Import from libffi master repository.

2017-08-31  Tony Reix  <tony.reix@atos.net>

        * src/powerpc/aix.S (ffi_call_AIX): Add debugging pseudo-op and
        labels for EH.
        (ffi_call_go_AIX): New function.
        (_GLOBAL__F_libffi_src_powerpc_aix): New EH frame.
        * src/powerpc/aix_closure.S (ffi_closure_ASM): Add debugging
        pseudo-op and labels for EH.
        (ffi_go_closure_ASM): New function.
        (_GLOBAL__F_libffi_src_powerpc_aix_closure): New EH frame.
        * src/powrpc/ffi_darwin.c (ffi_call_go): New function.
        (ffi_prep_go_closure): New function.
        (ffi_closure_helper_common): Rename from ffi_closure_helper_DARWIN.
        (ffi_closure_helper_DARWIN): Call ffi_closure_helper_common.
        (ffi_go_closure_helper_DARWIN): Call ffi_closure_helper_common.
        * src/powerpc/ffitarget.h (FFI_GO_CLOSURES): Define.

From-SVN: r253386

5 files changed, 595 insertions, 9 deletions

diff --git a/libffi/ChangeLog b/libffi/ChangeLog
index e73b93b5470..f7de95059b1 100644
--- a/libffi/ChangeLog
+++ b/libffi/ChangeLog
@@ -1,3 +1,20 @@
+2017-08-31  Tony Reix  <tony.reix@atos.net>
+
+	* src/powerpc/aix.S (ffi_call_AIX): Add debugging pseudo-op and
+	labels for EH.
+	(ffi_call_go_AIX): New function.
+	(_GLOBAL__F_libffi_src_powerpc_aix): New EH frame.
+	* src/powerpc/aix_closure.S (ffi_closure_ASM): Add debugging
+	pseudo-op and labels for EH.
+	(ffi_go_closure_ASM): New function.
+	(_GLOBAL__F_libffi_src_powerpc_aix_closure): New EH frame.
+	* src/powrpc/ffi_darwin.c (ffi_call_go): New function.
+	(ffi_prep_go_closure): New function.
+	(ffi_closure_helper_common): Rename from ffi_closure_helper_DARWIN.
+	(ffi_closure_helper_DARWIN): Call ffi_closure_helper_common.
+	(ffi_go_closure_helper_DARWIN): Call ffi_closure_helper_common.
+	* src/powerpc/ffitarget.h (FFI_GO_CLOSURES): Define.
+
 2017-01-21  Jakub Jelinek  <jakub@redhat.com>
 
 	PR other/79046
diff --git a/libffi/src/powerpc/aix.S b/libffi/src/powerpc/aix.S
index 349e78c266e..7ba541595f2 100644
--- a/libffi/src/powerpc/aix.S
+++ b/libffi/src/powerpc/aix.S
@@ -106,6 +106,10 @@ ffi_call_AIX:
 	.llong .ffi_call_AIX, TOC[tc0], 0
 	.csect .text[PR]
 .ffi_call_AIX:
+	.function .ffi_call_AIX,.ffi_call_AIX,16,044,LFE..0-LFB..0
+	.bf __LINE__
+	.line 1
+LFB..0:
 	/* Save registers we use.  */
 	mflr	r0
 
@@ -115,8 +119,10 @@ ffi_call_AIX:
 	std	r31, -8(r1)
 
 	std	r0, 16(r1)
+LCFI..0:
 	mr	r28, r1		/* our AP.  */
 	stdux	r1, r1, r4
+LCFI..1:
 
 	/* Save arguments over call...  */
 	mr	r31, r5	/* flags, */
@@ -202,12 +208,16 @@ L(fp_return_value):
 L(float_return_value):
 	stfs	f1, 0(r30)
 	b	L(done_return_value)
-
+LFE..0:
 #else /* ! __64BIT__ */
 	
 	.long .ffi_call_AIX, TOC[tc0], 0
 	.csect .text[PR]
 .ffi_call_AIX:
+	.function .ffi_call_AIX,.ffi_call_AIX,16,044,LFE..0-LFB..0
+	.bf __LINE__
+	.line 1
+LFB..0:
 	/* Save registers we use.  */
 	mflr	r0
 
@@ -217,8 +227,10 @@ L(float_return_value):
 	stw	r31, -4(r1)
 
 	stw	r0, 8(r1)
+LCFI..0:
 	mr	r28, r1		/* out AP.  */
 	stwux	r1, r1, r4
+LCFI..1:
 
 	/* Save arguments over call...  */
 	mr	r31, r5	/* flags, */
@@ -304,11 +316,144 @@ L(fp_return_value):
 L(float_return_value):
 	stfs	f1, 0(r30)
 	b	L(done_return_value)
+LFE..0:
 #endif
+	.ef __LINE__
 	.long 0
 	.byte 0,0,0,1,128,4,0,0
 /* END(ffi_call_AIX) */
 
+	/* void ffi_call_go_AIX(extended_cif *ecif, unsigned long bytes,
+	 *		        unsigned int flags, unsigned int *rvalue,
+	 *		        void (*fn)(),
+	 *		        void (*prep_args)(extended_cif*, unsigned *const),
+	 *                      void *closure);
+	 * r3=ecif, r4=bytes, r5=flags, r6=rvalue, r7=fn, r8=prep_args, r9=closure
+	 */
+
+.csect .text[PR]
+	.align 2
+	.globl ffi_call_go_AIX
+	.globl .ffi_call_go_AIX
+.csect ffi_call_go_AIX[DS]
+ffi_call_go_AIX:
+#ifdef __64BIT__
+	.llong .ffi_call_go_AIX, TOC[tc0], 0
+	.csect .text[PR]
+.ffi_call_go_AIX:
+	.function .ffi_call_go_AIX,.ffi_call_go_AIX,16,044,LFE..1-LFB..1
+	.bf __LINE__
+	.line 1
+LFB..1:
+	/* Save registers we use.  */
+	mflr	r0
+
+	std	r28,-32(r1)
+	std	r29,-24(r1)
+	std	r30,-16(r1)
+	std	r31, -8(r1)
+
+	std	r9, 8(r1)	/* closure, saved in cr field. */
+	std	r0, 16(r1)
+LCFI..2:
+	mr	r28, r1		/* our AP.  */
+	stdux	r1, r1, r4
+LCFI..3:
+
+	/* Save arguments over call...  */
+	mr	r31, r5	/* flags, */
+	mr	r30, r6	/* rvalue, */
+	mr	r29, r7	/* function address,  */
+	std	r2, 40(r1)
+
+	/* Call ffi_prep_args.  */
+	mr	r4, r1
+	bl	.ffi_prep_args
+	nop
+
+	/* Now do the call.  */
+	ld	r0, 0(r29)
+	ld	r2, 8(r29)
+	ld      r11, 8(r28)	/* closure */
+	/* Set up cr1 with bits 4-7 of the flags.  */
+	mtcrf	0x40, r31
+	mtctr	r0
+	/* Load all those argument registers.  */
+	/* We have set up a nice stack frame, just load it into registers. */
+	ld	r3, 40+(1*8)(r1)
+	ld	r4, 40+(2*8)(r1)
+	ld	r5, 40+(3*8)(r1)
+	ld	r6, 40+(4*8)(r1)
+	nop
+	ld	r7, 40+(5*8)(r1)
+	ld	r8, 40+(6*8)(r1)
+	ld	r9, 40+(7*8)(r1)
+	ld	r10,40+(8*8)(r1)
+
+	b	L1
+LFE..1:
+#else /* ! __64BIT__ */
+	
+	.long .ffi_call_go_AIX, TOC[tc0], 0
+	.csect .text[PR]
+.ffi_call_go_AIX:
+	.function .ffi_call_go_AIX,.ffi_call_go_AIX,16,044,LFE..1-LFB..1
+	.bf __LINE__
+	.line 1
+	/* Save registers we use.  */
+LFB..1:
+	mflr	r0
+
+	stw	r28,-16(r1)
+	stw	r29,-12(r1)
+	stw	r30, -8(r1)
+	stw	r31, -4(r1)
+
+	stw	r9, 4(r1)	/* closure, saved in cr field.  */
+	stw	r0, 8(r1)
+LCFI..2:
+	mr	r28, r1		/* out AP.  */
+	stwux	r1, r1, r4
+LCFI..3:
+
+	/* Save arguments over call...  */
+	mr	r31, r5	/* flags, */
+	mr	r30, r6	/* rvalue, */
+	mr	r29, r7	/* function address, */
+	stw	r2, 20(r1)
+
+	/* Call ffi_prep_args.  */
+	mr	r4, r1
+	bl	.ffi_prep_args
+	nop
+
+	/* Now do the call.  */
+	lwz	r0, 0(r29)
+	lwz	r2, 4(r29)
+	lwz	r11, 4(r28)	/* closure */
+	/* Set up cr1 with bits 4-7 of the flags.  */
+	mtcrf	0x40, r31
+	mtctr	r0
+	/* Load all those argument registers.  */
+	/* We have set up a nice stack frame, just load it into registers. */
+	lwz	r3, 20+(1*4)(r1)
+	lwz	r4, 20+(2*4)(r1)
+	lwz	r5, 20+(3*4)(r1)
+	lwz	r6, 20+(4*4)(r1)
+	nop
+	lwz	r7, 20+(5*4)(r1)
+	lwz	r8, 20+(6*4)(r1)
+	lwz	r9, 20+(7*4)(r1)
+	lwz	r10,20+(8*4)(r1)
+
+	b	L1
+LFE..1:
+#endif
+	.ef __LINE__
+	.long 0
+	.byte 0,0,0,1,128,4,0,0
+/* END(ffi_call_go_AIX) */
+
 .csect .text[PR]
 	.align 2
 	.globl ffi_call_DARWIN
@@ -326,3 +471,96 @@ ffi_call_DARWIN:
 	.long 0
 	.byte 0,0,0,0,0,0,0,0
 /* END(ffi_call_DARWIN) */
+
+/* EH frame stuff.  */
+
+#define LR_REGNO		0x41		/* Link Register (65), see rs6000.md */
+#ifdef __64BIT__
+#define PTRSIZE			8
+#define LOG2_PTRSIZE		3
+#define FDE_ENCODING		0x1c		/* DW_EH_PE_pcrel|DW_EH_PE_sdata8 */
+#define EH_DATA_ALIGN_FACT	0x78		/* LEB128 -8 */
+#else
+#define PTRSIZE			4
+#define LOG2_PTRSIZE		2
+#define FDE_ENCODING		0x1b		/* DW_EH_PE_pcrel|DW_EH_PE_sdata4 */
+#define EH_DATA_ALIGN_FACT	0x7c		/* LEB128 -4 */
+#endif
+	.csect	_unwind.ro_[RO],4
+	.align	LOG2_PTRSIZE
+	.globl	_GLOBAL__F_libffi_src_powerpc_aix
+_GLOBAL__F_libffi_src_powerpc_aix:
+Lframe..1:
+	.vbyte	4,LECIE..1-LSCIE..1	/* CIE Length */
+LSCIE..1:
+	.vbyte	4,0			/* CIE Identifier Tag */
+	.byte	0x3			/* CIE Version */
+	.byte	"zR"			/* CIE Augmentation */
+	.byte	0
+	.byte	0x1			/* uleb128 0x1; CIE Code Alignment Factor */
+	.byte	EH_DATA_ALIGN_FACT	/* leb128 -4/-8; CIE Data Alignment Factor */
+	.byte	0x41			/* CIE RA Column */
+	.byte	0x1			/* uleb128 0x1; Augmentation size */
+	.byte	FDE_ENCODING		/* FDE Encoding (pcrel|sdata4/8) */
+	.byte	0xc			/* DW_CFA_def_cfa */
+	.byte	0x1			/*     uleb128 0x1; Register r1 */
+	.byte	0			/*     uleb128 0x0; Offset 0 */
+	.align	LOG2_PTRSIZE
+LECIE..1:
+LSFDE..1:
+	.vbyte	4,LEFDE..1-LASFDE..1	/* FDE Length */
+LASFDE..1:
+	.vbyte	4,LASFDE..1-Lframe..1	/* FDE CIE offset */
+	.vbyte	PTRSIZE,LFB..0-$	/* FDE initial location */
+	.vbyte	PTRSIZE,LFE..0-LFB..0	/* FDE address range */
+	.byte   0			/* uleb128 0x0; Augmentation size */
+	.byte	0x4			/* DW_CFA_advance_loc4 */
+	.vbyte	4,LCFI..0-LFB..0
+	.byte	0x11			/* DW_CFA_def_offset_extended_sf */
+	.byte	LR_REGNO		/*     uleb128 LR_REGNO; Register LR */
+	.byte	0x7e			/*     leb128 -2; Offset -2 (8/16) */
+	.byte	0x9f			/* DW_CFA_offset Register r31 */
+	.byte	0x1			/*     uleb128 0x1; Offset 1 (-4/-8) */
+	.byte	0x9e			/* DW_CFA_offset Register r30 */
+	.byte	0x2			/*     uleb128 0x2; Offset 2 (-8/-16) */
+	.byte	0x9d			/* DW_CFA_offset Register r29 */
+	.byte	0x3			/*     uleb128 0x3; Offset 3 (-12/-24) */
+	.byte	0x9c			/* DW_CFA_offset Register r28 */
+	.byte	0x4			/*     uleb128 0x4; Offset 4 (-16/-32) */
+	.byte	0x4			/* DW_CFA_advance_loc4 */
+	.vbyte	4,LCFI..1-LCFI..0
+	.byte	0xd			/* DW_CFA_def_cfa_register */
+	.byte	0x1c			/*     uleb128 28; Register r28 */
+	.align	LOG2_PTRSIZE
+LEFDE..1:
+LSFDE..2:
+	.vbyte	4,LEFDE..2-LASFDE..2	/* FDE Length */
+LASFDE..2:
+	.vbyte	4,LASFDE..2-Lframe..1	/* FDE CIE offset */
+	.vbyte	PTRSIZE,LFB..1-$	/* FDE initial location */
+	.vbyte	PTRSIZE,LFE..1-LFB..1	/* FDE address range */
+	.byte   0			/* uleb128 0x0; Augmentation size */
+	.byte	0x4			/* DW_CFA_advance_loc4 */
+	.vbyte	4,LCFI..2-LFB..1
+	.byte	0x11			/* DW_CFA_def_offset_extended_sf */
+	.byte	LR_REGNO		/*     uleb128 LR_REGNO; Register LR */
+	.byte	0x7e			/*     leb128 -2; Offset -2 (8/16) */
+	.byte	0x9f			/* DW_CFA_offset Register r31 */
+	.byte	0x1			/*     uleb128 0x1; Offset 1 (-4/-8) */
+	.byte	0x9e			/* DW_CFA_offset Register r30 */
+	.byte	0x2			/*     uleb128 0x2; Offset 2 (-8/-16) */
+	.byte	0x9d			/* DW_CFA_offset Register r29 */
+	.byte	0x3			/*     uleb128 0x3; Offset 3 (-12/-24) */
+	.byte	0x9c			/* DW_CFA_offset Register r28 */
+	.byte	0x4			/*     uleb128 0x4; Offset 4 (-16/-32) */
+	.byte	0x4			/* DW_CFA_advance_loc4 */
+	.vbyte	4,LCFI..3-LCFI..2
+	.byte	0xd			/* DW_CFA_def_cfa_register */
+	.byte	0x1c			/*     uleb128 28; Register r28 */
+	.align	LOG2_PTRSIZE
+LEFDE..2:
+	.vbyte	4,0			/* End of FDEs */
+
+	.csect	.text[PR]
+	.ref	_GLOBAL__F_libffi_src_powerpc_aix	/* Prevents garbage collection by AIX linker */
+
diff --git a/libffi/src/powerpc/aix_closure.S b/libffi/src/powerpc/aix_closure.S
index aabd3c3c1ee..132c785eddc 100644
--- a/libffi/src/powerpc/aix_closure.S
+++ b/libffi/src/powerpc/aix_closure.S
@@ -80,6 +80,7 @@
 	.set f21,21
 
 	.extern .ffi_closure_helper_DARWIN
+	.extern .ffi_go_closure_helper_DARWIN
 
 #define LIBFFI_ASM
 #define JUMPTARGET(name) name
@@ -101,6 +102,10 @@ ffi_closure_ASM:
 	.llong .ffi_closure_ASM, TOC[tc0], 0
 	.csect .text[PR]
 .ffi_closure_ASM:
+	.function .ffi_closure_ASM,.ffi_closure_ASM,16,044,LFE..0-LFB..0
+	.bf __LINE__
+	.line 1
+LFB..0:
 /* we want to build up an area for the parameters passed */
 /* in registers (both floating point and integer) */
 
@@ -117,8 +122,7 @@ ffi_closure_ASM:
 	std   r9, 48+(6*8)(r1)
 	std   r10, 48+(7*8)(r1)
 	std   r0, 16(r1)	/* save the return address */
-
-
+LCFI..0:
 	/* 48  Bytes (Linkage Area) */
 	/* 64  Bytes (params) */
 	/* 16  Bytes (result) */
@@ -128,6 +132,7 @@ ffi_closure_ASM:
 
 	stdu  r1, -240(r1)	/* skip over caller save area
 				   keep stack aligned to 16  */
+LCFI..1:
 
 	/* next save fpr 1 to fpr 13 (aligned to 8) */
 	stfd  f1, 128+(0*8)(r1)
@@ -161,6 +166,8 @@ ffi_closure_ASM:
 	bl .ffi_closure_helper_DARWIN
 	nop
 
+.Ldoneclosure:
+
 	/* now r3 contains the return type */
 	/* so use it to look up in a table */
 	/* so we know how to deal with each type */
@@ -270,12 +277,17 @@ L..finish:
 	mtlr r0
 	addi r1, r1, 240
 	blr
+LFE..0:
 
 #else /* ! __64BIT__ */
 	
 	.long .ffi_closure_ASM, TOC[tc0], 0
 	.csect .text[PR]
 .ffi_closure_ASM:
+	.function .ffi_closure_ASM,.ffi_closure_ASM,16,044,LFE..0-LFB..0
+	.bf __LINE__
+	.line 1
+LFB..0:
 /* we want to build up an area for the parameters passed */
 /* in registers (both floating point and integer) */
 
@@ -292,7 +304,7 @@ L..finish:
 	stw   r9, 24+(6*4)(r1)
 	stw   r10, 24+(7*4)(r1)
 	stw   r0, 8(r1)
-
+LCFI..0:
 	/* 24 Bytes (Linkage Area) */
 	/* 32 Bytes (params) */
 	/* 16  Bytes (result) */
@@ -301,6 +313,7 @@ L..finish:
 
 	stwu  r1, -176(r1)	/* skip over caller save area
 				   keep stack aligned to 16  */
+LCFI..1:
 
 	/* next save fpr 1 to fpr 13 (aligned to 8) */
 	stfd  f1, 72+(0*8)(r1)
@@ -334,6 +347,8 @@ L..finish:
 	bl .ffi_closure_helper_DARWIN
 	nop
 
+.Ldoneclosure:
+
 	/* now r3 contains the return type */
 	/* so use it to look up in a table */
 	/* so we know how to deal with each type */
@@ -443,5 +458,237 @@ L..60:
 L..finish:
 	addi r1, r1, 176
 	blr
+LFE..0:
 #endif
+	.ef __LINE__
 /* END(ffi_closure_ASM) */
+
+
+.csect .text[PR]
+	.align 2
+	.globl ffi_go_closure_ASM
+	.globl .ffi_go_closure_ASM
+.csect ffi_go_closure_ASM[DS]
+ffi_go_closure_ASM:
+#ifdef __64BIT__
+	.llong .ffi_go_closure_ASM, TOC[tc0], 0
+	.csect .text[PR]
+.ffi_go_closure_ASM:
+	.function .ffi_go_closure_ASM,.ffi_go_closure_ASM,16,044,LFE..1-LFB..1
+	.bf __LINE__
+	.line 1
+LFB..1:
+/* we want to build up an area for the parameters passed */
+/* in registers (both floating point and integer) */
+
+	/* we store gpr 3 to gpr 10 (aligned to 4)
+	in the parents outgoing area  */
+	std   r3, 48+(0*8)(r1)
+	std   r4, 48+(1*8)(r1)
+	std   r5, 48+(2*8)(r1)
+	std   r6, 48+(3*8)(r1)
+	mflr  r0
+
+	std   r7, 48+(4*8)(r1)
+	std   r8, 48+(5*8)(r1)
+	std   r9, 48+(6*8)(r1)
+	std   r10, 48+(7*8)(r1)
+	std   r0, 16(r1)	/* save the return address */
+LCFI..2:
+	/* 48  Bytes (Linkage Area) */
+	/* 64  Bytes (params) */
+	/* 16  Bytes (result) */
+	/* 104 Bytes (13*8 from FPR) */
+	/* 8   Bytes (alignment) */
+	/* 240 Bytes */
+
+	stdu  r1, -240(r1)	/* skip over caller save area
+				   keep stack aligned to 16  */
+LCFI..3:
+
+	/* next save fpr 1 to fpr 13 (aligned to 8) */
+	stfd  f1, 128+(0*8)(r1)
+	stfd  f2, 128+(1*8)(r1)
+	stfd  f3, 128+(2*8)(r1)
+	stfd  f4, 128+(3*8)(r1)
+	stfd  f5, 128+(4*8)(r1)
+	stfd  f6, 128+(5*8)(r1)
+	stfd  f7, 128+(6*8)(r1)
+	stfd  f8, 128+(7*8)(r1)
+	stfd  f9, 128+(8*8)(r1)
+	stfd  f10, 128+(9*8)(r1)
+	stfd  f11, 128+(10*8)(r1)
+	stfd  f12, 128+(11*8)(r1)
+	stfd  f13, 128+(12*8)(r1)
+
+	/* set up registers for the routine that actually does the work */
+	mr r3, r11	/* go closure */
+
+	/* now load up the pointer to the result storage */
+	addi r4, r1, 112
+
+	/* now load up the pointer to the saved gpr registers */
+	addi r5, r1, 288
+
+	/* now load up the pointer to the saved fpr registers */
+	addi r6, r1, 128
+
+	/* make the call */
+	bl .ffi_go_closure_helper_DARWIN
+	nop
+
+	b .Ldoneclosure
+LFE..1:
+
+#else /* ! __64BIT__ */
+	
+	.long .ffi_go_closure_ASM, TOC[tc0], 0
+	.csect .text[PR]
+.ffi_go_closure_ASM:
+	.function .ffi_go_closure_ASM,.ffi_go_closure_ASM,16,044,LFE..1-LFB..1
+	.bf __LINE__
+	.line 1
+LFB..1:
+/* we want to build up an area for the parameters passed */
+/* in registers (both floating point and integer) */
+
+	/* we store gpr 3 to gpr 10 (aligned to 4)
+	in the parents outgoing area  */
+	stw   r3, 24+(0*4)(r1)
+	stw   r4, 24+(1*4)(r1)
+	stw   r5, 24+(2*4)(r1)
+	stw   r6, 24+(3*4)(r1)
+	mflr  r0
+
+	stw   r7, 24+(4*4)(r1)
+	stw   r8, 24+(5*4)(r1)
+	stw   r9, 24+(6*4)(r1)
+	stw   r10, 24+(7*4)(r1)
+	stw   r0, 8(r1)
+LCFI..2:
+	/* 24 Bytes (Linkage Area) */
+	/* 32 Bytes (params) */
+	/* 16  Bytes (result) */
+	/* 104 Bytes (13*8 from FPR) */
+	/* 176 Bytes */
+
+	stwu  r1, -176(r1)	/* skip over caller save area
+				   keep stack aligned to 16  */
+LCFI..3:
+
+	/* next save fpr 1 to fpr 13 (aligned to 8) */
+	stfd  f1, 72+(0*8)(r1)
+	stfd  f2, 72+(1*8)(r1)
+	stfd  f3, 72+(2*8)(r1)
+	stfd  f4, 72+(3*8)(r1)
+	stfd  f5, 72+(4*8)(r1)
+	stfd  f6, 72+(5*8)(r1)
+	stfd  f7, 72+(6*8)(r1)
+	stfd  f8, 72+(7*8)(r1)
+	stfd  f9, 72+(8*8)(r1)
+	stfd  f10, 72+(9*8)(r1)
+	stfd  f11, 72+(10*8)(r1)
+	stfd  f12, 72+(11*8)(r1)
+	stfd  f13, 72+(12*8)(r1)
+
+	/* set up registers for the routine that actually does the work */
+	mr   r3, 11	/* go closure */
+
+	/* now load up the pointer to the result storage */
+	addi r4, r1, 56
+
+	/* now load up the pointer to the saved gpr registers */
+	addi r5, r1, 200
+
+	/* now load up the pointer to the saved fpr registers */
+	addi r6, r1, 72
+
+	/* make the call */
+	bl .ffi_go_closure_helper_DARWIN
+	nop
+
+	b    .Ldoneclosure
+LFE..1:
+#endif
+	.ef __LINE__
+/* END(ffi_go_closure_ASM) */
+
+/* EH frame stuff.  */
+
+#define LR_REGNO		0x41		/* Link Register (65), see rs6000.md */
+#ifdef __64BIT__
+#define PTRSIZE			8
+#define LOG2_PTRSIZE		3
+#define CFA_OFFSET		0xf0,0x01	/* LEB128 240 */
+#define FDE_ENCODING		0x1c		/* DW_EH_PE_pcrel|DW_EH_PE_sdata8 */
+#define EH_DATA_ALIGN_FACT	0x78		/* LEB128 -8 */
+#else
+#define PTRSIZE			4
+#define LOG2_PTRSIZE		2
+#define CFA_OFFSET		0xb0,0x01	/* LEB128 176 */
+#define FDE_ENCODING		0x1b		/* DW_EH_PE_pcrel|DW_EH_PE_sdata4 */
+#define EH_DATA_ALIGN_FACT	0x7c		/* LEB128 -4 */
+#endif
+
+	.csect	_unwind.ro_[RO],4
+	.align	LOG2_PTRSIZE
+	.globl	_GLOBAL__F_libffi_src_powerpc_aix_closure
+_GLOBAL__F_libffi_src_powerpc_aix_closure:
+Lframe..1:
+	.vbyte	4,LECIE..1-LSCIE..1	/* CIE Length */
+LSCIE..1:
+	.vbyte	4,0			/* CIE Identifier Tag */
+	.byte	0x3			/* CIE Version */
+	.byte	"zR"			/* CIE Augmentation */
+	.byte	0
+	.byte	0x1			/* uleb128 0x1; CIE Code Alignment Factor */
+	.byte	EH_DATA_ALIGN_FACT	/* leb128 -4/-8; CIE Data Alignment Factor */
+	.byte	LR_REGNO		/* CIE RA Column */
+	.byte	0x1			/* uleb128 0x1; Augmentation size */
+	.byte	FDE_ENCODING		/* FDE Encoding (pcrel|sdata4/8) */
+	.byte	0xc			/* DW_CFA_def_cfa */
+	.byte	0x1			/*     uleb128 0x1; Register r1 */
+	.byte	0			/*     uleb128 0x0; Offset 0 */
+	.align	LOG2_PTRSIZE
+LECIE..1:
+LSFDE..1:
+	.vbyte	4,LEFDE..1-LASFDE..1	/* FDE Length */
+LASFDE..1:
+	.vbyte	4,LASFDE..1-Lframe..1	/* FDE CIE offset */
+	.vbyte	PTRSIZE,LFB..0-$	/* FDE initial location */
+	.vbyte	PTRSIZE,LFE..0-LFB..0	/* FDE address range */
+	.byte	0			/* uleb128 0x0; Augmentation size */
+	.byte	0x4			/* DW_CFA_advance_loc4 */
+	.vbyte	4,LCFI..1-LCFI..0
+	.byte	0xe			/* DW_CFA_def_cfa_offset */
+	.byte	CFA_OFFSET		/*     uleb128 176/240 */
+	.byte	0x4			/* DW_CFA_advance_loc4 */
+	.vbyte	4,LCFI..0-LFB..0
+	.byte	0x11			/* DW_CFA_offset_extended_sf */
+	.byte	LR_REGNO		/*     uleb128 LR_REGNO; Register LR */
+	.byte	0x7e			/*     leb128 -2; Offset -2 (8/16) */
+	.align	LOG2_PTRSIZE
+LEFDE..1:
+LSFDE..2:
+	.vbyte	4,LEFDE..2-LASFDE..2	/* FDE Length */
+LASFDE..2:
+	.vbyte	4,LASFDE..2-Lframe..1	/* FDE CIE offset */
+	.vbyte	PTRSIZE,LFB..1-$	/* FDE initial location */
+	.vbyte	PTRSIZE,LFE..1-LFB..1	/* FDE address range */
+	.byte	0			/* uleb128 0x0; Augmentation size */
+	.byte	0x4			/* DW_CFA_advance_loc4 */
+	.vbyte	4,LCFI..3-LCFI..2
+	.byte	0xe			/* DW_CFA_def_cfa_offset */
+	.byte	CFA_OFFSET		/*     uleb128 176/240 */
+	.byte	0x4			/* DW_CFA_advance_loc4 */
+	.vbyte	4,LCFI..2-LFB..1
+	.byte	0x11			/* DW_CFA_offset_extended_sf */
+	.byte	LR_REGNO		/*     uleb128 LR_REGNO; Register LR */
+	.byte	0x7e			/*     leb128 -2; Offset -2 (8/16) */
+	.align	LOG2_PTRSIZE
+LEFDE..2:
+	.vbyte	4,0			/* End of FDEs */
+
+	.csect	.text[PR]
+	.ref	_GLOBAL__F_libffi_src_powerpc_aix_closure	/* Prevents garbage collection by AIX linker */
+
diff --git a/libffi/src/powerpc/ffi_darwin.c b/libffi/src/powerpc/ffi_darwin.c
index cf6fb6d4b7c..6588e3cad08 100644
--- a/libffi/src/powerpc/ffi_darwin.c
+++ b/libffi/src/powerpc/ffi_darwin.c
@@ -33,6 +33,7 @@
 #include <stdlib.h>
 
 extern void ffi_closure_ASM (void);
+extern void ffi_go_closure_ASM (void);
 
 enum {
   /* The assembly depends on these exact flags.  
@@ -908,6 +909,9 @@ ffi_prep_cif_machdep (ffi_cif *cif)
 extern void ffi_call_AIX(extended_cif *, long, unsigned, unsigned *,
 			 void (*fn)(void), void (*fn2)(void));
 
+extern void ffi_call_go_AIX(extended_cif *, long, unsigned, unsigned *,
+			    void (*fn)(void), void (*fn2)(void), void *closure);
+
 extern void ffi_call_DARWIN(extended_cif *, long, unsigned, unsigned *,
 			    void (*fn)(void), void (*fn2)(void), ffi_type*);
 
@@ -946,6 +950,38 @@ ffi_call (ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue)
     }
 }
 
+void
+ffi_call_go (ffi_cif *cif, void (*fn) (void), void *rvalue, void **avalue,
+	     void *closure)
+{
+  extended_cif ecif;
+
+  ecif.cif = cif;
+  ecif.avalue = avalue;
+
+  /* If the return value is a struct and we don't have a return
+     value address then we need to make one.  */
+
+  if ((rvalue == NULL) &&
+      (cif->rtype->type == FFI_TYPE_STRUCT))
+    {
+      ecif.rvalue = alloca (cif->rtype->size);
+    }
+  else
+    ecif.rvalue = rvalue;
+
+  switch (cif->abi)
+    {
+    case FFI_AIX:
+      ffi_call_go_AIX(&ecif, -(long)cif->bytes, cif->flags, ecif.rvalue, fn,
+		      FFI_FN(ffi_prep_args), closure);
+      break;
+    default:
+      FFI_ASSERT(0);
+      break;
+    }
+}
+
 static void flush_icache(char *);
 static void flush_range(char *, int);
 
@@ -1074,6 +1110,30 @@ ffi_prep_closure_loc (ffi_closure* closure,
   return FFI_OK;
 }
 
+ffi_status
+ffi_prep_go_closure (ffi_go_closure* closure,
+		     ffi_cif* cif,
+		     void (*fun)(ffi_cif*, void*, void**, void*))
+{
+  switch (cif->abi)
+    {
+      case FFI_AIX:
+
+        FFI_ASSERT (cif->abi == FFI_AIX);
+
+        closure->tramp = (void *)ffi_go_closure_ASM;
+        closure->cif = cif;
+        closure->fun = fun;
+        return FFI_OK;
+      
+      // For now, ffi_prep_go_closure is only implemented for AIX, not for Darwin
+      default:
+        return FFI_BAD_ABI;
+        break;
+    }
+  return FFI_OK;
+}
+
 static void
 flush_icache(char *addr)
 {
@@ -1108,6 +1168,10 @@ ffi_type *
 ffi_closure_helper_DARWIN (ffi_closure *, void *,
 			   unsigned long *, ffi_dblfl *);
 
+ffi_type *
+ffi_go_closure_helper_DARWIN (ffi_go_closure*, void *,
+			      unsigned long *, ffi_dblfl *);
+
 /* Basically the trampoline invokes ffi_closure_ASM, and on
    entry, r11 holds the address of the closure.
    After storing the registers that could possibly contain
@@ -1115,8 +1179,10 @@ ffi_closure_helper_DARWIN (ffi_closure *, void *,
    up space for a return value, ffi_closure_ASM invokes the
    following helper function to do most of the work.  */
 
-ffi_type *
-ffi_closure_helper_DARWIN (ffi_closure *closure, void *rvalue,
+static ffi_type *
+ffi_closure_helper_common (ffi_cif* cif,
+			   void (*fun)(ffi_cif*, void*, void**, void*),
+			   void *user_data, void *rvalue,
 			   unsigned long *pgr, ffi_dblfl *pfr)
 {
   /* rvalue is the pointer to space for return value in closure assembly
@@ -1134,14 +1200,12 @@ ffi_closure_helper_DARWIN (ffi_closure *closure, void *rvalue,
   void **          avalue;
   ffi_type **      arg_types;
   long             i, avn;
-  ffi_cif *        cif;
   ffi_dblfl *      end_pfr = pfr + NUM_FPR_ARG_REGISTERS;
   unsigned         size_al;
 #if defined(POWERPC_DARWIN64)
   unsigned 	   fpsused = 0;
 #endif
 
-  cif = closure->cif;
   avalue = alloca (cif->nargs * sizeof(void *));
 
   if (cif->rtype->type == FFI_TYPE_STRUCT)
@@ -1352,8 +1416,25 @@ ffi_closure_helper_DARWIN (ffi_closure *closure, void *rvalue,
       i++;
     }
 
-  (closure->fun) (cif, rvalue, avalue, closure->user_data);
+  (fun) (cif, rvalue, avalue, user_data);
 
   /* Tell ffi_closure_ASM to perform return type promotions.  */
   return cif->rtype;
 }
+
+ffi_type *
+ffi_closure_helper_DARWIN (ffi_closure *closure, void *rvalue,
+			   unsigned long *pgr, ffi_dblfl *pfr)
+{
+  return ffi_closure_helper_common (closure->cif, closure->fun,
+				    closure->user_data, rvalue, pgr, pfr);
+}
+
+ffi_type *
+ffi_go_closure_helper_DARWIN (ffi_go_closure *closure, void *rvalue,
+			      unsigned long *pgr, ffi_dblfl *pfr)
+{
+  return ffi_closure_helper_common (closure->cif, closure->fun,
+				    closure, rvalue, pgr, pfr);
+}
+
diff --git a/libffi/src/powerpc/ffitarget.h b/libffi/src/powerpc/ffitarget.h
index 0f66d319c77..90aa36b0fce 100644
--- a/libffi/src/powerpc/ffitarget.h
+++ b/libffi/src/powerpc/ffitarget.h
@@ -142,6 +142,9 @@ typedef enum ffi_abi {
 # define FFI_TARGET_SPECIFIC_VARIADIC 1
 # define FFI_EXTRA_CIF_FIELDS unsigned nfixedargs
 #endif
+#if defined (POWERPC_AIX)
+# define FFI_GO_CLOSURES 1
+#endif
 
 /* ppc_closure.S and linux64_closure.S expect this.  */
 #define FFI_PPC_TYPE_LAST FFI_TYPE_POINTER