133 lines
4.9 KiB
C
133 lines
4.9 KiB
C
/*
|
|
* This file is part of the MicroPython project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2013-2017 Damien P. George
|
|
*
|
|
* 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"
|
|
|
|
#if MICROPY_NLR_X64
|
|
|
|
#undef nlr_push
|
|
|
|
// x86-64 callee-save registers are:
|
|
// rbx, rbp, rsp, r12, r13, r14, r15
|
|
|
|
__attribute__((used)) unsigned int nlr_push_tail(nlr_buf_t *nlr);
|
|
|
|
#if !MICROPY_NLR_OS_WINDOWS
|
|
#if defined(__clang__) || (defined(__GNUC__) && __GNUC__ >= 8)
|
|
#define USE_NAKED 1
|
|
#else
|
|
// On older gcc the equivalent here is to force omit-frame-pointer
|
|
__attribute__((optimize("omit-frame-pointer")))
|
|
#endif
|
|
#endif
|
|
|
|
#if !defined(USE_NAKED)
|
|
#define USE_NAKED 0
|
|
#endif
|
|
|
|
#if USE_NAKED
|
|
// nlr_push prelude should never push frame pointer register ebp onto the stack
|
|
__attribute__((naked))
|
|
#endif
|
|
unsigned int nlr_push(nlr_buf_t *nlr) {
|
|
#if !USE_NAKED
|
|
(void)nlr;
|
|
#endif
|
|
|
|
#if MICROPY_NLR_OS_WINDOWS
|
|
|
|
__asm volatile (
|
|
"movq (%rsp), %rax \n" // load return %rip
|
|
"movq %rax, 16(%rcx) \n" // store %rip into nlr_buf
|
|
"movq %rbp, 24(%rcx) \n" // store %rbp into nlr_buf
|
|
"movq %rsp, 32(%rcx) \n" // store %rsp into nlr_buf
|
|
"movq %rbx, 40(%rcx) \n" // store %rbx into nlr_buf
|
|
"movq %r12, 48(%rcx) \n" // store %r12 into nlr_buf
|
|
"movq %r13, 56(%rcx) \n" // store %r13 into nlr_buf
|
|
"movq %r14, 64(%rcx) \n" // store %r14 into nlr_buf
|
|
"movq %r15, 72(%rcx) \n" // store %r15 into nlr_buf
|
|
"movq %rdi, 80(%rcx) \n" // store %rdr into nlr_buf
|
|
"movq %rsi, 88(%rcx) \n" // store %rsi into nlr_buf
|
|
"jmp nlr_push_tail \n" // do the rest in C
|
|
);
|
|
|
|
#else
|
|
|
|
__asm volatile (
|
|
"movq (%rsp), %rax \n" // load return %rip
|
|
"movq %rax, 16(%rdi) \n" // store %rip into nlr_buf
|
|
"movq %rbp, 24(%rdi) \n" // store %rbp into nlr_buf
|
|
"movq %rsp, 32(%rdi) \n" // store %rsp into nlr_buf
|
|
"movq %rbx, 40(%rdi) \n" // store %rbx into nlr_buf
|
|
"movq %r12, 48(%rdi) \n" // store %r12 into nlr_buf
|
|
"movq %r13, 56(%rdi) \n" // store %r13 into nlr_buf
|
|
"movq %r14, 64(%rdi) \n" // store %r14 into nlr_buf
|
|
"movq %r15, 72(%rdi) \n" // store %r15 into nlr_buf
|
|
#if defined(__APPLE__) && defined(__MACH__)
|
|
"jmp _nlr_push_tail \n" // do the rest in C
|
|
#else
|
|
"jmp nlr_push_tail \n" // do the rest in C
|
|
#endif
|
|
);
|
|
|
|
#endif
|
|
|
|
#if !USE_NAKED
|
|
return 0; // needed to silence compiler warning
|
|
#endif
|
|
}
|
|
|
|
NORETURN void nlr_jump(void *val) {
|
|
MP_NLR_JUMP_HEAD(val, top)
|
|
|
|
__asm volatile (
|
|
"movq %0, %%rcx \n" // %rcx points to nlr_buf
|
|
#if MICROPY_NLR_OS_WINDOWS
|
|
"movq 88(%%rcx), %%rsi \n" // load saved %rsi
|
|
"movq 80(%%rcx), %%rdi \n" // load saved %rdi
|
|
#endif
|
|
"movq 72(%%rcx), %%r15 \n" // load saved %r15
|
|
"movq 64(%%rcx), %%r14 \n" // load saved %r14
|
|
"movq 56(%%rcx), %%r13 \n" // load saved %r13
|
|
"movq 48(%%rcx), %%r12 \n" // load saved %r12
|
|
"movq 40(%%rcx), %%rbx \n" // load saved %rbx
|
|
"movq 32(%%rcx), %%rsp \n" // load saved %rsp
|
|
"movq 24(%%rcx), %%rbp \n" // load saved %rbp
|
|
"movq 16(%%rcx), %%rax \n" // load saved %rip
|
|
"movq %%rax, (%%rsp) \n" // store saved %rip to stack
|
|
"xorq %%rax, %%rax \n" // clear return register
|
|
"inc %%al \n" // increase to make 1, non-local return
|
|
"ret \n" // return
|
|
: // output operands
|
|
: "r" (top) // input operands
|
|
: // clobbered registers
|
|
);
|
|
|
|
MP_UNREACHABLE
|
|
}
|
|
|
|
#endif // MICROPY_NLR_X64
|