+2010-07-06 Kai Tietz <kai.tietz@onevision.com>
+
+ * config/i386/i386.c (ix86_function_ms_hook_prologue): Enable x64
+ support.
+ (ix86_expand_prologue): Likewise.
+ (ix86_handle_fndecl_attribute): Likewise.
+ (ix86_asm_declare_function_name): New function for
+ ASM_DECLARE_FUNCTION_NAME.
+ * config/i386/i386.h (ASM_DECLARE_FUNCTION_NAME): New macro.
+ * config/i386/cygming.h (ASM_DECLARE_FUNCTION_NAME): Removed.
+ (SUBTARGET_ASM_DECLARE_FUNCTION_NAME): New macro.
+ * config/i386/i386-protos.h (ix86_asm_declare_function_name): New.
+ * doc/extend.texi: Adjust documentation about ms_hook_prologue
+ attribute.
+
2010-07-06 Uros Bizjak <ubizjak@gmail.com>
* config/i386/i386.md (immediate_operand): New mode attribute.
/* 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 ASM_DECLARE_FUNCTION_NAME
-#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
+#undef SUBTARGET_ASM_DECLARE_FUNCTION_NAME
+#define SUBTARGET_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)
static bool
ix86_function_ms_hook_prologue (const_tree fntype)
{
- if (!TARGET_64BIT)
+ if (lookup_attribute ("ms_hook_prologue", DECL_ATTRIBUTES (fntype)))
{
- 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");
- }
+ 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;
}
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);
ix86_compute_frame_layout (&frame);
- if (ix86_function_ms_hook_prologue (current_function_decl))
+ if (!TARGET_64BIT && ix86_function_ms_hook_prologue (current_function_decl))
{
rtx push, mov;
/* Make sure the function starts with
- 8b ff movl.s %edi,%edi
+ 8b ff movl.s %edi,%edi (see below in text)
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. */
- insn = emit_insn (gen_vswapmov (gen_rtx_REG (SImode, DI_REG),
- gen_rtx_REG (SImode, DI_REG)));
+ 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. */
push = emit_insn (gen_push (hard_frame_pointer_rtx));
mov = emit_insn (gen_vswapmov (hard_frame_pointer_rtx,
stack_pointer_rtx));
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
- sorry ("ms_hook_prologue attribute needs assembler swap suffix support");
+ if (!TARGET_64BIT)
+ sorry ("ms_hook_prologue attribute needs assembler swap suffix support");
#endif
return NULL_TREE;
git://gcc.gnu.org / gcc.git / commitdiff