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[/] [openrisc/] [tags/] [gnu-dev/] [fsf-gcc-snapshot-1-mar-12/] [or1k-gcc/] [libffi/] [src/] [prep_cif.c] - Rev 783
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/* ----------------------------------------------------------------------- prep_cif.c - Copyright (c) 1996, 1998, 2007 Red Hat, Inc. 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> #include <stdlib.h> /* Round up to FFI_SIZEOF_ARG. */ #define STACK_ARG_SIZE(x) ALIGN(x, FFI_SIZEOF_ARG) /* Perform machine independent initialization of aggregate type specifications. */ static ffi_status initialize_aggregate(ffi_type *arg) { ffi_type **ptr; FFI_ASSERT(arg != NULL); FFI_ASSERT(arg->elements != NULL); FFI_ASSERT(arg->size == 0); FFI_ASSERT(arg->alignment == 0); ptr = &(arg->elements[0]); while ((*ptr) != NULL) { if (((*ptr)->size == 0) && (initialize_aggregate((*ptr)) != FFI_OK)) return FFI_BAD_TYPEDEF; /* Perform a sanity check on the argument type */ FFI_ASSERT_VALID_TYPE(*ptr); arg->size = ALIGN(arg->size, (*ptr)->alignment); arg->size += (*ptr)->size; arg->alignment = (arg->alignment > (*ptr)->alignment) ? arg->alignment : (*ptr)->alignment; ptr++; } /* Structure size includes tail padding. This is important for structures that fit in one register on ABIs like the PowerPC64 Linux ABI that right justify small structs in a register. It's also needed for nested structure layout, for example struct A { long a; char b; }; struct B { struct A x; char y; }; should find y at an offset of 2*sizeof(long) and result in a total size of 3*sizeof(long). */ arg->size = ALIGN (arg->size, arg->alignment); if (arg->size == 0) return FFI_BAD_TYPEDEF; else return FFI_OK; } #ifndef __CRIS__ /* The CRIS ABI specifies structure elements to have byte alignment only, so it completely overrides this functions, which assumes "natural" alignment and padding. */ /* Perform machine independent ffi_cif preparation, then call machine dependent routine. */ ffi_status ffi_prep_cif(ffi_cif *cif, ffi_abi abi, unsigned int nargs, ffi_type *rtype, ffi_type **atypes) { unsigned bytes = 0; unsigned int i; ffi_type **ptr; FFI_ASSERT(cif != NULL); #ifndef X86_WIN32 FFI_ASSERT((abi > FFI_FIRST_ABI) && (abi <= FFI_DEFAULT_ABI)); #else FFI_ASSERT(abi > FFI_FIRST_ABI && abi <= FFI_DEFAULT_ABI || abi == FFI_THISCALL); #endif cif->abi = abi; cif->arg_types = atypes; cif->nargs = nargs; cif->rtype = rtype; cif->flags = 0; /* Initialize the return type if necessary */ if ((cif->rtype->size == 0) && (initialize_aggregate(cif->rtype) != FFI_OK)) return FFI_BAD_TYPEDEF; /* Perform a sanity check on the return type */ FFI_ASSERT_VALID_TYPE(cif->rtype); /* x86, x86-64 and s390 stack space allocation is handled in prep_machdep. */ #if !defined M68K && !defined __i386__ && !defined __x86_64__ && !defined S390 && !defined PA /* Make space for the return structure pointer */ if (cif->rtype->type == FFI_TYPE_STRUCT #ifdef SPARC && (cif->abi != FFI_V9 || cif->rtype->size > 32) #endif ) bytes = STACK_ARG_SIZE(sizeof(void*)); #endif for (ptr = cif->arg_types, i = cif->nargs; i > 0; i--, ptr++) { /* Initialize any uninitialized aggregate type definitions */ if (((*ptr)->size == 0) && (initialize_aggregate((*ptr)) != FFI_OK)) return FFI_BAD_TYPEDEF; /* Perform a sanity check on the argument type, do this check after the initialization. */ FFI_ASSERT_VALID_TYPE(*ptr); #if !defined __i386__ && !defined __x86_64__ && !defined S390 && !defined PA #ifdef SPARC if (((*ptr)->type == FFI_TYPE_STRUCT && ((*ptr)->size > 16 || cif->abi != FFI_V9)) || ((*ptr)->type == FFI_TYPE_LONGDOUBLE && cif->abi != FFI_V9)) bytes += sizeof(void*); else #endif { /* Add any padding if necessary */ if (((*ptr)->alignment - 1) & bytes) bytes = ALIGN(bytes, (*ptr)->alignment); bytes += STACK_ARG_SIZE((*ptr)->size); } #endif } cif->bytes = bytes; /* Perform machine dependent cif processing */ return ffi_prep_cif_machdep(cif); } #endif /* not __CRIS__ */ #if FFI_CLOSURES ffi_status ffi_prep_closure (ffi_closure* closure, ffi_cif* cif, void (*fun)(ffi_cif*,void*,void**,void*), void *user_data) { return ffi_prep_closure_loc (closure, cif, fun, user_data, closure); } #endif