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xemu/disas.c
aliguori 376253ece4 monitor: Rework API (Jan Kiszka) 
Refactor the monitor API and prepare it for decoupled terminals:
term_print functions are renamed to monitor_* and all monitor services
gain a new parameter (mon) that will once refer to the monitor instance
the output is supposed to appear on. However, the argument remains
unused for now. All monitor command callbacks are also extended by a mon
parameter so that command handlers are able to pass an appropriate
reference to monitor output services.

For the case that monitor outputs so far happen without clearly
identifiable context, the global variable cur_mon is introduced that
shall once provide a pointer either to the current active monitor (while
processing commands) or to the default one. On the mid or long term,
those use case will be obsoleted so that this variable can be removed
again.

Due to the broad usage of the monitor interface, this patch mostly deals
with converting users of the monitor API. A few of them are already
extended to pass 'mon' from the command handler further down to internal
functions that invoke monitor_printf.

At this chance, monitor-related prototypes are moved from console.h to
a new monitor.h. The same is done for the readline API.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6711 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-05 23:01:23 +00:00

405 lines
10 KiB
C
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/* General "disassemble this chunk" code. Used for debugging. */
#include "config.h"
#include "dis-asm.h"
#include "elf.h"
#include <errno.h>
#include "cpu.h"
#include "exec-all.h"
#include "disas.h"
/* Filled in by elfload.c. Simplistic, but will do for now. */
struct syminfo *syminfos = NULL;
/* Get LENGTH bytes from info's buffer, at target address memaddr.
Transfer them to myaddr. */
int
buffer_read_memory(bfd_vma memaddr, bfd_byte *myaddr, 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;
}
/* Get LENGTH bytes from info's buffer, at target address memaddr.
Transfer them to myaddr. */
static int
target_read_memory (bfd_vma memaddr,
bfd_byte *myaddr,
int length,
struct disassemble_info *info)
{
int i;
for(i = 0; i < length; i++) {
myaddr[i] = ldub_code(memaddr + i);
}
return 0;
}
/* Print an error message. We can assume that this is in response to
an error return from buffer_read_memory. */
void
perror_memory (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,
"Address 0x%" PRIx64 " is out of bounds.\n", memaddr);
}
/* 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 (bfd_vma addr, struct disassemble_info *info)
{
(*info->fprintf_func) (info->stream, "0x%" PRIx64, addr);
}
/* Just return the given address. */
int
generic_symbol_at_address (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;
}
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;
}
#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 the following
values:
i386 - nonzero means 16 bit code
arm - nonzero means thumb code
ppc - nonzero means little endian
other targets - unused
*/
void target_disas(FILE *out, target_ulong code, target_ulong size, int flags)
{
target_ulong pc;
int count;
struct disassemble_info disasm_info;
int (*print_insn)(bfd_vma pc, disassemble_info *info);
INIT_DISASSEMBLE_INFO(disasm_info, out, fprintf);
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)
if (flags)
print_insn = print_insn_thumb1;
else
print_insn = print_insn_arm;
#elif defined(TARGET_SPARC)
print_insn = print_insn_sparc;
#ifdef TARGET_SPARC64
disasm_info.mach = bfd_mach_sparc_v9b;
#endif
#elif defined(TARGET_PPC)
if (flags >> 16)
disasm_info.endian = BFD_ENDIAN_LITTLE;
if (flags & 0xFFFF) {
/* If we have a precise definitions of the instructions set, use it */
disasm_info.mach = flags & 0xFFFF;
} else {
#ifdef TARGET_PPC64
disasm_info.mach = bfd_mach_ppc64;
#else
disasm_info.mach = bfd_mach_ppc;
#endif
}
print_insn = print_insn_ppc;
#elif defined(TARGET_M68K)
print_insn = print_insn_m68k;
#elif defined(TARGET_MIPS)
#ifdef TARGET_WORDS_BIGENDIAN
print_insn = print_insn_big_mips;
#else
print_insn = print_insn_little_mips;
#endif
#elif defined(TARGET_SH4)
disasm_info.mach = bfd_mach_sh4;
print_insn = print_insn_sh;
#elif defined(TARGET_ALPHA)
disasm_info.mach = bfd_mach_alpha;
print_insn = print_insn_alpha;
#elif defined(TARGET_CRIS)
disasm_info.mach = bfd_mach_cris_v32;
print_insn = print_insn_crisv32;
#else
fprintf(out, "0x" TARGET_FMT_lx
": Asm output not supported on this arch\n", code);
return;
#endif
for (pc = code; size > 0; pc += count, size -= count) {
fprintf(out, "0x" TARGET_FMT_lx ": ", pc);
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);
disasm_info.buffer = code;
disasm_info.buffer_vma = (unsigned long)code;
disasm_info.buffer_length = size;
#ifdef WORDS_BIGENDIAN
disasm_info.endian = BFD_ENDIAN_BIG;
#else
disasm_info.endian = BFD_ENDIAN_LITTLE;
#endif
#if defined(__i386__)
disasm_info.mach = bfd_mach_i386_i386;
print_insn = print_insn_i386;
#elif defined(__x86_64__)
disasm_info.mach = bfd_mach_x86_64;
print_insn = print_insn_i386;
#elif defined(_ARCH_PPC)
print_insn = print_insn_ppc;
#elif defined(__alpha__)
print_insn = print_insn_alpha;
#elif defined(__sparc__)
print_insn = print_insn_sparc;
#if defined(__sparc_v8plus__) || defined(__sparc_v8plusa__) || defined(__sparc_v9__)
disasm_info.mach = bfd_mach_sparc_v9b;
#endif
#elif defined(__arm__)
print_insn = print_insn_arm;
#elif defined(__MIPSEB__)
print_insn = print_insn_big_mips;
#elif defined(__MIPSEL__)
print_insn = print_insn_little_mips;
#elif defined(__m68k__)
print_insn = print_insn_m68k;
#elif defined(__s390__)
print_insn = print_insn_s390;
#elif defined(__hppa__)
print_insn = print_insn_hppa;
#else
fprintf(out, "0x%lx: Asm output not supported on this arch\n",
(long) code);
return;
#endif
for (pc = (unsigned long)code; size > 0; pc += count, size -= count) {
fprintf(out, "0x%08lx: ", pc);
#ifdef __arm__
/* since data is included in the code, it is better to
display code data too */
fprintf(out, "%08x ", (int)bfd_getl32((const bfd_byte *)pc));
#endif
count = print_insn(pc, &disasm_info);
fprintf(out, "\n");
if (count < 0)
break;
}
}
/* Look up symbol for debugging purpose. Returns "" if unknown. */
const char *lookup_symbol(target_ulong orig_addr)
{
const char *symbol = "";
struct syminfo *s;
for (s = syminfos; s; s = s->next) {
symbol = s->lookup_symbol(s, orig_addr);
if (symbol[0] != '\0') {
break;
}
}
return symbol;
}
#if !defined(CONFIG_USER_ONLY)
#include "monitor.h"
static int monitor_disas_is_physical;
static CPUState *monitor_disas_env;
static int
monitor_read_memory (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 {
cpu_memory_rw_debug(monitor_disas_env, memaddr,myaddr, length, 0);
}
return 0;
}
static int monitor_fprintf(FILE *stream, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
monitor_vprintf((Monitor *)stream, fmt, ap);
va_end(ap);
return 0;
}
void monitor_disas(Monitor *mon, CPUState *env,
target_ulong pc, int nb_insn, int is_physical, int flags)
{
int count, i;
struct disassemble_info disasm_info;
int (*print_insn)(bfd_vma pc, disassemble_info *info);
INIT_DISASSEMBLE_INFO(disasm_info, (FILE *)mon, monitor_fprintf);
monitor_disas_env = env;
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)
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)
print_insn = print_insn_arm;
#elif defined(TARGET_ALPHA)
print_insn = print_insn_alpha;
#elif defined(TARGET_SPARC)
print_insn = print_insn_sparc;
#ifdef TARGET_SPARC64
disasm_info.mach = bfd_mach_sparc_v9b;
#endif
#elif defined(TARGET_PPC)
#ifdef TARGET_PPC64
disasm_info.mach = bfd_mach_ppc64;
#else
disasm_info.mach = bfd_mach_ppc;
#endif
print_insn = print_insn_ppc;
#elif defined(TARGET_M68K)
print_insn = print_insn_m68k;
#elif defined(TARGET_MIPS)
#ifdef TARGET_WORDS_BIGENDIAN
print_insn = print_insn_big_mips;
#else
print_insn = print_insn_little_mips;
#endif
#else
monitor_printf(mon, "0x" TARGET_FMT_lx
": Asm output not supported on this arch\n", pc);
return;
#endif
for(i = 0; i < nb_insn; i++) {
monitor_printf(mon, "0x" TARGET_FMT_lx ": ", pc);
count = print_insn(pc, &disasm_info);
monitor_printf(mon, "\n");
if (count < 0)
break;
pc += count;
}
}
#endif
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