Hojun-Cho
1657bdeda3
C bootstrap (phases 0-9):
cmd/wwc, cmd/6c, cmd/6a, cmd/6l, cmd/ww, rt, lib/*.
ww-side self-host (phase 10):
selfhost/cmd/wwc — ww-cgen frontend; bootstrap fixed point.
selfhost/cmd/6a — assembler; byte-identical to C 6a (test 991).
selfhost/cmd/6l — linker w/ archive (.a) support; byte-identical
to C 6l (test 992).
selfhost/cmd/ww — driver (build/run/version); byte-identical to
C ww (test 993).
make test: 15/15. make bootstrap: ww2.s == ww3.s, ww2.o == ww3.o,
ww2 == ww3 byte-identical, with the full ww-tooled chain.
18 lines
408 B
ArmAsm
18 lines
408 B
ArmAsm
// rt/abort.s — write a string to stderr and exit(1).
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//
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// Args (SysV str-by-value): DI = msg.ptr, SI = msg.len.
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// We never return.
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TEXT rt_abort,$0
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// reorder args for the write syscall: rdi=fd, rsi=ptr, rdx=len.
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MOVQ SI, DX // DX = len
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MOVQ DI, SI // SI = ptr
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MOVQ $2, DI // DI = stderr
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MOVQ $1, AX // AX = sys_write
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SYSCALL
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// exit(1)
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MOVQ $1, DI
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MOVQ $60, AX // sys_exit
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SYSCALL
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RET
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