2011-10-12 17:45:17 -05:00
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.text
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// upcall_call_c_stack(void (*fn)(), void *new_esp)
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//
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// Note that we could use |enter| and |leave| but the manuals tell me they're
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// slower.
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#if defined(__APPLE__) || defined(_WIN32)
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.globl _upcall_call_c_stack
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_upcall_call_c_stack:
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#else
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.globl upcall_call_c_stack
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upcall_call_c_stack:
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#endif
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2011-10-13 19:11:28 -05:00
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push %rbp
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mov %rsp,%rbp // save rsp
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mov %rsi,%rsp // switch stack
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call *%rdi
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mov %rbp,%rsp // would like to use "leave" but it's slower
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pop %rbp
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2011-10-12 17:45:17 -05:00
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ret
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