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target-ppc: Change core powerpc gdbstub bits to be XML-aware 

Define GDB_CORE_XML and hack things similarly to ARM so that despite the
FP registers coming in between the GPRs and some status registers,
everything works out OK no matter which kind of GDB we're communicating
with.

It matters whether we're built to target 64-bit or 32-bit cores.  I
think there are still problems if we are debugging 32-bit programs on a
built-for-64-bit QEMU (QEMU will always send 64-bit registers), but I
don't know if there's a good way around that at the time being.

Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6421 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aurel32 2009-01-24 15:07:42 +00:00
parent c8b3532d8a
commit e571cb477b
1 changed files with 22 additions and 1 deletions
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23
gdbstub.c
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@ -620,7 +620,17 @@ static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int i)
#elif defined (TARGET_PPC)
/* Old gdb always expects FP registers. Newer (xml-aware) gdb only
expects whatever the target description contains. Due to a
historical mishap the FP registers appear in between core integer
regs and PC, MSR, CR, and so forth. We hack round this by giving the
FP regs zero size when talking to a newer gdb. */
#define NUM_CORE_REGS 71
#if defined (TARGET_PPC64)
#define GDB_CORE_XML "power64-core.xml"
#else
#define GDB_CORE_XML "power-core.xml"
#endif
static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n)
{
@ -629,6 +639,8 @@ static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n)
GET_REGL(env->gpr[n]);
} else if (n < 64) {
/* fprs */
if (gdb_has_xml)
return 0;
stfq_p(mem_buf, env->fpr[n-32]);
return 8;
} else {
@ -646,7 +658,12 @@ static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n)
case 67: GET_REGL(env->lr);
case 68: GET_REGL(env->ctr);
case 69: GET_REGL(env->xer);
case 70: GET_REG32(0); /* fpscr */
case 70:
{
if (gdb_has_xml)
return 0;
GET_REG32(0); /* fpscr */
}
}
}
return 0;
@ -660,6 +677,8 @@ static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int n)
return sizeof(target_ulong);
} else if (n < 64) {
/* fprs */
if (gdb_has_xml)
return 0;
env->fpr[n-32] = ldfq_p(mem_buf);
return 8;
} else {
@ -689,6 +708,8 @@ static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int n)
return sizeof(target_ulong);
case 70:
/* fpscr */
if (gdb_has_xml)
return 0;
return 4;
}
}