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With -Wmissing-prototypes the compiler will warn about non-static functions which don't have a prototype defined. This warning doesn't make much sense for nolibc itself but for user code it is still useful. To pacify the compiler add prototypes next to the function definitions, similar to how it is handled elsewhere in the kernel. Acked-by: Willy Tarreau <w@1wt.eu> Link: https://lore.kernel.org/r/20250123-nolibc-prototype-v1-1-e1afc5c1999a@weissschuh.net Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
87 lines
2.4 KiB
C
87 lines
2.4 KiB
C
/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
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/*
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* C Run Time support for NOLIBC
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* Copyright (C) 2023 Zhangjin Wu <falcon@tinylab.org>
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*/
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#ifndef _NOLIBC_CRT_H
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#define _NOLIBC_CRT_H
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char **environ __attribute__((weak));
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const unsigned long *_auxv __attribute__((weak));
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void _start(void);
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static void __stack_chk_init(void);
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static void exit(int);
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extern void (*const __preinit_array_start[])(int, char **, char**) __attribute__((weak));
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extern void (*const __preinit_array_end[])(int, char **, char**) __attribute__((weak));
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extern void (*const __init_array_start[])(int, char **, char**) __attribute__((weak));
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extern void (*const __init_array_end[])(int, char **, char**) __attribute__((weak));
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extern void (*const __fini_array_start[])(void) __attribute__((weak));
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extern void (*const __fini_array_end[])(void) __attribute__((weak));
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void _start_c(long *sp);
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__attribute__((weak,used))
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void _start_c(long *sp)
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{
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long argc;
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char **argv;
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char **envp;
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int exitcode;
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void (* const *ctor_func)(int, char **, char **);
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void (* const *dtor_func)(void);
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const unsigned long *auxv;
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/* silence potential warning: conflicting types for 'main' */
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int _nolibc_main(int, char **, char **) __asm__ ("main");
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/* initialize stack protector */
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__stack_chk_init();
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/*
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* sp : argc <-- argument count, required by main()
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* argv: argv[0] <-- argument vector, required by main()
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* argv[1]
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* ...
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* argv[argc-1]
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* null
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* environ: environ[0] <-- environment variables, required by main() and getenv()
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* environ[1]
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* ...
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* null
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* _auxv: _auxv[0] <-- auxiliary vector, required by getauxval()
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* _auxv[1]
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* ...
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* null
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*/
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/* assign argc and argv */
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argc = *sp;
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argv = (void *)(sp + 1);
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/* find environ */
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environ = envp = argv + argc + 1;
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/* find _auxv */
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for (auxv = (void *)envp; *auxv++;)
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;
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_auxv = auxv;
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for (ctor_func = __preinit_array_start; ctor_func < __preinit_array_end; ctor_func++)
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(*ctor_func)(argc, argv, envp);
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for (ctor_func = __init_array_start; ctor_func < __init_array_end; ctor_func++)
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(*ctor_func)(argc, argv, envp);
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/* go to application */
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exitcode = _nolibc_main(argc, argv, envp);
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for (dtor_func = __fini_array_end; dtor_func > __fini_array_start;)
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(*--dtor_func)();
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exit(exitcode);
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}
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#endif /* _NOLIBC_CRT_H */
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