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Brian Fiete 2019-08-23 11:56:54 -07:00
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321
BeefySysLib/third_party/libffi/src/microblaze/ffi.c vendored Normal file
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/* -----------------------------------------------------------------------
ffi.c - Copyright (c) 2012, 2013 Xilinx, Inc
MicroBlaze 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>
extern void ffi_call_SYSV(void (*)(void*, extended_cif*), extended_cif*,
unsigned int, unsigned int, unsigned int*, void (*fn)(void),
unsigned int, unsigned int);
extern void ffi_closure_SYSV(void);
#define WORD_SIZE sizeof(unsigned int)
#define ARGS_REGISTER_SIZE (WORD_SIZE * 6)
#define WORD_ALIGN(x) ALIGN(x, WORD_SIZE)
/* 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;
ffi_type** p_arg;
void** p_argv;
void* stack_args_p = stack;
p_argv = ecif->avalue;
if (ecif == NULL || ecif->cif == NULL) {
return; /* no description to prepare */
}
if ((ecif->cif->rtype != NULL) &&
(ecif->cif->rtype->type == FFI_TYPE_STRUCT))
{
/* if return type is a struct which is referenced on the stack/reg5,
* by a pointer. Stored the return value pointer in r5.
*/
char* addr = stack_args_p;
memcpy(addr, &(ecif->rvalue), WORD_SIZE);
stack_args_p += WORD_SIZE;
}
if (ecif->avalue == NULL) {
return; /* no arguments to prepare */
}
for (i = 0, p_arg = ecif->cif->arg_types; i < ecif->cif->nargs;
i++, p_arg++)
{
size_t size = (*p_arg)->size;
int type = (*p_arg)->type;
void* value = p_argv[i];
char* addr = stack_args_p;
int aligned_size = WORD_ALIGN(size);
/* force word alignment on the stack */
stack_args_p += aligned_size;
switch (type)
{
case FFI_TYPE_UINT8:
*(unsigned int *)addr = (unsigned int)*(UINT8*)(value);
break;
case FFI_TYPE_SINT8:
*(signed int *)addr = (signed int)*(SINT8*)(value);
break;
case FFI_TYPE_UINT16:
*(unsigned int *)addr = (unsigned int)*(UINT16*)(value);
break;
case FFI_TYPE_SINT16:
*(signed int *)addr = (signed int)*(SINT16*)(value);
break;
case FFI_TYPE_STRUCT:
#if __BIG_ENDIAN__
/*
* MicroBlaze toolchain appears to emit:
* bsrli r5, r5, 8 (caller)
* ...
* <branch to callee>
* ...
* bslli r5, r5, 8 (callee)
*
* For structs like "struct a { uint8_t a[3]; };", when passed
* by value.
*
* Structs like "struct b { uint16_t a; };" are also expected
* to be packed strangely in registers.
*
* This appears to be because the microblaze toolchain expects
* "struct b == uint16_t", which is only any issue for big
* endian.
*
* The following is a work around for big-endian only, for the
* above mentioned case, it will re-align the contents of a
* <= 3-byte struct value.
*/
if (size < WORD_SIZE)
{
memcpy (addr + (WORD_SIZE - size), value, size);
break;
}
#endif
case FFI_TYPE_SINT32:
case FFI_TYPE_UINT32:
case FFI_TYPE_FLOAT:
case FFI_TYPE_SINT64:
case FFI_TYPE_UINT64:
case FFI_TYPE_DOUBLE:
default:
memcpy(addr, value, aligned_size);
}
}
}
ffi_status ffi_prep_cif_machdep(ffi_cif* cif)
{
/* check ABI */
switch (cif->abi)
{
case FFI_SYSV:
break;
default:
return FFI_BAD_ABI;
}
return FFI_OK;
}
void ffi_call(ffi_cif* cif, void (*fn)(void), 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)) {
ecif.rvalue = alloca(cif->rtype->size);
} else {
ecif.rvalue = rvalue;
}
switch (cif->abi)
{
case FFI_SYSV:
ffi_call_SYSV(ffi_prep_args, &ecif, cif->bytes, cif->flags,
ecif.rvalue, fn, cif->rtype->type, cif->rtype->size);
break;
default:
FFI_ASSERT(0);
break;
}
}
void ffi_closure_call_SYSV(void* register_args, void* stack_args,
ffi_closure* closure, void* rvalue,
unsigned int* rtype, unsigned int* rsize)
{
/* prepare arguments for closure call */
ffi_cif* cif = closure->cif;
ffi_type** arg_types = cif->arg_types;
/* re-allocate data for the args. This needs to be done in order to keep
* multi-word objects (e.g. structs) in contigious memory. Callers are not
* required to store the value of args in the lower 6 words in the stack
* (although they are allocated in the stack).
*/
char* stackclone = alloca(cif->bytes);
void** avalue = alloca(cif->nargs * sizeof(void*));
void* struct_rvalue = NULL;
char* ptr = stackclone;
int i;
/* copy registers into stack clone */
int registers_used = cif->bytes;
if (registers_used > ARGS_REGISTER_SIZE) {
registers_used = ARGS_REGISTER_SIZE;
}
memcpy(stackclone, register_args, registers_used);
/* copy stack allocated args into stack clone */
if (cif->bytes > ARGS_REGISTER_SIZE) {
int stack_used = cif->bytes - ARGS_REGISTER_SIZE;
memcpy(stackclone + ARGS_REGISTER_SIZE, stack_args, stack_used);
}
/* preserve struct type return pointer passing */
if ((cif->rtype != NULL) && (cif->rtype->type == FFI_TYPE_STRUCT)) {
struct_rvalue = *((void**)ptr);
ptr += WORD_SIZE;
}
/* populate arg pointer list */
for (i = 0; i < cif->nargs; i++)
{
switch (arg_types[i]->type)
{
case FFI_TYPE_SINT8:
case FFI_TYPE_UINT8:
#ifdef __BIG_ENDIAN__
avalue[i] = ptr + 3;
#else
avalue[i] = ptr;
#endif
break;
case FFI_TYPE_SINT16:
case FFI_TYPE_UINT16:
#ifdef __BIG_ENDIAN__
avalue[i] = ptr + 2;
#else
avalue[i] = ptr;
#endif
break;
case FFI_TYPE_STRUCT:
#if __BIG_ENDIAN__
/*
* Work around strange ABI behaviour.
* (see info in ffi_prep_args)
*/
if (arg_types[i]->size < WORD_SIZE)
{
memcpy (ptr, ptr + (WORD_SIZE - arg_types[i]->size), arg_types[i]->size);
}
#endif
avalue[i] = (void*)ptr;
break;
case FFI_TYPE_UINT64:
case FFI_TYPE_SINT64:
case FFI_TYPE_DOUBLE:
avalue[i] = ptr;
break;
case FFI_TYPE_SINT32:
case FFI_TYPE_UINT32:
case FFI_TYPE_FLOAT:
default:
/* default 4-byte argument */
avalue[i] = ptr;
break;
}
ptr += WORD_ALIGN(arg_types[i]->size);
}
/* set the return type info passed back to the wrapper */
*rsize = cif->rtype->size;
*rtype = cif->rtype->type;
if (struct_rvalue != NULL) {
closure->fun(cif, struct_rvalue, avalue, closure->user_data);
/* copy struct return pointer value into function return value */
*((void**)rvalue) = struct_rvalue;
} else {
closure->fun(cif, rvalue, avalue, closure->user_data);
}
}
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 long* tramp = (unsigned long*)&(closure->tramp[0]);
unsigned long cls = (unsigned long)codeloc;
unsigned long fn = 0;
unsigned long fn_closure_call_sysv = (unsigned long)ffi_closure_call_SYSV;
closure->cif = cif;
closure->fun = fun;
closure->user_data = user_data;
switch (cif->abi)
{
case FFI_SYSV:
fn = (unsigned long)ffi_closure_SYSV;
/* load r11 (temp) with fn */
/* imm fn(upper) */
tramp[0] = 0xb0000000 | ((fn >> 16) & 0xffff);
/* addik r11, r0, fn(lower) */
tramp[1] = 0x31600000 | (fn & 0xffff);
/* load r12 (temp) with cls */
/* imm cls(upper) */
tramp[2] = 0xb0000000 | ((cls >> 16) & 0xffff);
/* addik r12, r0, cls(lower) */
tramp[3] = 0x31800000 | (cls & 0xffff);
/* load r3 (temp) with ffi_closure_call_SYSV */
/* imm fn_closure_call_sysv(upper) */
tramp[4] = 0xb0000000 | ((fn_closure_call_sysv >> 16) & 0xffff);
/* addik r3, r0, fn_closure_call_sysv(lower) */
tramp[5] = 0x30600000 | (fn_closure_call_sysv & 0xffff);
/* branch/jump to address stored in r11 (fn) */
tramp[6] = 0x98085800; /* bra r11 */
break;
default:
return FFI_BAD_ABI;
}
return FFI_OK;
}

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BeefySysLib/third_party/libffi/src/microblaze/ffitarget.h vendored Normal file
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/* -----------------------------------------------------------------------
ffitarget.h - Copyright (c) 2012, 2013 Xilinx, Inc
Target configuration macros for MicroBlaze.
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_H
#error "Please do not include ffitarget.h directly into your source. Use ffi.h instead."
#endif
#ifndef LIBFFI_ASM
typedef unsigned long ffi_arg;
typedef signed long ffi_sarg;
typedef enum ffi_abi {
FFI_FIRST_ABI = 0,
FFI_SYSV,
FFI_LAST_ABI,
FFI_DEFAULT_ABI = FFI_SYSV
} ffi_abi;
#endif
/* Definitions for closures */
#define FFI_CLOSURES 1
#define FFI_NATIVE_RAW_API 0
#define FFI_TRAMPOLINE_SIZE (4*8)
#endif

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BeefySysLib/third_party/libffi/src/microblaze/sysv.S vendored Normal file
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/* -----------------------------------------------------------------------
sysv.S - Copyright (c) 2012, 2013 Xilinx, Inc
MicroBlaze 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>
/*
* arg[0] (r5) = ffi_prep_args,
* arg[1] (r6) = &ecif,
* arg[2] (r7) = cif->bytes,
* arg[3] (r8) = cif->flags,
* arg[4] (r9) = ecif.rvalue,
* arg[5] (r10) = fn
* arg[6] (sp[0]) = cif->rtype->type
* arg[7] (sp[4]) = cif->rtype->size
*/
.text
.globl ffi_call_SYSV
.type ffi_call_SYSV, @function
ffi_call_SYSV:
/* push callee saves */
addik r1, r1, -20
swi r19, r1, 0 /* Frame Pointer */
swi r20, r1, 4 /* PIC register */
swi r21, r1, 8 /* PIC register */
swi r22, r1, 12 /* save for locals */
swi r23, r1, 16 /* save for locals */
/* save the r5-r10 registers in the stack */
addik r1, r1, -24 /* increment sp to store 6x 32-bit words */
swi r5, r1, 0
swi r6, r1, 4
swi r7, r1, 8
swi r8, r1, 12
swi r9, r1, 16
swi r10, r1, 20
/* save function pointer */
addik r3, r5, 0 /* copy ffi_prep_args into r3 */
addik r22, r1, 0 /* save sp for unallocated args into r22 (callee-saved) */
addik r23, r10, 0 /* save function address into r23 (callee-saved) */
/* prepare stack with allocation for n (bytes = r7) args */
rsub r1, r7, r1 /* subtract bytes from sp */
/* prep args for ffi_prep_args call */
addik r5, r1, 0 /* store stack pointer into arg[0] */
/* r6 still holds ecif for arg[1] */
/* Call ffi_prep_args(stack, &ecif). */
addik r1, r1, -4
swi r15, r1, 0 /* store the link register in the frame */
brald r15, r3
nop /* branch has delay slot */
lwi r15, r1, 0
addik r1, r1, 4 /* restore the link register from the frame */
/* returns calling stack pointer location */
/* prepare args for fn call, prep_args populates them onto the stack */
lwi r5, r1, 0 /* arg[0] */
lwi r6, r1, 4 /* arg[1] */
lwi r7, r1, 8 /* arg[2] */
lwi r8, r1, 12 /* arg[3] */
lwi r9, r1, 16 /* arg[4] */
lwi r10, r1, 20 /* arg[5] */
/* call (fn) (...). */
addik r1, r1, -4
swi r15, r1, 0 /* store the link register in the frame */
brald r15, r23
nop /* branch has delay slot */
lwi r15, r1, 0
addik r1, r1, 4 /* restore the link register from the frame */
/* Remove the space we pushed for the args. */
addik r1, r22, 0 /* restore old SP */
/* restore this functions parameters */
lwi r5, r1, 0 /* arg[0] */
lwi r6, r1, 4 /* arg[1] */
lwi r7, r1, 8 /* arg[2] */
lwi r8, r1, 12 /* arg[3] */
lwi r9, r1, 16 /* arg[4] */
lwi r10, r1, 20 /* arg[5] */
addik r1, r1, 24 /* decrement sp to de-allocate 6x 32-bit words */
/* If the return value pointer is NULL, assume no return value. */
beqi r9, ffi_call_SYSV_end
lwi r22, r1, 48 /* get return type (20 for locals + 28 for arg[6]) */
lwi r23, r1, 52 /* get return size (20 for locals + 32 for arg[7]) */
/* Check if return type is actually a struct, do nothing */
rsubi r11, r22, FFI_TYPE_STRUCT
beqi r11, ffi_call_SYSV_end
/* Return 8bit */
rsubi r11, r23, 1
beqi r11, ffi_call_SYSV_store8
/* Return 16bit */
rsubi r11, r23, 2
beqi r11, ffi_call_SYSV_store16
/* Return 32bit */
rsubi r11, r23, 4
beqi r11, ffi_call_SYSV_store32
/* Return 64bit */
rsubi r11, r23, 8
beqi r11, ffi_call_SYSV_store64
/* Didnt match anything */
bri ffi_call_SYSV_end
ffi_call_SYSV_store64:
swi r3, r9, 0 /* store word r3 into return value */
swi r4, r9, 4 /* store word r4 into return value */
bri ffi_call_SYSV_end
ffi_call_SYSV_store32:
swi r3, r9, 0 /* store word r3 into return value */
bri ffi_call_SYSV_end
ffi_call_SYSV_store16:
#ifdef __BIG_ENDIAN__
shi r3, r9, 2 /* store half-word r3 into return value */
#else
shi r3, r9, 0 /* store half-word r3 into return value */
#endif
bri ffi_call_SYSV_end
ffi_call_SYSV_store8:
#ifdef __BIG_ENDIAN__
sbi r3, r9, 3 /* store byte r3 into return value */
#else
sbi r3, r9, 0 /* store byte r3 into return value */
#endif
bri ffi_call_SYSV_end
ffi_call_SYSV_end:
/* callee restores */
lwi r19, r1, 0 /* frame pointer */
lwi r20, r1, 4 /* PIC register */
lwi r21, r1, 8 /* PIC register */
lwi r22, r1, 12
lwi r23, r1, 16
addik r1, r1, 20
/* return from sub-routine (with delay slot) */
rtsd r15, 8
nop
.size ffi_call_SYSV, . - ffi_call_SYSV
/* ------------------------------------------------------------------------- */
/*
* args passed into this function, are passed down to the callee.
* this function is the target of the closure trampoline, as such r12 is
* a pointer to the closure object.
*/
.text
.globl ffi_closure_SYSV
.type ffi_closure_SYSV, @function
ffi_closure_SYSV:
/* push callee saves */
addik r11, r1, 28 /* save stack args start location (excluding regs/link) */
addik r1, r1, -12
swi r19, r1, 0 /* Frame Pointer */
swi r20, r1, 4 /* PIC register */
swi r21, r1, 8 /* PIC register */
/* store register args on stack */
addik r1, r1, -24
swi r5, r1, 0
swi r6, r1, 4
swi r7, r1, 8
swi r8, r1, 12
swi r9, r1, 16
swi r10, r1, 20
/* setup args */
addik r5, r1, 0 /* register_args */
addik r6, r11, 0 /* stack_args */
addik r7, r12, 0 /* closure object */
addik r1, r1, -8 /* allocate return value */
addik r8, r1, 0 /* void* rvalue */
addik r1, r1, -8 /* allocate for reutrn type/size values */
addik r9, r1, 0 /* void* rtype */
addik r10, r1, 4 /* void* rsize */
/* call the wrap_call function */
addik r1, r1, -28 /* allocate args + link reg */
swi r15, r1, 0 /* store the link register in the frame */
brald r15, r3
nop /* branch has delay slot */
lwi r15, r1, 0
addik r1, r1, 28 /* restore the link register from the frame */
ffi_closure_SYSV_prepare_return:
lwi r9, r1, 0 /* rtype */
lwi r10, r1, 4 /* rsize */
addik r1, r1, 8 /* de-allocate return info values */
/* Check if return type is actually a struct, store 4 bytes */
rsubi r11, r9, FFI_TYPE_STRUCT
beqi r11, ffi_closure_SYSV_store32
/* Return 8bit */
rsubi r11, r10, 1
beqi r11, ffi_closure_SYSV_store8
/* Return 16bit */
rsubi r11, r10, 2
beqi r11, ffi_closure_SYSV_store16
/* Return 32bit */
rsubi r11, r10, 4
beqi r11, ffi_closure_SYSV_store32
/* Return 64bit */
rsubi r11, r10, 8
beqi r11, ffi_closure_SYSV_store64
/* Didnt match anything */
bri ffi_closure_SYSV_end
ffi_closure_SYSV_store64:
lwi r3, r1, 0 /* store word r3 into return value */
lwi r4, r1, 4 /* store word r4 into return value */
/* 64 bits == 2 words, no sign extend occurs */
bri ffi_closure_SYSV_end
ffi_closure_SYSV_store32:
lwi r3, r1, 0 /* store word r3 into return value */
/* 32 bits == 1 word, no sign extend occurs */
bri ffi_closure_SYSV_end
ffi_closure_SYSV_store16:
#ifdef __BIG_ENDIAN__
lhui r3, r1, 2 /* store half-word r3 into return value */
#else
lhui r3, r1, 0 /* store half-word r3 into return value */
#endif
rsubi r11, r9, FFI_TYPE_SINT16
bnei r11, ffi_closure_SYSV_end
sext16 r3, r3 /* fix sign extend of sint8 */
bri ffi_closure_SYSV_end
ffi_closure_SYSV_store8:
#ifdef __BIG_ENDIAN__
lbui r3, r1, 3 /* store byte r3 into return value */
#else
lbui r3, r1, 0 /* store byte r3 into return value */
#endif
rsubi r11, r9, FFI_TYPE_SINT8
bnei r11, ffi_closure_SYSV_end
sext8 r3, r3 /* fix sign extend of sint8 */
bri ffi_closure_SYSV_end
ffi_closure_SYSV_end:
addik r1, r1, 8 /* de-allocate return value */
/* de-allocate stored args */
addik r1, r1, 24
/* callee restores */
lwi r19, r1, 0 /* frame pointer */
lwi r20, r1, 4 /* PIC register */
lwi r21, r1, 8 /* PIC register */
addik r1, r1, 12
/* return from sub-routine (with delay slot) */
rtsd r15, 8
nop
.size ffi_closure_SYSV, . - ffi_closure_SYSV