d0p1/ack
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Call proper Linux system calls proper-like.

Browse source
This commit is contained in:
David Given 2018-09-09 18:57:12 +02:00
parent bb15c03339
commit f3bc9ef92a
1 changed files with 16 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

16
plat/linuxmips/libsys/_syscall.s
View file

@ -14,5 +14,21 @@
.define __syscall .define __syscall
__syscall: __syscall:
lw r2, 0(sp) ! syscall number
addiu r2, r2, 4000 ! MIPS uses non-standard numbers
lw r4, 4(sp)
lw r5, 8(sp)
lw r6, 12(sp)
syscall 0 syscall 0
beq r7, zero, exit ! branch on success
nop
/* The result (in r2) is the errno. */
lui at, ha16[_errno]
sw r2, lo16[_errno] (at)
li r2, -1
exit:
jr ra
nop