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51 lines
1,012 B
ArmAsm
51 lines
1,012 B
ArmAsm
#include <sys.s>
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#include <sys/regdef.h>
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/* #include <sys/asm.h> */
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/*
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Kernel syscall interface:
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Input:
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v0 syscall number
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Output:
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This macro is similar to SYSCALL in sys/syscall.h, but not completely.
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There's room for optimization, if we assume this will continue to
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be assembled as one file.
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Compile with -DPIC for pic code.
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*/
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#ifdef PIC
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#define PICOPT .option pic2
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#else
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#define PICOPT
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#endif
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#define YSYSCALL(x) \
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PICOPT; \
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.globl machdep_sys_##x; \
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.ent machdep_sys_##x, 0; \
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machdep_sys_##x:; \
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.frame sp,0,ra; \
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.set noreorder; \
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li v0, SYS_##x; \
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syscall; \
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bne a3, zero, 1b; \
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nop; \
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j ra; \
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nop; \
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.end machdep_sys_##x
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/* ==========================================================================
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* error code for all syscalls. The error value is returned as the negative
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* of the errno value.
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*/
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1:
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subu v0,zero,v0;
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j ra;
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#define XSYSCALL(x) YSYSCALL(x)
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XSYSCALL(SYSCALL_NAME)
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