diff options
Diffstat (limited to 'usr/klibc/arch/riscv64/sysstub.ph')
-rw-r--r-- | usr/klibc/arch/riscv64/sysstub.ph | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/usr/klibc/arch/riscv64/sysstub.ph b/usr/klibc/arch/riscv64/sysstub.ph new file mode 100644 index 0000000..85c1beb --- /dev/null +++ b/usr/klibc/arch/riscv64/sysstub.ph @@ -0,0 +1,26 @@ +# -*- perl -*- +# +# arch/riscv/sysstub.ph +# +# Script to generate system call stubs +# + +# On RISC-V, most system calls follow the standard convention, with the +# system call number in x17 (a7) and the return value in x10 (a0). + +sub make_sysstub($$$$$@) { + my($outputdir, $fname, $type, $sname, $stype, @args) = @_; + + $stype = $stype || 'common'; + open(OUT, '>', "${outputdir}/${fname}.S"); + print OUT "#include <machine/asm.h>\n"; + print OUT "#include <asm/unistd.h>\n"; + print OUT "\n"; + print OUT "ENTRY(${fname})\n"; + print OUT "\tli\ta7, __NR_${sname}\n"; + print OUT "\tj\t__syscall_${stype}\n"; + print OUT "END(${fname})\n"; + close(OUT); +} + +1; |