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Ensure 32 bytes of stack are reserved on 64-bit Windows targets

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* lightening/x86.c (reset_abi_arg_iterator): Reserve 32 stack bytes on
  64-bit Windows systems, in accordance with ABI.  Thanks a million to
  Charles Stanhope for the patch and to Mike Gran for testing!
This commit is contained in:
Andy Wingo 2020-02-17 22:01:14 +01:00
parent 2db2b12e85
commit a96c0188f1
1 changed files with 4 additions and 0 deletions
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4
lightening/x86.c
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@ -328,6 +328,10 @@ reset_abi_arg_iterator(struct abi_arg_iterator *iter, size_t argc,
memset(iter, 0, sizeof *iter);
iter->argc = argc;
iter->args = args;
#if __CYGWIN__ && __X64
// Reserve slots on the stack for 4 register parameters (8 bytes each).
iter->stack_size = 32;
#endif
}
static void