diff options
| -rw-r--r-- | py/nlr.h | 4 | ||||
| -rw-r--r-- | py/nlraarch64.c | 74 | ||||
| -rw-r--r-- | py/py.mk | 1 |
3 files changed, 79 insertions, 0 deletions
@@ -39,6 +39,7 @@ #define MICROPY_NLR_NUM_REGS_X64_WIN (10) #define MICROPY_NLR_NUM_REGS_ARM_THUMB (10) #define MICROPY_NLR_NUM_REGS_ARM_THUMB_FP (10 + 6) +#define MICROPY_NLR_NUM_REGS_AARCH64 (13) #define MICROPY_NLR_NUM_REGS_XTENSA (10) #define MICROPY_NLR_NUM_REGS_XTENSAWIN (17) @@ -72,6 +73,9 @@ // so only save/restore those as an optimisation. #define MICROPY_NLR_NUM_REGS (MICROPY_NLR_NUM_REGS_ARM_THUMB_FP) #endif +#elif defined(__aarch64__) + #define MICROPY_NLR_AARCH64 (1) + #define MICROPY_NLR_NUM_REGS (MICROPY_NLR_NUM_REGS_AARCH64) #elif defined(__xtensa__) #define MICROPY_NLR_XTENSA (1) #define MICROPY_NLR_NUM_REGS (MICROPY_NLR_NUM_REGS_XTENSA) diff --git a/py/nlraarch64.c b/py/nlraarch64.c new file mode 100644 index 000000000..2df0dc9c8 --- /dev/null +++ b/py/nlraarch64.c @@ -0,0 +1,74 @@ +/* + * This file is part of the MicroPython project, http://micropython.org/ + * + * The MIT License (MIT) + * + * Copyright (c) 2021 Yonatan Goldschmidt + * + * 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 "py/mpstate.h" // needed for NLR defs + +#if MICROPY_NLR_AARCH64 + +// AArch64 callee-saved registers are x19-x29. +// https://en.wikipedia.org/wiki/Calling_convention#ARM_(A64) + +// Implemented purely as inline assembly; inside a function, we have to deal with undoing the prologue, restoring +// SP and LR. This way, we don't. +__asm( + "nlr_push: \n" + ".global nlr_push \n" + "mov x9, sp \n" + "stp lr, x9, [x0, #16]\n" // 16 == offsetof(nlr_buf_t, regs) + "stp x19, x20, [x0, #32]\n" + "stp x21, x22, [x0, #48]\n" + "stp x23, x24, [x0, #64]\n" + "stp x25, x26, [x0, #80]\n" + "stp x27, x28, [x0, #96]\n" + "str x29, [x0, #112]\n" + "b nlr_push_tail \n" // do the rest in C + ); + +NORETURN void nlr_jump(void *val) { + MP_NLR_JUMP_HEAD(val, top) + + MP_STATIC_ASSERT(offsetof(nlr_buf_t, regs) == 16); // asm assumes it + + __asm volatile ( + "ldr x29, [%0, #112]\n" + "ldp x27, x28, [%0, #96]\n" + "ldp x25, x26, [%0, #80]\n" + "ldp x23, x24, [%0, #64]\n" + "ldp x21, x22, [%0, #48]\n" + "ldp x19, x20, [%0, #32]\n" + "ldp lr, x9, [%0, #16]\n" // 16 == offsetof(nlr_buf_t, regs) + "mov sp, x9 \n" + "mov x0, #1 \n" // non-local return + "ret \n" + : + : "r" (top) + : + ); + + MP_UNREACHABLE +} + +#endif // MICROPY_NLR_AARCH64 @@ -57,6 +57,7 @@ PY_CORE_O_BASENAME = $(addprefix py/,\ nlrx86.o \ nlrx64.o \ nlrthumb.o \ + nlraarch64.o \ nlrpowerpc.o \ nlrxtensa.o \ nlrsetjmp.o \ |