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Gdbstub: Fix back-trace on SPARC32

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Gdb expects all registers windows to be flushed in ram, which is not the case
in Qemu. Therefore the back-trace generation doesn't work. This patch adds a
function to handle reads (and only read) in stack frames as if windows were
flushed.

Signed-off-by: Fabien Chouteau <chouteau@adacore.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Fabien Chouteau 2011-09-08 12:48:16 +02:00 • committed by Blue Swirl
parent 7d890b4074
commit 44520db10b
3 changed files with 104 additions and 3 deletions
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16
gdbstub.c
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@ -41,6 +41,15 @@
#include "qemu_socket.h"
#include "kvm.h"
#ifndef TARGET_CPU_MEMORY_RW_DEBUG
static inline int target_memory_rw_debug(CPUState *env, target_ulong addr,
uint8_t *buf, int len, int is_write)
{
return cpu_memory_rw_debug(env, addr, buf, len, is_write);
}
#else
/* target_memory_rw_debug() defined in cpu.h */
#endif
enum {
GDB_SIGNAL_0 = 0,
@ -2109,7 +2118,7 @@ static int gdb_handle_packet(GDBState *s, const char *line_buf)
if (*p == ',')
p++;
len = strtoull(p, NULL, 16);
if (cpu_memory_rw_debug(s->g_cpu, addr, mem_buf, len, 0) != 0) {
if (target_memory_rw_debug(s->g_cpu, addr, mem_buf, len, 0) != 0) {
put_packet (s, "E14");
} else {
memtohex(buf, mem_buf, len);
@ -2124,10 +2133,11 @@ static int gdb_handle_packet(GDBState *s, const char *line_buf)
if (*p == ':')
p++;
hextomem(mem_buf, p, len);
if (cpu_memory_rw_debug(s->g_cpu, addr, mem_buf, len, 1) != 0)
if (target_memory_rw_debug(s->g_cpu, addr, mem_buf, len, 1) != 0) {
put_packet(s, "E14");
else
} else {
put_packet(s, "OK");
}
break;
case 'p':
/* Older gdb are really dumb, and don't use 'g' if 'p' is avaialable.