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/* General "disassemble this chunk" code. Used for debugging. */
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#include "config.h"
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#include "dis-asm.h"
#include "elf.h"
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#include <errno.h>
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#include "cpu.h"
#include "exec-all.h"
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#include "disas.h"
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/* Filled in by elfload.c. Simplistic, but will do for now. */
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struct syminfo *syminfos = NULL;
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/* Get LENGTH bytes from info's buffer, at target address memaddr.
Transfer them to myaddr. */
int
buffer_read_memory (memaddr, myaddr, length, info)
bfd_vma memaddr;
bfd_byte *myaddr;
int length;
struct disassemble_info *info;
{
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if (memaddr < info->buffer_vma
|| memaddr + length > info->buffer_vma + info->buffer_length)
/* Out of bounds. Use EIO because GDB uses it. */
return EIO;
memcpy (myaddr, info->buffer + (memaddr - info->buffer_vma), length);
return 0;
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}
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/* Get LENGTH bytes from info's buffer, at target address memaddr.
Transfer them to myaddr. */
static int
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target_read_memory (bfd_vma memaddr,
bfd_byte *myaddr,
int length,
struct disassemble_info *info)
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{
int i;
for(i = 0; i < length; i++) {
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myaddr[i] = ldub_code(memaddr + i);
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}
return 0;
}
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/* Print an error message. We can assume that this is in response to
an error return from buffer_read_memory. */
void
perror_memory (status, memaddr, info)
int status;
bfd_vma memaddr;
struct disassemble_info *info;
{
if (status != EIO)
/* Can't happen. */
(*info->fprintf_func) (info->stream, "Unknown error %d\n", status);
else
/* Actually, address between memaddr and memaddr + len was
out of bounds. */
(*info->fprintf_func) (info->stream,
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"Address 0x%" PRIx64 " is out of bounds.\n", memaddr);
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}
/* This could be in a separate file, to save miniscule amounts of space
in statically linked executables. */
/* Just print the address is hex. This is included for completeness even
though both GDB and objdump provide their own (to print symbolic
addresses). */
void
generic_print_address (addr, info)
bfd_vma addr;
struct disassemble_info *info;
{
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(*info->fprintf_func) (info->stream, "0x%" PRIx64, addr);
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}
/* Just return the given address. */
int
generic_symbol_at_address (addr, info)
bfd_vma addr;
struct disassemble_info * info;
{
return 1;
}
bfd_vma bfd_getl32 (const bfd_byte *addr)
{
unsigned long v;
v = (unsigned long) addr[0];
v |= (unsigned long) addr[1] << 8;
v |= (unsigned long) addr[2] << 16;
v |= (unsigned long) addr[3] << 24;
return (bfd_vma) v;
}
bfd_vma bfd_getb32 (const bfd_byte *addr)
{
unsigned long v;
v = (unsigned long) addr[0] << 24;
v |= (unsigned long) addr[1] << 16;
v |= (unsigned long) addr[2] << 8;
v |= (unsigned long) addr[3];
return (bfd_vma) v;
}
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bfd_vma bfd_getl16 (const bfd_byte *addr)
{
unsigned long v;
v = (unsigned long) addr[0];
v |= (unsigned long) addr[1] << 8;
return (bfd_vma) v;
}
bfd_vma bfd_getb16 (const bfd_byte *addr)
{
unsigned long v;
v = (unsigned long) addr[0] << 24;
v |= (unsigned long) addr[1] << 16;
return (bfd_vma) v;
}
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#ifdef TARGET_ARM
static int
print_insn_thumb1(bfd_vma pc, disassemble_info *info)
{
return print_insn_arm(pc | 1, info);
}
#endif
/* Disassemble this for me please... (debugging). 'flags' has teh following
values:
i386 - nonzero means 16 bit code
arm - nonzero means thumb code
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ppc - nonzero means little endian
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other targets - unused
*/
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void target_disas(FILE *out, target_ulong code, target_ulong size, int flags)
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{
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target_ulong pc;
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int count;
struct disassemble_info disasm_info;
int (*print_insn)(bfd_vma pc, disassemble_info *info);
INIT_DISASSEMBLE_INFO(disasm_info, out, fprintf);
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disasm_info.read_memory_func = target_read_memory;
disasm_info.buffer_vma = code;
disasm_info.buffer_length = size;
#ifdef TARGET_WORDS_BIGENDIAN
disasm_info.endian = BFD_ENDIAN_BIG;
#else
disasm_info.endian = BFD_ENDIAN_LITTLE;
#endif
#if defined(TARGET_I386)
if (flags == 2)
disasm_info.mach = bfd_mach_x86_64;
else if (flags == 1)
disasm_info.mach = bfd_mach_i386_i8086;
else
disasm_info.mach = bfd_mach_i386_i386;
print_insn = print_insn_i386;
#elif defined(TARGET_ARM)
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if (flags)
print_insn = print_insn_thumb1;
else
print_insn = print_insn_arm;
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#elif defined(TARGET_SPARC)
print_insn = print_insn_sparc;
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#ifdef TARGET_SPARC64
disasm_info.mach = bfd_mach_sparc_v9b;
#endif
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#elif defined(TARGET_PPC)
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if (flags)
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disasm_info.endian = BFD_ENDIAN_LITTLE;
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#ifdef TARGET_PPC64
disasm_info.mach = bfd_mach_ppc64;
#else
disasm_info.mach = bfd_mach_ppc;
#endif
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print_insn = print_insn_ppc;
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#elif defined(TARGET_M68K)
print_insn = print_insn_m68k;
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#elif defined(TARGET_MIPS)
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#ifdef TARGET_WORDS_BIGENDIAN
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print_insn = print_insn_big_mips;
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#else
print_insn = print_insn_little_mips;
#endif
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#elif defined(TARGET_M68K)
print_insn = print_insn_m68k;
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#elif defined(TARGET_SH4)
disasm_info.mach = bfd_mach_sh4;
print_insn = print_insn_sh;
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#else
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fprintf(out, "0x" TARGET_FMT_lx
": Asm output not supported on this arch\n", code);
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return;
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#endif
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for (pc = code; pc < code + size; pc += count) {
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fprintf(out, "0x" TARGET_FMT_lx ": ", pc);
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count = print_insn(pc, &disasm_info);
#if 0
{
int i;
uint8_t b;
fprintf(out, " {");
for(i = 0; i < count; i++) {
target_read_memory(pc + i, &b, 1, &disasm_info);
fprintf(out, " %02x", b);
}
fprintf(out, " }");
}
#endif
fprintf(out, "\n");
if (count < 0)
break;
}
}
/* Disassemble this for me please... (debugging). */
void disas(FILE *out, void *code, unsigned long size)
{
unsigned long pc;
int count;
struct disassemble_info disasm_info;
int (*print_insn)(bfd_vma pc, disassemble_info *info);
INIT_DISASSEMBLE_INFO(disasm_info, out, fprintf);
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disasm_info.buffer = code;
disasm_info.buffer_vma = (unsigned long)code;
disasm_info.buffer_length = size;
#ifdef WORDS_BIGENDIAN
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disasm_info.endian = BFD_ENDIAN_BIG;
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#else
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disasm_info.endian = BFD_ENDIAN_LITTLE;
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#endif
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#if defined(__i386__)
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disasm_info.mach = bfd_mach_i386_i386;
print_insn = print_insn_i386;
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#elif defined(__x86_64__)
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disasm_info.mach = bfd_mach_x86_64;
print_insn = print_insn_i386;
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#elif defined(__powerpc__)
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print_insn = print_insn_ppc;
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#elif defined(__alpha__)
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print_insn = print_insn_alpha;
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#elif defined(__sparc__)
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print_insn = print_insn_sparc;
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#elif defined(__arm__)
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print_insn = print_insn_arm;
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#elif defined(__MIPSEB__)
print_insn = print_insn_big_mips;
#elif defined(__MIPSEL__)
print_insn = print_insn_little_mips;
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#elif defined(__m68k__)
print_insn = print_insn_m68k;
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#else
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fprintf(out, "0x%lx: Asm output not supported on this arch\n",
(long) code);
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return;
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#endif
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for (pc = (unsigned long)code; pc < (unsigned long)code + size; pc += count) {
fprintf(out, "0x%08lx: ", pc);
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#ifdef __arm__
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/* since data is included in the code, it is better to
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display code data too */
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fprintf(out, "%08x ", (int)bfd_getl32((const bfd_byte *)pc));
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#endif
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count = print_insn(pc, &disasm_info);
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fprintf(out, "\n");
if (count < 0)
break;
}
}
/* Look up symbol for debugging purpose. Returns "" if unknown. */
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const char *lookup_symbol(target_ulong orig_addr)
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{
unsigned int i;
/* Hack, because we know this is x86. */
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Elf32_Sym *sym;
struct syminfo *s;
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target_ulong addr;
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for (s = syminfos; s; s = s->next) {
sym = s->disas_symtab;
for (i = 0; i < s->disas_num_syms; i++) {
if (sym[i].st_shndx == SHN_UNDEF
|| sym[i].st_shndx >= SHN_LORESERVE)
continue;
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if (ELF_ST_TYPE(sym[i].st_info) != STT_FUNC)
continue;
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addr = sym[i].st_value;
#ifdef TARGET_ARM
/* The bottom address bit marks a Thumb symbol. */
addr &= ~(target_ulong)1;
#endif
if (orig_addr >= addr
&& orig_addr < addr + sym[i].st_size)
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return s->disas_strtab + sym[i].st_name;
}
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}
return "";
}
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#if !defined(CONFIG_USER_ONLY)
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void term_vprintf(const char *fmt, va_list ap);
void term_printf(const char *fmt, ...);
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static int monitor_disas_is_physical;
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static CPUState *monitor_disas_env;
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static int
monitor_read_memory (memaddr, myaddr, length, info)
bfd_vma memaddr;
bfd_byte *myaddr;
int length;
struct disassemble_info *info;
{
if (monitor_disas_is_physical) {
cpu_physical_memory_rw(memaddr, myaddr, length, 0);
} else {
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cpu_memory_rw_debug(monitor_disas_env, memaddr,myaddr, length, 0);
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}
return 0;
}
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static int monitor_fprintf(FILE *stream, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
term_vprintf(fmt, ap);
va_end(ap);
return 0;
}
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void monitor_disas(CPUState *env,
target_ulong pc, int nb_insn, int is_physical, int flags)
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{
int count, i;
struct disassemble_info disasm_info;
int (*print_insn)(bfd_vma pc, disassemble_info *info);
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INIT_DISASSEMBLE_INFO(disasm_info, NULL, monitor_fprintf);
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monitor_disas_env = env;
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monitor_disas_is_physical = is_physical;
disasm_info.read_memory_func = monitor_read_memory;
disasm_info.buffer_vma = pc;
#ifdef TARGET_WORDS_BIGENDIAN
disasm_info.endian = BFD_ENDIAN_BIG;
#else
disasm_info.endian = BFD_ENDIAN_LITTLE;
#endif
#if defined(TARGET_I386)
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if (flags == 2)
disasm_info.mach = bfd_mach_x86_64;
else if (flags == 1)
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disasm_info.mach = bfd_mach_i386_i8086;
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else
disasm_info.mach = bfd_mach_i386_i386;
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print_insn = print_insn_i386;
#elif defined(TARGET_ARM)
print_insn = print_insn_arm;
#elif defined(TARGET_SPARC)
print_insn = print_insn_sparc;
#elif defined(TARGET_PPC)
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#ifdef TARGET_PPC64
disasm_info.mach = bfd_mach_ppc64;
#else
disasm_info.mach = bfd_mach_ppc;
#endif
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print_insn = print_insn_ppc;
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#elif defined(TARGET_M68K)
print_insn = print_insn_m68k;
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#elif defined(TARGET_MIPS)
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#ifdef TARGET_WORDS_BIGENDIAN
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print_insn = print_insn_big_mips;
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#else
print_insn = print_insn_little_mips;
#endif
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#elif defined(TARGET_M68K)
print_insn = print_insn_m68k;
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#else
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term_printf("0x" TARGET_FMT_lx
": Asm output not supported on this arch\n", pc);
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return;
#endif
for(i = 0; i < nb_insn; i++) {
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term_printf("0x" TARGET_FMT_lx ": ", pc);
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count = print_insn(pc, &disasm_info);
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term_printf("\n");
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if (count < 0)
break;
pc += count;
}
}
#endif
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