From 17a4d31014692f959a2a73f4107f34d6f6763423 Mon Sep 17 00:00:00 2001 From: Matthias Benkard Date: Tue, 4 Mar 2008 11:35:21 +0100 Subject: Remove the obsolete libffi version from the tree. darcs-hash:d03cd1c65ed7114fa601e49a8d189e835479e93f --- libffi.old/src/powerpc/ffi.c | 1133 ------------------------------------------ 1 file changed, 1133 deletions(-) delete mode 100644 libffi.old/src/powerpc/ffi.c (limited to 'libffi.old/src/powerpc/ffi.c') diff --git a/libffi.old/src/powerpc/ffi.c b/libffi.old/src/powerpc/ffi.c deleted file mode 100644 index 29f7dba..0000000 --- a/libffi.old/src/powerpc/ffi.c +++ /dev/null @@ -1,1133 +0,0 @@ -/* ----------------------------------------------------------------------- - ffi.c - Copyright (c) 1998 Geoffrey Keating - - PowerPC Foreign Function Interface - - $Id: ffi.c,v 1.1.1.1 1998/11/29 16:48:16 green Exp $ - - 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 AUTHOR 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 -#include - -#include -#include - -#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 1) -# define hidden __attribute__ ((visibility ("hidden"))) -#else -# define hidden -#endif - - -extern void ffi_closure_SYSV(void); -extern void hidden ffi_closure_LINUX64(void); - -enum { - /* The assembly depends on these exact flags. */ - FLAG_RETURNS_NOTHING = 1 << (31-30), /* These go in cr7 */ - FLAG_RETURNS_FP = 1 << (31-29), - FLAG_RETURNS_64BITS = 1 << (31-28), - - FLAG_ARG_NEEDS_COPY = 1 << (31- 7), - FLAG_FP_ARGUMENTS = 1 << (31- 6), /* cr1.eq; specified by ABI */ - FLAG_4_GPR_ARGUMENTS = 1 << (31- 5), - FLAG_RETVAL_REFERENCE = 1 << (31- 4) -}; - -/* About the SYSV ABI. */ -enum { - NUM_GPR_ARG_REGISTERS = 8, - NUM_FPR_ARG_REGISTERS = 8 -}; -enum { ASM_NEEDS_REGISTERS = 4 }; - -/* ffi_prep_args_SYSV is called by the assembly routine once stack space - has been allocated for the function's arguments. - - The stack layout we want looks like this: - - | Return address from ffi_call_SYSV 4bytes | higher addresses - |--------------------------------------------| - | Previous backchain pointer 4 | stack pointer here - |--------------------------------------------|<+ <<< on entry to - | Saved r28-r31 4*4 | | ffi_call_SYSV - |--------------------------------------------| | - | GPR registers r3-r10 8*4 | | ffi_call_SYSV - |--------------------------------------------| | - | FPR registers f1-f8 (optional) 8*8 | | - |--------------------------------------------| | stack | - | Space for copied structures | | grows | - |--------------------------------------------| | down V - | Parameters that didn't fit in registers | | - |--------------------------------------------| | lower addresses - | Space for callee's LR 4 | | - |--------------------------------------------| | stack pointer here - | Current backchain pointer 4 |-/ during - |--------------------------------------------| <<< ffi_call_SYSV - - */ - -/*@-exportheader@*/ -void ffi_prep_args_SYSV(extended_cif *ecif, unsigned *const stack) -/*@=exportheader@*/ -{ - const unsigned bytes = ecif->cif->bytes; - const unsigned flags = ecif->cif->flags; - - /* 'stacktop' points at the previous backchain pointer. */ - unsigned *const stacktop = stack + (bytes / sizeof(unsigned)); - - /* 'gpr_base' points at the space for gpr3, and grows upwards as - we use GPR registers. */ - unsigned *gpr_base = stacktop - ASM_NEEDS_REGISTERS - NUM_GPR_ARG_REGISTERS; - int intarg_count = 0; - - /* 'fpr_base' points at the space for fpr1, and grows upwards as - we use FPR registers. */ - double *fpr_base = (double *)gpr_base - NUM_FPR_ARG_REGISTERS; - int fparg_count = 0; - - /* 'copy_space' grows down as we put structures in it. It should - stay 16-byte aligned. */ - char *copy_space = ((flags & FLAG_FP_ARGUMENTS) - ? (char *)fpr_base - : (char *)gpr_base); - - /* 'next_arg' grows up as we put parameters in it. */ - unsigned *next_arg = stack + 2; - - int i; - ffi_type **ptr; - double double_tmp; - void **p_argv; - size_t struct_copy_size; - unsigned gprvalue; - - /* Check that everything starts aligned properly. */ - FFI_ASSERT(((unsigned)(char *)stack & 0xF) == 0); - FFI_ASSERT(((unsigned)(char *)copy_space & 0xF) == 0); - FFI_ASSERT(((unsigned)(char *)stacktop & 0xF) == 0); - FFI_ASSERT((bytes & 0xF) == 0); - FFI_ASSERT(copy_space >= (char *)next_arg); - - /* Deal with return values that are actually pass-by-reference. */ - if (flags & FLAG_RETVAL_REFERENCE) - { - *gpr_base++ = (unsigned long)(char *)ecif->rvalue; - intarg_count++; - } - - /* Now for the arguments. */ - p_argv = ecif->avalue; - for (ptr = ecif->cif->arg_types, i = ecif->cif->nargs; - i > 0; - i--, ptr++, p_argv++) - { - switch ((*ptr)->type) - { - case FFI_TYPE_FLOAT: - double_tmp = *(float *)*p_argv; - if (fparg_count >= NUM_FPR_ARG_REGISTERS) - { - *(float *)next_arg = (float)double_tmp; - next_arg += 1; - } - else - *fpr_base++ = double_tmp; - fparg_count++; - FFI_ASSERT(flags & FLAG_FP_ARGUMENTS); - break; - - case FFI_TYPE_DOUBLE: - double_tmp = *(double *)*p_argv; - - if (fparg_count >= NUM_FPR_ARG_REGISTERS) - { - if (intarg_count%2 != 0) - { - intarg_count++; - next_arg++; - } - *(double *)next_arg = double_tmp; - next_arg += 2; - } - else - *fpr_base++ = double_tmp; - fparg_count++; - FFI_ASSERT(flags & FLAG_FP_ARGUMENTS); - break; - - case FFI_TYPE_UINT64: - case FFI_TYPE_SINT64: - if (intarg_count == NUM_GPR_ARG_REGISTERS-1) - intarg_count++; - if (intarg_count >= NUM_GPR_ARG_REGISTERS) - { - if (intarg_count%2 != 0) - { - intarg_count++; - next_arg++; - } - *(long long *)next_arg = *(long long *)*p_argv; - next_arg += 2; - } - else - { - /* whoops: abi states only certain register pairs - * can be used for passing long long int - * specifically (r3,r4), (r5,r6), (r7,r8), - * (r9,r10) and if next arg is long long but - * not correct starting register of pair then skip - * until the proper starting register - */ - if (intarg_count%2 != 0) - { - intarg_count ++; - gpr_base++; - } - *(long long *)gpr_base = *(long long *)*p_argv; - gpr_base += 2; - } - intarg_count += 2; - break; - - case FFI_TYPE_STRUCT: -#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE - case FFI_TYPE_LONGDOUBLE: -#endif - struct_copy_size = ((*ptr)->size + 15) & ~0xF; - copy_space -= struct_copy_size; - memcpy(copy_space, (char *)*p_argv, (*ptr)->size); - - gprvalue = (unsigned long)copy_space; - - FFI_ASSERT(copy_space > (char *)next_arg); - FFI_ASSERT(flags & FLAG_ARG_NEEDS_COPY); - goto putgpr; - - case FFI_TYPE_UINT8: - gprvalue = *(unsigned char *)*p_argv; - goto putgpr; - case FFI_TYPE_SINT8: - gprvalue = *(signed char *)*p_argv; - goto putgpr; - case FFI_TYPE_UINT16: - gprvalue = *(unsigned short *)*p_argv; - goto putgpr; - case FFI_TYPE_SINT16: - gprvalue = *(signed short *)*p_argv; - goto putgpr; - - case FFI_TYPE_INT: - case FFI_TYPE_UINT32: - case FFI_TYPE_SINT32: - case FFI_TYPE_POINTER: - gprvalue = *(unsigned *)*p_argv; - putgpr: - if (intarg_count >= NUM_GPR_ARG_REGISTERS) - *next_arg++ = gprvalue; - else - *gpr_base++ = gprvalue; - intarg_count++; - break; - } - } - - /* Check that we didn't overrun the stack... */ - FFI_ASSERT(copy_space >= (char *)next_arg); - FFI_ASSERT(gpr_base <= stacktop - ASM_NEEDS_REGISTERS); - FFI_ASSERT((unsigned *)fpr_base - <= stacktop - ASM_NEEDS_REGISTERS - NUM_GPR_ARG_REGISTERS); - FFI_ASSERT(flags & FLAG_4_GPR_ARGUMENTS || intarg_count <= 4); -} - -/* About the LINUX64 ABI. */ -enum { - NUM_GPR_ARG_REGISTERS64 = 8, - NUM_FPR_ARG_REGISTERS64 = 13 -}; -enum { ASM_NEEDS_REGISTERS64 = 4 }; - -/* ffi_prep_args64 is called by the assembly routine once stack space - has been allocated for the function's arguments. - - The stack layout we want looks like this: - - | Ret addr from ffi_call_LINUX64 8bytes | higher addresses - |--------------------------------------------| - | CR save area 8bytes | - |--------------------------------------------| - | Previous backchain pointer 8 | stack pointer here - |--------------------------------------------|<+ <<< on entry to - | Saved r28-r31 4*8 | | ffi_call_LINUX64 - |--------------------------------------------| | - | GPR registers r3-r10 8*8 | | - |--------------------------------------------| | - | FPR registers f1-f13 (optional) 13*8 | | - |--------------------------------------------| | - | Parameter save area | | - |--------------------------------------------| | - | TOC save area 8 | | - |--------------------------------------------| | stack | - | Linker doubleword 8 | | grows | - |--------------------------------------------| | down V - | Compiler doubleword 8 | | - |--------------------------------------------| | lower addresses - | Space for callee's LR 8 | | - |--------------------------------------------| | - | CR save area 8 | | - |--------------------------------------------| | stack pointer here - | Current backchain pointer 8 |-/ during - |--------------------------------------------| <<< ffi_call_LINUX64 - - */ - -/*@-exportheader@*/ -void hidden ffi_prep_args64(extended_cif *ecif, unsigned long *const stack) -/*@=exportheader@*/ -{ - const unsigned long bytes = ecif->cif->bytes; - const unsigned long flags = ecif->cif->flags; - - /* 'stacktop' points at the previous backchain pointer. */ - unsigned long *const stacktop = stack + (bytes / sizeof(unsigned long)); - - /* 'next_arg' points at the space for gpr3, and grows upwards as - we use GPR registers, then continues at rest. */ - unsigned long *const gpr_base = stacktop - ASM_NEEDS_REGISTERS64 - - NUM_GPR_ARG_REGISTERS64; - unsigned long *const gpr_end = gpr_base + NUM_GPR_ARG_REGISTERS64; - unsigned long *const rest = stack + 6 + NUM_GPR_ARG_REGISTERS64; - unsigned long *next_arg = gpr_base; - - /* 'fpr_base' points at the space for fpr3, and grows upwards as - we use FPR registers. */ - double *fpr_base = (double *)gpr_base - NUM_FPR_ARG_REGISTERS64; - int fparg_count = 0; - - int i, words; - ffi_type **ptr; - double double_tmp; - void **p_argv; - unsigned long gprvalue; - - /* Check that everything starts aligned properly. */ - FFI_ASSERT(((unsigned long)(char *)stack & 0xF) == 0); - FFI_ASSERT(((unsigned long)(char *)stacktop & 0xF) == 0); - FFI_ASSERT((bytes & 0xF) == 0); - - /* Deal with return values that are actually pass-by-reference. */ - if (flags & FLAG_RETVAL_REFERENCE) - *next_arg++ = (unsigned long)(char *)ecif->rvalue; - - /* Now for the arguments. */ - p_argv = ecif->avalue; - for (ptr = ecif->cif->arg_types, i = ecif->cif->nargs; - i > 0; - i--, ptr++, p_argv++) - { - switch ((*ptr)->type) - { - case FFI_TYPE_FLOAT: - double_tmp = *(float *)*p_argv; - *(float *)next_arg = (float)double_tmp; - if (++next_arg == gpr_end) - next_arg = rest; - if (fparg_count < NUM_FPR_ARG_REGISTERS64) - *fpr_base++ = double_tmp; - fparg_count++; - FFI_ASSERT(flags & FLAG_FP_ARGUMENTS); - break; - - case FFI_TYPE_DOUBLE: - double_tmp = *(double *)*p_argv; - *(double *)next_arg = double_tmp; - if (++next_arg == gpr_end) - next_arg = rest; - if (fparg_count < NUM_FPR_ARG_REGISTERS64) - *fpr_base++ = double_tmp; - fparg_count++; - FFI_ASSERT(flags & FLAG_FP_ARGUMENTS); - break; - -#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE - case FFI_TYPE_LONGDOUBLE: - double_tmp = ((double *) *p_argv)[0]; - *(double *) next_arg = double_tmp; - if (++next_arg == gpr_end) - next_arg = rest; - if (fparg_count < NUM_FPR_ARG_REGISTERS64) - *fpr_base++ = double_tmp; - fparg_count++; - double_tmp = ((double *) *p_argv)[1]; - *(double *) next_arg = double_tmp; - if (++next_arg == gpr_end) - next_arg = rest; - if (fparg_count < NUM_FPR_ARG_REGISTERS64) - *fpr_base++ = double_tmp; - fparg_count++; - FFI_ASSERT(flags & FLAG_FP_ARGUMENTS); - break; -#endif - - case FFI_TYPE_STRUCT: - words = ((*ptr)->size + 7) / 8; - if (next_arg >= gpr_base && next_arg + words > gpr_end) - { - size_t first = (char *) gpr_end - (char *) next_arg; - memcpy((char *) next_arg, (char *) *p_argv, first); - memcpy((char *) rest, (char *) *p_argv + first, - (*ptr)->size - first); - next_arg = (unsigned long *) ((char *) rest + words * 8 - first); - } - else - { - char *where = (char *) next_arg; - - /* Structures with size less than eight bytes are passed - left-padded. */ - if ((*ptr)->size < 8) - where += 8 - (*ptr)->size; - - memcpy (where, (char *) *p_argv, (*ptr)->size); - next_arg += words; - if (next_arg == gpr_end) - next_arg = rest; - } - break; - - case FFI_TYPE_UINT8: - gprvalue = *(unsigned char *)*p_argv; - goto putgpr; - case FFI_TYPE_SINT8: - gprvalue = *(signed char *)*p_argv; - goto putgpr; - case FFI_TYPE_UINT16: - gprvalue = *(unsigned short *)*p_argv; - goto putgpr; - case FFI_TYPE_SINT16: - gprvalue = *(signed short *)*p_argv; - goto putgpr; - case FFI_TYPE_UINT32: - gprvalue = *(unsigned int *)*p_argv; - goto putgpr; - case FFI_TYPE_INT: - case FFI_TYPE_SINT32: - gprvalue = *(signed int *)*p_argv; - goto putgpr; - - case FFI_TYPE_UINT64: - case FFI_TYPE_SINT64: - case FFI_TYPE_POINTER: - gprvalue = *(unsigned long *)*p_argv; - putgpr: - *next_arg++ = gprvalue; - if (next_arg == gpr_end) - next_arg = rest; - break; - } - } - - FFI_ASSERT(flags & FLAG_4_GPR_ARGUMENTS - || (next_arg >= gpr_base && next_arg <= gpr_base + 4)); -} - - - -/* Perform machine dependent cif processing */ -ffi_status ffi_prep_cif_machdep(ffi_cif *cif) -{ - /* All this is for the SYSV and LINUX64 ABI. */ - int i; - ffi_type **ptr; - unsigned bytes; - int fparg_count = 0, intarg_count = 0; - unsigned flags = 0; - unsigned struct_copy_size = 0; - unsigned type = cif->rtype->type; - - if (cif->abi != FFI_LINUX64) - { - /* All the machine-independent calculation of cif->bytes will be wrong. - Redo the calculation for SYSV. */ - - /* Space for the frame pointer, callee's LR, and the asm's temp regs. */ - bytes = (2 + ASM_NEEDS_REGISTERS) * sizeof(int); - - /* Space for the GPR registers. */ - bytes += NUM_GPR_ARG_REGISTERS * sizeof(int); - } - else - { - /* 64-bit ABI. */ - - /* Space for backchain, CR, LR, cc/ld doubleword, TOC and the asm's temp - regs. */ - bytes = (6 + ASM_NEEDS_REGISTERS64) * sizeof(long); - - /* Space for the mandatory parm save area and general registers. */ - bytes += 2 * NUM_GPR_ARG_REGISTERS64 * sizeof(long); - -#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE - if (type == FFI_TYPE_LONGDOUBLE) - type = FFI_TYPE_DOUBLE; -#endif - } - - /* Return value handling. The rules for SYSV are as follows: - - 32-bit (or less) integer values are returned in gpr3; - - Structures of size <= 4 bytes also returned in gpr3; - - 64-bit integer values and structures between 5 and 8 bytes are returned - in gpr3 and gpr4; - - Single/double FP values are returned in fpr1; - - Larger structures and long double (if not equivalent to double) values - are allocated space and a pointer is passed as the first argument. - For LINUX64: - - integer values in gpr3; - - Structures/Unions by reference; - - Single/double FP values in fpr1, long double in fpr1,fpr2. */ - switch (type) - { - case FFI_TYPE_DOUBLE: - flags |= FLAG_RETURNS_64BITS; - /* Fall through. */ - case FFI_TYPE_FLOAT: - flags |= FLAG_RETURNS_FP; - break; - - case FFI_TYPE_UINT64: - case FFI_TYPE_SINT64: - flags |= FLAG_RETURNS_64BITS; - break; - - case FFI_TYPE_STRUCT: - if (cif->abi != FFI_GCC_SYSV && cif->abi != FFI_LINUX64) - { - if (cif->rtype->size <= 4) - break; - else if (cif->rtype->size <= 8) - { - flags |= FLAG_RETURNS_64BITS; - break; - } - } - /* else fall through. */ -#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE - case FFI_TYPE_LONGDOUBLE: -#endif - intarg_count++; - flags |= FLAG_RETVAL_REFERENCE; - /* Fall through. */ - case FFI_TYPE_VOID: - flags |= FLAG_RETURNS_NOTHING; - break; - - default: - /* Returns 32-bit integer, or similar. Nothing to do here. */ - break; - } - - if (cif->abi != FFI_LINUX64) - /* The first NUM_GPR_ARG_REGISTERS words of integer arguments, and the - first NUM_FPR_ARG_REGISTERS fp arguments, go in registers; the rest - goes on the stack. Structures and long doubles (if not equivalent - to double) are passed as a pointer to a copy of the structure. - Stuff on the stack needs to keep proper alignment. */ - for (ptr = cif->arg_types, i = cif->nargs; i > 0; i--, ptr++) - { - switch ((*ptr)->type) - { - case FFI_TYPE_FLOAT: - fparg_count++; - /* floating singles are not 8-aligned on stack */ - break; - - case FFI_TYPE_DOUBLE: - fparg_count++; - /* If this FP arg is going on the stack, it must be - 8-byte-aligned. */ - if (fparg_count > NUM_FPR_ARG_REGISTERS - && intarg_count%2 != 0) - intarg_count++; - break; - - case FFI_TYPE_UINT64: - case FFI_TYPE_SINT64: - /* 'long long' arguments are passed as two words, but - either both words must fit in registers or both go - on the stack. If they go on the stack, they must - be 8-byte-aligned. */ - if (intarg_count == NUM_GPR_ARG_REGISTERS-1 - || (intarg_count >= NUM_GPR_ARG_REGISTERS - && intarg_count%2 != 0)) - intarg_count++; - intarg_count += 2; - break; - - case FFI_TYPE_STRUCT: -#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE - case FFI_TYPE_LONGDOUBLE: -#endif - /* We must allocate space for a copy of these to enforce - pass-by-value. Pad the space up to a multiple of 16 - bytes (the maximum alignment required for anything under - the SYSV ABI). */ - struct_copy_size += ((*ptr)->size + 15) & ~0xF; - /* Fall through (allocate space for the pointer). */ - - default: - /* Everything else is passed as a 4-byte word in a GPR, either - the object itself or a pointer to it. */ - intarg_count++; - break; - } - } - else - for (ptr = cif->arg_types, i = cif->nargs; i > 0; i--, ptr++) - { - switch ((*ptr)->type) - { -#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE - case FFI_TYPE_LONGDOUBLE: - fparg_count += 2; - intarg_count += 2; - break; -#endif - case FFI_TYPE_FLOAT: - case FFI_TYPE_DOUBLE: - fparg_count++; - intarg_count++; - break; - - case FFI_TYPE_STRUCT: - intarg_count += ((*ptr)->size + 7) / 8; - break; - - default: - /* Everything else is passed as a 8-byte word in a GPR, either - the object itself or a pointer to it. */ - intarg_count++; - break; - } - } - - if (fparg_count != 0) - flags |= FLAG_FP_ARGUMENTS; - if (intarg_count > 4) - flags |= FLAG_4_GPR_ARGUMENTS; - if (struct_copy_size != 0) - flags |= FLAG_ARG_NEEDS_COPY; - - if (cif->abi != FFI_LINUX64) - { - /* Space for the FPR registers, if needed. */ - if (fparg_count != 0) - bytes += NUM_FPR_ARG_REGISTERS * sizeof(double); - - /* Stack space. */ - if (intarg_count > NUM_GPR_ARG_REGISTERS) - bytes += (intarg_count - NUM_GPR_ARG_REGISTERS) * sizeof(int); - if (fparg_count > NUM_FPR_ARG_REGISTERS) - bytes += (fparg_count - NUM_FPR_ARG_REGISTERS) * sizeof(double); - } - else - { - /* Space for the FPR registers, if needed. */ - if (fparg_count != 0) - bytes += NUM_FPR_ARG_REGISTERS64 * sizeof(double); - - /* Stack space. */ - if (intarg_count > NUM_GPR_ARG_REGISTERS64) - bytes += (intarg_count - NUM_GPR_ARG_REGISTERS64) * sizeof(long); - } - - /* The stack space allocated needs to be a multiple of 16 bytes. */ - bytes = (bytes + 15) & ~0xF; - - /* Add in the space for the copied structures. */ - bytes += struct_copy_size; - - cif->flags = flags; - cif->bytes = bytes; - - return FFI_OK; -} - -/*@-declundef@*/ -/*@-exportheader@*/ -extern void ffi_call_SYSV(/*@out@*/ extended_cif *, - unsigned, unsigned, - /*@out@*/ unsigned *, - void (*fn)()); -extern void hidden ffi_call_LINUX64(/*@out@*/ extended_cif *, - unsigned long, unsigned long, - /*@out@*/ unsigned long *, - 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) - { -#ifndef POWERPC64 - case FFI_SYSV: - case FFI_GCC_SYSV: - /*@-usedef@*/ - ffi_call_SYSV(&ecif, -cif->bytes, - cif->flags, ecif.rvalue, fn); - /*@=usedef@*/ - break; -#else - case FFI_LINUX64: - /*@-usedef@*/ - ffi_call_LINUX64(&ecif, -(long) cif->bytes, - cif->flags, ecif.rvalue, fn); - /*@=usedef@*/ - break; -#endif - default: - FFI_ASSERT(0); - break; - } -} - - -#ifndef POWERPC64 -static void flush_icache(char *, int); - -#define MIN_CACHE_LINE_SIZE 8 - -static void flush_icache(char * addr1, int size) -{ - int i; - char * addr; - for (i = 0; i < size; i += MIN_CACHE_LINE_SIZE) { - addr = addr1 + i; - __asm__ volatile ("icbi 0,%0;" "dcbf 0,%0;" : : "r"(addr) : "memory"); - } - addr = addr1 + size - 1; - __asm__ volatile ("icbi 0,%0;" "dcbf 0,%0;" "sync;" "isync;" : : "r"(addr) : "memory"); -} -#endif - -ffi_status -ffi_prep_closure (ffi_closure* closure, - ffi_cif* cif, - void (*fun)(ffi_cif*, void*, void**, void*), - void *user_data) -{ -#ifdef POWERPC64 - void **tramp = (void **) &closure->tramp[0]; - - FFI_ASSERT (cif->abi == FFI_LINUX64); - /* Copy function address and TOC from ffi_closure_LINUX64. */ - memcpy (tramp, (char *) ffi_closure_LINUX64, 16); - tramp[2] = (void *) closure; -#else - unsigned int *tramp; - - FFI_ASSERT (cif->abi == FFI_GCC_SYSV); - - tramp = (unsigned int *) &closure->tramp[0]; - tramp[0] = 0x7c0802a6; /* mflr r0 */ - tramp[1] = 0x4800000d; /* bl 10 */ - tramp[4] = 0x7d6802a6; /* mflr r11 */ - tramp[5] = 0x7c0803a6; /* mtlr r0 */ - tramp[6] = 0x800b0000; /* lwz r0,0(r11) */ - tramp[7] = 0x816b0004; /* lwz r11,4(r11) */ - tramp[8] = 0x7c0903a6; /* mtctr r0 */ - tramp[9] = 0x4e800420; /* bctr */ - *(void **) &tramp[2] = (void *)ffi_closure_SYSV; /* function */ - *(void **) &tramp[3] = (void *)closure; /* context */ - - /* Flush the icache. */ - flush_icache(&closure->tramp[0],FFI_TRAMPOLINE_SIZE); -#endif - - closure->cif = cif; - closure->fun = fun; - closure->user_data = user_data; - - return FFI_OK; -} - -typedef union -{ - float f; - double d; -} ffi_dblfl; - -int ffi_closure_helper_SYSV (ffi_closure*, void*, unsigned long*, - ffi_dblfl*, unsigned long*); - -/* Basically the trampoline invokes ffi_closure_SYSV, and on - * entry, r11 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, void * rvalue, - unsigned long * pgr, ffi_dblfl * pfr, - unsigned long * pst) -{ - /* rvalue is the pointer to space for return value in closure assembly */ - /* pgr is the pointer to where r3-r10 are stored in ffi_closure_SYSV */ - /* pfr is the pointer to where f1-f8 are stored in ffi_closure_SYSV */ - /* pst is the pointer to outgoing parameter stack in original caller */ - - void ** avalue; - ffi_type ** arg_types; - long i, avn; - long nf; /* number of floating registers already used */ - long ng; /* number of general registers already used */ - ffi_cif * cif; - double temp; - - cif = closure->cif; - avalue = alloca(cif->nargs * sizeof(void *)); - - nf = 0; - ng = 0; - - /* Copy the caller's structure return value address so that the closure - returns the data directly to the caller. */ - if (cif->rtype->type == FFI_TYPE_STRUCT) - { - rvalue = (void *) *pgr; - ng++; - pgr++; - } - - i = 0; - avn = cif->nargs; - arg_types = cif->arg_types; - - /* Grab the addresses of the arguments from the stack frame. */ - while (i < avn) - { - switch (arg_types[i]->type) - { - case FFI_TYPE_SINT8: - case FFI_TYPE_UINT8: - /* there are 8 gpr registers used to pass values */ - if (ng < 8) { - avalue[i] = (((char *)pgr)+3); - ng++; - pgr++; - } else { - avalue[i] = (((char *)pst)+3); - pst++; - } - break; - - case FFI_TYPE_SINT16: - case FFI_TYPE_UINT16: - /* there are 8 gpr registers used to pass values */ - if (ng < 8) { - avalue[i] = (((char *)pgr)+2); - ng++; - pgr++; - } else { - avalue[i] = (((char *)pst)+2); - pst++; - } - break; - - case FFI_TYPE_SINT32: - case FFI_TYPE_UINT32: - case FFI_TYPE_POINTER: - /* there are 8 gpr registers used to pass values */ - if (ng < 8) { - avalue[i] = pgr; - ng++; - pgr++; - } else { - avalue[i] = pst; - pst++; - } - break; - - case FFI_TYPE_STRUCT: - /* Structs are passed by reference. The address will appear in a - gpr if it is one of the first 8 arguments. */ - if (ng < 8) { - avalue[i] = (void *) *pgr; - ng++; - pgr++; - } else { - avalue[i] = (void *) *pst; - pst++; - } - break; - - case FFI_TYPE_SINT64: - case FFI_TYPE_UINT64: - /* passing long long ints are complex, they must - * be passed in suitable register pairs such as - * (r3,r4) or (r5,r6) or (r6,r7), or (r7,r8) or (r9,r10) - * and if the entire pair aren't available then the outgoing - * parameter stack is used for both but an alignment of 8 - * must will be kept. So we must either look in pgr - * or pst to find the correct address for this type - * of parameter. - */ - if (ng < 7) { - if (ng & 0x01) { - /* skip r4, r6, r8 as starting points */ - ng++; - pgr++; - } - avalue[i] = pgr; - ng+=2; - pgr+=2; - } else { - if (((long)pst) & 4) pst++; - avalue[i] = pst; - pst+=2; - } - break; - - case FFI_TYPE_FLOAT: - /* unfortunately float values are stored as doubles - * in the ffi_closure_SYSV code (since we don't check - * the type in that routine). - */ - - /* there are 8 64bit floating point registers */ - - if (nf < 8) { - temp = pfr->d; - pfr->f = (float)temp; - avalue[i] = pfr; - nf++; - pfr++; - } else { - /* FIXME? here we are really changing the values - * stored in the original calling routines outgoing - * parameter stack. This is probably a really - * naughty thing to do but... - */ - avalue[i] = pst; - nf++; - pst+=1; - } - break; - - case FFI_TYPE_DOUBLE: - /* On the outgoing stack all values are aligned to 8 */ - /* there are 8 64bit floating point registers */ - - if (nf < 8) { - avalue[i] = pfr; - nf++; - pfr++; - } else { - if (((long)pst) & 4) pst++; - avalue[i] = pst; - nf++; - pst+=2; - } - break; - - default: - FFI_ASSERT(0); - } - - i++; - } - - - (closure->fun) (cif, rvalue, avalue, closure->user_data); - - /* Tell ffi_closure_SYSV how to perform return type promotions. */ - return cif->rtype->type; - -} - -int hidden ffi_closure_helper_LINUX64 (ffi_closure*, void*, unsigned long*, - ffi_dblfl*); - -int hidden -ffi_closure_helper_LINUX64 (ffi_closure *closure, void *rvalue, - unsigned long *pst, ffi_dblfl *pfr) -{ - /* rvalue is the pointer to space for return value in closure assembly */ - /* pst is the pointer to parameter save area - (r3-r10 are stored into its first 8 slots by ffi_closure_LINUX64) */ - /* pfr is the pointer to where f1-f13 are stored in ffi_closure_LINUX64 */ - - void **avalue; - ffi_type **arg_types; - long i, avn; - ffi_cif *cif; - ffi_dblfl *end_pfr = pfr + NUM_FPR_ARG_REGISTERS64; - - 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 (cif->rtype->type == FFI_TYPE_STRUCT) - { - rvalue = (void *) *pst; - pst++; - } - - i = 0; - avn = cif->nargs; - arg_types = cif->arg_types; - - /* Grab the addresses of the arguments from the stack frame. */ - while (i < avn) - { - switch (arg_types[i]->type) - { - case FFI_TYPE_SINT8: - case FFI_TYPE_UINT8: - avalue[i] = (char *) pst + 7; - pst++; - break; - - case FFI_TYPE_SINT16: - case FFI_TYPE_UINT16: - avalue[i] = (char *) pst + 6; - pst++; - break; - - case FFI_TYPE_SINT32: - case FFI_TYPE_UINT32: - avalue[i] = (char *) pst + 4; - pst++; - break; - - case FFI_TYPE_SINT64: - case FFI_TYPE_UINT64: - case FFI_TYPE_POINTER: - avalue[i] = pst; - pst++; - break; - - case FFI_TYPE_STRUCT: - /* Structures with size less than eight bytes are passed - left-padded. */ - if (arg_types[i]->size < 8) - avalue[i] = (char *) pst + 8 - arg_types[i]->size; - else - avalue[i] = pst; - pst += (arg_types[i]->size + 7) / 8; - break; - - case FFI_TYPE_FLOAT: - /* unfortunately float values are stored as doubles - * in the ffi_closure_LINUX64 code (since we don't check - * the type in that routine). - */ - - /* there are 13 64bit floating point registers */ - - if (pfr < end_pfr) - { - double temp = pfr->d; - pfr->f = (float) temp; - avalue[i] = pfr; - pfr++; - } - else - avalue[i] = pst; - pst++; - break; - - case FFI_TYPE_DOUBLE: - /* On the outgoing stack all values are aligned to 8 */ - /* there are 13 64bit floating point registers */ - - if (pfr < end_pfr) - { - avalue[i] = pfr; - pfr++; - } - else - avalue[i] = pst; - pst++; - break; - -#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE - case FFI_TYPE_LONGDOUBLE: - if (pfr + 1 < end_pfr) - { - avalue[i] = pfr; - pfr += 2; - } - else - { - if (pfr < end_pfr) - { - /* Passed partly in f13 and partly on the stack. - Move it all to the stack. */ - *pst = *(unsigned long *) pfr; - pfr++; - } - avalue[i] = pst; - } - pst += 2; - break; -#endif - - default: - FFI_ASSERT(0); - } - - i++; - } - - - (closure->fun) (cif, rvalue, avalue, closure->user_data); - - /* Tell ffi_closure_LINUX64 how to perform return type promotions. */ - return cif->rtype->type; -} -- cgit v1.2.3