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* ppc-sysv-tdep.c (do_ppc_sysv_return_value): Fix the code that 

deals with the broken GCC convention.
This commit is contained in:
Mark Kettenis 2005-08-17 07:44:13 +00:00
parent 24dc748d60
commit 61bf9ae086
2 changed files with 26 additions and 40 deletions
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5
gdb/ChangeLog
View File

@ -1,3 +1,8 @@
2005-08-17 Mark Kettenis <kettenis@gnu.org>
* ppc-sysv-tdep.c (do_ppc_sysv_return_value): Fix the code that
deals with the broken GCC convention.
2005-08-16 Mark Kettenis <kettenis@gnu.org>
* ppc-sysv-tdep.c (ppc_sysv_abi_push_dummy_call): Set condition

61
gdb/ppc-sysv-tdep.c
View File

@ -451,52 +451,33 @@ do_ppc_sysv_return_value (struct gdbarch *gdbarch, struct type *type,
}
if (broken_gcc && TYPE_LENGTH (type) <= 8)
{
/* GCC screwed up for structures or unions whose size is less
than or equal to 8 bytes.. Instead of left-aligning, it
right-aligns the data into the buffer formed by r3, r4. */
gdb_byte regvals[MAX_REGISTER_SIZE * 2];
int len = TYPE_LENGTH (type);
int offset = (2 * tdep->wordsize - len) % tdep->wordsize;
if (readbuf)
{
/* GCC screwed up. The last register isn't "left" aligned.
Need to extract the least significant part of each
register and then store that. */
/* Transfer any full words. */
int word = 0;
while (1)
{
ULONGEST reg;
int len = TYPE_LENGTH (type) - word * tdep->wordsize;
if (len <= 0)
break;
if (len > tdep->wordsize)
len = tdep->wordsize;
regcache_cooked_read_unsigned (regcache,
tdep->ppc_gp0_regnum + 3 + word,
&reg);
store_unsigned_integer (((bfd_byte *) readbuf
+ word * tdep->wordsize), len, reg);
word++;
}
regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 3,
regvals + 0 * tdep->wordsize);
if (len > tdep->wordsize)
regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 4,
regvals + 1 * tdep->wordsize);
memcpy (readbuf, regvals + offset, len);
}
if (writebuf)
{
/* GCC screwed up. The last register isn't "left" aligned.
Need to extract the least significant part of each
register and then store that. */
/* Transfer any full words. */
int word = 0;
while (1)
{
ULONGEST reg;
int len = TYPE_LENGTH (type) - word * tdep->wordsize;
if (len <= 0)
break;
if (len > tdep->wordsize)
len = tdep->wordsize;
reg = extract_unsigned_integer (((const bfd_byte *) writebuf
+ word * tdep->wordsize), len);
regcache_cooked_write_unsigned (regcache,
tdep->ppc_gp0_regnum + 3 + word,
reg);
word++;
}
memset (regvals, 0, sizeof regvals);
memcpy (regvals + offset, writebuf, len);
regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 3,
regvals + 0 * tdep->wordsize);
if (len > tdep->wordsize)
regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 4,
regvals + 1 * tdep->wordsize);
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
if (TYPE_LENGTH (type) <= 8)