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| author | Andreas Krebbel <krebbel@linux.vnet.ibm.com> | 2014-01-07 09:37:31 +0100 |
|---|---|---|
| committer | Andreas Krebbel <krebbel@linux.vnet.ibm.com> | 2014-01-07 09:42:23 +0100 |
| commit | 05d138ef07481b16f1aaee648798cc51182ec65e (patch) | |
| tree | 1b3641bd6db26d0a000aa899b69b7107463b65e5 /sysdeps/unix/sysv/linux/s390/s390-32/swapcontext.S | |
| parent | 93a45ff1ca6d459618bb0cf93580c4b2809a4b61 (diff) | |
| download | glibc-05d138ef07481b16f1aaee648798cc51182ec65e.tar.gz glibc-05d138ef07481b16f1aaee648798cc51182ec65e.tar.xz glibc-05d138ef07481b16f1aaee648798cc51182ec65e.zip | |
S/390: Make ucontext_t extendible.
Diffstat (limited to 'sysdeps/unix/sysv/linux/s390/s390-32/swapcontext.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/s390/s390-32/swapcontext.S | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/swapcontext.S b/sysdeps/unix/sysv/linux/s390/s390-32/swapcontext.S index 6c40c994ef..41ede4b7b2 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-32/swapcontext.S +++ b/sysdeps/unix/sysv/linux/s390/s390-32/swapcontext.S @@ -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. */ lr %r1,%r2 lr %r0,%r3 @@ -62,19 +65,31 @@ ENTRY(__swapcontext) std %f14,SC_FPRS+112(%r1) std %f15,SC_FPRS+120(%r1) - /* Set __swapcontext return value to 0. */ - slr %r2,%r2 - /* Store access registers. */ stam %a0,%a15,SC_ACRS(%r1) + /* Set __swapcontext return value to 0. */ + slr %r2,%r2 + /* Store general purpose registers. */ stm %r0,%r15,SC_GPRS(%r1) - /* sigprocmask (SIG_SETMASK, &sc->sc_mask, NULL). */ - la %r2,SIG_BLOCK + /* Copy uc_flags into the new ucontext_t. */ lr %r5,%r0 - la %r3,SC_MASK(%r5) + l %r2,SC_FLGS(%r5) + st %r2,SC_FLGS(%r1) + + /* Save/restore the upper halfs if necessary. */ + tml %r2,1 /* UCONTEXT_UC_FLAGS_HIGH_GPRS */ + jz 0f + .machine "z900" + .machinemode "zarch_nohighgprs" + stmh %r0,%r15,SC_HIGHGPRS(%r1) + lmh %r0,%r15,SC_HIGHGPRS(%r5) + + /* rt_sigprocmask (SIG_SETMASK, &sc->sc_mask, NULL, sigsetsize). */ +0: la %r2,SIG_BLOCK + la %r3,SC_MASK(%r5) slr %r4,%r4 lhi %r5,_NSIG8 svc SYS_ify(rt_sigprocmask) |