ldr_ptr = arm_ldr_table;\n"
|
|
2568
2569
2570
|
" uint32_t *arm_data_ptr = arm_data_table + ARM_LDR_TABLE_SIZE;\n"
/* Initialise the parmissible pool offset to an arbitary large value. */
" uint8_t *arm_pool_ptr = gen_code_buf + 0x1000000;\n");
|
|
2571
|
#endif
|
|
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
|
#ifdef HOST_IA64
{
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
|
|
2629
2630
2631
|
fprintf(outfile,
"\n"
|
|
2632
2633
|
" gen_code_ptr = gen_code_buf;\n"
" opc_ptr = opc_buf;\n"
|
|
2634
2635
2636
2637
2638
|
" opparam_ptr = opparam_buf;\n");
/* Generate prologue, if needed. */
fprintf(outfile,
|
|
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
|
" for(;;) {\n");
#ifdef HOST_ARM
/* Generate constant pool if needed */
fprintf(outfile,
" if (gen_code_ptr + arm_opc_size[*opc_ptr] >= arm_pool_ptr) {\n"
" gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, "
"arm_ldr_ptr, arm_data_ptr, arm_data_table + ARM_LDR_TABLE_SIZE, 1);\n"
" last_gen_code_ptr = gen_code_ptr;\n"
" arm_ldr_ptr = arm_ldr_table;\n"
" arm_data_ptr = arm_data_table + ARM_LDR_TABLE_SIZE;\n"
" arm_pool_ptr = gen_code_ptr + 0x1000000;\n"
" }\n");
#endif
fprintf(outfile,
" switch(*opc_ptr++) {\n");
|
|
2656
|
|
|
2657
2658
|
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
const char *name;
|
|
2659
|
name = get_sym_name(sym);
|
|
2660
|
if (strstart(name, OP_PREFIX, NULL)) {
|
|
2661
|
#if 0
|
|
2662
2663
|
printf("%4d: %s pos=0x%08x len=%d\n",
i, name, sym->st_value, sym->st_size);
|
|
2664
|
#endif
|
|
2665
|
#if defined(CONFIG_FORMAT_ELF) || defined(CONFIG_FORMAT_COFF)
|
|
2666
|
if (sym->st_shndx != text_shndx)
|
|
2667
|
error("invalid section for opcode (0x%x)", sym->st_shndx);
|
|
2668
|
#endif
|
|
2669
|
gen_code(name, sym->st_value, sym->st_size, outfile, 1);
|
|
2670
2671
2672
2673
|
}
}
fprintf(outfile,
|
|
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
|
" case INDEX_op_nop:\n"
" break;\n"
" case INDEX_op_nop1:\n"
" opparam_ptr++;\n"
" break;\n"
" case INDEX_op_nop2:\n"
" opparam_ptr += 2;\n"
" break;\n"
" case INDEX_op_nop3:\n"
" opparam_ptr += 3;\n"
" break;\n"
|
|
2685
2686
|
" default:\n"
" goto the_end;\n"
|
|
2687
2688
2689
2690
|
" }\n");
fprintf(outfile,
|
|
2691
2692
2693
|
" }\n"
" the_end:\n"
);
|
|
2694
2695
|
#ifdef HOST_IA64
fprintf(outfile,
|
|
2696
2697
2698
|
" {\n"
" extern char code_gen_buffer[];\n"
" ia64_apply_fixes(&gen_code_ptr, ltoff_fixes, "
|
|
2699
2700
|
"(uint64_t) code_gen_buffer + 2*(1<<20), plt_fixes,\n\t\t\t"
"sizeof(plt_target)/sizeof(plt_target[0]),\n\t\t\t"
|
|
2701
|
"plt_target, plt_offset);\n }\n");
|
|
2702
|
#endif
|
|
2703
|
|
|
2704
2705
|
/* generate some code patching */
#ifdef HOST_ARM
|
|
2706
2707
2708
2709
|
fprintf(outfile,
"if (arm_data_ptr != arm_data_table + ARM_LDR_TABLE_SIZE)\n"
" gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, "
"arm_ldr_ptr, arm_data_ptr, arm_data_table + ARM_LDR_TABLE_SIZE, 0);\n");
|
|
2710
|
#endif
|
|
2711
2712
2713
|
/* flush instruction cache */
fprintf(outfile, "flush_icache_range((unsigned long)gen_code_buf, (unsigned long)gen_code_ptr);\n");
|
|
2714
2715
2716
|
fprintf(outfile, "return gen_code_ptr - gen_code_buf;\n");
fprintf(outfile, "}\n\n");
|
|
2717
2718
2719
2720
2721
2722
2723
2724
|
}
return 0;
}
void usage(void)
{
printf("dyngen (c) 2003 Fabrice Bellard\n"
|
|
2725
2726
2727
|
"usage: dyngen [-o outfile] [-c] objfile\n"
"Generate a dynamic code generator from an object file\n"
"-c output enum of operations\n"
|
|
2728
|
"-g output gen_op_xx() functions\n"
|
|
2729
|
);
|
|
2730
2731
2732
2733
2734
|
exit(1);
}
int main(int argc, char **argv)
{
|
|
2735
|
int c, out_type;
|
|
2736
2737
2738
2739
|
const char *filename, *outfilename;
FILE *outfile;
outfilename = "out.c";
|
|
2740
|
out_type = OUT_CODE;
|
|
2741
|
for(;;) {
|
|
2742
|
c = getopt(argc, argv, "ho:cg");
|
|
2743
2744
2745
2746
2747
2748
2749
2750
2751
|
if (c == -1)
break;
switch(c) {
case 'h':
usage();
break;
case 'o':
outfilename = optarg;
break;
|
|
2752
|
case 'c':
|
|
2753
2754
2755
2756
|
out_type = OUT_INDEX_OP;
break;
case 'g':
out_type = OUT_GEN_OP;
|
|
2757
|
break;
|
|
2758
2759
2760
2761
2762
2763
2764
2765
|
}
}
if (optind >= argc)
usage();
filename = argv[optind];
outfile = fopen(outfilename, "w");
if (!outfile)
error("could not open '%s'", outfilename);
|
|
2766
2767
2768
|
load_object(filename);
gen_file(outfile, out_type);
|
|
2769
2770
2771
|
fclose(outfile);
return 0;
}
|