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Viewing changes to libc-bottom-half/crt/crt1.c

  • Committer: mmach
  • Date: 2023-09-12 15:53:36 UTC
  • Revision ID: netbit73@gmail.com-20230912155336-s1r5z5xnszz99zzo
0.0~git20230113.4362b18

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libc-bottom-half/crt/crt1.c
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#include <wasi/api.h>
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extern void __wasm_call_ctors(void);
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extern int __original_main(void);
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extern void __wasm_call_dtors(void);
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__attribute__((export_name("_start")))
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void _start(void) {
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    // The linker synthesizes this to call constructors.
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    __wasm_call_ctors();
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    // Call `__original_main` which will either be the application's zero-argument
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    // `__original_main` function or a libc routine which calls `__main_void`.
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    // TODO: Call `main` directly once we no longer have to support old compilers.
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    int r = __original_main();
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    // Call atexit functions, destructors, stdio cleanup, etc.
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    __wasm_call_dtors();
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    // If main exited successfully, just return, otherwise call
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    // `__wasi_proc_exit`.
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    if (r != 0) {
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        __wasi_proc_exit(r);
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    }
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}
 
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// We compile a plain crt1.o for toolchain compatibility, but it's
 
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// identical to crt1-command.o.
 
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#include "crt1-command.c"