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cd09ab7c74
When in the virtual environment, have brki 8 trigger libgloss syscalls like other ports. This also matches the ABI that Linux uses for its syscalls (ignoring the syscall table differences).
48 lines
753 B
PHP
48 lines
753 B
PHP
# MACRO: system_call
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# Make a libgloss/Linux system call
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.macro system_call nr:req
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addi r12, r0, \nr;
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brki r14, 8;
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.endm
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# MACRO: exit
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.macro exit nr:req
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addi r3, r0, \nr;
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bri 0;
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.endm
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# MACRO: pass
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# Write 'pass' to stdout and quit
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.macro pass
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write 1, 1f, 5
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exit 0
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.data
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1: .asciz "pass\n"
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.endm
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# MACRO: fail
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# Write 'fail' to stdout and quit
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.macro fail
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write 1, 1f, 5
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exit 1
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.data
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1: .asciz "fail\n"
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.endm
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# MACRO: start
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# All assembler tests should start with a call to "start"
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.macro start
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.text
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.global _start
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_start:
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.endm
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# MACRO: write
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# Just like the write() C function; uses system calls
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.macro write fd:req, buf:req, count:req
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addi r5, r0, \fd;
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addi r6, r0, \buf;
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addi r7, r0, \count;
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system_call 5
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.endm
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