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Diffstat (limited to 'libffi.old/src/arm/ffi.c')
| -rw-r--r-- | libffi.old/src/arm/ffi.c | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/libffi.old/src/arm/ffi.c b/libffi.old/src/arm/ffi.c new file mode 100644 index 0000000..37e3838 --- /dev/null +++ b/libffi.old/src/arm/ffi.c @@ -0,0 +1,175 @@ +/* ----------------------------------------------------------------------- + ffi.c - Copyright (c) 1998 Red Hat, Inc. + + ARM 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. + ----------------------------------------------------------------------- */ + +#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->rtype->type == FFI_TYPE_STRUCT ) { + *(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 (((*p_arg)->alignment - 1) & (unsigned) argp) { + argp = (char *) ALIGN(argp, (*p_arg)->alignment); + } + + 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_STRUCT: + *(unsigned int *) argp = (unsigned int)*(UINT32 *)(* p_argv); + break; + + default: + FFI_ASSERT(0); + } + } + else if (z == sizeof(int)) + { + *(unsigned int *) argp = (unsigned int)*(UINT32 *)(* p_argv); + } + 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: + case FFI_TYPE_STRUCT: + case FFI_TYPE_FLOAT: + case FFI_TYPE_DOUBLE: + cif->flags = (unsigned) cif->rtype->type; + break; + + default: + cif->flags = FFI_TYPE_INT; + break; + } + + 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@*/ + +void ffi_call(/*@dependent@*/ ffi_cif *cif, + void (*fn)(), + /*@out@*/ void *rvalue, + /*@dependent@*/ 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)) + { + /*@-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, &ecif, cif->bytes, + cif->flags, ecif.rvalue, fn); + /*@=usedef@*/ + break; + default: + FFI_ASSERT(0); + break; + } +} |