diff options
Diffstat (limited to 'Modules/_ctypes/libffi/src/s390/ffi.c')
| -rw-r--r-- | Modules/_ctypes/libffi/src/s390/ffi.c | 781 |
1 files changed, 0 insertions, 781 deletions
diff --git a/Modules/_ctypes/libffi/src/s390/ffi.c b/Modules/_ctypes/libffi/src/s390/ffi.c deleted file mode 100644 index 8adb5bc0ba..0000000000 --- a/Modules/_ctypes/libffi/src/s390/ffi.c +++ /dev/null @@ -1,781 +0,0 @@ -/* ----------------------------------------------------------------------- - ffi.c - Copyright (c) 2000, 2007 Software AG - Copyright (c) 2008 Red Hat, Inc - - S390 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 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. - ----------------------------------------------------------------------- */ -/*====================================================================*/ -/* Includes */ -/* -------- */ -/*====================================================================*/ - -#include <ffi.h> -#include <ffi_common.h> - -#include <stdlib.h> -#include <stdio.h> - -/*====================== End of Includes =============================*/ - -/*====================================================================*/ -/* Defines */ -/* ------- */ -/*====================================================================*/ - -/* Maximum number of GPRs available for argument passing. */ -#define MAX_GPRARGS 5 - -/* Maximum number of FPRs available for argument passing. */ -#ifdef __s390x__ -#define MAX_FPRARGS 4 -#else -#define MAX_FPRARGS 2 -#endif - -/* Round to multiple of 16. */ -#define ROUND_SIZE(size) (((size) + 15) & ~15) - -/* If these values change, sysv.S must be adapted! */ -#define FFI390_RET_VOID 0 -#define FFI390_RET_STRUCT 1 -#define FFI390_RET_FLOAT 2 -#define FFI390_RET_DOUBLE 3 -#define FFI390_RET_INT32 4 -#define FFI390_RET_INT64 5 - -/*===================== End of Defines ===============================*/ - -/*====================================================================*/ -/* Prototypes */ -/* ---------- */ -/*====================================================================*/ - -static void ffi_prep_args (unsigned char *, extended_cif *); -void -#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2) -__attribute__ ((visibility ("hidden"))) -#endif -ffi_closure_helper_SYSV (ffi_closure *, unsigned long *, - unsigned long long *, unsigned long *); - -/*====================== End of Prototypes ===========================*/ - -/*====================================================================*/ -/* Externals */ -/* --------- */ -/*====================================================================*/ - -extern void ffi_call_SYSV(unsigned, - extended_cif *, - void (*)(unsigned char *, extended_cif *), - unsigned, - void *, - void (*fn)(void)); - -extern void ffi_closure_SYSV(void); - -/*====================== End of Externals ============================*/ - -/*====================================================================*/ -/* */ -/* Name - ffi_check_struct_type. */ -/* */ -/* Function - Determine if a structure can be passed within a */ -/* general purpose or floating point register. */ -/* */ -/*====================================================================*/ - -static int -ffi_check_struct_type (ffi_type *arg) -{ - size_t size = arg->size; - - /* If the struct has just one element, look at that element - to find out whether to consider the struct as floating point. */ - while (arg->type == FFI_TYPE_STRUCT - && arg->elements[0] && !arg->elements[1]) - arg = arg->elements[0]; - - /* Structs of size 1, 2, 4, and 8 are passed in registers, - just like the corresponding int/float types. */ - switch (size) - { - case 1: - return FFI_TYPE_UINT8; - - case 2: - return FFI_TYPE_UINT16; - - case 4: - if (arg->type == FFI_TYPE_FLOAT) - return FFI_TYPE_FLOAT; - else - return FFI_TYPE_UINT32; - - case 8: - if (arg->type == FFI_TYPE_DOUBLE) - return FFI_TYPE_DOUBLE; - else - return FFI_TYPE_UINT64; - - default: - break; - } - - /* Other structs are passed via a pointer to the data. */ - return FFI_TYPE_POINTER; -} - -/*======================== End of Routine ============================*/ - -/*====================================================================*/ -/* */ -/* Name - ffi_prep_args. */ -/* */ -/* Function - Prepare parameters for call to function. */ -/* */ -/* ffi_prep_args is called by the assembly routine once stack space */ -/* has been allocated for the function's arguments. */ -/* */ -/*====================================================================*/ - -static void -ffi_prep_args (unsigned char *stack, extended_cif *ecif) -{ - /* The stack space will be filled with those areas: - - FPR argument register save area (highest addresses) - GPR argument register save area - temporary struct copies - overflow argument area (lowest addresses) - - We set up the following pointers: - - p_fpr: bottom of the FPR area (growing upwards) - p_gpr: bottom of the GPR area (growing upwards) - p_ov: bottom of the overflow area (growing upwards) - p_struct: top of the struct copy area (growing downwards) - - All areas are kept aligned to twice the word size. */ - - int gpr_off = ecif->cif->bytes; - int fpr_off = gpr_off + ROUND_SIZE (MAX_GPRARGS * sizeof (long)); - - unsigned long long *p_fpr = (unsigned long long *)(stack + fpr_off); - unsigned long *p_gpr = (unsigned long *)(stack + gpr_off); - unsigned char *p_struct = (unsigned char *)p_gpr; - unsigned long *p_ov = (unsigned long *)stack; - - int n_fpr = 0; - int n_gpr = 0; - int n_ov = 0; - - ffi_type **ptr; - void **p_argv = ecif->avalue; - int i; - - /* If we returning a structure then we set the first parameter register - to the address of where we are returning this structure. */ - - if (ecif->cif->flags == FFI390_RET_STRUCT) - p_gpr[n_gpr++] = (unsigned long) ecif->rvalue; - - /* Now for the arguments. */ - - for (ptr = ecif->cif->arg_types, i = ecif->cif->nargs; - i > 0; - i--, ptr++, p_argv++) - { - void *arg = *p_argv; - int type = (*ptr)->type; - -#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE - /* 16-byte long double is passed like a struct. */ - if (type == FFI_TYPE_LONGDOUBLE) - type = FFI_TYPE_STRUCT; -#endif - - /* Check how a structure type is passed. */ - if (type == FFI_TYPE_STRUCT) - { - type = ffi_check_struct_type (*ptr); - - /* If we pass the struct via pointer, copy the data. */ - if (type == FFI_TYPE_POINTER) - { - p_struct -= ROUND_SIZE ((*ptr)->size); - memcpy (p_struct, (char *)arg, (*ptr)->size); - arg = &p_struct; - } - } - - /* Now handle all primitive int/pointer/float data types. */ - switch (type) - { - case FFI_TYPE_DOUBLE: - if (n_fpr < MAX_FPRARGS) - p_fpr[n_fpr++] = *(unsigned long long *) arg; - else -#ifdef __s390x__ - p_ov[n_ov++] = *(unsigned long *) arg; -#else - p_ov[n_ov++] = ((unsigned long *) arg)[0], - p_ov[n_ov++] = ((unsigned long *) arg)[1]; -#endif - break; - - case FFI_TYPE_FLOAT: - if (n_fpr < MAX_FPRARGS) - p_fpr[n_fpr++] = (long long) *(unsigned int *) arg << 32; - else - p_ov[n_ov++] = *(unsigned int *) arg; - break; - - case FFI_TYPE_POINTER: - if (n_gpr < MAX_GPRARGS) - p_gpr[n_gpr++] = (unsigned long)*(unsigned char **) arg; - else - p_ov[n_ov++] = (unsigned long)*(unsigned char **) arg; - break; - - case FFI_TYPE_UINT64: - case FFI_TYPE_SINT64: -#ifdef __s390x__ - if (n_gpr < MAX_GPRARGS) - p_gpr[n_gpr++] = *(unsigned long *) arg; - else - p_ov[n_ov++] = *(unsigned long *) arg; -#else - if (n_gpr == MAX_GPRARGS-1) - n_gpr = MAX_GPRARGS; - if (n_gpr < MAX_GPRARGS) - p_gpr[n_gpr++] = ((unsigned long *) arg)[0], - p_gpr[n_gpr++] = ((unsigned long *) arg)[1]; - else - p_ov[n_ov++] = ((unsigned long *) arg)[0], - p_ov[n_ov++] = ((unsigned long *) arg)[1]; -#endif - break; - - case FFI_TYPE_UINT32: - if (n_gpr < MAX_GPRARGS) - p_gpr[n_gpr++] = *(unsigned int *) arg; - else - p_ov[n_ov++] = *(unsigned int *) arg; - break; - - case FFI_TYPE_INT: - case FFI_TYPE_SINT32: - if (n_gpr < MAX_GPRARGS) - p_gpr[n_gpr++] = *(signed int *) arg; - else - p_ov[n_ov++] = *(signed int *) arg; - break; - - case FFI_TYPE_UINT16: - if (n_gpr < MAX_GPRARGS) - p_gpr[n_gpr++] = *(unsigned short *) arg; - else - p_ov[n_ov++] = *(unsigned short *) arg; - break; - - case FFI_TYPE_SINT16: - if (n_gpr < MAX_GPRARGS) - p_gpr[n_gpr++] = *(signed short *) arg; - else - p_ov[n_ov++] = *(signed short *) arg; - break; - - case FFI_TYPE_UINT8: - if (n_gpr < MAX_GPRARGS) - p_gpr[n_gpr++] = *(unsigned char *) arg; - else - p_ov[n_ov++] = *(unsigned char *) arg; - break; - - case FFI_TYPE_SINT8: - if (n_gpr < MAX_GPRARGS) - p_gpr[n_gpr++] = *(signed char *) arg; - else - p_ov[n_ov++] = *(signed char *) arg; - break; - - default: - FFI_ASSERT (0); - break; - } - } -} - -/*======================== End of Routine ============================*/ - -/*====================================================================*/ -/* */ -/* Name - ffi_prep_cif_machdep. */ -/* */ -/* Function - Perform machine dependent CIF processing. */ -/* */ -/*====================================================================*/ - -ffi_status -ffi_prep_cif_machdep(ffi_cif *cif) -{ - size_t struct_size = 0; - int n_gpr = 0; - int n_fpr = 0; - int n_ov = 0; - - ffi_type **ptr; - int i; - - /* Determine return value handling. */ - - switch (cif->rtype->type) - { - /* Void is easy. */ - case FFI_TYPE_VOID: - cif->flags = FFI390_RET_VOID; - break; - - /* Structures are returned via a hidden pointer. */ - case FFI_TYPE_STRUCT: - cif->flags = FFI390_RET_STRUCT; - n_gpr++; /* We need one GPR to pass the pointer. */ - break; - - /* Floating point values are returned in fpr 0. */ - case FFI_TYPE_FLOAT: - cif->flags = FFI390_RET_FLOAT; - break; - - case FFI_TYPE_DOUBLE: - cif->flags = FFI390_RET_DOUBLE; - break; - -#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE - case FFI_TYPE_LONGDOUBLE: - cif->flags = FFI390_RET_STRUCT; - n_gpr++; - break; -#endif - /* Integer values are returned in gpr 2 (and gpr 3 - for 64-bit values on 31-bit machines). */ - case FFI_TYPE_UINT64: - case FFI_TYPE_SINT64: - cif->flags = FFI390_RET_INT64; - break; - - case FFI_TYPE_POINTER: - case FFI_TYPE_INT: - case FFI_TYPE_UINT32: - case FFI_TYPE_SINT32: - case FFI_TYPE_UINT16: - case FFI_TYPE_SINT16: - case FFI_TYPE_UINT8: - case FFI_TYPE_SINT8: - /* These are to be extended to word size. */ -#ifdef __s390x__ - cif->flags = FFI390_RET_INT64; -#else - cif->flags = FFI390_RET_INT32; -#endif - break; - - default: - FFI_ASSERT (0); - break; - } - - /* Now for the arguments. */ - - for (ptr = cif->arg_types, i = cif->nargs; - i > 0; - i--, ptr++) - { - int type = (*ptr)->type; - -#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE - /* 16-byte long double is passed like a struct. */ - if (type == FFI_TYPE_LONGDOUBLE) - type = FFI_TYPE_STRUCT; -#endif - - /* Check how a structure type is passed. */ - if (type == FFI_TYPE_STRUCT) - { - type = ffi_check_struct_type (*ptr); - - /* If we pass the struct via pointer, we must reserve space - to copy its data for proper call-by-value semantics. */ - if (type == FFI_TYPE_POINTER) - struct_size += ROUND_SIZE ((*ptr)->size); - } - - /* Now handle all primitive int/float data types. */ - switch (type) - { - /* The first MAX_FPRARGS floating point arguments - go in FPRs, the rest overflow to the stack. */ - - case FFI_TYPE_DOUBLE: - if (n_fpr < MAX_FPRARGS) - n_fpr++; - else - n_ov += sizeof (double) / sizeof (long); - break; - - case FFI_TYPE_FLOAT: - if (n_fpr < MAX_FPRARGS) - n_fpr++; - else - n_ov++; - break; - - /* On 31-bit machines, 64-bit integers are passed in GPR pairs, - if one is still available, or else on the stack. If only one - register is free, skip the register (it won't be used for any - subsequent argument either). */ - -#ifndef __s390x__ - case FFI_TYPE_UINT64: - case FFI_TYPE_SINT64: - if (n_gpr == MAX_GPRARGS-1) - n_gpr = MAX_GPRARGS; - if (n_gpr < MAX_GPRARGS) - n_gpr += 2; - else - n_ov += 2; - break; -#endif - - /* Everything else is passed in GPRs (until MAX_GPRARGS - have been used) or overflows to the stack. */ - - default: - if (n_gpr < MAX_GPRARGS) - n_gpr++; - else - n_ov++; - break; - } - } - - /* Total stack space as required for overflow arguments - and temporary structure copies. */ - - cif->bytes = ROUND_SIZE (n_ov * sizeof (long)) + struct_size; - - return FFI_OK; -} - -/*======================== End of Routine ============================*/ - -/*====================================================================*/ -/* */ -/* Name - ffi_call. */ -/* */ -/* Function - Call the FFI routine. */ -/* */ -/*====================================================================*/ - -void -ffi_call(ffi_cif *cif, - void (*fn)(void), - void *rvalue, - void **avalue) -{ - int ret_type = cif->flags; - extended_cif ecif; - - ecif.cif = cif; - ecif.avalue = avalue; - ecif.rvalue = rvalue; - - /* If we don't have a return value, we need to fake one. */ - if (rvalue == NULL) - { - if (ret_type == FFI390_RET_STRUCT) - ecif.rvalue = alloca (cif->rtype->size); - else - ret_type = FFI390_RET_VOID; - } - - switch (cif->abi) - { - case FFI_SYSV: - ffi_call_SYSV (cif->bytes, &ecif, ffi_prep_args, - ret_type, ecif.rvalue, fn); - break; - - default: - FFI_ASSERT (0); - break; - } -} - -/*======================== End of Routine ============================*/ - -/*====================================================================*/ -/* */ -/* Name - ffi_closure_helper_SYSV. */ -/* */ -/* Function - Call a FFI closure target function. */ -/* */ -/*====================================================================*/ - -void -ffi_closure_helper_SYSV (ffi_closure *closure, - unsigned long *p_gpr, - unsigned long long *p_fpr, - unsigned long *p_ov) -{ - unsigned long long ret_buffer; - - void *rvalue = &ret_buffer; - void **avalue; - void **p_arg; - - int n_gpr = 0; - int n_fpr = 0; - int n_ov = 0; - - ffi_type **ptr; - int i; - - /* Allocate buffer for argument list pointers. */ - - p_arg = avalue = alloca (closure->cif->nargs * sizeof (void *)); - - /* If we returning a structure, pass the structure address - directly to the target function. Otherwise, have the target - function store the return value to the GPR save area. */ - - if (closure->cif->flags == FFI390_RET_STRUCT) - rvalue = (void *) p_gpr[n_gpr++]; - - /* Now for the arguments. */ - - for (ptr = closure->cif->arg_types, i = closure->cif->nargs; - i > 0; - i--, p_arg++, ptr++) - { - int deref_struct_pointer = 0; - int type = (*ptr)->type; - -#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE - /* 16-byte long double is passed like a struct. */ - if (type == FFI_TYPE_LONGDOUBLE) - type = FFI_TYPE_STRUCT; -#endif - - /* Check how a structure type is passed. */ - if (type == FFI_TYPE_STRUCT) - { - type = ffi_check_struct_type (*ptr); - - /* If we pass the struct via pointer, remember to - retrieve the pointer later. */ - if (type == FFI_TYPE_POINTER) - deref_struct_pointer = 1; - } - - /* Pointers are passed like UINTs of the same size. */ - if (type == FFI_TYPE_POINTER) -#ifdef __s390x__ - type = FFI_TYPE_UINT64; -#else - type = FFI_TYPE_UINT32; -#endif - - /* Now handle all primitive int/float data types. */ - switch (type) - { - case FFI_TYPE_DOUBLE: - if (n_fpr < MAX_FPRARGS) - *p_arg = &p_fpr[n_fpr++]; - else - *p_arg = &p_ov[n_ov], - n_ov += sizeof (double) / sizeof (long); - break; - - case FFI_TYPE_FLOAT: - if (n_fpr < MAX_FPRARGS) - *p_arg = &p_fpr[n_fpr++]; - else - *p_arg = (char *)&p_ov[n_ov++] + sizeof (long) - 4; - break; - - case FFI_TYPE_UINT64: - case FFI_TYPE_SINT64: -#ifdef __s390x__ - if (n_gpr < MAX_GPRARGS) - *p_arg = &p_gpr[n_gpr++]; - else - *p_arg = &p_ov[n_ov++]; -#else - if (n_gpr == MAX_GPRARGS-1) - n_gpr = MAX_GPRARGS; - if (n_gpr < MAX_GPRARGS) - *p_arg = &p_gpr[n_gpr], n_gpr += 2; - else - *p_arg = &p_ov[n_ov], n_ov += 2; -#endif - break; - - case FFI_TYPE_INT: - case FFI_TYPE_UINT32: - case FFI_TYPE_SINT32: - if (n_gpr < MAX_GPRARGS) - *p_arg = (char *)&p_gpr[n_gpr++] + sizeof (long) - 4; - else - *p_arg = (char *)&p_ov[n_ov++] + sizeof (long) - 4; - break; - - case FFI_TYPE_UINT16: - case FFI_TYPE_SINT16: - if (n_gpr < MAX_GPRARGS) - *p_arg = (char *)&p_gpr[n_gpr++] + sizeof (long) - 2; - else - *p_arg = (char *)&p_ov[n_ov++] + sizeof (long) - 2; - break; - - case FFI_TYPE_UINT8: - case FFI_TYPE_SINT8: - if (n_gpr < MAX_GPRARGS) - *p_arg = (char *)&p_gpr[n_gpr++] + sizeof (long) - 1; - else - *p_arg = (char *)&p_ov[n_ov++] + sizeof (long) - 1; - break; - - default: - FFI_ASSERT (0); - break; - } - - /* If this is a struct passed via pointer, we need to - actually retrieve that pointer. */ - if (deref_struct_pointer) - *p_arg = *(void **)*p_arg; - } - - - /* Call the target function. */ - (closure->fun) (closure->cif, rvalue, avalue, closure->user_data); - - /* Convert the return value. */ - switch (closure->cif->rtype->type) - { - /* Void is easy, and so is struct. */ - case FFI_TYPE_VOID: - case FFI_TYPE_STRUCT: -#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE - case FFI_TYPE_LONGDOUBLE: -#endif - break; - - /* Floating point values are returned in fpr 0. */ - case FFI_TYPE_FLOAT: - p_fpr[0] = (long long) *(unsigned int *) rvalue << 32; - break; - - case FFI_TYPE_DOUBLE: - p_fpr[0] = *(unsigned long long *) rvalue; - break; - - /* Integer values are returned in gpr 2 (and gpr 3 - for 64-bit values on 31-bit machines). */ - case FFI_TYPE_UINT64: - case FFI_TYPE_SINT64: -#ifdef __s390x__ - p_gpr[0] = *(unsigned long *) rvalue; -#else - p_gpr[0] = ((unsigned long *) rvalue)[0], - p_gpr[1] = ((unsigned long *) rvalue)[1]; -#endif - break; - - case FFI_TYPE_POINTER: - case FFI_TYPE_UINT32: - case FFI_TYPE_UINT16: - case FFI_TYPE_UINT8: - p_gpr[0] = *(unsigned long *) rvalue; - break; - - case FFI_TYPE_INT: - case FFI_TYPE_SINT32: - case FFI_TYPE_SINT16: - case FFI_TYPE_SINT8: - p_gpr[0] = *(signed long *) rvalue; - break; - - default: - FFI_ASSERT (0); - break; - } -} - -/*======================== End of Routine ============================*/ - -/*====================================================================*/ -/* */ -/* Name - ffi_prep_closure_loc. */ -/* */ -/* Function - Prepare a FFI closure. */ -/* */ -/*====================================================================*/ - -ffi_status -ffi_prep_closure_loc (ffi_closure *closure, - ffi_cif *cif, - void (*fun) (ffi_cif *, void *, void **, void *), - void *user_data, - void *codeloc) -{ - if (cif->abi != FFI_SYSV) - return FFI_BAD_ABI; - -#ifndef __s390x__ - *(short *)&closure->tramp [0] = 0x0d10; /* basr %r1,0 */ - *(short *)&closure->tramp [2] = 0x9801; /* lm %r0,%r1,6(%r1) */ - *(short *)&closure->tramp [4] = 0x1006; - *(short *)&closure->tramp [6] = 0x07f1; /* br %r1 */ - *(long *)&closure->tramp [8] = (long)codeloc; - *(long *)&closure->tramp[12] = (long)&ffi_closure_SYSV; -#else - *(short *)&closure->tramp [0] = 0x0d10; /* basr %r1,0 */ - *(short *)&closure->tramp [2] = 0xeb01; /* lmg %r0,%r1,14(%r1) */ - *(short *)&closure->tramp [4] = 0x100e; - *(short *)&closure->tramp [6] = 0x0004; - *(short *)&closure->tramp [8] = 0x07f1; /* br %r1 */ - *(long *)&closure->tramp[16] = (long)codeloc; - *(long *)&closure->tramp[24] = (long)&ffi_closure_SYSV; -#endif - - closure->cif = cif; - closure->user_data = user_data; - closure->fun = fun; - - return FFI_OK; -} - -/*======================== End of Routine ============================*/ - |