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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libffi/] [src/] [sh64/] [ffi.c] - Rev 732
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/* ----------------------------------------------------------------------- ffi.c - Copyright (c) 2003, 2004, 2006, 2007 Kaz Kojima Copyright (c) 2008 Anthony Green SuperH SHmedia 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> #include <stdlib.h> #define NGREGARG 8 #define NFREGARG 12 static int return_type (ffi_type *arg) { if (arg->type != FFI_TYPE_STRUCT) return arg->type; /* gcc uses r2 if the result can be packed in on register. */ if (arg->size <= sizeof (UINT8)) return FFI_TYPE_UINT8; else if (arg->size <= sizeof (UINT16)) return FFI_TYPE_UINT16; else if (arg->size <= sizeof (UINT32)) return FFI_TYPE_UINT32; else if (arg->size <= sizeof (UINT64)) return FFI_TYPE_UINT64; return FFI_TYPE_STRUCT; } /* ffi_prep_args is called by the assembly routine once stack space has been allocated for the function's arguments */ void ffi_prep_args(char *stack, extended_cif *ecif) { register unsigned int i; register unsigned int avn; register void **p_argv; register char *argp; register ffi_type **p_arg; argp = stack; if (return_type (ecif->cif->rtype) == FFI_TYPE_STRUCT) { *(void **) argp = ecif->rvalue; argp += sizeof (UINT64); } avn = ecif->cif->nargs; p_argv = ecif->avalue; for (i = 0, p_arg = ecif->cif->arg_types; i < avn; i++, p_arg++, p_argv++) { size_t z; int align; z = (*p_arg)->size; align = (*p_arg)->alignment; if (z < sizeof (UINT32)) { switch ((*p_arg)->type) { case FFI_TYPE_SINT8: *(SINT64 *) argp = (SINT64) *(SINT8 *)(*p_argv); break; case FFI_TYPE_UINT8: *(UINT64 *) argp = (UINT64) *(UINT8 *)(*p_argv); break; case FFI_TYPE_SINT16: *(SINT64 *) argp = (SINT64) *(SINT16 *)(*p_argv); break; case FFI_TYPE_UINT16: *(UINT64 *) argp = (UINT64) *(UINT16 *)(*p_argv); break; case FFI_TYPE_STRUCT: memcpy (argp, *p_argv, z); break; default: FFI_ASSERT(0); } argp += sizeof (UINT64); } else if (z == sizeof (UINT32) && align == sizeof (UINT32)) { switch ((*p_arg)->type) { case FFI_TYPE_INT: case FFI_TYPE_SINT32: *(SINT64 *) argp = (SINT64) *(SINT32 *) (*p_argv); break; case FFI_TYPE_FLOAT: case FFI_TYPE_POINTER: case FFI_TYPE_UINT32: case FFI_TYPE_STRUCT: *(UINT64 *) argp = (UINT64) *(UINT32 *) (*p_argv); break; default: FFI_ASSERT(0); break; } argp += sizeof (UINT64); } else if (z == sizeof (UINT64) && align == sizeof (UINT64) && ((int) *p_argv & (sizeof (UINT64) - 1)) == 0) { *(UINT64 *) argp = *(UINT64 *) (*p_argv); argp += sizeof (UINT64); } else { int n = (z + sizeof (UINT64) - 1) / sizeof (UINT64); memcpy (argp, *p_argv, z); argp += n * sizeof (UINT64); } } return; } /* Perform machine dependent cif processing */ ffi_status ffi_prep_cif_machdep(ffi_cif *cif) { int i, j; int size, type; int n, m; int greg; int freg; int fpair = -1; greg = (return_type (cif->rtype) == FFI_TYPE_STRUCT ? 1 : 0); freg = 0; cif->flags2 = 0; for (i = j = 0; i < cif->nargs; i++) { type = (cif->arg_types)[i]->type; switch (type) { case FFI_TYPE_FLOAT: greg++; cif->bytes += sizeof (UINT64) - sizeof (float); if (freg >= NFREGARG - 1) continue; if (fpair < 0) { fpair = freg; freg += 2; } else fpair = -1; cif->flags2 += ((cif->arg_types)[i]->type) << (2 * j++); break; case FFI_TYPE_DOUBLE: if (greg++ >= NGREGARG && (freg + 1) >= NFREGARG) continue; if ((freg + 1) < NFREGARG) { freg += 2; cif->flags2 += ((cif->arg_types)[i]->type) << (2 * j++); } else cif->flags2 += FFI_TYPE_INT << (2 * j++); break; default: size = (cif->arg_types)[i]->size; if (size < sizeof (UINT64)) cif->bytes += sizeof (UINT64) - size; n = (size + sizeof (UINT64) - 1) / sizeof (UINT64); if (greg >= NGREGARG) continue; else if (greg + n - 1 >= NGREGARG) greg = NGREGARG; else greg += n; for (m = 0; m < n; m++) cif->flags2 += FFI_TYPE_INT << (2 * j++); break; } } /* Set the return type flag */ switch (cif->rtype->type) { case FFI_TYPE_STRUCT: cif->flags = return_type (cif->rtype); break; case FFI_TYPE_VOID: case FFI_TYPE_FLOAT: case FFI_TYPE_DOUBLE: case FFI_TYPE_SINT64: case FFI_TYPE_UINT64: cif->flags = 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, long long, /*@out@*/ unsigned *, void (*fn)(void)); /*@=declundef@*/ /*@=exportheader@*/ void ffi_call(/*@dependent@*/ ffi_cif *cif, void (*fn)(void), /*@out@*/ void *rvalue, /*@dependent@*/ void **avalue) { extended_cif ecif; UINT64 trvalue; 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 (cif->rtype->type == FFI_TYPE_STRUCT && return_type (cif->rtype) != FFI_TYPE_STRUCT) ecif.rvalue = &trvalue; else 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, cif->flags2, ecif.rvalue, fn); break; default: FFI_ASSERT(0); break; } if (rvalue && cif->rtype->type == FFI_TYPE_STRUCT && return_type (cif->rtype) != FFI_TYPE_STRUCT) memcpy (rvalue, &trvalue, cif->rtype->size); } extern void ffi_closure_SYSV (void); extern void __ic_invalidate (void *line); 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 int *tramp; FFI_ASSERT (cif->abi == FFI_GCC_SYSV); tramp = (unsigned int *) &closure->tramp[0]; /* Since ffi_closure is an aligned object, the ffi trampoline is called as an SHcompact code. Sigh. SHcompact part: mova @(1,pc),r0; add #1,r0; jmp @r0; nop; SHmedia part: movi fnaddr >> 16,r1; shori fnaddr,r1; ptabs/l r1,tr0 movi cxt >> 16,r1; shori cxt,r1; blink tr0,r63 */ #ifdef __LITTLE_ENDIAN__ tramp[0] = 0x7001c701; tramp[1] = 0x0009402b; #else tramp[0] = 0xc7017001; tramp[1] = 0x402b0009; #endif tramp[2] = 0xcc000010 | (((UINT32) ffi_closure_SYSV) >> 16) << 10; tramp[3] = 0xc8000010 | (((UINT32) ffi_closure_SYSV) & 0xffff) << 10; tramp[4] = 0x6bf10600; tramp[5] = 0xcc000010 | (((UINT32) codeloc) >> 16) << 10; tramp[6] = 0xc8000010 | (((UINT32) codeloc) & 0xffff) << 10; tramp[7] = 0x4401fff0; closure->cif = cif; closure->fun = fun; closure->user_data = user_data; /* Flush the icache. */ asm volatile ("ocbwb %0,0; synco; icbi %1,0; synci" : : "r" (tramp), "r"(codeloc)); return FFI_OK; } /* Basically the trampoline invokes ffi_closure_SYSV, and on * entry, r3 holds the address of the closure. * After storing the registers that could possibly contain * parameters to be passed into the stack frame and setting * up space for a return value, ffi_closure_SYSV invokes the * following helper function to do most of the work. */ int ffi_closure_helper_SYSV (ffi_closure *closure, UINT64 *rvalue, UINT64 *pgr, UINT64 *pfr, UINT64 *pst) { void **avalue; ffi_type **p_arg; int i, avn; int greg, freg; ffi_cif *cif; int fpair = -1; cif = closure->cif; avalue = alloca (cif->nargs * sizeof (void *)); /* Copy the caller's structure return value address so that the closure returns the data directly to the caller. */ if (return_type (cif->rtype) == FFI_TYPE_STRUCT) { rvalue = (UINT64 *) *pgr; greg = 1; } else greg = 0; freg = 0; cif = closure->cif; avn = cif->nargs; /* Grab the addresses of the arguments from the stack frame. */ for (i = 0, p_arg = cif->arg_types; i < avn; i++, p_arg++) { size_t z; void *p; z = (*p_arg)->size; if (z < sizeof (UINT32)) { p = pgr + greg++; switch ((*p_arg)->type) { case FFI_TYPE_SINT8: case FFI_TYPE_UINT8: case FFI_TYPE_SINT16: case FFI_TYPE_UINT16: case FFI_TYPE_STRUCT: #ifdef __LITTLE_ENDIAN__ avalue[i] = p; #else avalue[i] = ((char *) p) + sizeof (UINT32) - z; #endif break; default: FFI_ASSERT(0); } } else if (z == sizeof (UINT32)) { if ((*p_arg)->type == FFI_TYPE_FLOAT) { if (freg < NFREGARG - 1) { if (fpair >= 0) { avalue[i] = (UINT32 *) pfr + fpair; fpair = -1; } else { #ifdef __LITTLE_ENDIAN__ fpair = freg; avalue[i] = (UINT32 *) pfr + (1 ^ freg); #else fpair = 1 ^ freg; avalue[i] = (UINT32 *) pfr + freg; #endif freg += 2; } } else #ifdef __LITTLE_ENDIAN__ avalue[i] = pgr + greg; #else avalue[i] = (UINT32 *) (pgr + greg) + 1; #endif } else #ifdef __LITTLE_ENDIAN__ avalue[i] = pgr + greg; #else avalue[i] = (UINT32 *) (pgr + greg) + 1; #endif greg++; } else if ((*p_arg)->type == FFI_TYPE_DOUBLE) { if (freg + 1 >= NFREGARG) avalue[i] = pgr + greg; else { avalue[i] = pfr + (freg >> 1); freg += 2; } greg++; } else { int n = (z + sizeof (UINT64) - 1) / sizeof (UINT64); avalue[i] = pgr + greg; greg += n; } } (closure->fun) (cif, rvalue, avalue, closure->user_data); /* Tell ffi_closure_SYSV how to perform return type promotions. */ return return_type (cif->rtype); }