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b184b6ae53
The number of registers used should be 10, not 12, to match the assembly code in nlrx64.c. With this change the 64bit mingw builds don't need to use the setjmp implementation, and this fixes miscellaneous crashes and assertion failures as reported in #1751 for instance. To avoid mistakes in the future where something gcc-related for Windows only gets fixed for one particular compiler/environment combination, make use of a MICROPY_NLR_OS_WINDOWS macro. To make sure everything nlr-related is now ok when built with gcc this has been verified with: - unix port built with gcc on Cygwin (i686-pc-cygwin-gcc and x86_64-pc-cygwin-gcc, version 6.4.0) - windows port built with mingw-w64's gcc from Cygwin (i686-w64-mingw32-gcc and x86_64-w64-mingw32-gcc, version 6.4.0) and MSYS2 (like the ones on Cygwin but version 7.2.0)
91 lines
3.5 KiB
C
91 lines
3.5 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013-2017 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "py/mpstate.h"
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#if MICROPY_NLR_X86
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#undef nlr_push
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// For reference, x86 callee save regs are:
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// ebx, esi, edi, ebp, esp, eip
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#if MICROPY_NLR_OS_WINDOWS
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unsigned int nlr_push_tail(nlr_buf_t *nlr) asm("nlr_push_tail");
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#else
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__attribute__((used)) unsigned int nlr_push_tail(nlr_buf_t *nlr);
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#endif
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unsigned int nlr_push(nlr_buf_t *nlr) {
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(void)nlr;
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__asm volatile (
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// Check for Zephyr, which uses a different calling convention
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// by default.
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// TODE: Better support for various x86 calling conventions
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// (unfortunately, __attribute__((naked)) is not supported on x86).
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#if !(defined(__ZEPHYR__) || defined(__ANDROID__))
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"pop %ebp \n" // undo function's prelude
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#endif
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"mov 4(%esp), %edx \n" // load nlr_buf
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"mov (%esp), %eax \n" // load return %eip
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"mov %eax, 8(%edx) \n" // store %eip into nlr_buf
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"mov %ebp, 12(%edx) \n" // store %ebp into nlr_buf
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"mov %esp, 16(%edx) \n" // store %esp into nlr_buf
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"mov %ebx, 20(%edx) \n" // store %ebx into nlr_buf
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"mov %edi, 24(%edx) \n" // store %edi into nlr_buf
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"mov %esi, 28(%edx) \n" // store %esi into nlr_buf
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"jmp nlr_push_tail \n" // do the rest in C
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);
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return 0; // needed to silence compiler warning
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}
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NORETURN void nlr_jump(void *val) {
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MP_NLR_JUMP_HEAD(val, top)
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__asm volatile (
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"mov %0, %%edx \n" // %edx points to nlr_buf
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"mov 28(%%edx), %%esi \n" // load saved %esi
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"mov 24(%%edx), %%edi \n" // load saved %edi
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"mov 20(%%edx), %%ebx \n" // load saved %ebx
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"mov 16(%%edx), %%esp \n" // load saved %esp
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"mov 12(%%edx), %%ebp \n" // load saved %ebp
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"mov 8(%%edx), %%eax \n" // load saved %eip
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"mov %%eax, (%%esp) \n" // store saved %eip to stack
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"xor %%eax, %%eax \n" // clear return register
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"inc %%al \n" // increase to make 1, non-local return
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"ret \n" // return
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: // output operands
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: "r"(top) // input operands
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: // clobbered registers
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);
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for (;;); // needed to silence compiler warning
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}
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#endif // MICROPY_NLR_X86
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