diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/s390/s390-64/swapcontext.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/s390/s390-64/swapcontext.S | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/swapcontext.S b/sysdeps/unix/sysv/linux/s390/s390-64/swapcontext.S index a626660744..ac74b6bc08 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-64/swapcontext.S +++ b/sysdeps/unix/sysv/linux/s390/s390-64/swapcontext.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002-2013 Free Software Foundation, Inc. +/* Copyright (C) 2002-2014 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). @@ -33,6 +33,9 @@ other than the PRESERVED state. */ ENTRY(__swapcontext) + /* While not part of the ABI a system call never clobbers r0 + or r1. So keeping the values here while calling + rt_sigprocmask is ok. */ lgr %r1,%r2 lgr %r0,%r3 @@ -62,21 +65,25 @@ ENTRY(__swapcontext) std %f14,SC_FPRS+112(%r1) std %f15,SC_FPRS+120(%r1) - /* Set __swapcontext return value to 0. */ - slgr %r2,%r2 - /* Store access registers. */ stam %a0,%a15,SC_ACRS(%r1) + /* Set __swapcontext return value to 0. */ + slgr %r2,%r2 + /* Store general purpose registers. */ stmg %r0,%r15,SC_GPRS(%r1) - /* sigprocmask (SIG_SETMASK, &sc->sc_mask, NULL). */ - la %r2,SIG_BLOCK + /* Copy uc_flags into the new ucontext_t. */ lgr %r5,%r0 + lg %r2,SC_FLGS(%r5) + stg %r2,SC_FLGS(%r1) + + /* rt_sigprocmask (SIG_SETMASK, &sc->sc_mask, NULL, sigsetsize). */ + la %r2,SIG_BLOCK la %r3,SC_MASK(%r5) - lghi %r5,_NSIG8 slgr %r4,%r4 + lghi %r5,_NSIG8 svc SYS_ify(rt_sigprocmask) /* Load fpu context. */ |