FreeChainXenon/binutils-gdb
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Implement return values on amd64-windows.

Browse source 
* amd64-windows-tdep.c: #include gdbcore.h and regcache.h.
        (amd64_windows_return_value): New function.
        (amd64_windows_init_abi): Call set_gdbarch_return_value with
        amd64_windows_return_value.
This commit is contained in:
Joel Brobecker 2010-01-29 05:29:21 +00:00
parent 3af6ddfec6
commit cba6fab54a
2 changed files with 64 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
gdb/ChangeLog
View file

@ -1,7 +1,15 @@
2010-01-29 Joel Brobecker <brobecker@adacore.com>
Implement return values on amd64-windows.
* amd64-windows-tdep.c: #include gdbcore.h and regcache.h.
(amd64_windows_return_value): New function.
(amd64_windows_init_abi): Call set_gdbarch_return_value with
amd64_windows_return_value.
2010-01-29 Joel Brobecker <brobecker@adacore.com>
amd64-windows: 32 bytes allocated on stack by caller for integer
parameter registers
parameter registers.
* i386-tdep.h (struct gdbarch_tdep): Add new field
integer_param_regs_saved_in_caller_frame.
* amd64-windows-tdep.c (amd64_windows_init_abi): Set

55
gdb/amd64-windows-tdep.c
View file

@ -21,6 +21,8 @@
#include "solib.h"
#include "solib-target.h"
#include "gdbtypes.h"
#include "gdbcore.h"
#include "regcache.h"
/* The registers used to pass integer arguments during a function call. */
static int amd64_windows_dummy_call_integer_regs[] =
@ -68,6 +70,58 @@ amd64_windows_classify (struct type *type, enum amd64_reg_class class[2])
}
}
/* Implement the "return_value" gdbarch method for amd64-windows. */
static enum return_value_convention
amd64_windows_return_value (struct gdbarch *gdbarch, struct type *func_type,
struct type *type, struct regcache *regcache,
gdb_byte *readbuf, const gdb_byte *writebuf)
{
int len = TYPE_LENGTH (type);
int regnum = -1;
/* See if our value is returned through a register. If it is, then
store the associated register number in REGNUM. */
switch (TYPE_CODE (type))
{
case TYPE_CODE_FLT:
case TYPE_CODE_DECFLOAT:
/* __m128, __m128i, __m128d, floats, and doubles are returned
via XMM0. */
if (len == 4 || len == 8 || len == 16)
regnum = AMD64_XMM0_REGNUM;
break;
default:
/* All other values that are 1, 2, 4 or 8 bytes long are returned
via RAX. */
if (len == 1 || len == 2 || len == 4 || len == 8)
regnum = AMD64_RAX_REGNUM;
break;
}
if (regnum < 0)
{
/* RAX contains the address where the return value has been stored. */
if (readbuf)
{
ULONGEST addr;
regcache_raw_read_unsigned (regcache, AMD64_RAX_REGNUM, &addr);
read_memory (addr, readbuf, TYPE_LENGTH (type));
}
return RETURN_VALUE_ABI_RETURNS_ADDRESS;
}
else
{
/* Extract the return value from the register where it was stored. */
if (readbuf)
regcache_raw_read_part (regcache, regnum, 0, len, readbuf);
if (writebuf)
regcache_raw_write_part (regcache, regnum, 0, len, writebuf);
return RETURN_VALUE_REGISTER_CONVENTION;
}
}
static void
amd64_windows_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
@ -85,6 +139,7 @@ amd64_windows_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
tdep->classify = amd64_windows_classify;
tdep->memory_args_by_pointer = 1;
tdep->integer_param_regs_saved_in_caller_frame = 1;
set_gdbarch_return_value (gdbarch, amd64_windows_return_value);
set_solib_ops (gdbarch, &solib_target_so_ops);
}