diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/s390/s390-64/syscall.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/s390/s390-64/syscall.S | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/syscall.S b/sysdeps/unix/sysv/linux/s390/s390-64/syscall.S index 718d559c3b..5a6bcfc90d 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-64/syscall.S +++ b/sysdeps/unix/sysv/linux/s390/s390-64/syscall.S @@ -37,16 +37,20 @@ ENTRY (syscall) lgr %r4,%r5 /* Third parameter. */ lgr %r5,%r6 /* Fourth parameter. */ lg %r6,320(%r15) /* Fifth parameter. */ - basr %r7,0 -.L0: ex %r1,.L1-.L0(%r7) /* Lsb of R1 is subsituted as SVC number. */ - lg %r15,0(%r15) /* Load back chain. */ + basr %r7,0 +0: clg %r1,4f-0b(%r7) /* svc number < 256? */ + jl 2f +1: svc 0 + j 3f +2: ex %r1,1b-0b(%r7) /* lsb of R1 is subsituted as SVC number */ +3: lg %r15,0(%r15) /* load back chain */ lmg %r6,15,48(%r15) /* Load registers. */ lghi %r0,-4095 clgr %r2,%r0 /* Check R2 for error. */ jgnl SYSCALL_ERROR_LABEL br %r14 /* Return to caller. */ -.L1: .word 0x0A00 /* Opcode for SVC 0. */ +4: .quad 256 PSEUDO_END (syscall) |