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Add m88k and VAX support. Update some configury bits.

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This commit is contained in:
Anthony Green
2013-10-08 06:27:46 -04:00
parent d3d099b40c
commit d2fcbcdfbe
26 changed files with 3284 additions and 1368 deletions
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400
src/m88k/ffi.c Normal file
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/*
* Copyright (c) 2013 Miodrag Vallat. <miod@openbsd.org>
*
* 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.
*/
/*
* m88k Foreign Function Interface
*
* This file attempts to provide all the FFI entry points which can reliably
* be implemented in C.
*
* Only OpenBSD/m88k is currently supported; other platforms (such as
* Motorola's SysV/m88k) could be supported with the following tweaks:
*
* - non-OpenBSD systems use an `outgoing parameter area' as part of the
* 88BCS calling convention, which is not supported under OpenBSD from
* release 3.6 onwards. Supporting it should be as easy as taking it
* into account when adjusting the stack, in the assembly code.
*
* - the logic deciding whether a function argument gets passed through
* registers, or on the stack, has changed several times in OpenBSD in
* edge cases (especially for structs larger than 32 bytes being passed
* by value). The code below attemps to match the logic used by the
* system compiler of OpenBSD 5.3, i.e. gcc 3.3.6 with many m88k backend
* fixes.
*/
#include <ffi.h>
#include <ffi_common.h>
#include <stdlib.h>
#include <unistd.h>
void ffi_call_OBSD (unsigned int, extended_cif *, unsigned int, void *,
void (*fn) ());
void *ffi_prep_args (void *, extended_cif *);
void ffi_closure_OBSD (ffi_closure *);
void ffi_closure_struct_OBSD (ffi_closure *);
unsigned int ffi_closure_OBSD_inner (ffi_closure *, void *, unsigned int *,
char *);
void ffi_cacheflush_OBSD (unsigned int, unsigned int);
#define CIF_FLAGS_INT (1 << 0)
#define CIF_FLAGS_DINT (1 << 1)
/*
* Foreign Function Interface API
*/
/* ffi_prep_args is called by the assembly routine once stack space has
been allocated for the function's arguments. */
void *
ffi_prep_args (void *stack, extended_cif *ecif)
{
unsigned int i;
void **p_argv;
char *argp, *stackp;
unsigned int *regp;
unsigned int regused;
ffi_type **p_arg;
void *struct_value_ptr;
regp = (unsigned int *)stack;
stackp = (char *)(regp + 8);
regused = 0;
if (ecif->cif->rtype->type == FFI_TYPE_STRUCT
&& !ecif->cif->flags)
struct_value_ptr = ecif->rvalue;
else
struct_value_ptr = NULL;
p_argv = ecif->avalue;
for (i = ecif->cif->nargs, p_arg = ecif->cif->arg_types; i != 0; i--, p_arg++)
{
size_t z;
unsigned short t, a;
z = (*p_arg)->size;
t = (*p_arg)->type;
a = (*p_arg)->alignment;
/*
* Figure out whether the argument can be passed through registers
* or on the stack.
* The rule is that registers can only receive simple types not larger
* than 64 bits, or structs the exact size of a register and aligned to
* the size of a register.
*/
if (t == FFI_TYPE_STRUCT)
{
if (z == sizeof (int) && a == sizeof (int) && regused < 8)
argp = (char *)regp;
else
argp = stackp;
}
else
{
if (z > sizeof (int) && regused < 8 - 1)
{
/* align to an even register pair */
if (regused & 1)
{
regp++;
regused++;
}
}
if (regused < 8)
argp = (char *)regp;
else
argp = stackp;
}
/* Enforce proper stack alignment of 64-bit types */
if (argp == stackp && a > sizeof (int))
{
stackp = (char *) ALIGN(stackp, a);
argp = stackp;
}
switch (t)
{
case FFI_TYPE_SINT8:
*(signed int *) argp = (signed int) *(SINT8 *) *p_argv;
break;
case FFI_TYPE_UINT8:
*(unsigned int *) argp = (unsigned int) *(UINT8 *) *p_argv;
break;
case FFI_TYPE_SINT16:
*(signed int *) argp = (signed int) *(SINT16 *) *p_argv;
break;
case FFI_TYPE_UINT16:
*(unsigned int *) argp = (unsigned int) *(UINT16 *) *p_argv;
break;
case FFI_TYPE_INT:
case FFI_TYPE_FLOAT:
case FFI_TYPE_UINT32:
case FFI_TYPE_SINT32:
case FFI_TYPE_POINTER:
*(unsigned int *) argp = *(unsigned int *) *p_argv;
break;
case FFI_TYPE_DOUBLE:
case FFI_TYPE_UINT64:
case FFI_TYPE_SINT64:
case FFI_TYPE_STRUCT:
memcpy (argp, *p_argv, z);
break;
default:
FFI_ASSERT (0);
}
/* Align if necessary. */
if ((sizeof (int) - 1) & z)
z = ALIGN(z, sizeof (int));
p_argv++;
/* Be careful, once all registers are filled, and about to continue
on stack, regp == stackp. Therefore the check for regused as well. */
if (argp == (char *)regp && regused < 8)
{
regp += z / sizeof (int);
regused += z / sizeof (int);
}
else
stackp += z;
}
return struct_value_ptr;
}
/* Perform machine dependent cif processing */
ffi_status
ffi_prep_cif_machdep (ffi_cif *cif)
{
/* Set the return type flag */
switch (cif->rtype->type)
{
case FFI_TYPE_VOID:
cif->flags = 0;
break;
case FFI_TYPE_STRUCT:
if (cif->rtype->size == sizeof (int) &&
cif->rtype->alignment == sizeof (int))
cif->flags = CIF_FLAGS_INT;
else
cif->flags = 0;
break;
case FFI_TYPE_DOUBLE:
case FFI_TYPE_SINT64:
case FFI_TYPE_UINT64:
cif->flags = CIF_FLAGS_DINT;
break;
default:
cif->flags = CIF_FLAGS_INT;
break;
}
return FFI_OK;
}
void
ffi_call (ffi_cif *cif, void (*fn) (), void *rvalue, void **avalue)
{
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
&& (cif->rtype->size != sizeof (int)
|| cif->rtype->alignment != sizeof (int)))
ecif.rvalue = alloca (cif->rtype->size);
else
ecif.rvalue = rvalue;
switch (cif->abi)
{
case FFI_OBSD:
ffi_call_OBSD (cif->bytes, &ecif, cif->flags, ecif.rvalue, fn);
break;
default:
FFI_ASSERT (0);
break;
}
}
/*
* Closure API
*/
static void
ffi_prep_closure_args_OBSD (ffi_cif *cif, void **avalue, unsigned int *regp,
char *stackp)
{
unsigned int i;
void **p_argv;
char *argp;
unsigned int regused;
ffi_type **p_arg;
regused = 0;
p_argv = avalue;
for (i = cif->nargs, p_arg = cif->arg_types; i != 0; i--, p_arg++)
{
size_t z;
unsigned short t, a;
z = (*p_arg)->size;
t = (*p_arg)->type;
a = (*p_arg)->alignment;
/*
* Figure out whether the argument has been passed through registers
* or on the stack.
* The rule is that registers can only receive simple types not larger
* than 64 bits, or structs the exact size of a register and aligned to
* the size of a register.
*/
if (t == FFI_TYPE_STRUCT)
{
if (z == sizeof (int) && a == sizeof (int) && regused < 8)
argp = (char *)regp;
else
argp = stackp;
}
else
{
if (z > sizeof (int) && regused < 8 - 1)
{
/* align to an even register pair */
if (regused & 1)
{
regp++;
regused++;
}
}
if (regused < 8)
argp = (char *)regp;
else
argp = stackp;
}
/* Enforce proper stack alignment of 64-bit types */
if (argp == stackp && a > sizeof (int))
{
stackp = (char *) ALIGN(stackp, a);
argp = stackp;
}
if (z < sizeof (int) && t != FFI_TYPE_STRUCT)
*p_argv = (void *) (argp + sizeof (int) - z);
else
*p_argv = (void *) argp;
/* Align if necessary */
if ((sizeof (int) - 1) & z)
z = ALIGN(z, sizeof (int));
p_argv++;
/* Be careful, once all registers are exhausted, and about to fetch from
stack, regp == stackp. Therefore the check for regused as well. */
if (argp == (char *)regp && regused < 8)
{
regp += z / sizeof (int);
regused += z / sizeof (int);
}
else
stackp += z;
}
}
unsigned int
ffi_closure_OBSD_inner (ffi_closure *closure, void *resp, unsigned int *regp,
char *stackp)
{
ffi_cif *cif;
void **arg_area;
cif = closure->cif;
arg_area = (void**) alloca (cif->nargs * sizeof (void *));
ffi_prep_closure_args_OBSD(cif, arg_area, regp, stackp);
(closure->fun) (cif, resp, 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)
{
unsigned int *tramp = (unsigned int *) codeloc;
void *fn;
FFI_ASSERT (cif->abi == FFI_OBSD);
if (cif->rtype->type == FFI_TYPE_STRUCT && !cif->flags)
fn = &ffi_closure_struct_OBSD;
else
fn = &ffi_closure_OBSD;
/* or.u %r10, %r0, %hi16(fn) */
tramp[0] = 0x5d400000 | (((unsigned int)fn) >> 16);
/* or.u %r13, %r0, %hi16(closure) */
tramp[1] = 0x5da00000 | ((unsigned int)closure >> 16);
/* or %r10, %r10, %lo16(fn) */
tramp[2] = 0x594a0000 | (((unsigned int)fn) & 0xffff);
/* jmp.n %r10 */
tramp[3] = 0xf400c40a;
/* or %r13, %r13, %lo16(closure) */
tramp[4] = 0x59ad0000 | ((unsigned int)closure & 0xffff);
ffi_cacheflush_OBSD((unsigned int)codeloc, FFI_TRAMPOLINE_SIZE);
closure->cif = cif;
closure->user_data = user_data;
closure->fun = fun;
return FFI_OK;
}

49
src/m88k/ffitarget.h Normal file
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/*
* Copyright (c) 2013 Miodrag Vallat. <miod@openbsd.org>
*
* 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.
*/
/*
* m88k Foreign Function Interface
*/
#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_OBSD,
FFI_DEFAULT_ABI = FFI_OBSD,
FFI_LAST_ABI = FFI_DEFAULT_ABI + 1
} ffi_abi;
#endif
/* ---- Definitions for closures ----------------------------------------- */
#define FFI_CLOSURES 1
#define FFI_TRAMPOLINE_SIZE 0x14
#define FFI_NATIVE_RAW_API 0
#endif

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src/m88k/obsd.S Normal file
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/*
* Copyright (c) 2013 Miodrag Vallat. <miod@openbsd.org>
*
* 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.
*/
/*
* m88k Foreign Function Interface
*/
#define LIBFFI_ASM
#include <fficonfig.h>
#include <ffi.h>
.text
/*
* ffi_cacheflush_OBSD(unsigned int addr, %r2
* unsigned int size); %r3
*/
.align 4
.globl ffi_cacheflush_OBSD
.type ffi_cacheflush_OBSD,@function
ffi_cacheflush_OBSD:
tb0 0, %r0, 451
or %r0, %r0, %r0
jmp %r1
.size ffi_cacheflush_OBSD, . - ffi_cacheflush_OBSD
/*
* ffi_call_OBSD(unsigned bytes, %r2
* extended_cif *ecif, %r3
* unsigned flags, %r4
* void *rvalue, %r5
* void (*fn)()); %r6
*/
.align 4
.globl ffi_call_OBSD
.type ffi_call_OBSD,@function
ffi_call_OBSD:
subu %r31, %r31, 32
st %r30, %r31, 4
st %r1, %r31, 0
addu %r30, %r31, 32
| Save the few arguments we'll need after ffi_prep_args()
st.d %r4, %r31, 8
st %r6, %r31, 16
| Allocate room for the image of r2-r9, and the stack space for
| the args (rounded to a 16-byte boundary)
addu %r2, %r2, (8 * 4) + 15
clr %r2, %r2, 4<0>
subu %r31, %r31, %r2
| Fill register and stack image
or %r2, %r31, %r0
#ifdef PIC
bsr ffi_prep_args#plt
#else
bsr ffi_prep_args
#endif
| Save pointer to return struct address, if any
or %r12, %r2, %r0
| Get function pointer
subu %r4, %r30, 32
ld %r1, %r4, 16
| Fetch the register arguments
ld.d %r2, %r31, (0 * 4)
ld.d %r4, %r31, (2 * 4)
ld.d %r6, %r31, (4 * 4)
ld.d %r8, %r31, (6 * 4)
addu %r31, %r31, (8 * 4)
| Invoke the function
jsr %r1
| Restore stack now that we don't need the args anymore
subu %r31, %r30, 32
| Figure out what to return as the function's return value
ld %r5, %r31, 12 | rvalue
ld %r4, %r31, 8 | flags
bcnd eq0, %r5, 9f
bb0 0, %r4, 1f | CIF_FLAGS_INT
st %r2, %r5, 0
br 9f
1:
bb0 1, %r4, 1f | CIF_FLAGS_DINT
st.d %r2, %r5, 0
br 9f
1:
9:
ld %r1, %r31, 0
ld %r30, %r31, 4
jmp.n %r1
addu %r31, %r31, 32
.size ffi_call_OBSD, . - ffi_call_OBSD
/*
* ffi_closure_OBSD(ffi_closure *closure); %r13
*/
.align 4
.globl ffi_closure_OBSD
.type ffi_closure_OBSD, @function
ffi_closure_OBSD:
subu %r31, %r31, 16
st %r30, %r31, 4
st %r1, %r31, 0
addu %r30, %r31, 16
| Make room on the stack for saved register arguments and return
| value
subu %r31, %r31, (8 * 4) + (2 * 4)
st.d %r2, %r31, (0 * 4)
st.d %r4, %r31, (2 * 4)
st.d %r6, %r31, (4 * 4)
st.d %r8, %r31, (6 * 4)
| Invoke the closure function
or %r5, %r30, 0 | calling stack
addu %r4, %r31, 0 | saved registers
addu %r3, %r31, (8 * 4) | return value
or %r2, %r13, %r0 | closure
#ifdef PIC
bsr ffi_closure_OBSD_inner#plt
#else
bsr ffi_closure_OBSD_inner
#endif
| Figure out what to return as the function's return value
bb0 0, %r2, 1f | CIF_FLAGS_INT
ld %r2, %r31, (8 * 4)
br 9f
1:
bb0 1, %r2, 1f | CIF_FLAGS_DINT
ld.d %r2, %r31, (8 * 4)
br 9f
1:
9:
subu %r31, %r30, 16
ld %r1, %r31, 0
ld %r30, %r31, 4
jmp.n %r1
addu %r31, %r31, 16
.size ffi_closure_OBSD,.-ffi_closure_OBSD
/*
* ffi_closure_struct_OBSD(ffi_closure *closure); %r13
*/
.align 4
.globl ffi_closure_struct_OBSD
.type ffi_closure_struct_OBSD, @function
ffi_closure_struct_OBSD:
subu %r31, %r31, 16
st %r30, %r31, 4
st %r1, %r31, 0
addu %r30, %r31, 16
| Make room on the stack for saved register arguments
subu %r31, %r31, (8 * 4)
st.d %r2, %r31, (0 * 4)
st.d %r4, %r31, (2 * 4)
st.d %r6, %r31, (4 * 4)
st.d %r8, %r31, (6 * 4)
| Invoke the closure function
or %r5, %r30, 0 | calling stack
addu %r4, %r31, 0 | saved registers
or %r3, %r12, 0 | return value
or %r2, %r13, %r0 | closure
#ifdef PIC
bsr ffi_closure_OBSD_inner#plt
#else
bsr ffi_closure_OBSD_inner
#endif
subu %r31, %r30, 16
ld %r1, %r31, 0
ld %r30, %r31, 4
jmp.n %r1
addu %r31, %r31, 16
.size ffi_closure_struct_OBSD,.-ffi_closure_struct_OBSD

195
src/vax/elfbsd.S Normal file
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/*
* Copyright (c) 2013 Miodrag Vallat. <miod@openbsd.org>
*
* 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.
*/
/*
* vax Foreign Function Interface
*/
#define LIBFFI_ASM
#include <fficonfig.h>
#include <ffi.h>
.text
/*
* void * %r0
* ffi_call_elfbsd(extended_cif *ecif, 4(%ap)
* unsigned bytes, 8(%ap)
* unsigned flags, 12(%ap)
* void *rvalue, 16(%ap)
* void (*fn)()); 20(%ap)
*/
.globl ffi_call_elfbsd
.type ffi_call_elfbsd,@function
.align 2
ffi_call_elfbsd:
.word 0x00c # save R2 and R3
# Allocate stack space for the args
subl2 8(%ap), %sp
# Call ffi_prep_args
pushl %sp
pushl 4(%ap)
calls $2, ffi_prep_args
# Get function pointer
movl 20(%ap), %r1
# Build a CALLS frame
ashl $-2, 8(%ap), %r0
pushl %r0 # argument stack usage
movl %sp, %r0 # future %ap
# saved registers
bbc $11, 0(%r1), 1f
pushl %r11
1: bbc $10, 0(%r1), 1f
pushl %r10
1: bbc $9, 0(%r1), 1f
pushl %r9
1: bbc $8, 0(%r1), 1f
pushl %r8
1: bbc $7, 0(%r1), 1f
pushl %r7
1: bbc $6, 0(%r1), 1f
pushl %r6
1: bbc $5, 0(%r1), 1f
pushl %r5
1: bbc $4, 0(%r1), 1f
pushl %r4
1: bbc $3, 0(%r1), 1f
pushl %r3
1: bbc $2, 0(%r1), 1f
pushl %r2
1:
pushal 9f
pushl %fp
pushl %ap
movl 16(%ap), %r3 # struct return address, if needed
movl %r0, %ap
movzwl 4(%fp), %r0 # previous PSW, without the saved registers mask
bisl2 $0x20000000, %r0 # calls frame
movzwl 0(%r1), %r2
bicw2 $0xf003, %r2 # only keep R11-R2
ashl $16, %r2, %r2
bisl2 %r2, %r0 # saved register mask of the called function
pushl %r0
pushl $0
movl %sp, %fp
# Invoke the function
pushal 2(%r1) # skip procedure entry mask
movl %r3, %r1
bicpsw $0x000f
rsb
9:
# Copy return value if necessary
tstl 16(%ap)
jeql 9f
movl 16(%ap), %r2
bbc $0, 12(%ap), 1f # CIF_FLAGS_CHAR
movb %r0, 0(%r2)
brb 9f
1:
bbc $1, 12(%ap), 1f # CIF_FLAGS_SHORT
movw %r0, 0(%r2)
brb 9f
1:
bbc $2, 12(%ap), 1f # CIF_FLAGS_INT
movl %r0, 0(%r2)
brb 9f
1:
bbc $3, 12(%ap), 1f # CIF_FLAGS_DINT
movq %r0, 0(%r2)
brb 9f
1:
movl %r1, %r0 # might have been a struct
#brb 9f
9:
ret
/*
* ffi_closure_elfbsd(void);
* invoked with %r0: ffi_closure *closure
*/
.globl ffi_closure_elfbsd
.type ffi_closure_elfbsd, @function
.align 2
ffi_closure_elfbsd:
.word 0
# Allocate room on stack for return value
subl2 $8, %sp
# Invoke the closure function
pushal 4(%ap) # calling stack
pushal 4(%sp) # return value
pushl %r0 # closure
calls $3, ffi_closure_elfbsd_inner
# Copy return value if necessary
bitb $1, %r0 # CIF_FLAGS_CHAR
beql 1f
movb 0(%sp), %r0
brb 9f
1:
bitb $2, %r0 # CIF_FLAGS_SHORT
beql 1f
movw 0(%sp), %r0
brb 9f
1:
bitb $4, %r0 # CIF_FLAGS_INT
beql 1f
movl 0(%sp), %r0
brb 9f
1:
bitb $8, %r0 # CIF_FLAGS_DINT
beql 1f
movq 0(%sp), %r0
#brb 9f
1:
9:
ret
/*
* ffi_closure_struct_elfbsd(void);
* invoked with %r0: ffi_closure *closure
* %r1: struct return address
*/
.globl ffi_closure_struct_elfbsd
.type ffi_closure_struct_elfbsd, @function
.align 2
ffi_closure_struct_elfbsd:
.word 0
# Invoke the closure function
pushal 4(%ap) # calling stack
pushl %r1 # return value
pushl %r0 # closure
calls $3, ffi_closure_elfbsd_inner
ret

276
src/vax/ffi.c Normal file
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/*
* Copyright (c) 2013 Miodrag Vallat. <miod@openbsd.org>
*
* 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.
*/
/*
* vax Foreign Function Interface
*
* This file attempts to provide all the FFI entry points which can reliably
* be implemented in C.
*/
#include <ffi.h>
#include <ffi_common.h>
#include <stdlib.h>
#include <unistd.h>
#define CIF_FLAGS_CHAR 1 /* for struct only */
#define CIF_FLAGS_SHORT 2 /* for struct only */
#define CIF_FLAGS_INT 4
#define CIF_FLAGS_DINT 8
/*
* Foreign Function Interface API
*/
void ffi_call_elfbsd (extended_cif *, unsigned, unsigned, void *,
void (*) ());
void *ffi_prep_args (extended_cif *ecif, void *stack);
void *
ffi_prep_args (extended_cif *ecif, void *stack)
{
unsigned int i;
void **p_argv;
char *argp;
ffi_type **p_arg;
void *struct_value_ptr;
argp = stack;
if (ecif->cif->rtype->type == FFI_TYPE_STRUCT
&& !ecif->cif->flags)
struct_value_ptr = ecif->rvalue;
else
struct_value_ptr = NULL;
p_argv = ecif->avalue;
for (i = ecif->cif->nargs, p_arg = ecif->cif->arg_types;
i != 0;
i--, p_arg++)
{
size_t z;
z = (*p_arg)->size;
if (z < sizeof (int))
{
switch ((*p_arg)->type)
{
case FFI_TYPE_SINT8:
*(signed int *) argp = (signed int) *(SINT8 *) *p_argv;
break;
case FFI_TYPE_UINT8:
*(unsigned int *) argp = (unsigned int) *(UINT8 *) *p_argv;
break;
case FFI_TYPE_SINT16:
*(signed int *) argp = (signed int) *(SINT16 *) *p_argv;
break;
case FFI_TYPE_UINT16:
*(unsigned int *) argp = (unsigned int) *(UINT16 *) *p_argv;
break;
case FFI_TYPE_STRUCT:
memcpy (argp, *p_argv, z);
break;
default:
FFI_ASSERT (0);
}
z = sizeof (int);
}
else
{
memcpy (argp, *p_argv, z);
/* Align if necessary. */
if ((sizeof(int) - 1) & z)
z = ALIGN(z, sizeof(int));
}
p_argv++;
argp += z;
}
return struct_value_ptr;
}
ffi_status
ffi_prep_cif_machdep (ffi_cif *cif)
{
/* Set the return type flag */
switch (cif->rtype->type)
{
case FFI_TYPE_VOID:
cif->flags = 0;
break;
case FFI_TYPE_STRUCT:
if (cif->rtype->elements[0]->type == FFI_TYPE_STRUCT &&
cif->rtype->elements[1])
{
cif->flags = 0;
break;
}
if (cif->rtype->size == sizeof (char))
cif->flags = CIF_FLAGS_CHAR;
else if (cif->rtype->size == sizeof (short))
cif->flags = CIF_FLAGS_SHORT;
else if (cif->rtype->size == sizeof (int))
cif->flags = CIF_FLAGS_INT;
else if (cif->rtype->size == 2 * sizeof (int))
cif->flags = CIF_FLAGS_DINT;
else
cif->flags = 0;
break;
default:
if (cif->rtype->size <= sizeof (int))
cif->flags = CIF_FLAGS_INT;
else
cif->flags = CIF_FLAGS_DINT;
break;
}
return FFI_OK;
}
void
ffi_call (ffi_cif *cif, void (*fn) (), void *rvalue, void **avalue)
{
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
&& cif->flags == 0)
ecif.rvalue = alloca (cif->rtype->size);
else
ecif.rvalue = rvalue;
switch (cif->abi)
{
case FFI_ELFBSD:
ffi_call_elfbsd (&ecif, cif->bytes, cif->flags, ecif.rvalue, fn);
break;
default:
FFI_ASSERT (0);
break;
}
}
/*
* Closure API
*/
void ffi_closure_elfbsd (void);
void ffi_closure_struct_elfbsd (void);
unsigned int ffi_closure_elfbsd_inner (ffi_closure *, void *, char *);
static void
ffi_prep_closure_elfbsd (ffi_cif *cif, void **avalue, char *stackp)
{
unsigned int i;
void **p_argv;
ffi_type **p_arg;
p_argv = avalue;
for (i = cif->nargs, p_arg = cif->arg_types; i != 0; i--, p_arg++)
{
size_t z;
z = (*p_arg)->size;
*p_argv = stackp;
/* Align if necessary */
if ((sizeof (int) - 1) & z)
z = ALIGN(z, sizeof (int));
p_argv++;
stackp += z;
}
}
unsigned int
ffi_closure_elfbsd_inner (ffi_closure *closure, void *resp, char *stack)
{
ffi_cif *cif;
void **arg_area;
cif = closure->cif;
arg_area = (void **) alloca (cif->nargs * sizeof (void *));
ffi_prep_closure_elfbsd (cif, arg_area, stack);
(closure->fun) (cif, resp, 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)
{
char *tramp = (char *) codeloc;
void *fn;
FFI_ASSERT (cif->abi == FFI_ELFBSD);
/* entry mask */
*(unsigned short *)(tramp + 0) = 0x0000;
/* movl #closure, r0 */
tramp[2] = 0xd0;
tramp[3] = 0x8f;
*(unsigned int *)(tramp + 4) = (unsigned int) closure;
tramp[8] = 0x50;
if (cif->rtype->type == FFI_TYPE_STRUCT
&& !cif->flags)
fn = &ffi_closure_struct_elfbsd;
else
fn = &ffi_closure_elfbsd;
/* jmpl #fn */
tramp[9] = 0x17;
tramp[10] = 0xef;
*(unsigned int *)(tramp + 11) = (unsigned int)fn + 2 -
(unsigned int)tramp - 9 - 6;
closure->cif = cif;
closure->user_data = user_data;
closure->fun = fun;
return FFI_OK;
}

49
src/vax/ffitarget.h Normal file
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/*
* Copyright (c) 2013 Miodrag Vallat. <miod@openbsd.org>
*
* 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.
*/
/*
* vax Foreign Function Interface
*/
#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_ELFBSD,
FFI_DEFAULT_ABI = FFI_ELFBSD,
FFI_LAST_ABI = FFI_DEFAULT_ABI + 1
} ffi_abi;
#endif
/* ---- Definitions for closures ----------------------------------------- */
#define FFI_CLOSURES 1
#define FFI_TRAMPOLINE_SIZE 15
#define FFI_NATIVE_RAW_API 0
#endif