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amd64-windows: 32 bytes allocated on stack by caller for integer parameter registers

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* 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
        tdep->integer_param_regs_saved_in_caller_frame to 1.
        * amd64-tdep.c (amd64_push_dummy_call): Allocate some memory on
        stack if tdep->integer_param_regs_saved_in_caller_frame is set.
This commit is contained in:
Joel Brobecker 2010-01-29 05:27:36 +00:00
parent 4966b6c228
commit 3af6ddfec6
4 changed files with 32 additions and 4 deletions
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11
gdb/ChangeLog
View File

@ -1,3 +1,14 @@
2010-01-29 Joel Brobecker <brobecker@adacore.com>
amd64-windows: 32 bytes allocated on stack by caller for integer
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
tdep->integer_param_regs_saved_in_caller_frame to 1.
* amd64-tdep.c (amd64_push_dummy_call): Allocate some memory on
stack if tdep->integer_param_regs_saved_in_caller_frame is set.
2010-01-29 Joel Brobecker <brobecker@adacore.com>
amd64-windows: memory args passed by pointer during function calls.

6
gdb/amd64-tdep.c
View File

@ -701,6 +701,7 @@ amd64_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
int struct_return, CORE_ADDR struct_addr)
{
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
gdb_byte buf[8];
/* Pass arguments. */
@ -718,6 +719,11 @@ amd64_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
regcache_cooked_write (regcache, arg_regnum, buf);
}
/* Reserve some memory on the stack for the integer-parameter registers,
if required by the ABI. */
if (tdep->integer_param_regs_saved_in_caller_frame)
sp -= tdep->call_dummy_num_integer_regs * 8;
/* Store return address. */
sp -= 8;
store_unsigned_integer (buf, 8, byte_order, bp_addr);

1
gdb/amd64-windows-tdep.c
View File

@ -84,6 +84,7 @@ amd64_windows_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
tdep->call_dummy_integer_regs = amd64_windows_dummy_call_integer_regs;
tdep->classify = amd64_windows_classify;
tdep->memory_args_by_pointer = 1;
tdep->integer_param_regs_saved_in_caller_frame = 1;
set_solib_ops (gdbarch, &solib_target_so_ops);
}

18
gdb/i386-tdep.h
View File

@ -82,12 +82,12 @@ struct gdbarch_tdep
int call_dummy_num_integer_regs;
int *call_dummy_integer_regs;
/* Classify TYPE according to calling conventions, and store
the result in CLASS. Used on amd64 only. */
/* Used on amd64 only. Classify TYPE according to calling conventions,
and store the result in CLASS. */
void (*classify) (struct type *type, enum amd64_reg_class class[2]);
/* Non-zero if the first few MEMORY arguments should be passed by
pointer.
/* Used on amd64 only. Non-zero if the first few MEMORY arguments
should be passed by pointer.
More precisely, MEMORY arguments are passed through the stack.
But certain architectures require that their address be passed
@ -95,6 +95,16 @@ struct gdbarch_tdep
available for argument passing. */
int memory_args_by_pointer;
/* Used on amd64 only.
If non-zero, then the callers of a function are expected to reserve
some space in the stack just before the area where the PC is saved
so that the callee may save the integer-parameter registers there.
The amount of space is dependent on the list of registers used for
integer parameter passing (see component call_dummy_num_integer_regs
above). */
int integer_param_regs_saved_in_caller_frame;
/* Floating-point registers. */
struct regset *fpregset;
size_t sizeof_fpregset;