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Re: libffi merge


x86 changes: merge from libffi -> gcc.

Timothy Wall, please check this one.

Thanks,
Andrew.



2008-02-26  Anthony Green  <green@redhat.com>
            Thomas Heller  <theller@ctypes.org>

        * src/x86/ffi.c (ffi_closure_SYSV_inner): Change C++ comment to C
        comment.

2008-02-03  Timothy Wall  <twall@users.sf.net>

        * src/x86/ffi.c (FFI_INIT_TRAMPOLINE_STDCALL): Calculate jump return
          offset based on code pointer, not data pointer.

2008-01-31  Timothy Wall <twall@users.sf.net>

        * testsuite/libffi.call/closure_stdcall.c: Add test for stdcall
        closures.
        * src/x86/ffitarget.h: Increase size of trampoline for stdcall
        closures.
        * src/x86/win32.S: Add assembly for stdcall closure.
        * src/x86/ffi.c: Initialize stdcall closure trampoline.

--- /home/aph/gcc/trunk/libffi/src/x86/ffi.c	2009-06-04 16:47:13.000000000 +0100
+++ ./src/x86/ffi.c	2008-04-03 19:57:34.000000000 +0100
@@ -1,5 +1,5 @@
 /* -----------------------------------------------------------------------
-   ffi.c - Copyright (c) 1996, 1998, 1999, 2001, 2007  Red Hat, Inc.
+   ffi.c - Copyright (c) 1996, 1998, 1999, 2001, 2007, 2008  Red Hat, Inc.
            Copyright (c) 2002  Ranjit Mathew
            Copyright (c) 2002  Bo Thorsen
            Copyright (c) 2002  Roger Sayle
@@ -236,6 +236,10 @@
      __attribute__ ((regparm(1)));
 void FFI_HIDDEN ffi_closure_raw_SYSV (ffi_raw_closure *)
      __attribute__ ((regparm(1)));
+#ifdef X86_WIN32
+void FFI_HIDDEN ffi_closure_STDCALL (ffi_closure *)
+     __attribute__ ((regparm(1)));
+#endif

 /* This function is jumped to by the trampoline */

@@ -245,7 +249,7 @@
      void **respp;
      void *args;
 {
-  // our various things...
+  /* our various things...  */
   ffi_cif       *cif;
   void         **arg_area;

@@ -311,13 +315,26 @@
 ({ unsigned char *__tramp = (unsigned char*)(TRAMP); \
    unsigned int  __fun = (unsigned int)(FUN); \
    unsigned int  __ctx = (unsigned int)(CTX); \
-   unsigned int  __dis = __fun - (__ctx + FFI_TRAMPOLINE_SIZE); \
+   unsigned int  __dis = __fun - (__ctx + 10);	\
    *(unsigned char*) &__tramp[0] = 0xb8; \
    *(unsigned int*)  &__tramp[1] = __ctx; /* movl __ctx, %eax */ \
    *(unsigned char *)  &__tramp[5] = 0xe9; \
    *(unsigned int*)  &__tramp[6] = __dis; /* jmp __fun  */ \
  })

+#define FFI_INIT_TRAMPOLINE_STDCALL(TRAMP,FUN,CTX,SIZE)  \
+({ unsigned char *__tramp = (unsigned char*)(TRAMP); \
+   unsigned int  __fun = (unsigned int)(FUN); \
+   unsigned int  __ctx = (unsigned int)(CTX); \
+   unsigned int  __dis = __fun - (__ctx + 10); \
+   unsigned short __size = (unsigned short)(SIZE); \
+   *(unsigned char*) &__tramp[0] = 0xb8; \
+   *(unsigned int*)  &__tramp[1] = __ctx; /* movl __ctx, %eax */ \
+   *(unsigned char *)  &__tramp[5] = 0xe8; \
+   *(unsigned int*)  &__tramp[6] = __dis; /* call __fun  */ \
+   *(unsigned char *)  &__tramp[10] = 0xc2; \
+   *(unsigned short*)  &__tramp[11] = __size; /* ret __size  */ \
+ })

 /* the cif must already be prep'ed */

@@ -328,11 +345,24 @@
 		      void *user_data,
 		      void *codeloc)
 {
-  FFI_ASSERT (cif->abi == FFI_SYSV);
-
-  FFI_INIT_TRAMPOLINE (&closure->tramp[0], \
-		       &ffi_closure_SYSV,  \
-		       codeloc);
+  if (cif->abi == FFI_SYSV)
+    {
+      FFI_INIT_TRAMPOLINE (&closure->tramp[0],
+                           &ffi_closure_SYSV,
+                           (void*)codeloc);
+    }
+#ifdef X86_WIN32
+  else if (cif->abi == FFI_STDCALL)
+    {
+      FFI_INIT_TRAMPOLINE_STDCALL (&closure->tramp[0],
+                                   &ffi_closure_STDCALL,
+                                   (void*)codeloc, cif->bytes);
+    }
+#endif
+  else
+    {
+      return FFI_BAD_ABI;
+    }

   closure->cif  = cif;
   closure->user_data = user_data;
@@ -354,7 +384,9 @@
 {
   int i;

-  FFI_ASSERT (cif->abi == FFI_SYSV);
+  if (cif->abi != FFI_SYSV) {
+    return FFI_BAD_ABI;
+  }

   // we currently don't support certain kinds of arguments for raw
   // closures.  This should be implemented by a separate assembly language
--- /home/aph/gcc/trunk/libffi/src/x86/ffitarget.h	2009-06-04 15:25:12.000000000 +0100
+++ ./src/x86/ffitarget.h	2008-02-15 01:24:06.000000000 +0000
@@ -78,7 +78,11 @@
 #define FFI_TRAMPOLINE_SIZE 24
 #define FFI_NATIVE_RAW_API 0
 #else
+#ifdef X86_WIN32
+#define FFI_TRAMPOLINE_SIZE 13
+#else
 #define FFI_TRAMPOLINE_SIZE 10
+#endif
 #define FFI_NATIVE_RAW_API 1	/* x86 has native raw api support */
 #endif

--- /home/aph/gcc/trunk/libffi/src/x86/win32.S	2009-06-04 15:43:59.000000000 +0100
+++ ./src/x86/win32.S	2009-06-04 15:30:26.000000000 +0100
@@ -264,6 +264,22 @@
 .ffi_call_STDCALL_end:
 .LFE2:

+	.globl _ffi_closure_STDCALL
+_ffi_closure_STDCALL:
+	pushl	%ebp
+	movl	%esp, %ebp
+	subl	$40, %esp
+	leal	-24(%ebp), %edx
+	movl	%edx, -12(%ebp)	/* resp */
+	leal	12(%ebp), %edx  /* account for stub return address on stack */
+	movl	%edx, 4(%esp)	/* args */
+	leal	-12(%ebp), %edx
+	movl	%edx, (%esp)	/* &resp */
+	call	_ffi_closure_SYSV_inner
+	movl	-12(%ebp), %ecx
+	jmp     .Lcls_return_result
+.ffi_closure_STDCALL_end:
+
         # This assumes we are using gas.
         .balign 16
 	.globl	_ffi_closure_SYSV
@@ -283,6 +299,7 @@
 	movl	%edx, (%esp)	/* &resp */
 	call	_ffi_closure_SYSV_inner
 	movl	-12(%ebp), %ecx
+.Lcls_return_result:
 	cmpl	$FFI_TYPE_INT, %eax
 	je	.Lcls_retint
 	cmpl	$FFI_TYPE_FLOAT, %eax
@@ -392,70 +409,6 @@

 #endif /* !FFI_NO_RAW_API */

-        # This assumes we are using gas.
-	.balign	16
-	.globl	_ffi_closure_STDCALL
-	.def	_ffi_closure_STDCALL;	.scl	2;	.type	32;	.endef
-_ffi_closure_STDCALL:
-.LFB5:
-	pushl	%ebp
-.LCFI9:
-	movl	%esp, %ebp
-.LCFI10:
-	subl	$40, %esp
-	leal	-24(%ebp), %edx
-	movl	%edx, -12(%ebp)	/* resp */
-	leal	12(%ebp), %edx  /* account for stub return address on stack */
-	movl	%edx, 4(%esp)	/* args */
-	leal	-12(%ebp), %edx
-	movl	%edx, (%esp)	/* &resp */
-	call	_ffi_closure_SYSV_inner
-	movl	-12(%ebp), %ecx
-	/* It would be nice to just share this code with the
-	   duplicate sequence in _ffi_closure_SYSV, if only
-	   there were some way to represent that in the EH info.  */
-	cmpl	$FFI_TYPE_INT, %eax
-	je	.Lscls_retint
-	cmpl	$FFI_TYPE_FLOAT, %eax
-	je	.Lscls_retfloat
-	cmpl	$FFI_TYPE_DOUBLE, %eax
-	je	.Lscls_retdouble
-	cmpl	$FFI_TYPE_LONGDOUBLE, %eax
-	je	.Lscls_retldouble
-	cmpl	$FFI_TYPE_SINT64, %eax
-	je	.Lscls_retllong
-	cmpl	$FFI_TYPE_SINT8, %eax	/* 1-byte struct */
-	je	.Lscls_retstruct1
-	cmpl	$FFI_TYPE_SINT16, %eax	/* 2-bytes struct */
-	je	.Lscls_retstruct2
-.Lscls_epilogue:
-	movl	%ebp, %esp
-	popl	%ebp
-	ret
-.Lscls_retint:
-	movl	(%ecx), %eax
-	jmp	.Lscls_epilogue
-.Lscls_retfloat:
-	flds	(%ecx)
-	jmp	.Lscls_epilogue
-.Lscls_retdouble:
-	fldl	(%ecx)
-	jmp	.Lscls_epilogue
-.Lscls_retldouble:
-	fldt	(%ecx)
-	jmp	.Lscls_epilogue
-.Lscls_retllong:
-	movl	(%ecx), %eax
-	movl	4(%ecx), %edx
-	jmp	.Lscls_epilogue
-.Lscls_retstruct1:
-	movsbl	(%ecx), %eax
-	jmp	.Lscls_epilogue
-.Lscls_retstruct2:
-	movswl	(%ecx), %eax
-	jmp	.Lscls_epilogue
-.ffi_closure_STDCALL_end:
-.LFE5:

 	.section	.eh_frame,"w"
 .Lframe1:
@@ -618,34 +571,3 @@
 .LEFDE4:

 #endif /* !FFI_NO_RAW_API */
-
-.LSFDE5:
-	.long	.LEFDE5-.LASFDE5	/* FDE Length */
-.LASFDE5:
-	.long	.LASFDE5-.Lframe1	/* FDE CIE offset */
-#if defined __PIC__ && defined HAVE_AS_X86_PCREL
-	.long	.LFB5-.	/* FDE initial location */
-#else
-	.long	.LFB5
-#endif
-	.long	.LFE5-.LFB5	/* FDE address range */
-#ifdef __PIC__
-	.byte	0x0	/* .uleb128 0x0; Augmentation size */
-#endif
-	/* DW_CFA_xxx CFI instructions go here.  */
-
-	.byte	0x4	/* DW_CFA_advance_loc4 */
-	.long	.LCFI9-.LFB5
-	.byte	0xe	/* DW_CFA_def_cfa_offset CFA = r4 + 8 = 8(%esp) */
-	.byte	0x8	/* .uleb128 0x8 */
-	.byte	0x85	/* DW_CFA_offset, column 0x5 %ebp at CFA + 2 * -4 */
-	.byte	0x2	/* .uleb128 0x2 */
-
-	.byte	0x4	/* DW_CFA_advance_loc4 */
-	.long	.LCFI10-.LCFI9
-	.byte	0xd	/* DW_CFA_def_cfa_register CFA = r5 = %ebp */
-	.byte	0x5	/* .uleb128 0x5 */
-
-	/* End of DW_CFA_xxx CFI instructions.  */
-	.align 4
-.LEFDE5:


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