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qemu
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added correct memory access code for system emulation 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@407 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2003-10-27 21:13:58 +00:00
parent 93a40ea926
commit c6105c0a04
1 changed files with 33 additions and 6 deletions
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39
disas.c
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@ -5,6 +5,9 @@
#include "elf.h"
#include <errno.h>
#include "cpu.h"
#include "exec-all.h"
/* Filled in by elfload.c. Simplistic, but will do for now. */
unsigned int disas_num_syms;
void *disas_symtab;
@ -19,14 +22,32 @@ buffer_read_memory (memaddr, myaddr, length, info)
int length;
struct disassemble_info *info;
{
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;
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;
}
#if !defined(CONFIG_USER_ONLY)
/* Get LENGTH bytes from info's buffer, at target address memaddr.
Transfer them to myaddr. */
static int
target_read_memory (memaddr, myaddr, length, info)
bfd_vma memaddr;
bfd_byte *myaddr;
int length;
struct disassemble_info *info;
{
int i;
for(i = 0; i < length; i++) {
myaddr[i] = ldub_code((void *)((long)memaddr));
}
return 0;
}
#endif
/* Print an error message. We can assume that this is in response to
an error return from buffer_read_memory. */
void
@ -103,6 +124,12 @@ void disas(FILE *out, void *code, unsigned long size, int is_host, int flags)
INIT_DISASSEMBLE_INFO(disasm_info, out, fprintf);
#if !defined(CONFIG_USER_ONLY)
if (!is_host) {
disasm_info.read_memory_func = target_read_memory;
}
#endif
disasm_info.buffer = code;
disasm_info.buffer_vma = (unsigned long)code;
disasm_info.buffer_length = size;