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build5/epsilon-master/python/src/py/nlrx64.c 4.41 KB
6663b6c9   adorian   projet complet av...
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  /*
   * 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);
  
  unsigned int nlr_push(nlr_buf_t *nlr) {
      (void)nlr;
  
      #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 (
      #if defined(__APPLE__) || defined(__MACH__)
      "pop    %rbp                \n" // undo function's prelude
      #endif
      "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
  
      return 0; // needed to silence compiler warning
  }
  
  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 %rdr
      #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
      );
  
      for (;;); // needed to silence compiler warning
  }
  
  #endif // MICROPY_NLR_X64