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Rebase from GCC

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This commit is contained in:
Anthony Green
2009-12-26 07:02:27 -05:00
parent 6a34124175
commit 9458d88f67
58 changed files with 1521 additions and 847 deletions
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dir
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svn+ssh://green@gcc.gnu.org/svn/gcc/trunk/libffi/src/avr32
svn+ssh://green@gcc.gnu.org/svn/gcc
2009-12-26T04:21:07.255800Z
155469
green
138bc75d-0d04-0410-961f-82ee72b054a4
ffitarget.h
file
2009-12-26T03:57:14.102225Z
97c80ed302cb9613e2e501a162651ea7
2009-12-26T04:21:07.255800Z
155469
green
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ffi.c
file
2009-12-26T03:57:14.066978Z
9ee26077d6b37d391bb6275be0437144
2009-12-26T04:21:07.255800Z
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sysv.S
file
2009-12-26T03:57:14.102225Z
808bd4aa64c30850292f3ffe35d19ea5
2009-12-26T04:21:07.255800Z
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/* -----------------------------------------------------------------------
ffi.c - Copyright (c) 2009 Bradley Smith <brad@brad-smith.co.uk>
AVR32 Foreign Function Interface
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 AUTHORS OR COPYRIGHT
HOLDERS 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.
----------------------------------------------------------------------- */
#include <ffi.h>
#include <ffi_common.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <asm/unistd.h>
/* #define DEBUG */
extern void ffi_call_SYSV(void (*)(char *, extended_cif *), extended_cif *,
unsigned int, unsigned int, unsigned int*, unsigned int,
void (*fn)(void));
extern void ffi_closure_SYSV (ffi_closure *);
unsigned int pass_struct_on_stack(ffi_type *type)
{
if(type->type != FFI_TYPE_STRUCT)
return 0;
if(type->alignment < type->size &&
!(type->size == 4 || type->size == 8) &&
!(type->size == 8 && type->alignment >= 4))
return 1;
if(type->size == 3 || type->size == 5 || type->size == 6 ||
type->size == 7)
return 1;
return 0;
}
/* ffi_prep_args is called by the assembly routine once stack space
* has been allocated for the function's arguments
*
* This is annoyingly complex since we need to keep track of used
* registers.
*/
void ffi_prep_args(char *stack, extended_cif *ecif)
{
unsigned int i;
void **p_argv;
ffi_type **p_arg;
char *reg_base = stack;
char *stack_base = stack + 20;
unsigned int stack_offset = 0;
unsigned int reg_mask = 0;
p_argv = ecif->avalue;
/* If cif->flags is struct then we know it's not passed in registers */
if(ecif->cif->flags == FFI_TYPE_STRUCT)
{
*(void**)reg_base = ecif->rvalue;
reg_mask |= 1;
}
for(i = 0, p_arg = ecif->cif->arg_types; i < ecif->cif->nargs;
i++, p_arg++)
{
size_t z = (*p_arg)->size;
int alignment = (*p_arg)->alignment;
int type = (*p_arg)->type;
char *addr = 0;
if(z % 4 != 0)
z += (4 - z % 4);
if(reg_mask != 0x1f)
{
if(pass_struct_on_stack(*p_arg))
{
addr = stack_base + stack_offset;
stack_offset += z;
}
else if(z == sizeof(int))
{
char index = 0;
while((reg_mask >> index) & 1)
index++;
addr = reg_base + (index * 4);
reg_mask |= (1 << index);
}
else if(z == 2 * sizeof(int))
{
if(!((reg_mask >> 1) & 1))
{
addr = reg_base + 4;
reg_mask |= (3 << 1);
}
else if(!((reg_mask >> 3) & 1))
{
addr = reg_base + 12;
reg_mask |= (3 << 3);
}
}
}
if(!addr)
{
addr = stack_base + stack_offset;
stack_offset += z;
}
if(type == FFI_TYPE_STRUCT && (*p_arg)->elements[1] == NULL)
type = (*p_arg)->elements[0]->type;
switch(type)
{
case FFI_TYPE_UINT8:
*(unsigned int *)addr = (unsigned int)*(UINT8 *)(*p_argv);
break;
case FFI_TYPE_SINT8:
*(signed int *)addr = (signed int)*(SINT8 *)(*p_argv);
break;
case FFI_TYPE_UINT16:
*(unsigned int *)addr = (unsigned int)*(UINT16 *)(*p_argv);
break;
case FFI_TYPE_SINT16:
*(signed int *)addr = (signed int)*(SINT16 *)(*p_argv);
break;
default:
memcpy(addr, *p_argv, z);
}
p_argv++;
}
#ifdef DEBUG
/* Debugging */
for(i = 0; i < 5; i++)
{
if((reg_mask & (1 << i)) == 0)
printf("r%d: (unused)\n", 12 - i);
else
printf("r%d: 0x%08x\n", 12 - i, ((unsigned int*)reg_base)[i]);
}
for(i = 0; i < stack_offset / 4; i++)
{
printf("sp+%d: 0x%08x\n", i*4, ((unsigned int*)stack_base)[i]);
}
#endif
}
/* Perform machine dependent cif processing */
ffi_status ffi_prep_cif_machdep(ffi_cif *cif)
{
/* Round the stack up to a multiple of 8 bytes. This isn't needed
* everywhere, but it is on some platforms, and it doesn't harm
* anything when it isn't needed. */
cif->bytes = (cif->bytes + 7) & ~7;
/* Flag to indicate that he return value is in fact a struct */
cif->rstruct_flag = 0;
/* Set the return type flag */
switch(cif->rtype->type)
{
case FFI_TYPE_SINT8:
case FFI_TYPE_UINT8:
cif->flags = (unsigned)FFI_TYPE_UINT8;
break;
case FFI_TYPE_SINT16:
case FFI_TYPE_UINT16:
cif->flags = (unsigned)FFI_TYPE_UINT16;
break;
case FFI_TYPE_FLOAT:
case FFI_TYPE_SINT32:
case FFI_TYPE_UINT32:
case FFI_TYPE_POINTER:
cif->flags = (unsigned)FFI_TYPE_UINT32;
break;
case FFI_TYPE_DOUBLE:
case FFI_TYPE_SINT64:
case FFI_TYPE_UINT64:
cif->flags = (unsigned)FFI_TYPE_UINT64;
break;
case FFI_TYPE_STRUCT:
cif->rstruct_flag = 1;
if(!pass_struct_on_stack(cif->rtype))
{
if(cif->rtype->size <= 1)
cif->flags = (unsigned)FFI_TYPE_UINT8;
else if(cif->rtype->size <= 2)
cif->flags = (unsigned)FFI_TYPE_UINT16;
else if(cif->rtype->size <= 4)
cif->flags = (unsigned)FFI_TYPE_UINT32;
else if(cif->rtype->size <= 8)
cif->flags = (unsigned)FFI_TYPE_UINT64;
else
cif->flags = (unsigned)cif->rtype->type;
}
else
cif->flags = (unsigned)cif->rtype->type;
break;
default:
cif->flags = (unsigned)cif->rtype->type;
break;
}
return FFI_OK;
}
void ffi_call(ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue)
{
extended_cif ecif;
unsigned int size = 0, i = 0;
ffi_type **p_arg;
ecif.cif = cif;
ecif.avalue = avalue;
for(i = 0, p_arg = cif->arg_types; i < cif->nargs; i++, p_arg++)
size += (*p_arg)->size + (4 - (*p_arg)->size % 4);
/* If the return value is a struct and we don't have a return value
* address then we need to make one */
/* If cif->flags is struct then it's not suitable for registers */
if((rvalue == NULL) && (cif->flags == FFI_TYPE_STRUCT))
ecif.rvalue = alloca(cif->rtype->size);
else
ecif.rvalue = rvalue;
switch(cif->abi)
{
case FFI_SYSV:
ffi_call_SYSV(ffi_prep_args, &ecif, size, cif->flags,
ecif.rvalue, cif->rstruct_flag, fn);
break;
default:
FFI_ASSERT(0);
break;
}
}
static void ffi_prep_incoming_args_SYSV(char *stack, void **rvalue,
void **avalue, ffi_cif *cif)
{
register unsigned int i, reg_mask = 0;
register void **p_argv;
register ffi_type **p_arg;
register char *reg_base = stack;
register char *stack_base = stack + 20;
register unsigned int stack_offset = 0;
#ifdef DEBUG
/* Debugging */
for(i = 0; i < cif->nargs + 7; i++)
{
printf("sp+%d: 0x%08x\n", i*4, ((unsigned int*)stack)[i]);
}
#endif
/* If cif->flags is struct then we know it's not passed in registers */
if(cif->flags == FFI_TYPE_STRUCT)
{
*rvalue = *(void **)reg_base;
reg_mask |= 1;
}
p_argv = avalue;
for(i = 0, p_arg = cif->arg_types; i < cif->nargs; i++, p_arg++)
{
size_t z = (*p_arg)->size;
int alignment = (*p_arg)->alignment;
*p_argv = 0;
if(z % 4 != 0)
z += (4 - z % 4);
if(reg_mask != 0x1f)
{
if(pass_struct_on_stack(*p_arg))
{
*p_argv = (void*)stack_base + stack_offset;
stack_offset += z;
}
else if(z <= sizeof(int))
{
char index = 0;
while((reg_mask >> index) & 1)
index++;
*p_argv = (void*)reg_base + (index * 4);
reg_mask |= (1 << index);
}
else if(z == 2 * sizeof(int))
{
if(!((reg_mask >> 1) & 1))
{
*p_argv = (void*)reg_base + 4;
reg_mask |= (3 << 1);
}
else if(!((reg_mask >> 3) & 1))
{
*p_argv = (void*)reg_base + 12;
reg_mask |= (3 << 3);
}
}
}
if(!*p_argv)
{
*p_argv = (void*)stack_base + stack_offset;
stack_offset += z;
}
if((*p_arg)->type != FFI_TYPE_STRUCT ||
(*p_arg)->elements[1] == NULL)
{
if(alignment == 1)
**(unsigned int**)p_argv <<= 24;
else if(alignment == 2)
**(unsigned int**)p_argv <<= 16;
}
p_argv++;
}
#ifdef DEBUG
/* Debugging */
for(i = 0; i < cif->nargs; i++)
{
printf("sp+%d: 0x%08x\n", i*4, *(((unsigned int**)avalue)[i]));
}
#endif
}
/* This function is jumped to by the trampoline */
unsigned int ffi_closure_SYSV_inner(ffi_closure *closure, void **respp,
void *args)
{
ffi_cif *cif;
void **arg_area;
unsigned int i, size = 0;
ffi_type **p_arg;
cif = closure->cif;
for(i = 0, p_arg = cif->arg_types; i < cif->nargs; i++, p_arg++)
size += (*p_arg)->size + (4 - (*p_arg)->size % 4);
arg_area = (void **)alloca(size);
/* this call will initialize ARG_AREA, such that each element in that
* array points to the corresponding value on the stack; and if the
* function returns a structure, it will re-set RESP to point to the
* structure return address. */
ffi_prep_incoming_args_SYSV(args, respp, arg_area, cif);
(closure->fun)(cif, *respp, arg_area, closure->user_data);
return cif->flags;
}
ffi_status ffi_prep_closure_loc(ffi_closure* closure, ffi_cif* cif,
void (*fun)(ffi_cif*, void*, void**, void*), void *user_data,
void *codeloc)
{
FFI_ASSERT(cif->abi == FFI_SYSV);
unsigned char *__tramp = (unsigned char*)(&closure->tramp[0]);
unsigned int __fun = (unsigned int)(&ffi_closure_SYSV);
unsigned int __ctx = (unsigned int)(codeloc);
unsigned int __rstruct_flag = (unsigned int)(cif->rstruct_flag);
unsigned int __inner = (unsigned int)(&ffi_closure_SYSV_inner);
*(unsigned int*) &__tramp[0] = 0xebcd1f00; /* pushm r8-r12 */
*(unsigned int*) &__tramp[4] = 0xfefc0010; /* ld.w r12, pc[16] */
*(unsigned int*) &__tramp[8] = 0xfefb0010; /* ld.w r11, pc[16] */
*(unsigned int*) &__tramp[12] = 0xfefa0010; /* ld.w r10, pc[16] */
*(unsigned int*) &__tramp[16] = 0xfeff0010; /* ld.w pc, pc[16] */
*(unsigned int*) &__tramp[20] = __ctx;
*(unsigned int*) &__tramp[24] = __rstruct_flag;
*(unsigned int*) &__tramp[28] = __inner;
*(unsigned int*) &__tramp[32] = __fun;
syscall(__NR_cacheflush, 0, (&__tramp[0]), 36);
closure->cif = cif;
closure->user_data = user_data;
closure->fun = fun;
return FFI_OK;
}

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/* -----------------------------------------------------------------*-C-*-
ffitarget.h - Copyright (c) 2009 Bradley Smith <brad@brad-smith.co.uk>
Target configuration macros for AVR32.
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 AUTHORS OR COPYRIGHT
HOLDERS 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.
----------------------------------------------------------------------- */
#ifndef LIBFFI_TARGET_H
#define LIBFFI_TARGET_H
#ifndef LIBFFI_ASM
typedef unsigned long ffi_arg;
typedef signed long ffi_sarg;
typedef enum ffi_abi {
FFI_FIRST_ABI = 0,
FFI_SYSV,
FFI_DEFAULT_ABI = FFI_SYSV,
FFI_LAST_ABI = FFI_DEFAULT_ABI + 1
} ffi_abi;
#endif
#define FFI_EXTRA_CIF_FIELDS unsigned int rstruct_flag
/* Definitions for closures */
#define FFI_CLOSURES 1
#define FFI_TRAMPOLINE_SIZE 36
#define FFI_NATIVE_RAW_API 0
#endif

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/* -----------------------------------------------------------------------
sysv.S - Copyright (c) 2009 Bradley Smith <brad@brad-smith.co.uk>
AVR32 Foreign Function Interface
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 AUTHORS OR COPYRIGHT HOLDERS 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
#include <fficonfig.h>
#include <ffi.h>
/* r12: ffi_prep_args
* r11: &ecif
* r10: size
* r9: cif->flags
* r8: ecif.rvalue
* sp+0: cif->rstruct_flag
* sp+4: fn */
.text
.align 1
.globl ffi_call_SYSV
.type ffi_call_SYSV, @function
ffi_call_SYSV:
stm --sp, r0,r1,lr
stm --sp, r8-r12
mov r0, sp
/* Make room for all of the new args. */
sub sp, r10
/* Pad to make way for potential skipped registers */
sub sp, 20
/* Call ffi_prep_args(stack, &ecif). */
/* r11 already set */
mov r1, r12
mov r12, sp
icall r1
/* Save new argument size */
mov r1, r12
/* Move first 5 parameters in registers. */
ldm sp++, r8-r12
/* call (fn) (...). */
ld.w r1, r0[36]
icall r1
/* Remove the space we pushed for the args. */
mov sp, r0
/* Load r1 with the rstruct flag. */
ld.w r1, sp[32]
/* Load r9 with the return type code. */
ld.w r9, sp[12]
/* Load r8 with the return value pointer. */
ld.w r8, sp[16]
/* If the return value pointer is NULL, assume no return value. */
cp.w r8, 0
breq .Lend
/* Check if return type is actually a struct */
cp.w r1, 0
breq 1f
/* Return 8bit */
cp.w r9, FFI_TYPE_UINT8
breq .Lstore8
/* Return 16bit */
cp.w r9, FFI_TYPE_UINT16
breq .Lstore16
1:
/* Return 32bit */
cp.w r9, FFI_TYPE_UINT32
breq .Lstore32
cp.w r9, FFI_TYPE_UINT16
breq .Lstore32
cp.w r9, FFI_TYPE_UINT8
breq .Lstore32
/* Return 64bit */
cp.w r9, FFI_TYPE_UINT64
breq .Lstore64
/* Didn't match anything */
bral .Lend
.Lstore64:
st.w r8[0], r11
st.w r8[4], r10
bral .Lend
.Lstore32:
st.w r8[0], r12
bral .Lend
.Lstore16:
st.h r8[0], r12
bral .Lend
.Lstore8:
st.b r8[0], r12
bral .Lend
.Lend:
sub sp, -20
ldm sp++, r0,r1,pc
.size ffi_call_SYSV, . - ffi_call_SYSV
/* r12: __ctx
* r11: __rstruct_flag
* r10: __inner */
.align 1
.globl ffi_closure_SYSV
.type ffi_closure_SYSV, @function
ffi_closure_SYSV:
stm --sp, r0,lr
mov r0, r11
mov r8, r10
sub r10, sp, -8
sub sp, 12
st.w sp[8], sp
sub r11, sp, -8
icall r8
/* Check if return type is actually a struct */
cp.w r0, 0
breq 1f
/* Return 8bit */
cp.w r12, FFI_TYPE_UINT8
breq .Lget8
/* Return 16bit */
cp.w r12, FFI_TYPE_UINT16
breq .Lget16
1:
/* Return 32bit */
cp.w r12, FFI_TYPE_UINT32
breq .Lget32
cp.w r12, FFI_TYPE_UINT16
breq .Lget32
cp.w r12, FFI_TYPE_UINT8
breq .Lget32
/* Return 64bit */
cp.w r12, FFI_TYPE_UINT64
breq .Lget64
/* Didn't match anything */
bral .Lclend
.Lget64:
ld.w r11, sp[0]
ld.w r10, sp[4]
bral .Lclend
.Lget32:
ld.w r12, sp[0]
bral .Lclend
.Lget16:
ld.uh r12, sp[0]
bral .Lclend
.Lget8:
ld.ub r12, sp[0]
bral .Lclend
.Lclend:
sub sp, -12
ldm sp++, r0,lr
sub sp, -20
mov pc, lr
.size ffi_closure_SYSV, . - ffi_closure_SYSV
#if defined __ELF__ && defined __linux__
.section .note.GNU-stack,"",@progbits
#endif