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musl/crt/rcrt1.c

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add rcrt1 start file for fully static-linked PIE static-linked PIE files need startup code to relocate themselves, much like the dynamic linker does. rcrt1.c reuses the code in dlstart.c, stage 1 of the dynamic linker, which in turn reuses crt_arch.h, to achieve static PIE with no new code. only relative relocations are supported. existing toolchains that don't yet support static PIE directly can be repurposed by passing "-shared -Wl,-Bstatic -Wl,-Bsymbolic" instead of "-static -pie" and substituting rcrt1.o in place of crt1.o. all libraries being linked must be built as PIC/PIE; TEXTRELs are not supported at this time.
2015-05-26 03:37:41 -04:00
#define SHARED
#define START "_start"
#define _dlstart_c _start_c
#include "../src/ldso/dlstart.c"
int main();
void _init() __attribute__((weak));
void _fini() __attribute__((weak));
_Noreturn int __libc_start_main(int (*)(), int, char **,
void (*)(), void(*)(), void(*)());
_Noreturn void __dls2(unsigned char *base, size_t *sp)
{
__libc_start_main(main, *sp, (void *)(sp+1), _init, _fini, 0);
}
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