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Commit ab33bd5c by H.J. Lu Committed by H.J. Lu
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Revert revision 161876. 

2010-07-07  H.J. Lu  <hongjiu.lu@intel.com>

	PR target/44850
	* config/i386/i386.c (ix86_function_ms_hook_prologue): Revert
	revision 161876.
	(ix86_expand_prologue): Likewise.
	(ix86_handle_fndecl_attribute): Likewise.
	(ix86_asm_declare_function_name): Likewise.
	* config/i386/i386.h (ASM_DECLARE_FUNCTION_NAME): Likewise.
	* config/i386/cygming.h (ASM_DECLARE_FUNCTION_NAME): Likewise.
	(SUBTARGET_ASM_DECLARE_FUNCTION_NAME): Likewise.
	* config/i386/i386-protos.h (ix86_asm_declare_function_name):
	Likewise.
	* doc/extend.texi: Likewise.

From-SVN: r161911
parent 5e86e540
Showing with 45 additions and 71 deletions
gcc/ChangeLog
2010-07-07 H.J. Lu <hongjiu.lu@intel.com>
PR target/44850
* config/i386/i386.c (ix86_function_ms_hook_prologue): Revert
revision 161876.
(ix86_expand_prologue): Likewise.
(ix86_handle_fndecl_attribute): Likewise.
(ix86_asm_declare_function_name): Likewise.
* config/i386/i386.h (ASM_DECLARE_FUNCTION_NAME): Likewise.
* config/i386/cygming.h (ASM_DECLARE_FUNCTION_NAME): Likewise.
(SUBTARGET_ASM_DECLARE_FUNCTION_NAME): Likewise.
* config/i386/i386-protos.h (ix86_asm_declare_function_name):
Likewise.
* doc/extend.texi: Likewise.
2010-07-07 H.J. Lu <hongjiu.lu@intel.com>
PR target/44844
* config/i386/i386.md (rdrand<mode>): Changed to expand to
retry if the carry flag isn't valid.
......
gcc/config/i386/cygming.h
......@@ -269,13 +269,14 @@ do { \
/* Write the extra assembler code needed to declare a function
properly. If we are generating SDB debugging information, this
will happen automatically, so we only need to handle other cases. */
#undef SUBTARGET_ASM_DECLARE_FUNCTION_NAME
#define SUBTARGET_ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
#undef ASM_DECLARE_FUNCTION_NAME
#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
do \
{ \
i386_pe_maybe_record_exported_symbol (DECL, NAME, 0); \
if (write_symbols != SDB_DEBUG) \
i386_pe_declare_function_type (FILE, NAME, TREE_PUBLIC (DECL)); \
ASM_OUTPUT_LABEL (FILE, NAME); \
} \
while (0)
......
gcc/config/i386/i386-protos.h
......@@ -136,7 +136,6 @@ extern enum machine_mode ix86_fp_compare_mode (enum rtx_code);
extern rtx ix86_libcall_value (enum machine_mode);
extern bool ix86_function_arg_regno_p (int);
extern void ix86_asm_declare_function_name (FILE *, const char *, tree);
extern int ix86_function_arg_boundary (enum machine_mode, tree);
extern bool ix86_sol10_return_in_memory (const_tree,const_tree);
extern rtx ix86_force_to_memory (enum machine_mode, rtx);
......
gcc/config/i386/i386.c
......@@ -5078,15 +5078,18 @@ ix86_function_type_abi (const_tree fntype)
static bool
ix86_function_ms_hook_prologue (const_tree fntype)
{
if (lookup_attribute ("ms_hook_prologue", DECL_ATTRIBUTES (fntype)))
if (!TARGET_64BIT)
{
if (decl_function_context (fntype) != NULL_TREE)
{
error_at (DECL_SOURCE_LOCATION (fntype),
"ms_hook_prologue is not compatible with nested function");
}
if (lookup_attribute ("ms_hook_prologue", DECL_ATTRIBUTES (fntype)))
{
if (decl_function_context (fntype) != NULL_TREE)
{
error_at (DECL_SOURCE_LOCATION (fntype),
"ms_hook_prologue is not compatible with nested function");
}
return true;
return true;
}
}
return false;
}
......@@ -5109,45 +5112,6 @@ ix86_cfun_abi (void)
return cfun->machine->call_abi;
}
/* Write the extra assembler code needed to declare a function properly. */
void
ix86_asm_declare_function_name (FILE *asm_out_file, const char *fname,
tree decl)
{
bool is_ms_hook = ((decl && ix86_function_ms_hook_prologue (decl)) ? true
: false);
#ifdef SUBTARGET_ASM_DECLARE_FUNCTION_NAME
SUBTARGET_ASM_DECLARE_FUNCTION_NAME (asm_out_file, fname, decl);
#endif
if (is_ms_hook)
{
int i, filler_count = (TARGET_64BIT ? 32 : 16);
unsigned int filler_cc = 0xcccccccc;
for (i = 0; i < filler_count; i += 4)
fprintf (asm_out_file, ASM_LONG " %#x\n", filler_cc);
}
ASM_OUTPUT_LABEL (asm_out_file, fname);
/* Output magic byte marker, if hot-patch attribute is set.
For x86 case frame-pointer prologue will be emitted in
expand_prologue. */
if (is_ms_hook)
{
if (TARGET_64BIT)
/* leaq [%rsp + 0], %rsp */
asm_fprintf (asm_out_file, ASM_BYTE
"0x48, 0x8d, 0xa4, 0x24, "
"0x00, 0x00, 0x00, 0x00\n");
else
/* movl.s %edi, %edi. */
asm_fprintf (asm_out_file, ASM_BYTE "0x8b, 0xff\n");
}
}
/* regclass.c */
extern void init_regs (void);
......@@ -8793,24 +8757,21 @@ ix86_expand_prologue (void)
ix86_compute_frame_layout (&frame);
if (!TARGET_64BIT && ix86_function_ms_hook_prologue (current_function_decl))
if (ix86_function_ms_hook_prologue (current_function_decl))
{
rtx push, mov;
/* Make sure the function starts with
8b ff movl.s %edi,%edi (see below in text)
8b ff movl.s %edi,%edi
55 push %ebp
8b ec movl.s %esp,%ebp
This matches the hookable function prologue in Win32 API
functions in Microsoft Windows XP Service Pack 2 and newer.
Wine uses this to enable Windows apps to hook the Win32 API
functions provided by Wine.
Remark: Initial nop-move gets emitted by the function
ix86_asm_declare_function_name and isn't part of this
function. The following instruction don't get hard-coded
in ix86_asm_declare_function_name too, as here notes
for those instructions are necessary for unwinder/debug. */
functions provided by Wine. */
insn = emit_insn (gen_vswapmov (gen_rtx_REG (SImode, DI_REG),
gen_rtx_REG (SImode, DI_REG)));
push = emit_insn (gen_push (hard_frame_pointer_rtx));
mov = emit_insn (gen_vswapmov (hard_frame_pointer_rtx,
stack_pointer_rtx));
......@@ -26592,9 +26553,15 @@ ix86_handle_fndecl_attribute (tree *node, tree name,
return NULL_TREE;
}
if (TARGET_64BIT)
{
warning (OPT_Wattributes, "%qE attribute only available for 32-bit",
name);
return NULL_TREE;
}
#ifndef HAVE_AS_IX86_SWAP
if (!TARGET_64BIT)
sorry ("ms_hook_prologue attribute needs assembler swap suffix support");
sorry ("ms_hook_prologue attribute needs assembler swap suffix support");
#endif
return NULL_TREE;
......
gcc/config/i386/i386.h
......@@ -2082,14 +2082,6 @@ do { \
}
#endif
/* Write the extra assembler code needed to declare a function
properly. Target can add additional code by the sub-target
macro SUBTARGET_ASM_DECLARE_FUNCTION_NAME. */
#undef ASM_DECLARE_FUNCTION_NAME
#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
ix86_asm_declare_function_name (FILE, NAME, DECL)
/* Under some conditions we need jump tables in the text section,
because the assembler cannot handle label differences between
sections. This is the case for x86_64 on Mach-O for example. */
......
gcc/doc/extend.texi
......@@ -2736,10 +2736,10 @@ the @option{-maccumulate-outgoing-args} option.
@item ms_hook_prologue
@cindex @code{ms_hook_prologue} attribute
On 32 bit i[34567]86-*-* targets and 64 bit x86_64-*-* targets, you can use
this function attribute to make gcc generate the "hot-patching" function
prologue used in Win32 API functions in Microsoft Windows XP Service Pack 2
and newer.
On 32 bit i[34567]86-*-* targets, you can use this function attribute to make
gcc generate the "hot-patching" function prologue used in Win32 API
functions in Microsoft Windows XP Service Pack 2 and newer. This requires
support for the swap suffix in the assembler. (GNU Binutils 2.19.51 or later)
@item naked
@cindex function without a prologue/epilogue code
......
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