From 38e46503a1f78166e5f0730133f15bb3cb70f588 Mon Sep 17 00:00:00 2001 From: tianshuliang Date: Sun, 25 Apr 2021 13:51:41 +0800 Subject: [PATCH] append support for csky --- configure.host | 5 + src/csky/ffi.c | 395 +++++++++++++++++++++++++++++++++++++++++++ src/csky/ffitarget.h | 63 +++++++ src/csky/sysv.S | 371 ++++++++++++++++++++++++++++++++++++++++ 4 files changed, 834 insertions(+) create mode 100644 src/csky/ffi.c create mode 100644 src/csky/ffitarget.h create mode 100644 src/csky/sysv.S diff --git a/configure.host b/configure.host index 9a72cda..3deed6c 100644 --- a/configure.host +++ b/configure.host @@ -214,6 +214,11 @@ case "${host}" in TARGET=RISCV; TARGETDIR=riscv SOURCES="ffi.c sysv.S" ;; + + csky*-*) + TARGET=CSKY; TARGETDIR=csky + SOURCES="ffi.c sysv.S" + ;; s390-*-* | s390x-*-*) TARGET=S390; TARGETDIR=s390 diff --git a/src/csky/ffi.c b/src/csky/ffi.c new file mode 100644 index 0000000..eb53848 --- /dev/null +++ b/src/csky/ffi.c @@ -0,0 +1,395 @@ +/* ----------------------------------------------------------------------- + ffi.c + + CSKY 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 +#include + +#include + +/* 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 void **p_argv; + register char *argp; + register ffi_type **p_arg; + + argp = stack; + + if ( ecif->cif->flags == 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; + size_t alignment; + + /* Align if necessary */ + alignment = (*p_arg)->alignment; +#ifdef __CSKYABIV1__ + /* + * Adapt ABIV1 bug. + * If struct's size is larger than 8 bytes, then it always alignment as 4 bytes. + */ + if (((*p_arg)->type == FFI_TYPE_STRUCT) && ((*p_arg)->size > 8) && (alignment == 8)) { + alignment = 4; + } +#endif + + if ((alignment - 1) & (unsigned) argp) { + argp = (char *) FFI_ALIGN(argp, alignment); + } + + if ((*p_arg)->type == FFI_TYPE_STRUCT) + argp = (char *) FFI_ALIGN(argp, 4); + + 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: +#ifdef __CSKYBE__ + memcpy((argp + 4 - (*p_arg)->size), *p_argv, (*p_arg)->size); +#else + memcpy(argp, *p_argv, (*p_arg)->size); +#endif + 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) +{ + /* Round the stack up to a multiple of 8 bytes. This isn't needed + everywhere, but it is on some platforms, and it doesn't hcsky anything + when it isn't needed. */ + cif->bytes = (cif->bytes + 7) & ~7; + + /* Set the return type flag */ + switch (cif->rtype->type) + { + + case FFI_TYPE_DOUBLE: + case FFI_TYPE_SINT64: + case FFI_TYPE_UINT64: + cif->flags = (unsigned) FFI_TYPE_SINT64; + break; + + case FFI_TYPE_STRUCT: + if (cif->rtype->size <= 4) + /* A Composite Type not larger than 4 bytes is returned in r0. */ + cif->flags = (unsigned)FFI_TYPE_INT; + else if (cif->rtype->size <= 8) + /* A Composite Type not larger than 8 bytes is returned in r0, r1. */ + cif->flags = (unsigned)FFI_TYPE_SINT64; + else + /* A Composite Type larger than 8 bytes, or whose size cannot + be determined statically ... is stored in memory at an + address passed [in r0]. */ + cif->flags = (unsigned)FFI_TYPE_STRUCT; + break; + + default: + cif->flags = FFI_TYPE_INT; + break; + } + + return FFI_OK; +} + +/* Perform machine dependent cif processing for variadic calls */ +ffi_status ffi_prep_cif_machdep_var(ffi_cif *cif, + unsigned int nfixedargs, + unsigned int ntotalargs) +{ + return ffi_prep_cif_machdep(cif); +} + +/* Prototypes for assembly functions, in sysv.S */ +extern void ffi_call_SYSV (void (*fn)(void), extended_cif *, unsigned, unsigned, unsigned *); + +void ffi_call(ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue) +{ + extended_cif ecif; + + int small_struct = (cif->flags == FFI_TYPE_INT + && cif->rtype->type == FFI_TYPE_STRUCT); + + ecif.cif = cif; + ecif.avalue = avalue; + + unsigned int temp; + + /* 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->flags == FFI_TYPE_STRUCT)) + { + ecif.rvalue = alloca(cif->rtype->size); + } + else if (small_struct) + ecif.rvalue = &temp; + else + ecif.rvalue = rvalue; + + switch (cif->abi) + { + case FFI_SYSV: + ffi_call_SYSV (fn, &ecif, cif->bytes, cif->flags, ecif.rvalue); + break; + + default: + FFI_ASSERT(0); + break; + } + if (small_struct) +#ifdef __CSKYBE__ + memcpy (rvalue, ((unsigned char *)&temp + (4 - cif->rtype->size)), cif->rtype->size); +#else + memcpy (rvalue, &temp, cif->rtype->size); +#endif +} + +/** private members **/ + +static void ffi_prep_incoming_args_SYSV (char *stack, void **ret, + void** args, ffi_cif* cif); + +void ffi_closure_SYSV (ffi_closure *); + +/* This function is jumped to by the trampoline */ + +unsigned int +ffi_closure_SYSV_inner (closure, respp, args) + ffi_closure *closure; + void **respp; + void *args; +{ + // our various things... + ffi_cif *cif; + void **arg_area; + + cif = closure->cif; + arg_area = (void**) alloca (cif->nargs * sizeof (void*)); + + /* this call will initialize ARG_AREA, such that each + * element in that array points to the corresponding + * value on the stack; and if the function returns + * a structure, it will re-set RESP to point to the + * structure return address. */ + + ffi_prep_incoming_args_SYSV(args, respp, arg_area, cif); + + (closure->fun) (cif, *respp, arg_area, closure->user_data); + +#ifdef __CSKYBE__ + if (cif->flags == FFI_TYPE_INT && cif->rtype->type == FFI_TYPE_STRUCT) { + unsigned int tmp = 0; + tmp = *(unsigned int *)(*respp); + *(unsigned int *)(*respp) = (tmp >> ((4 - cif->rtype->size) * 8)); + } +#endif + + return cif->flags; +} + + +static void +ffi_prep_incoming_args_SYSV(char *stack, void **rvalue, + void **avalue, ffi_cif *cif) +{ + register unsigned int i; + register void **p_argv; + register char *argp; + register ffi_type **p_arg; + + argp = stack; + + if ( cif->flags == FFI_TYPE_STRUCT ) { + *rvalue = *(void **) argp; + argp += 4; + } + + p_argv = avalue; + + for (i = cif->nargs, p_arg = cif->arg_types; (i != 0); i--, p_arg++) + { + size_t z; + size_t alignment; + + alignment = (*p_arg)->alignment; + if (alignment < 4) + alignment = 4; + +#ifdef __CSKYABIV1__ + /* + * Adapt ABIV1 bug. + * If struct's size is larger than 8 bytes, then it always alignment as 4 bytes. + */ + if (((*p_arg)->type == FFI_TYPE_STRUCT) && ((*p_arg)->size > 8) && (alignment == 8)) { + alignment = 4; + } +#endif + + /* Align if necessary */ + if ((alignment - 1) & (unsigned) argp) { + argp = (char *) FFI_ALIGN(argp, alignment); + } + + z = (*p_arg)->size; + +#ifdef __CSKYBE__ + unsigned int tmp = 0; + if ((*p_arg)->size < 4) { + tmp = *(unsigned int *)argp; + memcpy(argp, ((unsigned char *)&tmp + (4 - (*p_arg)->size)), (*p_arg)->size); + } +#else + /* because we're little endian, this is what it turns into. */ +#endif + *p_argv = (void*) argp; + + p_argv++; + argp += z; + } + + return; +} + +/* How to make a trampoline. */ + +extern unsigned char ffi_csky_trampoline[TRAMPOLINE_SIZE]; + +/* + * Since there is no __clear_cache in libgcc in csky toolchain. + * define ffi_csky_cacheflush in sysv.S. + * void ffi_csky_cacheflush(uint32 start_addr, uint32 size, int cache) + */ +#define CACHEFLUSH_IN_FFI 1 +#if CACHEFLUSH_IN_FFI +extern void ffi_csky_cacheflush(unsigned char *__tramp, unsigned int k, + int i); +#define FFI_INIT_TRAMPOLINE(TRAMP,FUN,CTX) \ +({ unsigned char *__tramp = (unsigned char*)(TRAMP); \ + unsigned int __fun = (unsigned int)(FUN); \ + unsigned int __ctx = (unsigned int)(CTX); \ + unsigned char *insns = (unsigned char *)(CTX); \ + memcpy (__tramp, ffi_csky_trampoline, TRAMPOLINE_SIZE); \ + *(unsigned int*) &__tramp[TRAMPOLINE_SIZE] = __ctx; \ + *(unsigned int*) &__tramp[TRAMPOLINE_SIZE + 4] = __fun; \ + ffi_csky_cacheflush(&__tramp[0], TRAMPOLINE_SIZE, 3); /* Clear data mapping. */ \ + ffi_csky_cacheflush(insns, TRAMPOLINE_SIZE, 3); \ + /* Clear instruction \ + mapping. */ \ + }) +#else +#define FFI_INIT_TRAMPOLINE(TRAMP,FUN,CTX) \ +({ unsigned char *__tramp = (unsigned char*)(TRAMP); \ + unsigned int __fun = (unsigned int)(FUN); \ + unsigned int __ctx = (unsigned int)(CTX); \ + unsigned char *insns = (unsigned char *)(CTX); \ + memcpy (__tramp, ffi_csky_trampoline, TRAMPOLINE_SIZE); \ + *(unsigned int*) &__tramp[TRAMPOLINE_SIZE] = __ctx; \ + *(unsigned int*) &__tramp[TRAMPOLINE_SIZE + 4] = __fun; \ + __clear_cache((&__tramp[0]), (&__tramp[TRAMPOLINE_SIZE-1])); /* Clear data mapping. */ \ + __clear_cache(insns, insns + TRAMPOLINE_SIZE); \ + /* Clear instruction \ + mapping. */ \ + }) +#endif + +/* the cif must already be prep'ed */ + +ffi_status +ffi_prep_closure_loc (ffi_closure* closure, + ffi_cif* cif, + void (*fun)(ffi_cif*,void*,void**,void*), + void *user_data, + void *codeloc) +{ + void (*closure_func)(ffi_closure*) = NULL; + + if (cif->abi == FFI_SYSV) + closure_func = &ffi_closure_SYSV; + else + return FFI_BAD_ABI; + + FFI_INIT_TRAMPOLINE (&closure->tramp[0], \ + closure_func, \ + codeloc); + + closure->cif = cif; + closure->user_data = user_data; + closure->fun = fun; + + return FFI_OK; +} + + diff --git a/src/csky/ffitarget.h b/src/csky/ffitarget.h new file mode 100644 index 0000000..f770aac --- /dev/null +++ b/src/csky/ffitarget.h @@ -0,0 +1,63 @@ +/* -----------------------------------------------------------------*-C-*- + ffitarget.h - Copyright (c) 2012 Anthony Green + Copyright (c) 2010 CodeSourcery + Copyright (c) 1996-2003 Red Hat, Inc. + + Target configuration macros for CSKY. + + 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. + + ----------------------------------------------------------------------- */ + +#ifndef LIBFFI_TARGET_H +#define LIBFFI_TARGET_H + +#ifndef LIBFFI_H +#error "Please do not include ffitarget.h directly into your source. Use ffi.h instead." +#endif + +#ifndef LIBFFI_ASM +typedef unsigned long ffi_arg; +typedef signed long ffi_sarg; + +typedef enum ffi_abi { + FFI_FIRST_ABI = 0, + FFI_SYSV, + FFI_LAST_ABI, + FFI_DEFAULT_ABI = FFI_SYSV, +} ffi_abi; +#endif + +#ifdef __CSKYABIV2__ +#define FFI_ASM_ARGREG_SIZE 16 +#define TRAMPOLINE_SIZE 16 +#define FFI_TRAMPOLINE_SIZE 24 +#else +#define FFI_ASM_ARGREG_SIZE 24 +#define TRAMPOLINE_SIZE 20 +#define FFI_TRAMPOLINE_SIZE 28 +#endif + +/* ---- Definitions for closures ----------------------------------------- */ + +#define FFI_CLOSURES 1 +#define FFI_NATIVE_RAW_API 0 +#endif diff --git a/src/csky/sysv.S b/src/csky/sysv.S new file mode 100644 index 0000000..962a796 --- /dev/null +++ b/src/csky/sysv.S @@ -0,0 +1,371 @@ +/* ----------------------------------------------------------------------- + sysv.S + + CSKY 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. + ----------------------------------------------------------------------- */ + +#define LIBFFI_ASM +#include +#include + +.macro CSKY_FUNC_START name + .text + .align 2 + .globl \name + .type \name, @function + \name: +.endm + +#ifdef __CSKYABIV2__ + + /* + * a0: fn + * a1: &ecif + * a2: cif->bytes + * a3: fig->flags + * sp+0: ecif.rvalue + */ +CSKY_FUNC_START ffi_call_SYSV + /* Save registers */ + .cfi_startproc + subi sp, 28 + .cfi_def_cfa_offset 28 + stw a0, (sp, 0x0) + .cfi_offset 0, -28 + stw a1, (sp, 0x4) + .cfi_offset 1, -24 + stw a2, (sp, 0x8) + .cfi_offset 2, -20 + stw a3, (sp, 0xC) + .cfi_offset 3, -16 + stw l0, (sp, 0x10) + .cfi_offset 4, -12 + stw l1, (sp, 0x14) + .cfi_offset 5, -8 + stw lr, (sp, 0x18) + .cfi_offset 15, -4 + + mov l0, sp + .cfi_def_cfa_register 4 + + /* Make room for all of the new args. */ + subu sp, sp, a2 + + /* Place all of the ffi_prep_args in position */ + mov a0, sp + /* a1 already set */ + + /* Call ffi_prep_args(stack, &ecif) */ + jsri ffi_prep_args + + /* move first 4 parameters in registers */ + ldw a0, (sp, 0x0) + ldw a1, (sp, 0x4) + ldw a2, (sp, 0x8) + ldw a3, (sp, 0xC) + + /* and adjust stack */ + subu lr, l0, sp /* cif->bytes == l0 - sp */ + cmphsi lr, 16 + movi l1, 16 + movt lr, l1 + addu sp, sp, lr + + ldw l1, (l0, 0) /* load fn() in advance */ + + /* call (fn) (...) */ + jsr l1 + + /* Remove the space we pushed for the args */ + mov sp, l0 + + /* Load r2 with the pointer to storage for the return value */ + ldw a2, (sp, 0x1C) + + /* Load r3 with the return type code */ + ldw a3, (sp, 0xC) + + /* If the return value pointer is NULL, assume no return value. */ + cmpnei a2, 0 + bf .Lepilogue + + cmpnei a3, FFI_TYPE_STRUCT + bf .Lepilogue + + /* return INT64 */ + cmpnei a3, FFI_TYPE_SINT64 + bt .Lretint + /* stw a0, (a2, 0x0) at .Lretint */ + stw a1, (a2, 0x4) + +.Lretint: + /* return INT */ + stw a0, (a2, 0x0) + +.Lepilogue: + ldw a0, (sp, 0x0) + ldw a1, (sp, 0x4) + ldw a2, (sp, 0x8) + ldw a3, (sp, 0xC) + ldw l0, (sp, 0x10) + ldw l1, (sp, 0x14) + ldw lr, (sp, 0x18) + addi sp, sp, 28 + rts + .cfi_endproc + .size ffi_call_SYSV, .-ffi_call_SYSV + + + /* + * unsigned int FFI_HIDDEN + * ffi_closure_SYSV_inner (closure, respp, args) + * ffi_closure *closure; + * void **respp; + * void *args; + */ +CSKY_FUNC_START ffi_closure_SYSV + .cfi_startproc + mov a2, sp + addi a1, sp, 16 + subi sp, sp, 24 + .cfi_def_cfa_offset 40 + stw a1, (sp, 0x10) + .cfi_offset 1, -24 + stw lr, (sp, 0x14) + .cfi_offset 15, -20 + stw sp, (sp, 0x8) + addi a1, sp, 8 + jsri ffi_closure_SYSV_inner + ldw a0, (sp, 0x0) + /* + * if FFI_TYPE_SINT64, need a1. + * if FFI_TYPE_INT, ignore a1. + */ + ldw a1, (sp, 0x4) + + ldw lr, (sp, 0x14) + addi sp, sp, 40 + rts + .cfi_endproc + .size ffi_closure_SYSV, .-ffi_closure_SYSV + +CSKY_FUNC_START ffi_csky_trampoline + subi sp, sp, 16 + stw a0, (sp, 0x0) + stw a1, (sp, 0x4) + stw a2, (sp, 0x8) + stw a3, (sp, 0xC) + lrw a0, [.Lctx] + lrw a1, [.Lfun] + jmp a1 +.Lctx: + mov a0, a0 + mov a0, a0 +.Lfun: + + .size ffi_csky_trampoline, .-ffi_csky_trampoline + +CSKY_FUNC_START ffi_csky_cacheflush + mov t0, r7 + movi r7, 123 + trap 0 + mov r7, t0 + rts + + .size ffi_csky_cacheflush, .-ffi_csky_cacheflush + +#else /* !__CSKYABIV2__ */ + + /* + * a0: fn + * a1: &ecif + * a2: cif->bytes + * a3: fig->flags + * a4: ecif.rvalue + */ +CSKY_FUNC_START ffi_call_SYSV + /* Save registers */ + .cfi_startproc + subi sp, 32 + subi sp, 8 + .cfi_def_cfa_offset 40 + stw a0, (sp, 0x0) + .cfi_offset 2, -40 + stw a1, (sp, 0x4) + .cfi_offset 3, -36 + stw a2, (sp, 0x8) + .cfi_offset 4, -32 + stw a3, (sp, 0xC) + .cfi_offset 5, -28 + stw a4, (sp, 0x10) + .cfi_offset 6, -24 + stw a5, (sp, 0x14) + .cfi_offset 7, -20 + stw l0, (sp, 0x18) + .cfi_offset 8, -16 + stw l1, (sp, 0x1C) + .cfi_offset 9, -12 + stw lr, (sp, 0x20) + .cfi_offset 15, -8 + + mov l0, sp + .cfi_def_cfa_register 8 + + /* Make room for all of the new args. */ + subu sp, sp, a2 + + /* Place all of the ffi_prep_args in position */ + mov a0, sp + /* a1 already set */ + + /* Call ffi_prep_args(stack, &ecif) */ + jsri ffi_prep_args + + /* move first 4 parameters in registers */ + ldw a0, (sp, 0x0) + ldw a1, (sp, 0x4) + ldw a2, (sp, 0x8) + ldw a3, (sp, 0xC) + ldw a4, (sp, 0x10) + ldw a5, (sp, 0x14) + + /* and adjust stack */ + mov lr, l0 + subu lr, sp /* cif->bytes == l0 - sp */ + movi l1, 24 + cmphs lr, l1 + movt lr, l1 + addu sp, sp, lr + + ldw l1, (l0, 0) /* load fn() in advance */ + + /* call (fn) (...) */ + jsr l1 + + /* Remove the space we pushed for the args */ + mov sp, l0 + + /* Load r2 with the pointer to storage for the return value */ + ldw a2, (sp, 0x10) + + /* Load r3 with the return type code */ + ldw a3, (sp, 0xC) + + /* If the return value pointer is NULL, assume no return value. */ + cmpnei a2, 0 + bf .Lepilogue + + cmpnei a3, FFI_TYPE_STRUCT + bf .Lepilogue + + /* return INT64 */ + cmpnei a3, FFI_TYPE_SINT64 + bt .Lretint + /* stw a0, (a2, 0x0) at .Lretint */ + stw a1, (a2, 0x4) + +.Lretint: + /* return INT */ + stw a0, (a2, 0x0) + +.Lepilogue: + ldw a0, (sp, 0x0) + ldw a1, (sp, 0x4) + ldw a2, (sp, 0x8) + ldw a3, (sp, 0xC) + ldw a4, (sp, 0x10) + ldw a5, (sp, 0x14) + ldw l0, (sp, 0x18) + ldw l1, (sp, 0x1C) + ldw lr, (sp, 0x20) + addi sp, sp, 32 + addi sp, sp, 8 + rts + .cfi_endproc + + .size ffi_call_SYSV, .-ffi_call_SYSV + + + /* + * unsigned int FFI_HIDDEN + * ffi_closure_SYSV_inner (closure, respp, args) + * ffi_closure *closure; + * void **respp; + * void *args; + */ +CSKY_FUNC_START ffi_closure_SYSV + .cfi_startproc + mov a2, sp + mov a1, sp + addi a1, 24 + subi sp, sp, 24 + .cfi_def_cfa_offset 48 + stw a1, (sp, 0x10) + .cfi_offset 3, -32 + stw lr, (sp, 0x14) + .cfi_offset 15, -28 + stw sp, (sp, 0x8) + mov a1, sp + addi a1, 8 + jsri ffi_closure_SYSV_inner + ldw a0, (sp, 0x0) + /* + * if FFI_TYPE_SINT64, need a1. + * if FFI_TYPE_INT, ignore a1. + */ + ldw a1, (sp, 0x4) + + ldw lr, (sp, 0x14) + addi sp, sp, 24 + addi sp, sp, 24 + rts + .cfi_endproc + + .size ffi_closure_SYSV, .-ffi_closure_SYSV + +CSKY_FUNC_START ffi_csky_trampoline + subi sp, 24 + stw a0, (sp, 0x0) + stw a1, (sp, 0x4) + stw a2, (sp, 0x8) + stw a3, (sp, 0xC) + stw a4, (sp, 0x10) + stw a5, (sp, 0x14) + lrw a0, [.Lctx] + lrw a1, [.Lfun] + jmp a1 +.Lctx: + mov a0, a0 + mov a0, a0 +.Lfun: + + .size ffi_csky_trampoline, .-ffi_csky_trampoline + +CSKY_FUNC_START ffi_csky_cacheflush + lrw r1, 123 + trap 0 + rts + + .size ffi_csky_cacheflush, .-ffi_csky_cacheflush + +#endif /* __CSKYABIV2__ */