diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/s390/s390-32/syscall.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/s390/s390-32/syscall.S | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/syscall.S b/sysdeps/unix/sysv/linux/s390/s390-32/syscall.S index f4f0beb31b..5455ec832d 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-32/syscall.S +++ b/sysdeps/unix/sysv/linux/s390/s390-32/syscall.S @@ -37,15 +37,19 @@ ENTRY (syscall) lr %r4,%r5 /* third parameter */ lr %r5,%r6 /* fourth parameter */ l %r6,192(%r15) /* fifth parameter */ - basr %r7,0 -.L0: ex %r1,.L1-.L0(%r7) /* lsb of R1 is subsituted as SVC number */ - l %r15,0(0,%r15) /* load back chain */ - lm %r6,15,24(%r15) /* load registers */ + basr %r7,0 +0: cl %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: l %r15,0(%r15) /* load back chain */ + lm %r6,15,24(%r15) /* load registers */ lhi %r0,-4095 clr %r2,%r0 /* check R2 for error */ jnl SYSCALL_ERROR_LABEL br %r14 /* return to caller */ -.L1: .word 0x0A00 /* opcode for SVC 0 */ +4: .long 256 PSEUDO_END (syscall) |