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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> 2010-01-29 Joel Brobecker <brobecker@adacore.com>
amd64-windows: memory args passed by pointer during function calls. amd64-windows: memory args passed by pointer during function calls.

6
gdb/amd64-tdep.c
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@ -701,6 +701,7 @@ amd64_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
int struct_return, CORE_ADDR struct_addr) int struct_return, CORE_ADDR struct_addr)
{ {
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
gdb_byte buf[8]; gdb_byte buf[8];
/* Pass arguments. */ /* Pass arguments. */
@ -718,6 +719,11 @@ amd64_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
regcache_cooked_write (regcache, arg_regnum, buf); 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. */ /* Store return address. */
sp -= 8; sp -= 8;
store_unsigned_integer (buf, 8, byte_order, bp_addr); 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->call_dummy_integer_regs = amd64_windows_dummy_call_integer_regs;
tdep->classify = amd64_windows_classify; tdep->classify = amd64_windows_classify;
tdep->memory_args_by_pointer = 1; tdep->memory_args_by_pointer = 1;
tdep->integer_param_regs_saved_in_caller_frame = 1;
set_solib_ops (gdbarch, &solib_target_so_ops); 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_num_integer_regs;
int *call_dummy_integer_regs; int *call_dummy_integer_regs;
/* Classify TYPE according to calling conventions, and store /* Used on amd64 only. Classify TYPE according to calling conventions,
the result in CLASS. Used on amd64 only. */ and store the result in CLASS. */
void (*classify) (struct type *type, enum amd64_reg_class class[2]); void (*classify) (struct type *type, enum amd64_reg_class class[2]);
/* Non-zero if the first few MEMORY arguments should be passed by /* Used on amd64 only. Non-zero if the first few MEMORY arguments
pointer. should be passed by pointer.
More precisely, MEMORY arguments are passed through the stack. More precisely, MEMORY arguments are passed through the stack.
But certain architectures require that their address be passed But certain architectures require that their address be passed
@ -95,6 +95,16 @@ struct gdbarch_tdep
available for argument passing. */ available for argument passing. */
int memory_args_by_pointer; 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. */ /* Floating-point registers. */
struct regset *fpregset; struct regset *fpregset;
size_t sizeof_fpregset; size_t sizeof_fpregset;