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git://git.musl-libc.org/musl
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c5e34dabbb
the only immediate effect of this commit is enabling PIE support on some archs that did not previously have any Scrt1.s, since the existing asm files for crt1 override this C code. so some of the crt_arch.h files committed are only there for the sake of documenting what their archs "would do" if they used the new C-based crt1. the expectation is that new archs should use this new system rather than using heavy asm for crt1. aside from being easier and less error-prone, it also ensures that PIE support is available immediately (since Scrt1.o is generated from the same C source, using -fPIC) rather than having to be added as an afterthought in the porting process.
22 lines
391 B
C
22 lines
391 B
C
__asm__("\n\
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.set push\n\
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.set noreorder\n\
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.global __start\n\
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.global _start\n\
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.type __start, @function\n\
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.type _start, @function\n\
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__start:\n\
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_start:\n\
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bal 1f \n\
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move $fp, $0 \n\
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2: .gpword 2b \n\
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1: lw $gp, 0($ra) \n\
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subu $gp, $ra, $gp \n\
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move $4, $sp \n\
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subu $sp, $sp, 16 \n\
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and $sp, $sp, -8 \n\
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lw $25, %call16(__cstart)($gp) \n\
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jalr $25 \n\
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nop \n\
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.set pop");
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