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Makefile.am (EXTRA_DIST): Add Darwin and AIX closure files.

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2002-03-07  Andreas Tobler  <toa@pop.agri.ch>
	    David Edelsohn  <edelsohn@gnu.org>

	* Makefile.am (EXTRA_DIST): Add Darwin and AIX closure files.
	(TARGET_SRC_POWERPC_AIX): Add aix_closure.S.
	(TARGET_SRC_POWERPC_DARWIN): Add darwin_closure.S.
	* Makefile.in: Regenerate.
	* include/ffi.h.in: Add AIX and Darwin closure definitions.
	* src/powerpc/ffi_darwin.c (ffi_prep_closure): New function.
	(flush_icache, flush_range): New functions.
	(ffi_closure_helper_DARWIN): New function.
	* src/powerpc/aix_closure.S: New file.
	* src/powerpc/darwin_closure.S: New file.

Co-Authored-By: David Edelsohn <edelsohn@gnu.org>

From-SVN: r50408
This commit is contained in:
Andreas Tobler 2002-03-07 19:24:42 +01:00 • committed by David Edelsohn
parent fcf742eac8
commit 073ae293d9
7 changed files with 816 additions and 9 deletions
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14
libffi/ChangeLog
View file

@ -1,3 +1,17 @@
2002-03-07 Andreas Tobler <toa@pop.agri.ch>
David Edelsohn <edelsohn@gnu.org>
* Makefile.am (EXTRA_DIST): Add Darwin and AIX closure files.
(TARGET_SRC_POWERPC_AIX): Add aix_closure.S.
(TARGET_SRC_POWERPC_DARWIN): Add darwin_closure.S.
* Makefile.in: Regenerate.
* include/ffi.h.in: Add AIX and Darwin closure definitions.
* src/powerpc/ffi_darwin.c (ffi_prep_closure): New function.
(flush_icache, flush_range): New functions.
(ffi_closure_helper_DARWIN): New function.
* src/powerpc/aix_closure.S: New file.
* src/powerpc/darwin_closure.S: New file.
2002-02-24 Jeff Sturm <jsturm@one-point.com>
* include/ffi.h.in: Add typedef for ffi_arg.

5
libffi/Makefile.am
View file

@ -14,6 +14,7 @@ EXTRA_DIST = LICENSE ChangeLog.v1 src/mips/ffi.c src/mips/n32.S \
src/powerpc/ppc_closure.S src/powerpc/asm.h \
src/powerpc/ffi_darwin.c \
src/powerpc/darwin.S src/powerpc/aix.S \
src/powerpc/darwin_closure.S src/powerpc/aix_closures.S \
src/arm/ffi.c src/arm/sysv.S
VPATH = @srcdir@:@srcdir@/src:@srcdir@/src/@TARGETDIR@
@ -99,8 +100,8 @@ TARGET_SRC_ALPHA = src/alpha/ffi.c src/alpha/osf.S
TARGET_SRC_IA64 = src/ia64/ffi.c src/ia64/unix.S
TARGET_SRC_M68K = src/m68k/ffi.c src/m68k/sysv.S
TARGET_SRC_POWERPC = src/powerpc/ffi.c src/powerpc/sysv.S src/powerpc/ppc_closure.S
TARGET_SRC_POWERPC_AIX = src/powerpc/ffi_darwin.c src/powerpc/aix.S
TARGET_SRC_POWERPC_DARWIN = src/powerpc/ffi_darwin.c src/powerpc/darwin.S
TARGET_SRC_POWERPC_AIX = src/powerpc/ffi_darwin.c src/powerpc/aix.S src/powerpc/aix_closures.S
TARGET_SRC_POWERPC_DARWIN = src/powerpc/ffi_darwin.c src/powerpc/darwin.S src/powerpc/darwin_closure.S
TARGET_SRC_ARM = src/arm/sysv.S src/arm/ffi.c
##libffi_la_SOURCES = src/debug.c src/prep_cif.c src/types.c $(TARGET_SRC_@TARGET@)

15
libffi/Makefile.in
View file

@ -95,6 +95,7 @@ EXTRA_DIST = LICENSE ChangeLog.v1 src/mips/ffi.c src/mips/n32.S \
src/powerpc/ppc_closure.S src/powerpc/asm.h \
src/powerpc/ffi_darwin.c \
src/powerpc/darwin.S src/powerpc/aix.S \
src/powerpc/darwin_closure.S src/powerpc/aix_closure.S \
src/arm/ffi.c src/arm/sysv.S
@ -170,8 +171,8 @@ TARGET_SRC_ALPHA = src/alpha/ffi.c src/alpha/osf.S
TARGET_SRC_IA64 = src/ia64/ffi.c src/ia64/unix.S
TARGET_SRC_M68K = src/m68k/ffi.c src/m68k/sysv.S
TARGET_SRC_POWERPC = src/powerpc/ffi.c src/powerpc/sysv.S src/powerpc/ppc_closure.S
TARGET_SRC_POWERPC_AIX = src/powerpc/ffi_darwin.c src/powerpc/aix.S
TARGET_SRC_POWERPC_DARWIN = src/powerpc/ffi_darwin.c src/powerpc/darwin.S
TARGET_SRC_POWERPC_AIX = src/powerpc/ffi_darwin.c src/powerpc/aix.S src/powerpc/aix_closure.S
TARGET_SRC_POWERPC_DARWIN = src/powerpc/ffi_darwin.c src/powerpc/darwin.S src/powerpc/darwin_closure.S
TARGET_SRC_ARM = src/arm/sysv.S src/arm/ffi.c
libffi_la_common_SOURCES = src/debug.c src/prep_cif.c src/types.c \
@ -252,11 +253,11 @@ libfficonvenience_la_LIBADD =
@POWERPC_AIX_TRUE@libfficonvenience_la_OBJECTS = src/debug.lo \
@POWERPC_AIX_TRUE@src/prep_cif.lo src/types.lo src/raw_api.lo \
@POWERPC_AIX_TRUE@src/java_raw_api.lo src/powerpc/ffi_darwin.lo \
@POWERPC_AIX_TRUE@src/powerpc/aix.lo
@POWERPC_AIX_TRUE@src/powerpc/aix.lo src/powerpc/aix_closure.lo
@POWERPC_DARWIN_TRUE@libfficonvenience_la_OBJECTS = src/debug.lo \
@POWERPC_DARWIN_TRUE@src/prep_cif.lo src/types.lo src/raw_api.lo \
@POWERPC_DARWIN_TRUE@src/java_raw_api.lo src/powerpc/ffi_darwin.lo \
@POWERPC_DARWIN_TRUE@src/powerpc/darwin.lo
@POWERPC_DARWIN_TRUE@src/powerpc/darwin.lo src/powerpc/darwin_closure.lo
@MIPS_SGI_TRUE@libfficonvenience_la_OBJECTS = src/debug.lo \
@MIPS_SGI_TRUE@src/prep_cif.lo src/types.lo src/raw_api.lo \
@MIPS_SGI_TRUE@src/java_raw_api.lo src/mips/ffi.lo src/mips/o32.lo \
@ -292,10 +293,12 @@ libffi_la_LIBADD =
@IA64_TRUE@src/ia64/ffi.lo src/ia64/unix.lo
@POWERPC_AIX_TRUE@libffi_la_OBJECTS = src/debug.lo src/prep_cif.lo \
@POWERPC_AIX_TRUE@src/types.lo src/raw_api.lo src/java_raw_api.lo \
@POWERPC_AIX_TRUE@src/powerpc/ffi_darwin.lo src/powerpc/aix.lo
@POWERPC_AIX_TRUE@src/powerpc/ffi_darwin.lo src/powerpc/aix.lo \
@POWERPC_AIX_TRUE@src/powerpc/aix_closure.lo
@POWERPC_DARWIN_TRUE@libffi_la_OBJECTS = src/debug.lo src/prep_cif.lo \
@POWERPC_DARWIN_TRUE@src/types.lo src/raw_api.lo src/java_raw_api.lo \
@POWERPC_DARWIN_TRUE@src/powerpc/ffi_darwin.lo src/powerpc/darwin.lo
@POWERPC_DARWIN_TRUE@src/powerpc/ffi_darwin.lo src/powerpc/darwin.lo \
@POWERPC_DARWIN_TRUE@src/powerpc/darwin_closure.lo
@MIPS_SGI_TRUE@libffi_la_OBJECTS = src/debug.lo src/prep_cif.lo \
@MIPS_SGI_TRUE@src/types.lo src/raw_api.lo src/java_raw_api.lo \
@MIPS_SGI_TRUE@src/mips/ffi.lo src/mips/o32.lo src/mips/n32.lo

22
libffi/include/ffi.h.in
View file

@ -412,6 +412,18 @@ struct ffi_ia64_trampoline_struct {
#define FFI_TRAMPOLINE_SIZE 40
#define FFI_NATIVE_RAW_API 0
#elif defined(POWERPC_DARWIN)
#define FFI_CLOSURES 1
#define FFI_TRAMPOLINE_SIZE 40
#define FFI_NATIVE_RAW_API 0
#elif defined(POWERPC_AIX)
#define FFI_CLOSURES 1
#define FFI_TRAMPOLINE_SIZE 24 /* see struct below */
#define FFI_NATIVE_RAW_API 0
#else
#define FFI_CLOSURES 0
@ -419,6 +431,16 @@ struct ffi_ia64_trampoline_struct {
#endif
#if defined(POWERPC_DARWIN) || defined(POWERPC_AIX)
struct ffi_aix_trampoline_struct {
void * code_pointer; /* Pointer to ffi_closure_ASM */
void * toc; /* TOC */
void * static_chain; /* Pointer to closure */
};
#endif
#if FFI_CLOSURES

251
libffi/src/powerpc/aix_closure.S Normal file
View file

@ -0,0 +1,251 @@
/* -----------------------------------------------------------------------
aix_closures.S - Copyright (c) 2002 Free Software Foundation, Inc.
based on darwin_closures.S
PowerPC Assembly glue.
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
``Software''), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
----------------------------------------------------------------------- */
.set r0,0
.set r1,1
.set r2,2
.set r3,3
.set r4,4
.set r5,5
.set r6,6
.set r7,7
.set r8,8
.set r9,9
.set r10,10
.set r11,11
.set r12,12
.set r13,13
.set r14,14
.set r15,15
.set r16,16
.set r17,17
.set r18,18
.set r19,19
.set r20,20
.set r21,21
.set r22,22
.set r23,23
.set r24,24
.set r25,25
.set r26,26
.set r27,27
.set r28,28
.set r29,29
.set r30,30
.set r31,31
.set f0,0
.set f1,1
.set f2,2
.set f3,3
.set f4,4
.set f5,5
.set f6,6
.set f7,7
.set f8,8
.set f9,9
.set f10,10
.set f11,11
.set f12,12
.set f13,13
.set f14,14
.set f15,15
.set f16,16
.set f17,17
.set f18,18
.set f19,19
.set f20,20
.set f21,21
#define LIBFFI_ASM
#define JUMPTARGET(name) name
#define L(x) x
.file "aix_closure.S"
.toc
LC..60:
.tc L..60[TC],L..60
.csect .text[PR]
.align 2
.csect .text[PR]
.align 2
.globl ffi_closure_ASM
.globl .ffi_closure_ASM
.csect ffi_closure_ASM[DS]
ffi_closure_ASM:
.long .ffi_closure_ASM, TOC[tc0], 0
.csect .text[PR]
.ffi_closure_ASM:
mflr r0 /* extract return address */
stw r0, 8(r1) /* save the return address */
/* 24 Bytes (Linkage Area) */
/* 32 Bytes (params) */
/* 104 Bytes (13*8 from FPR) */
/* 4 Bytes (result)
/* 164 Bytes */
stwu r1,-164(r1) /* skip over caller save area */
/* 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, 188(r1)
stw r4, 192(r1)
stw r5, 196(r1)
stw r6, 200(r1)
stw r7, 204(r1)
stw r8, 208(r1)
stw r9, 212(r1)
stw r10, 216(r1)
/* next save fpr 1 to fpr 13 (aligned to 8) */
stfd f1, 56(r1)
stfd f2, 64(r1)
stfd f3, 72(r1)
stfd f4, 80(r1)
stfd f5, 88(r1)
stfd f6, 96(r1)
stfd f7, 104(r1)
stfd f8, 112(r1)
stfd f9, 120(r1)
stfd f10, 128(r1)
stfd f11, 136(r1)
stfd f12, 144(r1)
stfd f13, 152(r1)
/* set up registers for the routine that actually does the work */
/* get the context pointer from the trampoline */
mr r3,r11
/* now load up the pointer to the result storage */
addi r4,r1,160
/* now load up the pointer to the saved gpr registers */
addi r5,r1,188
/* now load up the pointer to the saved fpr registers */
addi r6,r1,56
/* now load up the pointer to the outgoing parameter */
/* stack in the previous frame */
addi r7,r1,220
/* make the call */
bl .ffi_closure_helper_DARWIN
nop
/* now r3 contains the return type */
/* so use it to look up in a table */
/* so we know how to deal with each type */
/* look up the proper starting point in table */
/* by using return type as offset */
addi r5,r1,160 /* get pointer to results area */
lwz r4,LC..60(2) /* get address of jump table */
slwi r3,r3,2 /* now multiply return type by 4 */
lwzx r3,r4,r3 /* get the contents of that table value */
add r3,r3,r4 /* add contents of table to table address */
mtctr r3
bctr /* jump to it */
L..60:
.long L..44-L..60 /* FFI_TYPE_VOID */
.long L..50-L..60 /* FFI_TYPE_INT */
.long L..47-L..60 /* FFI_TYPE_FLOAT */
.long L..46-L..60 /* FFI_TYPE_DOUBLE */
.long L..46-L..60 /* FFI_TYPE_LONGDOUBLE */
.long L..56-L..60 /* FFI_TYPE_UINT8 */
.long L..55-L..60 /* FFI_TYPE_SINT8 */
.long L..58-L..60 /* FFI_TYPE_UINT16 */
.long L..57-L..60 /* FFI_TYPE_SINT16 */
.long L..50-L..60 /* FFI_TYPE_UINT32 */
.long L..50-L..60 /* FFI_TYPE_SINT32 */
.long L..48-L..60 /* FFI_TYPE_UINT64 */
.long L..48-L..60 /* FFI_TYPE_SINT64 */
.long L..44-L..60 /* FFI_TYPE_STRUCT */
.long L..50-L..60 /* FFI_TYPE_POINTER */
/* case double */
L..46:
lfd f1,0(r5)
b L..44
/* case float */
L..47:
lfs f1,0(r5)
b L..44
/* case long long */
L..48:
lwz r3,0(r5)
lwz r4,4(r5)
b L..44
/* case default / int32 / pointer */
L..50:
lwz r3,0(r5)
b L..44
/* case signed int8 */
L..55:
addi r5,r5,3
lbz r3,0(r5)
slwi r3,r3,24
srawi r3,r3,24
b L..44
/* case unsigned int8 */
L..56:
addi r5,r5,3
lbz r3,0(r5)
b L..44
/* case signed int16 */
L..57:
addi r5,r5,2
lhz r3,0(r5)
extsh r3,r3
b L..44
/* case unsigned int16 */
L..58:
addi r5,r5,2
lhz r3,0(r5)
/* case void / done */
L..44:
addi r1,r1,164 /* restore stack pointer */
lwz r0,8(r1) /* get return address */
mtlr r0 /* reset link register */
blr
/* END(ffi_closure_ASM) */

189
libffi/src/powerpc/darwin_closure.S Normal file
View file

@ -0,0 +1,189 @@
/* -----------------------------------------------------------------------
darwin_closures.S - Copyright (c) 2002 Free Software Foundation, Inc.
based on ppc_closures.S
PowerPC Assembly glue.
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
``Software''), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
----------------------------------------------------------------------- */
#define LIBFFI_ASM
#define JUMPTARGET(name) name
#define L(x) x
.text
.globl _ffi_closure_helper_DARWIN
.text
.align 2
.globl _ffi_closure_ASM
.text
.align 2
_ffi_closure_ASM:
mflr r0 /* extract return address */
stw r0, 8(r1) /* save the return address */
/* 24 Bytes (Linkage Area) */
/* 32 Bytes (outgoing parameter area, always reserved) */
/* 104 Bytes (13*8 from FPR) */
/* 4 Bytes (result)
/* 164 Bytes */
stwu r1,-164(r1) /* skip over caller save area */
/* 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, 188(r1)
stw r4, 192(r1)
stw r5, 196(r1)
stw r6, 200(r1)
stw r7, 204(r1)
stw r8, 208(r1)
stw r9, 212(r1)
stw r10, 216(r1)
/* we save fpr 1 to fpr 13 (aligned to 8) */
stfd f1, 56(r1)
stfd f2, 64(r1)
stfd f3, 72(r1)
stfd f4, 80(r1)
stfd f5, 88(r1)
stfd f6, 96(r1)
stfd f7, 104(r1)
stfd f8, 112(r1)
stfd f9, 120(r1)
stfd f10, 128(r1)
stfd f11, 136(r1)
stfd f12, 144(r1)
stfd f13, 152(r1)
/* set up registers for the routine that actually does the work */
/* get the context pointer from the trampoline */
mr r3,r11
/* now load up the pointer to the result storage */
addi r4,r1,160
/* now load up the pointer to the saved gpr registers */
addi r5,r1,188
/* now load up the pointer to the saved fpr registers */
addi r6,r1,56
/* now load up the pointer to the outgoing parameter */
/* stack in the previous frame */
addi r7,r1,220
/* make the call */
bl L(_ffi_closure_helper_DARWIN)
/* now r3 contains the return type */
/* so use it to look up in a table */
/* so we know how to deal with each type */
/* look up the proper starting point in table */
/* by using return type as offset */
addi r5,r1,160 /* get pointer to results area */
addis r4,0,ha16(.L60) /* get address of jump table */
addi r4,r4,lo16(.L60)
slwi r3,r3,2 /* now multiply return type by 4 */
lwzx r3,r4,r3 /* get the contents of that table value */
add r3,r3,r4 /* add contents of table to table address */
mtctr r3
bctr /* jump to it */
.L60:
.long .L44-.L60 /* FFI_TYPE_VOID */
.long .L50-.L60 /* FFI_TYPE_INT */
.long .L47-.L60 /* FFI_TYPE_FLOAT */
.long .L46-.L60 /* FFI_TYPE_DOUBLE */
.long .L46-.L60 /* FFI_TYPE_LONGDOUBLE */
.long .L56-.L60 /* FFI_TYPE_UINT8 */
.long .L55-.L60 /* FFI_TYPE_SINT8 */
.long .L58-.L60 /* FFI_TYPE_UINT16 */
.long .L57-.L60 /* FFI_TYPE_SINT16 */
.long .L50-.L60 /* FFI_TYPE_UINT32 */
.long .L50-.L60 /* FFI_TYPE_SINT32 */
.long .L48-.L60 /* FFI_TYPE_UINT64 */
.long .L48-.L60 /* FFI_TYPE_SINT64 */
.long .L44-.L60 /* FFI_TYPE_STRUCT */
.long .L50-.L60 /* FFI_TYPE_POINTER */
/* case double */
.L46:
lfd f1,0(r5)
b .L44
/* case float */
.L47:
lfs f1,0(r5)
b .L44
/* case long long */
.L48:
lwz r3,0(r5)
lwz r4,4(r5)
b .L44
/* case default / int32 / pointer */
.L50:
lwz r3,0(r5)
b .L44
/* case signed int8 */
.L55:
addi r5,r5,3
lbz r3,0(r5)
extsb r3,r3
b .L44
/* case unsigned int8 */
.L56:
addi r5,r5,3
lbz r3,0(r5)
b .L44
/* case signed int16 */
.L57:
addi r5,r5,2
lhz r3,0(r5)
extsh r3,r3
b .L44
/* case unsigned int16 */
.L58:
addi r5,r5,2
lhz r3,0(r5)
/* case void / done */
.L44:
addi r1,r1,164 /* restore stack pointer */
lwz r0,8(r1) /* get return address */
mtlr r0 /* reset link register */
blr
/* END(ffi_closure_ASM) */

329
libffi/src/powerpc/ffi_darwin.c
View file

@ -6,7 +6,7 @@
Darwin ABI support (c) 2001 John Hornkvist
AIX ABI support (c) 2002 Free Software Foundation, Inc.
$Id: ffi_darwin.c,v 1.2 2002/01/17 16:04:21 dje Exp $
$Id: ffi_darwin.c,v 1.3 2002/02/21 19:14:28 dje Exp $
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
@ -31,6 +31,8 @@
#include <ffi_common.h>
#include <stdlib.h>
extern void ffi_closure_ASM(void);
enum {
/* The assembly depends on these exact flags. */
@ -382,3 +384,328 @@ void ffi_call(/*@dependent@*/ ffi_cif *cif,
break;
}
}
static void flush_icache(char *);
static void flush_range(char *, int);
/* The layout of a function descriptor. A C function pointer really */
/* points to one of these. */
typedef struct aix_fd_struct {
void *code_pointer;
void *toc;
} aix_fd;
/* here I'd like to add the stack frame layout we use in darwin_closure.S
* and aix_clsoure.S
*
/* SP previous -> +---------------------------------------+ <--- child frame
| back chain to caller 4 |
+---------------------------------------+ 4
| saved CR 4 |
+---------------------------------------+ 8
| saved LR 4 |
+---------------------------------------+ 12
| reserved for compilers 4 |
+---------------------------------------+ 16
| reserved for binders 4 |
+---------------------------------------+ 20
| saved TOC pointer 4 |
+---------------------------------------+ 24
| always reserved 8*4=32 (revious GPRs)|
| according to the linkage convention |
| from AIX |
+---------------------------------------+ 56
| our FPR area 13*8=104 |
| f1 |
| . |
| f13 |
+---------------------------------------+ 160
| result area 4 |
SP current --> +---------------------------------------+ 164 <- parent frame
| back chain to caller 4 |
+---------------------------------------+ 168
| saved CR 4 |
+---------------------------------------+ 172
| saved LR 4 |
+---------------------------------------+ 176
| reserved for compilers 4 |
+---------------------------------------+ 180
| reserved for binders 4 |
+---------------------------------------+ 184
| saved TOC pointer 4 |
+---------------------------------------+ 188
| always reserved 8*4=32 we store our |
| GPRs here |
| r3 |
| . |
| r10 |
+---------------------------------------+ 220
| PST area, overflow part |
+---------------------------------------+ xxx
| ???? |
+---------------------------------------+ xxx
*/
ffi_status
ffi_prep_closure (ffi_closure* closure,
ffi_cif* cif,
void (*fun)(ffi_cif*, void*, void**, void*),
void *user_data)
{
unsigned int *tramp;
struct ffi_aix_trampoline_struct *tramp_aix;
switch (cif->abi)
{
case FFI_DARWIN:
FFI_ASSERT (cif->abi == FFI_DARWIN);
tramp = (unsigned int *) &closure->tramp[0];
tramp[0] = 0x7c0802a6; /* mflr r0 */
tramp[1] = 0x4800000d; /* bl 10 <trampoline_initial+0x10> */
tramp[4] = 0x7d6802a6; /* mflr r11 */
tramp[5] = 0x818b0000; /* lwz r12,0(r11) /* function address */
tramp[6] = 0x7c0803a6; /* mtlr r0 */
tramp[7] = 0x7d8903a6; /* mtctr r12 */
tramp[8] = 0x816b0004; /* lwz r11,4(r11) /* static chain */
tramp[9] = 0x4e800420; /* bctr */
*(void **) &tramp[2] = (void *)ffi_closure_ASM; /* function */
*(void **) &tramp[3] = (void *)closure; /* context */
closure->cif = cif;
closure->fun = fun;
closure->user_data = user_data;
/* Flush the icache. Only necessary on Darwin */
flush_range(&closure->tramp[0],FFI_TRAMPOLINE_SIZE);
break;
case FFI_AIX:
tramp_aix = (struct ffi_aix_trampoline_struct *) (closure->tramp);
aix_fd *fd = (aix_fd *)(void *)ffi_closure_ASM;
FFI_ASSERT (cif->abi == FFI_AIX);
tramp_aix->code_pointer = fd->code_pointer;
tramp_aix->toc = fd->toc;
tramp_aix->static_chain = closure;
closure->cif = cif;
closure->fun = fun;
closure->user_data = user_data;
default:
FFI_ASSERT(0);
break;
}
return FFI_OK;
}
static void
flush_icache(char *addr)
{
#ifndef _AIX
__asm__ volatile (
"dcbf 0,%0;"
"sync;"
"icbi 0,%0;"
"sync;"
"isync;"
: : "r"(addr) : "memory");
#endif
}
static void
flush_range(char * addr1, int size)
{
#define MIN_LINE_SIZE 32
int i;
for (i = 0; i < size; i += MIN_LINE_SIZE)
flush_icache(addr1+i);
flush_icache(addr1+size-1);
}
int ffi_closure_helper_DARWIN (ffi_closure*, void*, unsigned long*,
unsigned long*, unsigned long*);
/* 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
* parameters to be passed into the stack frame and setting
* up space for a return value, ffi_closure_ASM invokes the
* following helper function to do most of the work
*/
int
ffi_closure_helper_DARWIN (ffi_closure* closure, void * rvalue,
unsigned long * pgr, unsigned long * pfr,
unsigned long * pst)
{
/* rvalue is the pointer to space for return value in closure assembly */
/* pgr is the pointer to where r3-r10 are stored in ffi_closure_ASM */
/* pfr is the pointer to where f1-f13 are stored in ffi_closure_ASM */
/* pst is the pointer to outgoing parameter stack in original caller */
void ** avalue;
ffi_type ** arg_types;
long i, avn;
long nf; /* number of floating registers already used */
long ng; /* number of general registers already used */
ffi_cif * cif;
double temp;
cif = closure->cif;
avalue = alloca(cif->nargs * sizeof(void *));
nf = 0;
ng = 0;
/* Copy the caller's structure return value address so that the closure
returns the data directly to the caller. */
if (cif->rtype->type == FFI_TYPE_STRUCT)
{
rvalue = (void *)pgr;
ng++;
pgr++;
}
i = 0;
avn = cif->nargs;
arg_types = cif->arg_types;
/* Grab the addresses of the arguments from the stack frame. */
while (i < avn)
{
switch (arg_types[i]->type)
{
case FFI_TYPE_SINT8:
case FFI_TYPE_UINT8:
/* there are 8 gpr registers used to pass values */
if (ng < 8) {
avalue[i] = (((char *)pgr)+3);
ng++;
pgr++;
} else {
avalue[i] = (((char *)pst)+3);
pst++;
}
break;
case FFI_TYPE_SINT16:
case FFI_TYPE_UINT16:
/* there are 8 gpr registers used to pass values */
if (ng < 8) {
avalue[i] = (((char *)pgr)+2);
ng++;
pgr++;
} else {
avalue[i] = (((char *)pst)+2);
pst++;
}
break;
case FFI_TYPE_SINT32:
case FFI_TYPE_UINT32:
case FFI_TYPE_POINTER:
case FFI_TYPE_STRUCT:
/* there are 8 gpr registers used to pass values */
if (ng < 8) {
avalue[i] = pgr;
ng++;
pgr++;
} else {
avalue[i] = pst;
pst++;
}
break;
case FFI_TYPE_SINT64:
case FFI_TYPE_UINT64:
/* long long ints are passed in two gpr's if available or in
* the pst, one place is a bit odd, when a long long passes
* the boundary between gpr and pst area we have to increment
* the pst by one.
*/
if (ng < 7) {
avalue[i] = pgr;
ng+=2;
pgr+=2;
} else if (ng == 7) {
avalue[i] = pgr;
ng++;
pgr++;
pst++;
} else {
avalue[i] = pst;
pst+=2;
}
break;
case FFI_TYPE_FLOAT:
/* a float value consumes a GPR
*
* there are 13 64bit floating point registers
*/
if ((ng > 7) && (nf < 13)) {
pst++;
}
if (nf < 13) {
temp = *(double*)pfr;
*(float*)pfr = (float)temp;
avalue[i] = pfr;
nf++;
pfr+=2;
ng++;
pgr++;
} else {
avalue[i] = pst;
nf++;
pst++;
}
break;
case FFI_TYPE_DOUBLE:
/* a double value consumes two GPRs
*
* there are 13 64bit floating point registers
*/
if ((ng == 7) && (nf < 13)) {
pst++; /* if only one gpr is left the double steals it */
} else if ((ng > 7) && (nf < 13)) {
pst+=2; /* a double consumes two GPRs in Darwin/AIX */
}
if (nf < 13) {
avalue[i] = pfr;
nf++;
pfr+=2;
ng+=2;
pgr+=2;
} else {
avalue[i] = pst;
nf++;
pst+=2;
}
break;
default:
FFI_ASSERT(0);
}
i++;
}
(closure->fun) (cif, rvalue, avalue, closure->user_data);
/* Tell ffi_closure_ASM to perform return type promotions. */
return cif->rtype->type;
}