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Diffstat (limited to 'libffi.old/src/x86/ffi_darwin.c')
-rw-r--r--libffi.old/src/x86/ffi_darwin.c584
1 files changed, 584 insertions, 0 deletions
diff --git a/libffi.old/src/x86/ffi_darwin.c b/libffi.old/src/x86/ffi_darwin.c
new file mode 100644
index 0000000..bf79c56
--- /dev/null
+++ b/libffi.old/src/x86/ffi_darwin.c
@@ -0,0 +1,584 @@
+#ifdef __i386__
+/* -----------------------------------------------------------------------
+ ffi.c - Copyright (c) 1996, 1998, 1999, 2001 Red Hat, Inc.
+ Copyright (c) 2002 Ranjit Mathew
+ Copyright (c) 2002 Bo Thorsen
+ Copyright (c) 2002 Roger Sayle
+
+ x86 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 CYGNUS SOLUTIONS 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 __x86_64__
+
+#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 */
+
+/*@-exportheader@*/
+void ffi_prep_args(char *stack, extended_cif *ecif)
+/*@=exportheader@*/
+{
+ register unsigned int i;
+ register void **p_argv;
+ register char *argp;
+ register ffi_type **p_arg;
+
+ argp = stack;
+
+ if (ecif->cif->flags == FFI_TYPE_STRUCT && ecif->cif->rtype->size > 8)
+ {
+ *(void **) argp = ecif->rvalue;
+ argp += 4;
+ }
+
+ p_argv = ecif->avalue;
+
+ for (i = ecif->cif->nargs, p_arg = ecif->cif->arg_types;
+ i != 0;
+ i--, p_arg++)
+ {
+ size_t z;
+
+ /* Align if necessary */
+ if ((sizeof(int) - 1) & (unsigned) argp)
+ argp = (char *) ALIGN(argp, sizeof(int));
+
+ z = (*p_arg)->size;
+ if (z < sizeof(int))
+ {
+ 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_SINT32:
+ *(signed int *) argp = (signed int)*(SINT32 *)(* p_argv);
+ break;
+
+ case FFI_TYPE_UINT32:
+ *(unsigned int *) argp = (unsigned int)*(UINT32 *)(* p_argv);
+ break;
+
+ case FFI_TYPE_STRUCT:
+ *(unsigned int *) argp = (unsigned int)*(UINT32 *)(* p_argv);
+ break;
+
+ default:
+ FFI_ASSERT(0);
+ }
+ }
+ else
+ {
+ memcpy(argp, *p_argv, z);
+ }
+ p_argv++;
+ argp += z;
+ }
+
+ return;
+}
+
+/* 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:
+#if !defined(X86_WIN32)
+ case FFI_TYPE_STRUCT:
+#endif
+ case FFI_TYPE_SINT64:
+ case FFI_TYPE_FLOAT:
+ case FFI_TYPE_DOUBLE:
+ case FFI_TYPE_LONGDOUBLE:
+ cif->flags = (unsigned) cif->rtype->type;
+ break;
+
+ case FFI_TYPE_UINT64:
+ cif->flags = FFI_TYPE_SINT64;
+ break;
+
+#if defined X86_WIN32
+
+ case FFI_TYPE_STRUCT:
+ if (cif->rtype->size == 1)
+ {
+ cif->flags = FFI_TYPE_SINT8; /* same as char size */
+ }
+ else if (cif->rtype->size == 2)
+ {
+ cif->flags = FFI_TYPE_SINT16; /* same as short size */
+ }
+ else if (cif->rtype->size == 4)
+ {
+ cif->flags = FFI_TYPE_INT; /* same as int type */
+ }
+ else if (cif->rtype->size == 8)
+ {
+ cif->flags = FFI_TYPE_SINT64; /* same as int64 type */
+ }
+ else
+ {
+ cif->flags = FFI_TYPE_STRUCT;
+ }
+ break;
+#endif
+
+ default:
+ cif->flags = FFI_TYPE_INT;
+ break;
+ }
+
+ /* Darwin: The stack needs to be aligned to a multiple of 16 bytes */
+ cif->bytes = (cif->bytes + 15) & ~0xF;
+
+ return FFI_OK;
+}
+
+/*@-declundef@*/
+/*@-exportheader@*/
+extern void ffi_call_SYSV(void (*)(char *, extended_cif *),
+ /*@out@*/ extended_cif *,
+ unsigned, unsigned,
+ /*@out@*/ unsigned *,
+ void (*fn)());
+/*@=declundef@*/
+/*@=exportheader@*/
+
+#ifdef X86_WIN32
+/*@-declundef@*/
+/*@-exportheader@*/
+extern void ffi_call_STDCALL(void (*)(char *, extended_cif *),
+ /*@out@*/ extended_cif *,
+ unsigned, unsigned,
+ /*@out@*/ unsigned *,
+ void (*fn)());
+/*@=declundef@*/
+/*@=exportheader@*/
+#endif /* X86_WIN32 */
+
+void ffi_call(/*@dependent@*/ ffi_cif *cif,
+ void (*fn)(),
+ /*@out@*/ void *rvalue,
+ /*@dependent@*/ void **avalue)
+{
+ extended_cif ecif;
+ int flags;
+
+ 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->rtype->size > 8))
+ {
+ /*@-sysunrecog@*/
+ ecif.rvalue = alloca(cif->rtype->size);
+ /*@=sysunrecog@*/
+ }
+ else
+ ecif.rvalue = rvalue;
+
+ flags = cif->flags;
+ if (flags == FFI_TYPE_STRUCT) {
+ if (cif->rtype->size == 8) {
+ flags = FFI_TYPE_SINT64;
+ } else if (cif->rtype->size < 8) {
+ flags = FFI_TYPE_INT;
+ }
+ }
+
+
+ switch (cif->abi)
+ {
+ case FFI_SYSV:
+ /*@-usedef@*/
+ ffi_call_SYSV(ffi_prep_args, &ecif, cif->bytes,
+ flags, ecif.rvalue, fn);
+ /*@=usedef@*/
+ break;
+#ifdef X86_WIN32
+ case FFI_STDCALL:
+ /*@-usedef@*/
+ ffi_call_STDCALL(ffi_prep_args, &ecif, cif->bytes,
+ cif->flags, ecif.rvalue, fn);
+ /*@=usedef@*/
+ break;
+#endif /* X86_WIN32 */
+ default:
+ FFI_ASSERT(0);
+ break;
+ }
+}
+
+
+/** private members **/
+
+static void ffi_prep_incoming_args_SYSV (char *stack, void **ret,
+ void** args, ffi_cif* cif);
+static void ffi_closure_SYSV (ffi_closure *)
+ __attribute__ ((regparm(1)));
+#if !FFI_NO_RAW_API
+static void ffi_closure_raw_SYSV (ffi_raw_closure *)
+ __attribute__ ((regparm(1)));
+#endif
+
+/* This function is jumped to by the trampoline */
+
+static void
+ffi_closure_SYSV (closure)
+ ffi_closure *closure;
+{
+ // this is our return value storage
+ long double res;
+
+ // our various things...
+ ffi_cif *cif;
+ void **arg_area;
+ unsigned short rtype;
+ void *resp = (void*)&res;
+ void *args = __builtin_dwarf_cfa ();
+
+ 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 re-set RESP to point to the
+ * structure return address. */
+
+ ffi_prep_incoming_args_SYSV(args, (void**)&resp, arg_area, cif);
+
+ (closure->fun) (cif, resp, arg_area, closure->user_data);
+
+ rtype = cif->flags;
+
+ if (rtype == FFI_TYPE_STRUCT && cif->rtype->size <= 8) {
+ if (cif->rtype->size == 8) {
+ rtype = FFI_TYPE_SINT64;
+ } else {
+ rtype = FFI_TYPE_INT;
+ }
+ }
+
+ /* now, do a generic return based on the value of rtype */
+ if (rtype == FFI_TYPE_INT)
+ {
+ asm ("movl (%0),%%eax" : : "r" (resp) : "eax");
+ }
+ else if (rtype == FFI_TYPE_FLOAT)
+ {
+ asm ("flds (%0)" : : "r" (resp) : "st" );
+ }
+ else if (rtype == FFI_TYPE_DOUBLE)
+ {
+ asm ("fldl (%0)" : : "r" (resp) : "st", "st(1)" );
+ }
+ else if (rtype == FFI_TYPE_LONGDOUBLE)
+ {
+ asm ("fldt (%0)" : : "r" (resp) : "st", "st(1)" );
+ }
+ else if (rtype == FFI_TYPE_SINT64)
+ {
+ asm ("movl 0(%0),%%eax;"
+ "movl 4(%0),%%edx"
+ : : "r"(resp)
+ : "eax", "edx");
+ }
+#ifdef X86_WIN32
+ else if (rtype == FFI_TYPE_SINT8) /* 1-byte struct */
+ {
+ asm ("movsbl (%0),%%eax" : : "r" (resp) : "eax");
+ }
+ else if (rtype == FFI_TYPE_SINT16) /* 2-bytes struct */
+ {
+ asm ("movswl (%0),%%eax" : : "r" (resp) : "eax");
+ }
+#endif
+}
+
+/*@-exportheader@*/
+static void
+ffi_prep_incoming_args_SYSV(char *stack, void **rvalue,
+ void **avalue, ffi_cif *cif)
+/*@=exportheader@*/
+{
+ register unsigned int i;
+ register void **p_argv;
+ register char *argp;
+ register ffi_type **p_arg;
+
+ argp = stack;
+
+ if ( cif->flags == FFI_TYPE_STRUCT && (cif->rtype->size > 8)) {
+ *rvalue = *(void **) argp;
+ argp += 4;
+ }
+
+ p_argv = avalue;
+
+ for (i = cif->nargs, p_arg = cif->arg_types; (i != 0); i--, p_arg++)
+ {
+ size_t z;
+
+ /* Align if necessary */
+ if ((sizeof(int) - 1) & (unsigned) argp) {
+ argp = (char *) ALIGN(argp, sizeof(int));
+ }
+
+ z = (*p_arg)->size;
+
+ /* because we're little endian, this is what it turns into. */
+
+ *p_argv = (void*) argp;
+
+ p_argv++;
+ argp += z;
+ }
+
+ return;
+}
+
+/* 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 - ((unsigned int) __tramp + FFI_TRAMPOLINE_SIZE); \
+ *(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 */ \
+ })
+
+
+/* the cif must already be prep'ed */
+
+ffi_status
+ffi_prep_closure (ffi_closure* closure,
+ ffi_cif* cif,
+ void (*fun)(ffi_cif*,void*,void**,void*),
+ void *user_data)
+{
+ FFI_ASSERT (cif->abi == FFI_SYSV);
+
+ FFI_INIT_TRAMPOLINE (&closure->tramp[0], \
+ &ffi_closure_SYSV, \
+ (void*)closure);
+
+ closure->cif = cif;
+ closure->user_data = user_data;
+ closure->fun = fun;
+
+ return FFI_OK;
+}
+
+/* ------- Native raw API support -------------------------------- */
+
+#if !FFI_NO_RAW_API
+
+static void
+ffi_closure_raw_SYSV (closure)
+ ffi_raw_closure *closure;
+{
+ // this is our return value storage
+ long double res;
+
+ // our various things...
+ ffi_raw *raw_args;
+ ffi_cif *cif;
+ unsigned short rtype;
+ void *resp = (void*)&res;
+
+ /* get the cif */
+ cif = closure->cif;
+
+ /* the SYSV/X86 abi matches the RAW API exactly, well.. almost */
+ raw_args = (ffi_raw*) __builtin_dwarf_cfa ();
+
+ (closure->fun) (cif, resp, raw_args, closure->user_data);
+
+ rtype = cif->flags;
+
+ /* now, do a generic return based on the value of rtype */
+ if (rtype == FFI_TYPE_INT)
+ {
+ asm ("movl (%0),%%eax" : : "r" (resp) : "eax");
+ }
+ else if (rtype == FFI_TYPE_FLOAT)
+ {
+ asm ("flds (%0)" : : "r" (resp) : "st" );
+ }
+ else if (rtype == FFI_TYPE_DOUBLE)
+ {
+ asm ("fldl (%0)" : : "r" (resp) : "st", "st(1)" );
+ }
+ else if (rtype == FFI_TYPE_LONGDOUBLE)
+ {
+ asm ("fldt (%0)" : : "r" (resp) : "st", "st(1)" );
+ }
+ else if (rtype == FFI_TYPE_SINT64)
+ {
+ asm ("movl 0(%0),%%eax; movl 4(%0),%%edx"
+ : : "r"(resp)
+ : "eax", "edx");
+ }
+}
+
+
+
+
+ffi_status
+ffi_prep_raw_closure (ffi_raw_closure* closure,
+ ffi_cif* cif,
+ void (*fun)(ffi_cif*,void*,ffi_raw*,void*),
+ void *user_data)
+{
+ int i;
+
+ FFI_ASSERT (cif->abi == FFI_SYSV);
+
+ // 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);
+ }
+
+
+ FFI_INIT_TRAMPOLINE (&closure->tramp[0], &ffi_closure_raw_SYSV,
+ (void*)closure);
+
+ closure->cif = cif;
+ closure->user_data = user_data;
+ closure->fun = fun;
+
+ return FFI_OK;
+}
+
+static void
+ffi_prep_args_raw(char *stack, extended_cif *ecif)
+{
+ memcpy (stack, ecif->avalue, ecif->cif->bytes);
+}
+
+/* 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.)
+ */
+
+extern void
+ffi_call_SYSV(void (*)(char *, extended_cif *),
+ /*@out@*/ extended_cif *,
+ unsigned, unsigned,
+ /*@out@*/ unsigned *,
+ void (*fn)());
+
+#ifdef X86_WIN32
+extern void
+ffi_call_STDCALL(void (*)(char *, extended_cif *),
+ /*@out@*/ extended_cif *,
+ unsigned, unsigned,
+ /*@out@*/ unsigned *,
+ void (*fn)());
+#endif /* X86_WIN32 */
+
+void
+ffi_raw_call(/*@dependent@*/ ffi_cif *cif,
+ void (*fn)(),
+ /*@out@*/ void *rvalue,
+ /*@dependent@*/ 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->rtype->type == FFI_TYPE_STRUCT) && (cif->rtype->size > 8))
+ {
+ /*@-sysunrecog@*/
+ ecif.rvalue = alloca(cif->rtype->size);
+ /*@=sysunrecog@*/
+ }
+ else
+ ecif.rvalue = rvalue;
+
+
+ switch (cif->abi)
+ {
+ case FFI_SYSV:
+ /*@-usedef@*/
+ ffi_call_SYSV(ffi_prep_args_raw, &ecif, cif->bytes,
+ cif->flags, ecif.rvalue, fn);
+ /*@=usedef@*/
+ break;
+#ifdef X86_WIN32
+ case FFI_STDCALL:
+ /*@-usedef@*/
+ ffi_call_STDCALL(ffi_prep_args_raw, &ecif, cif->bytes,
+ cif->flags, ecif.rvalue, fn);
+ /*@=usedef@*/
+ break;
+#endif /* X86_WIN32 */
+ default:
+ FFI_ASSERT(0);
+ break;
+ }
+}
+
+#endif
+
+#endif /* __x86_64__ */
+
+#endif /* __i386__ */
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