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2003-09-16 Andrew Cagney <cagney@redhat.com>

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* ppc-linux-tdep.c (ppc_linux_init_abi): Set the 32 bit
	"use_struct_convention" to "ppc_linux_use_struct_convention".
	(ppc_linux_use_struct_convention): New function.
	* rs6000-tdep.c (rs6000_use_struct_convention): New function.
	(rs6000_gdbarch_init): For AIX, set "use_struct_convention" to
	"rs6000_use_struct_convention".
	* ppc-tdep.h (ppc_sysv_abi_broken_use_struct_convention): Delete
	declaration.
	* ppc-sysv-tdep.c (ppc_sysv_abi_broken_use_struct_convention):
	Delete function.
This commit is contained in:
Andrew Cagney 2003-09-16 23:33:17 +00:00
parent aa1ee363bc
commit b9ff3018cd
4 changed files with 49 additions and 22 deletions
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13
gdb/ChangeLog
View File

@ -1,3 +1,16 @@
2003-09-16 Andrew Cagney <cagney@redhat.com>
* ppc-linux-tdep.c (ppc_linux_init_abi): Set the 32 bit
"use_struct_convention" to "ppc_linux_use_struct_convention".
(ppc_linux_use_struct_convention): New function.
* rs6000-tdep.c (rs6000_use_struct_convention): New function.
(rs6000_gdbarch_init): For AIX, set "use_struct_convention" to
"rs6000_use_struct_convention".
* ppc-tdep.h (ppc_sysv_abi_broken_use_struct_convention): Delete
declaration.
* ppc-sysv-tdep.c (ppc_sysv_abi_broken_use_struct_convention):
Delete function.
2003-09-16 Andrew Cagney <cagney@redhat.com>
* buildsym.c: Remove more occurances of "register".

30
gdb/ppc-linux-tdep.c
View File

@ -591,6 +591,20 @@ ppc_linux_memory_remove_breakpoint (CORE_ADDR addr, char *contents_cache)
return val;
}
/* For historic reasons, PPC 32 GNU/Linux follows PowerOpen rather
than the 32 bit SYSV R4 ABI structure return convention - all
structures, no matter their size, are put in memory. Vectors,
which were added later, do get returned in a register though. */
static int
ppc_linux_use_struct_convention (int gcc_p, struct type *value_type)
{
if ((TYPE_LENGTH (value_type) == 16 || TYPE_LENGTH (value_type) == 8)
&& TYPE_VECTOR (value_type))
return 0;
return 1;
}
/* Fetch (and possibly build) an appropriate link_map_offsets
structure for GNU/Linux PPC targets using the struct offsets
defined in link.h (but without actual reference to that file).
@ -1017,15 +1031,17 @@ ppc_linux_init_abi (struct gdbarch_info info,
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
/* Until November 2001, gcc was not complying to the SYSV ABI for
returning structures less than or equal to 8 bytes in size. It was
returning everything in memory. When this was corrected, it wasn't
fixed for native platforms. */
set_gdbarch_use_struct_convention (gdbarch,
ppc_sysv_abi_broken_use_struct_convention);
if (tdep->wordsize == 4)
{
/* Until November 2001, gcc did not comply with the 32 bit SysV
R4 ABI requirement that structures less than or equal to 8
bytes should be returned in registers. Instead GCC was using
the the AIX/PowerOpen ABI - everything returned in memory
(well ignoring vectors that is). When this was corrected, it
wasn't fixed for GNU/Linux native platform. Use the
PowerOpen struct convention. */
set_gdbarch_use_struct_convention (gdbarch, ppc_linux_use_struct_convention);
/* Note: kevinb/2002-04-12: See note in rs6000_gdbarch_init regarding
*_push_arguments(). The same remarks hold for the methods below. */
set_gdbarch_frameless_function_invocation (gdbarch,

14
gdb/ppc-sysv-tdep.c
View File

@ -329,20 +329,6 @@ ppc_sysv_abi_push_dummy_call (struct gdbarch *gdbarch, CORE_ADDR func_addr,
return sp;
}
/* Until November 2001, gcc was not complying to the SYSV ABI for
returning structures less than or equal to 8 bytes in size. It was
returning everything in memory. When this was corrected, it wasn't
fixed for native platforms. */
int
ppc_sysv_abi_broken_use_struct_convention (int gcc_p, struct type *value_type)
{
if ((TYPE_LENGTH (value_type) == 16 || TYPE_LENGTH (value_type) == 8)
&& TYPE_VECTOR (value_type))
return 0;
return generic_use_struct_convention (gcc_p, value_type);
}
/* Structures 8 bytes or less long are returned in the r3 & r4
registers, according to the SYSV ABI. */
int

14
gdb/rs6000-tdep.c
View File

@ -1372,6 +1372,18 @@ e500_extract_return_value (struct type *valtype, struct regcache *regbuf, void *
}
}
/* PowerOpen always puts structures in memory. Vectors, which were
added later, do get returned in a register though. */
static int
rs6000_use_struct_convention (int gcc_p, struct type *value_type)
{
if ((TYPE_LENGTH (value_type) == 16 || TYPE_LENGTH (value_type) == 8)
&& TYPE_VECTOR (value_type))
return 0;
return 1;
}
static void
rs6000_extract_return_value (struct type *valtype, char *regbuf, char *valbuf)
{
@ -2957,7 +2969,7 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
ppc_sysv_abi_use_struct_convention);
else
set_gdbarch_use_struct_convention (gdbarch,
generic_use_struct_convention);
rs6000_use_struct_convention);
set_gdbarch_frameless_function_invocation (gdbarch,
rs6000_frameless_function_invocation);