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/* -----------------------------------------------------------------------
! ffi.c - Copyright (c) 1996, 1998, 1999, 2001, 2007, 2008 Red Hat, Inc.
Copyright (c) 2002 Ranjit Mathew
Copyright (c) 2002 Bo Thorsen
Copyright (c) 2002 Roger Sayle
Copyright (C) 2008, 2010 Free Software Foundation, Inc.
/* -----------------------------------------------------------------------
! ffi.c - Copyright (c) 2017 Anthony Green
+ Copyright (c) 1996, 1998, 1999, 2001, 2007, 2008 Red Hat, Inc.
Copyright (c) 2002 Ranjit Mathew
Copyright (c) 2002 Bo Thorsen
Copyright (c) 2002 Roger Sayle
Copyright (C) 2008, 2010 Free Software Foundation, Inc.
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.
----------------------------------------------------------------------- */
! #if !defined(__x86_64__) || defined(_WIN64) || defined(__CYGWIN__)
-
- #ifdef _WIN64
- #include <windows.h>
- #endif
-
#include <ffi.h>
#include <ffi_common.h>
!
#include <stdlib.h>
!
!
! /* ffi_prep_args is called by the assembly routine once stack space
! has been allocated for the function's arguments */
!
! unsigned int ffi_prep_args(char *stack, extended_cif *ecif);
! unsigned int ffi_prep_args(char *stack, extended_cif *ecif)
! {
- register unsigned int i;
- register void **p_argv;
- register char *argp;
- register ffi_type **p_arg;
- #ifndef X86_WIN64
- const int cabi = ecif->cif->abi;
- const int dir = (cabi == FFI_PASCAL || cabi == FFI_REGISTER) ? -1 : +1;
- unsigned int stack_args_count = 0;
- void *p_stack_data[3];
- char *argp2 = stack;
#else
! #define dir 1
#endif
! argp = stack;
!
- if ((ecif->cif->flags == FFI_TYPE_STRUCT
- || ecif->cif->flags == FFI_TYPE_MS_STRUCT)
- #ifdef X86_WIN64
- && ((ecif->cif->rtype->size & (1 | 2 | 4 | 8)) == 0)
#endif
! )
! {
! #ifndef X86_WIN64
! /* For fastcall/thiscall/register this is first register-passed
! argument. */
! if (cabi == FFI_THISCALL || cabi == FFI_FASTCALL || cabi == FFI_REGISTER)
- {
- p_stack_data[stack_args_count] = argp;
- ++stack_args_count;
- }
#endif
! *(void **) argp = ecif->rvalue;
! argp += sizeof(void*);
! }
! p_arg = ecif->cif->arg_types;
- p_argv = ecif->avalue;
- if (dir < 0)
{
! const int nargs = ecif->cif->nargs - 1;
! if (nargs > 0)
! {
! p_arg += nargs;
! p_argv += nargs;
}
- }
! for (i = ecif->cif->nargs;
- i != 0;
- i--, p_arg += dir, p_argv += dir)
{
! #ifdef GSTREAMER_LITE
! size_t z = 0;
- #endif // GSTREAMER_LITE
-
- /* Align if necessary */
- if ((sizeof(void*) - 1) & (size_t) argp)
- argp = (char *) ALIGN(argp, sizeof(void*));
-
- #ifdef GSTREAMER_LITE
- z = (*p_arg)->size;
- #else // GSTREAMER_LITE
- size_t z = (*p_arg)->size;
- #endif // GSTREAMER_LITE
-
- #ifdef X86_WIN64
- if (z > FFI_SIZEOF_ARG
- || ((*p_arg)->type == FFI_TYPE_STRUCT
- && (z & (1 | 2 | 4 | 8)) == 0)
- #if FFI_TYPE_DOUBLE != FFI_TYPE_LONGDOUBLE
- || ((*p_arg)->type == FFI_TYPE_LONGDOUBLE)
- #endif
- )
- {
- z = FFI_SIZEOF_ARG;
- *(void **)argp = *p_argv;
- }
- else if ((*p_arg)->type == FFI_TYPE_FLOAT)
- {
- memcpy(argp, *p_argv, z);
- }
- else
- #endif
- if (z < FFI_SIZEOF_ARG)
- {
- z = FFI_SIZEOF_ARG;
- switch ((*p_arg)->type)
- {
- case FFI_TYPE_SINT8:
- *(ffi_sarg *) argp = (ffi_sarg)*(SINT8 *)(* p_argv);
break;
!
case FFI_TYPE_UINT8:
! *(ffi_arg *) argp = (ffi_arg)*(UINT8 *)(* p_argv);
break;
!
case FFI_TYPE_SINT16:
! *(ffi_sarg *) argp = (ffi_sarg)*(SINT16 *)(* p_argv);
break;
!
- case FFI_TYPE_UINT16:
- *(ffi_arg *) argp = (ffi_arg)*(UINT16 *)(* p_argv);
- break;
-
case FFI_TYPE_SINT32:
- *(ffi_sarg *) argp = (ffi_sarg)*(SINT32 *)(* p_argv);
- break;
-
case FFI_TYPE_UINT32:
! *(ffi_arg *) argp = (ffi_arg)*(UINT32 *)(* p_argv);
break;
!
case FFI_TYPE_STRUCT:
! *(ffi_arg *) argp = *(ffi_arg *)(* p_argv);
break;
-
default:
! FFI_ASSERT(0);
}
}
! else
{
! memcpy(argp, *p_argv, z);
}
! #ifndef X86_WIN64
- /* For thiscall/fastcall/register convention register-passed arguments
- are the first two none-floating-point arguments with a size
- smaller or equal to sizeof (void*). */
- if ((z == FFI_SIZEOF_ARG)
- && ((cabi == FFI_REGISTER)
- || (cabi == FFI_THISCALL && stack_args_count < 1)
- || (cabi == FFI_FASTCALL && stack_args_count < 2))
- && ((*p_arg)->type != FFI_TYPE_FLOAT && (*p_arg)->type != FFI_TYPE_STRUCT)
- )
{
! if (dir < 0 && stack_args_count > 2)
! {
! /* Iterating arguments backwards, so first register-passed argument
! will be passed last. Shift temporary values to make place. */
- p_stack_data[0] = p_stack_data[1];
- p_stack_data[1] = p_stack_data[2];
- stack_args_count = 2;
- }
-
- p_stack_data[stack_args_count] = argp;
- ++stack_args_count;
}
! #endif
! #ifdef X86_WIN64
- argp += (z + sizeof(void*) - 1) & ~(sizeof(void*) - 1);
- #else
- argp += z;
- #endif
}
! #ifndef X86_WIN64
! /* We need to move the register-passed arguments for thiscall/fastcall/register
- on top of stack, so that those can be moved to registers by call-handler. */
- if (stack_args_count > 0)
{
! #ifdef GSTREAMER_LITE
- int i;
- #endif // GSTREAMER_LITE
- if (dir < 0 && stack_args_count > 1)
{
! /* Reverse order if iterating arguments backwards */
! ffi_arg tmp = *(ffi_arg*) p_stack_data[0];
! *(ffi_arg*) p_stack_data[0] = *(ffi_arg*) p_stack_data[stack_args_count - 1];
! *(ffi_arg*) p_stack_data[stack_args_count - 1] = tmp;
! }
! #ifndef GSTREAMER_LITE
! int i;
! #endif // GSTREAMER_LITE
! for (i = 0; i < stack_args_count; i++)
! {
- if (p_stack_data[i] != argp2)
- {
- ffi_arg tmp = *(ffi_arg*) p_stack_data[i];
- memmove (argp2 + FFI_SIZEOF_ARG, argp2, (size_t) ((char*) p_stack_data[i] - (char*)argp2));
- *(ffi_arg *) argp2 = tmp;
- }
! argp2 += FFI_SIZEOF_ARG;
}
}
! return stack_args_count;
- #endif
- return 0;
- }
-
- /* Perform machine dependent cif processing */
- ffi_status ffi_prep_cif_machdep(ffi_cif *cif)
{
! unsigned int i;
! ffi_type **ptr;
!
! /* Set the return type flag */
! switch (cif->rtype->type)
! {
! case FFI_TYPE_VOID:
! case FFI_TYPE_UINT8:
! case FFI_TYPE_UINT16:
! case FFI_TYPE_SINT8:
! case FFI_TYPE_SINT16:
! #ifdef X86_WIN64
! case FFI_TYPE_UINT32:
! case FFI_TYPE_SINT32:
! #endif
! case FFI_TYPE_SINT64:
! case FFI_TYPE_FLOAT:
! case FFI_TYPE_DOUBLE:
! #ifndef X86_WIN64
! #if FFI_TYPE_DOUBLE != FFI_TYPE_LONGDOUBLE
! case FFI_TYPE_LONGDOUBLE:
#endif
#endif
- cif->flags = (unsigned) cif->rtype->type;
- break;
! case FFI_TYPE_UINT64:
- #ifdef X86_WIN64
- case FFI_TYPE_POINTER:
- #endif
- cif->flags = FFI_TYPE_SINT64;
- break;
! case FFI_TYPE_STRUCT:
! #ifndef X86
! if (cif->rtype->size == 1)
- {
- cif->flags = FFI_TYPE_SMALL_STRUCT_1B; /* same as char size */
- }
- else if (cif->rtype->size == 2)
- {
- cif->flags = FFI_TYPE_SMALL_STRUCT_2B; /* same as short size */
- }
- else if (cif->rtype->size == 4)
{
! #ifdef X86_WIN64
! cif->flags = FFI_TYPE_SMALL_STRUCT_4B;
! #else
! cif->flags = FFI_TYPE_INT; /* same as int type */
! #endif
! }
! else if (cif->rtype->size == 8)
{
! cif->flags = FFI_TYPE_SINT64; /* same as int64 type */
- }
- else
- #endif
{
! #ifdef X86_WIN32
! if (cif->abi == FFI_MS_CDECL)
! cif->flags = FFI_TYPE_MS_STRUCT;
! else
! #endif
! cif->flags = FFI_TYPE_STRUCT;
! /* allocate space for return value pointer */
! cif->bytes += ALIGN(sizeof(void*), FFI_SIZEOF_ARG);
- }
break;
-
default:
! #ifdef X86_WIN64
! cif->flags = FFI_TYPE_SINT64;
- break;
- case FFI_TYPE_INT:
- cif->flags = FFI_TYPE_SINT32;
- #else
- cif->flags = FFI_TYPE_INT;
- #endif
break;
}
-
- for (ptr = cif->arg_types, i = cif->nargs; i > 0; i--, ptr++)
- {
- if (((*ptr)->alignment - 1) & cif->bytes)
- cif->bytes = ALIGN(cif->bytes, (*ptr)->alignment);
- cif->bytes += (unsigned)ALIGN((*ptr)->size, FFI_SIZEOF_ARG);
}
! #ifdef X86_WIN64
! /* ensure space for storing four registers */
! cif->bytes += 4 * FFI_SIZEOF_ARG;
! #endif
! #ifndef X86_WIN32
! #ifndef X86_WIN64
! if (cif->abi == FFI_SYSV || cif->abi == FFI_UNIX64)
! #endif
- cif->bytes = (cif->bytes + 15) & ~0xF;
- #endif
! return FFI_OK;
}
! #ifdef X86_WIN64
! extern int
! ffi_call_win64(unsigned int (*)(char *, extended_cif *), extended_cif *,
! unsigned, unsigned, unsigned *, void (*fn)(void));
! #else
! extern void
! ffi_call_win32(unsigned int (*)(char *, extended_cif *), extended_cif *,
- unsigned, unsigned, unsigned, unsigned *, void (*fn)(void));
- extern void ffi_call_SYSV(void (*)(char *, extended_cif *), extended_cif *,
- unsigned, unsigned, unsigned *, void (*fn)(void));
- #endif
! 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 */
-
- #ifdef X86_WIN64
- if (rvalue == NULL
- && cif->flags == FFI_TYPE_STRUCT
- && ((cif->rtype->size & (1 | 2 | 4 | 8)) == 0))
{
! ecif.rvalue = alloca((cif->rtype->size + 0xF) & ~0xF);
}
! #else
- if (rvalue == NULL
- && (cif->flags == FFI_TYPE_STRUCT
- || cif->flags == FFI_TYPE_MS_STRUCT))
{
! ecif.rvalue = alloca(cif->rtype->size);
}
- #endif
else
- ecif.rvalue = rvalue;
-
-
- switch (cif->abi)
{
! #ifdef X86_WIN64
! case FFI_WIN64:
! ffi_call_win64(ffi_prep_args, &ecif, cif->bytes,
! cif->flags, ecif.rvalue, fn);
! break;
! #else
! #ifndef X86_WIN32
! case FFI_SYSV:
! ffi_call_SYSV(ffi_prep_args, &ecif, cif->bytes, cif->flags, ecif.rvalue,
! fn);
! break;
! #else
! case FFI_SYSV:
! case FFI_MS_CDECL:
! #endif
! case FFI_STDCALL:
! case FFI_THISCALL:
! case FFI_FASTCALL:
! case FFI_PASCAL:
! case FFI_REGISTER:
! ffi_call_win32(ffi_prep_args, &ecif, cif->abi, cif->bytes, cif->flags,
! ecif.rvalue, fn);
! break;
! #endif
! default:
! FFI_ASSERT(0);
! break;
}
}
!
- /** private members **/
-
- /* The following __attribute__((regparm(1))) decorations will have no effect
- on MSVC or SUNPRO_C -- standard conventions apply. */
- static unsigned int ffi_prep_incoming_args (char *stack, void **ret,
- void** args, ffi_cif* cif);
- void FFI_HIDDEN ffi_closure_SYSV (ffi_closure *)
- __attribute__ ((regparm(1)));
- unsigned int FFI_HIDDEN ffi_closure_SYSV_inner (ffi_closure *, void **, void *)
- __attribute__ ((regparm(1)));
- unsigned int FFI_HIDDEN ffi_closure_WIN32_inner (ffi_closure *, void **, void *)
- __attribute__ ((regparm(1)));
- void FFI_HIDDEN ffi_closure_raw_SYSV (ffi_raw_closure *)
- __attribute__ ((regparm(1)));
- #ifdef X86_WIN32
- void FFI_HIDDEN ffi_closure_raw_THISCALL (ffi_raw_closure *)
- __attribute__ ((regparm(1)));
- #endif
- #ifndef X86_WIN64
- void FFI_HIDDEN ffi_closure_STDCALL (ffi_closure *);
- void FFI_HIDDEN ffi_closure_THISCALL (ffi_closure *);
- void FFI_HIDDEN ffi_closure_FASTCALL (ffi_closure *);
- void FFI_HIDDEN ffi_closure_REGISTER (ffi_closure *);
- #else
- void FFI_HIDDEN ffi_closure_win64 (ffi_closure *);
- #endif
-
- /* This function is jumped to by the trampoline */
-
- #ifdef X86_WIN64
- void * FFI_HIDDEN
- ffi_closure_win64_inner (ffi_closure *closure, void *args) {
- ffi_cif *cif;
- void **arg_area;
- void *result;
- void *resp = &result;
-
- cif = closure->cif;
- arg_area = (void**) alloca (cif->nargs * sizeof (void*));
-
- /* 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 change RESP to point to the
- * structure return address. */
-
- ffi_prep_incoming_args(args, &resp, arg_area, cif);
-
- (closure->fun) (cif, resp, arg_area, closure->user_data);
-
- /* The result is returned in rax. This does the right thing for
- result types except for floats; we have to 'mov xmm0, rax' in the
- caller to correct this.
- TODO: structure sizes of 3 5 6 7 are returned by reference, too!!!
- */
- return cif->rtype->size > sizeof(void *) ? resp : *(void **)resp;
}
! #else
! unsigned int FFI_HIDDEN __attribute__ ((regparm(1)))
- ffi_closure_SYSV_inner (ffi_closure *closure, void **respp, void *args)
{
! /* our various things... */
- ffi_cif *cif;
- void **arg_area;
-
- cif = closure->cif;
- arg_area = (void**) alloca (cif->nargs * sizeof (void*));
-
- /* 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 change RESP to point to the
- * structure return address. */
-
- ffi_prep_incoming_args(args, respp, arg_area, cif);
-
- (closure->fun) (cif, *respp, arg_area, closure->user_data);
-
- return cif->flags;
}
! unsigned int FFI_HIDDEN __attribute__ ((regparm(1)))
! ffi_closure_WIN32_inner (ffi_closure *closure, void **respp, void *args)
{
! /* our various things... */
- ffi_cif *cif;
- void **arg_area;
- unsigned int ret;
-
- cif = closure->cif;
- arg_area = (void**) alloca (cif->nargs * sizeof (void*));
-
- /* 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 change RESP to point to the
- * structure return address. */
-
- ret = ffi_prep_incoming_args(args, respp, arg_area, cif);
-
- (closure->fun) (cif, *respp, arg_area, closure->user_data);
-
- return ret;
}
- #endif /* !X86_WIN64 */
! static unsigned int
- ffi_prep_incoming_args(char *stack, void **rvalue, void **avalue,
- ffi_cif *cif)
- {
- register unsigned int i;
- register void **p_argv;
- register char *argp;
- register ffi_type **p_arg;
- #ifndef X86_WIN64
- const int cabi = cif->abi;
- const int dir = (cabi == FFI_PASCAL || cabi == FFI_REGISTER) ? -1 : +1;
- const unsigned int max_stack_count = (cabi == FFI_THISCALL) ? 1
- : (cabi == FFI_FASTCALL) ? 2
- : (cabi == FFI_REGISTER) ? 3
- : 0;
- unsigned int passed_regs = 0;
- void *p_stack_data[3] = { stack - 1 };
- #else
- #define dir 1
- #endif
! argp = stack;
! #ifndef X86_WIN64
! argp += max_stack_count * FFI_SIZEOF_ARG;
- #endif
! if ((cif->flags == FFI_TYPE_STRUCT
! || cif->flags == FFI_TYPE_MS_STRUCT)
! #ifdef X86_WIN64
! && ((cif->rtype->size & (1 | 2 | 4 | 8)) == 0)
! #endif
! )
{
! #ifndef X86_WIN64
! if (passed_regs < max_stack_count)
{
! *rvalue = *(void**) (stack + (passed_regs*FFI_SIZEOF_ARG));
! ++passed_regs;
}
! else
! #endif
! {
- *rvalue = *(void **) argp;
argp += sizeof(void *);
}
- }
! #ifndef X86_WIN64
! /* Do register arguments first */
! for (i = 0, p_arg = cif->arg_types;
! i < cif->nargs && passed_regs < max_stack_count;
! i++, p_arg++)
{
! #ifdef GSTREAMER_LITE
! size_t sz = 0;
! #endif // GSTREAMER_LITE
! if ((*p_arg)->type == FFI_TYPE_FLOAT
- || (*p_arg)->type == FFI_TYPE_STRUCT)
- continue;
-
- #ifdef GSTREAMER_LITE
- sz = (*p_arg)->size;
- #else // GSTREAMER_LITE
- size_t sz = (*p_arg)->size;
- #endif // GSTREAMER_LITE
- if(sz == 0 || sz > FFI_SIZEOF_ARG)
- continue;
-
- p_stack_data[passed_regs] = avalue + i;
- avalue[i] = stack + (passed_regs*FFI_SIZEOF_ARG);
- ++passed_regs;
- }
- #endif
! p_arg = cif->arg_types;
- p_argv = avalue;
- if (dir < 0)
{
! const int nargs = cif->nargs - 1;
! if (nargs > 0)
{
! p_arg += nargs;
! p_argv += nargs;
}
}
!
! for (i = cif->nargs;
- i != 0;
- i--, p_arg += dir, p_argv += dir)
{
! #ifdef GSTREAMER_LITE
! size_t z = 0;
! #endif // GSTREAMER_LITE
! /* Align if necessary */
! if ((sizeof(void*) - 1) & (size_t) argp)
! argp = (char *) ALIGN(argp, sizeof(void*));
!
! #ifdef GSTREAMER_LITE
! z = (*p_arg)->size;
! #else // GSTREAMER_LITE
! size_t z = (*p_arg)->size;
! #endif // GSTREAMER_LITE
!
! #ifdef X86_WIN64
! if (z > FFI_SIZEOF_ARG
! || ((*p_arg)->type == FFI_TYPE_STRUCT
! && (z & (1 | 2 | 4 | 8)) == 0)
- #if FFI_TYPE_DOUBLE != FFI_TYPE_LONGDOUBLE
- || ((*p_arg)->type == FFI_TYPE_LONGDOUBLE)
- #endif
- )
{
! z = FFI_SIZEOF_ARG;
! *p_argv = *(void **)argp;
}
else
- #else
- if (passed_regs > 0
- && z <= FFI_SIZEOF_ARG
- && (p_argv == p_stack_data[0]
- || p_argv == p_stack_data[1]
- || p_argv == p_stack_data[2]))
{
! /* Already assigned a register value */
! continue;
}
- else
- #endif
- {
- /* because we're little endian, this is what it turns into. */
- *p_argv = (void*) argp;
}
! #ifdef X86_WIN64
- argp += (z + sizeof(void*) - 1) & ~(sizeof(void*) - 1);
- #else
- argp += z;
- #endif
}
! return (size_t)argp - (size_t)stack;
- }
! #define FFI_INIT_TRAMPOLINE_WIN64(TRAMP,FUN,CTX,MASK) \
! { unsigned char *__tramp = (unsigned char*)(TRAMP); \
! void* __fun = (void*)(FUN); \
! void* __ctx = (void*)(CTX); \
- *(unsigned char*) &__tramp[0] = 0x41; \
- *(unsigned char*) &__tramp[1] = 0xbb; \
- *(unsigned int*) &__tramp[2] = MASK; /* mov $mask, %r11 */ \
- *(unsigned char*) &__tramp[6] = 0x48; \
- *(unsigned char*) &__tramp[7] = 0xb8; \
- *(void**) &__tramp[8] = __ctx; /* mov __ctx, %rax */ \
- *(unsigned char *) &__tramp[16] = 0x49; \
- *(unsigned char *) &__tramp[17] = 0xba; \
- *(void**) &__tramp[18] = __fun; /* mov __fun, %r10 */ \
- *(unsigned char *) &__tramp[26] = 0x41; \
- *(unsigned char *) &__tramp[27] = 0xff; \
- *(unsigned char *) &__tramp[28] = 0xe2; /* jmp %r10 */ \
- }
-
- /* How to make a trampoline. Derived from gcc/config/i386/i386.c. */
-
- #define FFI_INIT_TRAMPOLINE(TRAMP,FUN,CTX) \
- { unsigned char *__tramp = (unsigned char*)(TRAMP); \
- unsigned int __fun = (unsigned int)(FUN); \
- unsigned int __ctx = (unsigned int)(CTX); \
- unsigned int __dis = __fun - (__ctx + 10); \
- *(unsigned char*) &__tramp[0] = 0xb8; \
- *(unsigned int*) &__tramp[1] = __ctx; /* movl __ctx, %eax */ \
- *(unsigned char*) &__tramp[5] = 0xe9; \
- *(unsigned int*) &__tramp[6] = __dis; /* jmp __fun */ \
- }
-
- #define FFI_INIT_TRAMPOLINE_RAW_THISCALL(TRAMP,FUN,CTX,SIZE) \
- { unsigned char *__tramp = (unsigned char*)(TRAMP); \
- unsigned int __fun = (unsigned int)(FUN); \
- unsigned int __ctx = (unsigned int)(CTX); \
- unsigned int __dis = __fun - (__ctx + 49); \
- unsigned short __size = (unsigned short)(SIZE); \
- *(unsigned int *) &__tramp[0] = 0x8324048b; /* mov (%esp), %eax */ \
- *(unsigned int *) &__tramp[4] = 0x4c890cec; /* sub $12, %esp */ \
- *(unsigned int *) &__tramp[8] = 0x04890424; /* mov %ecx, 4(%esp) */ \
- *(unsigned char*) &__tramp[12] = 0x24; /* mov %eax, (%esp) */ \
- *(unsigned char*) &__tramp[13] = 0xb8; \
- *(unsigned int *) &__tramp[14] = __size; /* mov __size, %eax */ \
- *(unsigned int *) &__tramp[18] = 0x08244c8d; /* lea 8(%esp), %ecx */ \
- *(unsigned int *) &__tramp[22] = 0x4802e8c1; /* shr $2, %eax ; dec %eax */ \
- *(unsigned short*) &__tramp[26] = 0x0b74; /* jz 1f */ \
- *(unsigned int *) &__tramp[28] = 0x8908518b; /* 2b: mov 8(%ecx), %edx */ \
- *(unsigned int *) &__tramp[32] = 0x04c18311; /* mov %edx, (%ecx) ; add $4, %ecx */ \
- *(unsigned char*) &__tramp[36] = 0x48; /* dec %eax */ \
- *(unsigned short*) &__tramp[37] = 0xf575; /* jnz 2b ; 1f: */ \
- *(unsigned char*) &__tramp[39] = 0xb8; \
- *(unsigned int*) &__tramp[40] = __ctx; /* movl __ctx, %eax */ \
- *(unsigned char *) &__tramp[44] = 0xe8; \
- *(unsigned int*) &__tramp[45] = __dis; /* call __fun */ \
- *(unsigned char*) &__tramp[49] = 0xc2; /* ret */ \
- *(unsigned short*) &__tramp[50] = (__size + 8); /* ret (__size + 8) */ \
- }
-
- #define FFI_INIT_TRAMPOLINE_WIN32(TRAMP,FUN,CTX) \
- { unsigned char *__tramp = (unsigned char*)(TRAMP); \
- unsigned int __fun = (unsigned int)(FUN); \
- unsigned int __ctx = (unsigned int)(CTX); \
- unsigned int __dis = __fun - (__ctx + 10); \
- *(unsigned char*) &__tramp[0] = 0x68; \
- *(unsigned int*) &__tramp[1] = __ctx; /* push __ctx */ \
- *(unsigned char*) &__tramp[5] = 0xe9; \
- *(unsigned int*) &__tramp[6] = __dis; /* jmp __fun */ \
}
- /* the cif must already be prep'ed */
-
ffi_status
ffi_prep_closure_loc (ffi_closure* closure,
ffi_cif* cif,
void (*fun)(ffi_cif*,void*,void**,void*),
void *user_data,
void *codeloc)
{
! #ifdef X86_WIN64
! #define ISFLOAT(IDX) (cif->arg_types[IDX]->type == FFI_TYPE_FLOAT || cif->arg_types[IDX]->type == FFI_TYPE_DOUBLE)
! #define FLAG(IDX) (cif->nargs>(IDX)&&ISFLOAT(IDX)?(1<<(IDX)):0)
! if (cif->abi == FFI_WIN64)
! {
- int mask = FLAG(0)|FLAG(1)|FLAG(2)|FLAG(3);
- FFI_INIT_TRAMPOLINE_WIN64 (&closure->tramp[0],
- &ffi_closure_win64,
- codeloc, mask);
- /* make sure we can execute here */
- }
- #else
- if (cif->abi == FFI_SYSV)
- {
- FFI_INIT_TRAMPOLINE (&closure->tramp[0],
- &ffi_closure_SYSV,
- (void*)codeloc);
- }
- else if (cif->abi == FFI_REGISTER)
- {
- FFI_INIT_TRAMPOLINE_WIN32 (&closure->tramp[0],
- &ffi_closure_REGISTER,
- (void*)codeloc);
- }
- else if (cif->abi == FFI_FASTCALL)
- {
- FFI_INIT_TRAMPOLINE_WIN32 (&closure->tramp[0],
- &ffi_closure_FASTCALL,
- (void*)codeloc);
- }
- else if (cif->abi == FFI_THISCALL)
{
! FFI_INIT_TRAMPOLINE_WIN32 (&closure->tramp[0],
! &ffi_closure_THISCALL,
! (void*)codeloc);
}
! else if (cif->abi == FFI_STDCALL || cif->abi == FFI_PASCAL)
! {
! FFI_INIT_TRAMPOLINE_WIN32 (&closure->tramp[0],
! &ffi_closure_STDCALL,
! (void*)codeloc);
}
! #ifdef X86_WIN32
! else if (cif->abi == FFI_MS_CDECL)
{
! FFI_INIT_TRAMPOLINE (&closure->tramp[0],
! &ffi_closure_SYSV,
! (void*)codeloc);
- }
- #endif /* X86_WIN32 */
- #endif /* !X86_WIN64 */
- else
{
return FFI_BAD_ABI;
}
! closure->cif = cif;
! closure->user_data = user_data;
! closure->fun = fun;
return FFI_OK;
}
/* ------- Native raw API support -------------------------------- */
#if !FFI_NO_RAW_API
ffi_status
! ffi_prep_raw_closure_loc (ffi_raw_closure* closure,
! ffi_cif* cif,
void (*fun)(ffi_cif*,void*,ffi_raw*,void*),
void *user_data,
void *codeloc)
{
int i;
! if (cif->abi != FFI_SYSV
- #ifdef X86_WIN32
- && cif->abi != FFI_THISCALL
- #endif
- )
- return FFI_BAD_ABI;
-
- /* we currently don't support certain kinds of arguments for raw
closures. This should be implemented by a separate assembly
language routine, since it would require argument processing,
something we don't do now for performance. */
-
for (i = cif->nargs-1; i >= 0; i--)
{
! FFI_ASSERT (cif->arg_types[i]->type != FFI_TYPE_STRUCT);
! FFI_ASSERT (cif->arg_types[i]->type != FFI_TYPE_LONGDOUBLE);
}
! #ifdef X86_WIN32
- if (cif->abi == FFI_SYSV)
- {
- #endif
- FFI_INIT_TRAMPOLINE (&closure->tramp[0], &ffi_closure_raw_SYSV,
- codeloc);
- #ifdef X86_WIN32
- }
- else if (cif->abi == FFI_THISCALL)
{
! FFI_INIT_TRAMPOLINE_RAW_THISCALL (&closure->tramp[0], &ffi_closure_raw_THISCALL, codeloc, cif->bytes);
}
! #endif
! closure->cif = cif;
closure->user_data = user_data;
- closure->fun = fun;
return FFI_OK;
}
! static unsigned int
! ffi_prep_args_raw(char *stack, extended_cif *ecif)
{
! const ffi_cif *cif = ecif->cif;
! unsigned int i, passed_regs = 0;
! #ifndef X86_WIN64
! const unsigned int abi = cif->abi;
! const unsigned int max_regs = (abi == FFI_THISCALL) ? 1
! : (abi == FFI_FASTCALL) ? 2
! : (abi == FFI_REGISTER) ? 3
! : 0;
! if (cif->flags == FFI_TYPE_STRUCT)
! ++passed_regs;
! for (i = 0; i < cif->nargs && passed_regs <= max_regs; i++)
{
! #ifdef GSTREAMER_LITE
! size_t sz = 0;
! #endif // GSTREAMER_LITE
! if (cif->arg_types[i]->type == FFI_TYPE_FLOAT
! || cif->arg_types[i]->type == FFI_TYPE_STRUCT)
! continue;
!
- #ifdef GSTREAMER_LITE
- sz = cif->arg_types[i]->size;
- #else // GSTREAMER_LITE
- size_t sz = cif->arg_types[i]->size;
- #endif // GSTREAMER_LITE
- if (sz == 0 || sz > FFI_SIZEOF_ARG)
- continue;
-
- ++passed_regs;
- }
- #endif
-
- memcpy (stack, ecif->avalue, cif->bytes);
- return passed_regs;
}
! /* we borrow this routine from libffi (it must be changed, though, to
! * actually call the function passed in the first argument. as of
- * libffi-1.20, this is not the case.)
- */
-
- void
- ffi_raw_call(ffi_cif *cif, void (*fn)(void), void *rvalue, ffi_raw *fake_avalue)
{
! extended_cif ecif;
! void **avalue = (void **)fake_avalue;
!
- 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->flags == FFI_TYPE_STRUCT
- || cif->flags == FFI_TYPE_MS_STRUCT))
{
! ecif.rvalue = alloca(cif->rtype->size);
}
else
- ecif.rvalue = rvalue;
-
-
- switch (cif->abi)
{
! #ifndef X86_WIN32
! case FFI_SYSV:
! ffi_call_SYSV(ffi_prep_args_raw, &ecif, cif->bytes, cif->flags,
- ecif.rvalue, fn);
- break;
- #else
- case FFI_SYSV:
- case FFI_MS_CDECL:
- #endif
- #ifndef X86_WIN64
- case FFI_STDCALL:
- case FFI_THISCALL:
- case FFI_FASTCALL:
- case FFI_PASCAL:
- case FFI_REGISTER:
- ffi_call_win32(ffi_prep_args_raw, &ecif, cif->abi, cif->bytes, cif->flags,
- ecif.rvalue, fn);
- break;
- #endif
- default:
- FFI_ASSERT(0);
- break;
}
}
! #endif
!
! #endif /* !__x86_64__ || X86_WIN64 */
!
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.
----------------------------------------------------------------------- */
! #if defined(__i386__) || defined(_M_IX86)
#include <ffi.h>
#include <ffi_common.h>
! #include <stdint.h>
#include <stdlib.h>
! #include "internal.h"
!
! /* Force FFI_TYPE_LONGDOUBLE to be different than FFI_TYPE_DOUBLE;
! all further uses in this file will refer to the 80-bit type. */
! #if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE
! # if FFI_TYPE_LONGDOUBLE != 4
! # error FFI_TYPE_LONGDOUBLE out of date
! # endif
#else
! # undef FFI_TYPE_LONGDOUBLE
+ # define FFI_TYPE_LONGDOUBLE 4
#endif
! #if defined(__GNUC__) && !defined(__declspec)
! # define __declspec(x) __attribute__((x))
#endif
!
! #if defined(_MSC_VER) && defined(_M_IX86)
! /* Stack is not 16-byte aligned on Windows. */
! #define STACK_ALIGN(bytes) (bytes)
! #else
! #define STACK_ALIGN(bytes) FFI_ALIGN (bytes, 16)
#endif
! /* Perform machine dependent cif processing. */
! ffi_status FFI_HIDDEN
! ffi_prep_cif_machdep(ffi_cif *cif)
+ {
+ size_t bytes = 0;
+ int i, n, flags, cabi = cif->abi;
! switch (cabi)
{
! case FFI_SYSV:
! case FFI_STDCALL:
! case FFI_THISCALL:
! case FFI_FASTCALL:
! case FFI_MS_CDECL:
+ case FFI_PASCAL:
+ case FFI_REGISTER:
+ break;
+ default:
+ return FFI_BAD_ABI;
}
! switch (cif->rtype->type)
{
! case FFI_TYPE_VOID:
! flags = X86_RET_VOID;
break;
! case FFI_TYPE_FLOAT:
+ flags = X86_RET_FLOAT;
+ break;
+ case FFI_TYPE_DOUBLE:
+ flags = X86_RET_DOUBLE;
+ break;
+ case FFI_TYPE_LONGDOUBLE:
+ flags = X86_RET_LDOUBLE;
+ break;
case FFI_TYPE_UINT8:
! flags = X86_RET_UINT8;
break;
! case FFI_TYPE_UINT16:
+ flags = X86_RET_UINT16;
+ break;
+ case FFI_TYPE_SINT8:
+ flags = X86_RET_SINT8;
+ break;
case FFI_TYPE_SINT16:
! flags = X86_RET_SINT16;
break;
! case FFI_TYPE_INT:
case FFI_TYPE_SINT32:
case FFI_TYPE_UINT32:
! case FFI_TYPE_POINTER:
+ flags = X86_RET_INT32;
break;
! case FFI_TYPE_SINT64:
+ case FFI_TYPE_UINT64:
+ flags = X86_RET_INT64;
+ break;
case FFI_TYPE_STRUCT:
! #ifndef X86
+ /* ??? This should be a different ABI rather than an ifdef. */
+ if (cif->rtype->size == 1)
+ flags = X86_RET_STRUCT_1B;
+ else if (cif->rtype->size == 2)
+ flags = X86_RET_STRUCT_2B;
+ else if (cif->rtype->size == 4)
+ flags = X86_RET_INT32;
+ else if (cif->rtype->size == 8)
+ flags = X86_RET_INT64;
+ else
+ #endif
+ {
+ do_struct:
+ switch (cabi)
+ {
+ case FFI_THISCALL:
+ case FFI_FASTCALL:
+ case FFI_STDCALL:
+ case FFI_MS_CDECL:
+ flags = X86_RET_STRUCTARG;
break;
default:
! flags = X86_RET_STRUCTPOP;
+ break;
}
+ /* Allocate space for return value pointer. */
+ bytes += FFI_ALIGN (sizeof(void*), FFI_SIZEOF_ARG);
}
! break;
+ case FFI_TYPE_COMPLEX:
+ switch (cif->rtype->elements[0]->type)
{
! case FFI_TYPE_DOUBLE:
+ case FFI_TYPE_LONGDOUBLE:
+ case FFI_TYPE_SINT64:
+ case FFI_TYPE_UINT64:
+ goto do_struct;
+ case FFI_TYPE_FLOAT:
+ case FFI_TYPE_INT:
+ case FFI_TYPE_SINT32:
+ case FFI_TYPE_UINT32:
+ flags = X86_RET_INT64;
+ break;
+ case FFI_TYPE_SINT16:
+ case FFI_TYPE_UINT16:
+ flags = X86_RET_INT32;
+ break;
+ case FFI_TYPE_SINT8:
+ case FFI_TYPE_UINT8:
+ flags = X86_RET_STRUCT_2B;
+ break;
+ default:
+ return FFI_BAD_TYPEDEF;
}
+ break;
+ default:
+ return FFI_BAD_TYPEDEF;
+ }
+ cif->flags = flags;
! for (i = 0, n = cif->nargs; i < n; i++)
{
! ffi_type *t = cif->arg_types[i];
!
! bytes = FFI_ALIGN (bytes, t->alignment);
! bytes += FFI_ALIGN (t->size, FFI_SIZEOF_ARG);
}
! cif->bytes = bytes;
! return FFI_OK;
}
! static ffi_arg
! extend_basic_type(void *arg, int type)
{
! switch (type)
{
! case FFI_TYPE_SINT8:
! return *(SINT8 *)arg;
! case FFI_TYPE_UINT8:
! return *(UINT8 *)arg;
! case FFI_TYPE_SINT16:
+ return *(SINT16 *)arg;
+ case FFI_TYPE_UINT16:
+ return *(UINT16 *)arg;
! case FFI_TYPE_SINT32:
! case FFI_TYPE_UINT32:
! case FFI_TYPE_POINTER:
! case FFI_TYPE_FLOAT:
! return *(UINT32 *)arg;
! default:
+ abort();
}
}
! struct call_frame
{
! void *ebp; /* 0 */
! void *retaddr; /* 4 */
! void (*fn)(void); /* 8 */
! int flags; /* 12 */
! void *rvalue; /* 16 */
! unsigned regs[3]; /* 20-28 */
! };
!
! struct abi_params
! {
! int dir; /* parameter growth direction */
! int static_chain; /* the static chain register used by gcc */
! int nregs; /* number of register parameters */
! int regs[3];
! };
!
! static const struct abi_params abi_params[FFI_LAST_ABI] = {
! [FFI_SYSV] = { 1, R_ECX, 0 },
! [FFI_THISCALL] = { 1, R_EAX, 1, { R_ECX } },
! [FFI_FASTCALL] = { 1, R_EAX, 2, { R_ECX, R_EDX } },
! [FFI_STDCALL] = { 1, R_ECX, 0 },
+ [FFI_PASCAL] = { -1, R_ECX, 0 },
+ /* ??? No defined static chain; gcc does not support REGISTER. */
+ [FFI_REGISTER] = { -1, R_ECX, 3, { R_EAX, R_EDX, R_ECX } },
+ [FFI_MS_CDECL] = { 1, R_ECX, 0 }
+ };
+
+ #ifdef HAVE_FASTCALL
+ #ifdef _MSC_VER
+ #define FFI_DECLARE_FASTCALL __fastcall
+ #else
+ #define FFI_DECLARE_FASTCALL __declspec(fastcall)
#endif
+ #else
+ #define FFI_DECLARE_FASTCALL
#endif
! extern void FFI_DECLARE_FASTCALL ffi_call_i386(struct call_frame *, char *) FFI_HIDDEN;
! static void
! ffi_call_int (ffi_cif *cif, void (*fn)(void), void *rvalue,
! void **avalue, void *closure)
{
! size_t rsize, bytes;
! struct call_frame *frame;
! char *stack, *argp;
! ffi_type **arg_types;
! int flags, cabi, i, n, dir, narg_reg;
! const struct abi_params *pabi;
!
+ flags = cif->flags;
+ cabi = cif->abi;
+ pabi = &abi_params[cabi];
+ dir = pabi->dir;
+
+ rsize = 0;
+ if (rvalue == NULL)
{
! switch (flags)
{
! case X86_RET_FLOAT:
! case X86_RET_DOUBLE:
! case X86_RET_LDOUBLE:
! case X86_RET_STRUCTPOP:
! case X86_RET_STRUCTARG:
! /* The float cases need to pop the 387 stack.
! The struct cases need to pass a valid pointer to the callee. */
! rsize = cif->rtype->size;
break;
default:
! /* We can pretend that the callee returns nothing. */
! flags = X86_RET_VOID;
break;
}
}
! bytes = STACK_ALIGN (cif->bytes);
! stack = alloca(bytes + sizeof(*frame) + rsize);
! argp = (dir < 0 ? stack + bytes : stack);
! frame = (struct call_frame *)(stack + bytes);
+ if (rsize)
+ rvalue = frame + 1;
! frame->fn = fn;
! frame->flags = flags;
! frame->rvalue = rvalue;
! frame->regs[pabi->static_chain] = (unsigned)closure;
! narg_reg = 0;
+ switch (flags)
+ {
+ case X86_RET_STRUCTARG:
+ /* The pointer is passed as the first argument. */
+ if (pabi->nregs > 0)
+ {
+ frame->regs[pabi->regs[0]] = (unsigned)rvalue;
+ narg_reg = 1;
+ break;
}
+ /* fallthru */
+ case X86_RET_STRUCTPOP:
+ *(void **)argp = rvalue;
+ argp += sizeof(void *);
+ break;
+ }
! arg_types = cif->arg_types;
! for (i = 0, n = cif->nargs; i < n; i++)
! {
! ffi_type *ty = arg_types[i];
! void *valp = avalue[i];
! size_t z = ty->size;
! int t = ty->type;
! if (z <= FFI_SIZEOF_ARG && t != FFI_TYPE_STRUCT)
{
! ffi_arg val = extend_basic_type (valp, t);
! if (t != FFI_TYPE_FLOAT && narg_reg < pabi->nregs)
! frame->regs[pabi->regs[narg_reg++]] = val;
! else if (dir < 0)
{
! argp -= 4;
+ *(ffi_arg *)argp = val;
}
! else
{
! *(ffi_arg *)argp = val;
+ argp += 4;
+ }
}
else
{
! size_t za = FFI_ALIGN (z, FFI_SIZEOF_ARG);
! size_t align = FFI_SIZEOF_ARG;
!
! /* Issue 434: For thiscall and fastcall, if the paramter passed
! as 64-bit integer or struct, all following integer paramters
! will be passed on stack. */
! if ((cabi == FFI_THISCALL || cabi == FFI_FASTCALL)
! && (t == FFI_TYPE_SINT64
! || t == FFI_TYPE_UINT64
! || t == FFI_TYPE_STRUCT))
! narg_reg = 2;
!
! /* Alignment rules for arguments are quite complex. Vectors and
! structures with 16 byte alignment get it. Note that long double
! on Darwin does have 16 byte alignment, and does not get this
! alignment if passed directly; a structure with a long double
! inside, however, would get 16 byte alignment. Since libffi does
! not support vectors, we need non concern ourselves with other
! cases. */
! if (t == FFI_TYPE_STRUCT && ty->alignment >= 16)
! align = 16;
!
! if (dir < 0)
! {
! /* ??? These reverse argument ABIs are probably too old
! to have cared about alignment. Someone should check. */
! argp -= za;
+ memcpy (argp, valp, z);
}
+ else
+ {
+ argp = (char *)FFI_ALIGN (argp, align);
+ memcpy (argp, valp, z);
+ argp += za;
}
+ }
+ }
+ FFI_ASSERT (dir > 0 || argp == stack);
! ffi_call_i386 (frame, stack);
}
! void
! ffi_call (ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue)
{
! ffi_call_int (cif, fn, rvalue, avalue, NULL);
}
! void
! ffi_call_go (ffi_cif *cif, void (*fn)(void), void *rvalue,
+ void **avalue, void *closure)
{
! ffi_call_int (cif, fn, rvalue, avalue, closure);
}
! /** private members **/
! void FFI_HIDDEN ffi_closure_i386(void);
! void FFI_HIDDEN ffi_closure_STDCALL(void);
! void FFI_HIDDEN ffi_closure_REGISTER(void);
! struct closure_frame
! {
! unsigned rettemp[4]; /* 0 */
! unsigned regs[3]; /* 16-24 */
! ffi_cif *cif; /* 28 */
! void (*fun)(ffi_cif*,void*,void**,void*); /* 32 */
+ void *user_data; /* 36 */
+ };
+
+ int FFI_HIDDEN FFI_DECLARE_FASTCALL
+ ffi_closure_inner (struct closure_frame *frame, char *stack)
+ {
+ ffi_cif *cif = frame->cif;
+ int cabi, i, n, flags, dir, narg_reg;
+ const struct abi_params *pabi;
+ ffi_type **arg_types;
+ char *argp;
+ void *rvalue;
+ void **avalue;
+
+ cabi = cif->abi;
+ flags = cif->flags;
+ narg_reg = 0;
+ rvalue = frame->rettemp;
+ pabi = &abi_params[cabi];
+ dir = pabi->dir;
+ argp = (dir < 0 ? stack + STACK_ALIGN (cif->bytes) : stack);
+
+ switch (flags)
{
! case X86_RET_STRUCTARG:
! if (pabi->nregs > 0)
{
! rvalue = (void *)frame->regs[pabi->regs[0]];
! narg_reg = 1;
+ frame->rettemp[0] = (unsigned)rvalue;
+ break;
}
! /* fallthru */
! case X86_RET_STRUCTPOP:
! rvalue = *(void **)argp;
argp += sizeof(void *);
+ frame->rettemp[0] = (unsigned)rvalue;
+ break;
}
! n = cif->nargs;
! avalue = alloca(sizeof(void *) * n);
!
! arg_types = cif->arg_types;
! for (i = 0; i < n; ++i)
{
! ffi_type *ty = arg_types[i];
! size_t z = ty->size;
! int t = ty->type;
! void *valp;
! if (z <= FFI_SIZEOF_ARG && t != FFI_TYPE_STRUCT)
{
! if (t != FFI_TYPE_FLOAT && narg_reg < pabi->nregs)
! valp = &frame->regs[pabi->regs[narg_reg++]];
+ else if (dir < 0)
{
! argp -= 4;
! valp = argp;
}
+ else
+ {
+ valp = argp;
+ argp += 4;
}
! }
! else
{
! size_t za = FFI_ALIGN (z, FFI_SIZEOF_ARG);
! size_t align = FFI_SIZEOF_ARG;
!
! /* See the comment in ffi_call_int. */
! if (t == FFI_TYPE_STRUCT && ty->alignment >= 16)
! align = 16;
!
! /* Issue 434: For thiscall and fastcall, if the paramter passed
! as 64-bit integer or struct, all following integer paramters
! will be passed on stack. */
! if ((cabi == FFI_THISCALL || cabi == FFI_FASTCALL)
! && (t == FFI_TYPE_SINT64
! || t == FFI_TYPE_UINT64
! || t == FFI_TYPE_STRUCT))
! narg_reg = 2;
!
! if (dir < 0)
{
! /* ??? These reverse argument ABIs are probably too old
! to have cared about alignment. Someone should check. */
+ argp -= za;
+ valp = argp;
}
else
{
! argp = (char *)FFI_ALIGN (argp, align);
! valp = argp;
+ argp += za;
}
}
! avalue[i] = valp;
}
! frame->fun (cif, rvalue, avalue, frame->user_data);
! if (cabi == FFI_STDCALL)
! return flags + (cif->bytes << X86_RET_POP_SHIFT);
! else
! return 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 = closure->tramp;
! void (*dest)(void);
! int op = 0xb8; /* movl imm, %eax */
!
! switch (cif->abi)
{
! case FFI_SYSV:
! case FFI_THISCALL:
! case FFI_FASTCALL:
+ case FFI_MS_CDECL:
+ dest = ffi_closure_i386;
+ break;
+ case FFI_STDCALL:
+ case FFI_PASCAL:
+ dest = ffi_closure_STDCALL;
+ break;
+ case FFI_REGISTER:
+ dest = ffi_closure_REGISTER;
+ op = 0x68; /* pushl imm */
+ break;
+ default:
+ return FFI_BAD_ABI;
}
!
! /* movl or pushl immediate. */
! tramp[0] = op;
! *(void **)(tramp + 1) = codeloc;
!
+ /* jmp dest */
+ tramp[5] = 0xe9;
+ *(unsigned *)(tramp + 6) = (unsigned)dest - ((unsigned)codeloc + 10);
+
+ closure->cif = cif;
+ closure->fun = fun;
+ closure->user_data = user_data;
+
+ return FFI_OK;
}
!
! void FFI_HIDDEN ffi_go_closure_EAX(void);
+ void FFI_HIDDEN ffi_go_closure_ECX(void);
+ void FFI_HIDDEN ffi_go_closure_STDCALL(void);
+
+ ffi_status
+ ffi_prep_go_closure (ffi_go_closure* closure, ffi_cif* cif,
+ void (*fun)(ffi_cif*,void*,void**,void*))
{
! void (*dest)(void);
!
! switch (cif->abi)
{
+ case FFI_SYSV:
+ case FFI_MS_CDECL:
+ dest = ffi_go_closure_ECX;
+ break;
+ case FFI_THISCALL:
+ case FFI_FASTCALL:
+ dest = ffi_go_closure_EAX;
+ break;
+ case FFI_STDCALL:
+ case FFI_PASCAL:
+ dest = ffi_go_closure_STDCALL;
+ break;
+ case FFI_REGISTER:
+ default:
return FFI_BAD_ABI;
}
! closure->tramp = dest;
! closure->cif = cif;
! closure->fun = fun;
return FFI_OK;
}
/* ------- Native raw API support -------------------------------- */
#if !FFI_NO_RAW_API
+ void FFI_HIDDEN ffi_closure_raw_SYSV(void);
+ void FFI_HIDDEN ffi_closure_raw_THISCALL(void);
+
ffi_status
! ffi_prep_raw_closure_loc (ffi_raw_closure *closure,
! ffi_cif *cif,
void (*fun)(ffi_cif*,void*,ffi_raw*,void*),
void *user_data,
void *codeloc)
{
+ char *tramp = closure->tramp;
+ void (*dest)(void);
int i;
! /* We currently don't support certain kinds of arguments for raw
closures. This should be implemented by a separate assembly
language routine, since it would require argument processing,
something we don't do now for performance. */
for (i = cif->nargs-1; i >= 0; i--)
+ switch (cif->arg_types[i]->type)
{
! case FFI_TYPE_STRUCT:
! case FFI_TYPE_LONGDOUBLE:
+ return FFI_BAD_TYPEDEF;
}
! switch (cif->abi)
{
! case FFI_THISCALL:
+ dest = ffi_closure_raw_THISCALL;
+ break;
+ case FFI_SYSV:
+ dest = ffi_closure_raw_SYSV;
+ break;
+ default:
+ return FFI_BAD_ABI;
}
!
! /* movl imm, %eax. */
+ tramp[0] = 0xb8;
+ *(void **)(tramp + 1) = codeloc;
+
+ /* jmp dest */
+ tramp[5] = 0xe9;
+ *(unsigned *)(tramp + 6) = (unsigned)dest - ((unsigned)codeloc + 10);
+
+ closure->cif = cif;
+ closure->fun = fun;
closure->user_data = user_data;
return FFI_OK;
}
! void
! ffi_raw_call(ffi_cif *cif, void (*fn)(void), void *rvalue, ffi_raw *avalue)
{
! size_t rsize, bytes;
! struct call_frame *frame;
+ char *stack, *argp;
+ ffi_type **arg_types;
+ int flags, cabi, i, n, narg_reg;
+ const struct abi_params *pabi;
+
+ flags = cif->flags;
+ cabi = cif->abi;
+ pabi = &abi_params[cabi];
+
+ rsize = 0;
+ if (rvalue == NULL)
+ {
+ switch (flags)
+ {
+ case X86_RET_FLOAT:
+ case X86_RET_DOUBLE:
+ case X86_RET_LDOUBLE:
+ case X86_RET_STRUCTPOP:
+ case X86_RET_STRUCTARG:
+ /* The float cases need to pop the 387 stack.
+ The struct cases need to pass a valid pointer to the callee. */
+ rsize = cif->rtype->size;
+ break;
+ default:
+ /* We can pretend that the callee returns nothing. */
+ flags = X86_RET_VOID;
+ break;
+ }
+ }
! bytes = STACK_ALIGN (cif->bytes);
! argp = stack =
! (void *)((uintptr_t)alloca(bytes + sizeof(*frame) + rsize + 15) & ~16);
! frame = (struct call_frame *)(stack + bytes);
! if (rsize)
! rvalue = frame + 1;
! frame->fn = fn;
! frame->flags = flags;
+ frame->rvalue = rvalue;
! narg_reg = 0;
+ switch (flags)
{
! case X86_RET_STRUCTARG:
! /* The pointer is passed as the first argument. */
! if (pabi->nregs > 0)
! {
! frame->regs[pabi->regs[0]] = (unsigned)rvalue;
! narg_reg = 1;
! break;
}
+ /* fallthru */
+ case X86_RET_STRUCTPOP:
+ *(void **)argp = rvalue;
+ argp += sizeof(void *);
+ bytes -= sizeof(void *);
+ break;
+ }
! arg_types = cif->arg_types;
! for (i = 0, n = cif->nargs; narg_reg < pabi->nregs && i < n; i++)
{
! ffi_type *ty = arg_types[i];
! size_t z = ty->size;
! int t = ty->type;
! if (z <= FFI_SIZEOF_ARG && t != FFI_TYPE_STRUCT && t != FFI_TYPE_FLOAT)
{
! ffi_arg val = extend_basic_type (avalue, t);
+ frame->regs[pabi->regs[narg_reg++]] = val;
+ z = FFI_SIZEOF_ARG;
}
else
{
! memcpy (argp, avalue, z);
! z = FFI_ALIGN (z, FFI_SIZEOF_ARG);
! argp += z;
}
+ avalue += z;
+ bytes -= z;
}
+ if (i < n)
+ memcpy (argp, avalue, bytes);
! ffi_call_i386 (frame, stack);
! }
! #endif /* !FFI_NO_RAW_API */
! #endif /* __i386__ */
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