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| author | Matthew Chapman <matthewc@hp.com> | 2005-06-21 16:19:20 -0700 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2005-06-21 16:19:20 -0700 |
| commit | 4ea78729b8dbfc400fe165a57b90a394a7275a54 (patch) | |
| tree | cc8d7def737ca5a4189481466d1e4164eef98313 /arch/ia64/kernel/signal.c | |
| parent | 7b404b3459db1326bbdc7085edb1f58b98da5826 (diff) | |
| download | linux-4ea78729b8dbfc400fe165a57b90a394a7275a54.tar.gz linux-4ea78729b8dbfc400fe165a57b90a394a7275a54.tar.bz2 linux-4ea78729b8dbfc400fe165a57b90a394a7275a54.zip | |
[IA64] ptrace and restore_sigcontext() allow ar.rsc.pl==0
This patch fixes handling of accesses to ar.rsc via ptrace & restore_sigcontext
[With Thanks to Chris Wright for noticing the restore_sigcontext path]
Signed-off-by: Matthew Chapman <matthewc@hp.com>
Acked-by: David Mosberger <davidm@hpl.hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/kernel/signal.c')
| -rw-r--r-- | arch/ia64/kernel/signal.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/ia64/kernel/signal.c b/arch/ia64/kernel/signal.c index 499b7e5317cf..edd9f07860b2 100644 --- a/arch/ia64/kernel/signal.c +++ b/arch/ia64/kernel/signal.c @@ -94,7 +94,7 @@ sys_sigaltstack (const stack_t __user *uss, stack_t __user *uoss, long arg2, static long restore_sigcontext (struct sigcontext __user *sc, struct sigscratch *scr) { - unsigned long ip, flags, nat, um, cfm; + unsigned long ip, flags, nat, um, cfm, rsc; long err; /* Always make any pending restarted system calls return -EINTR */ @@ -106,7 +106,7 @@ restore_sigcontext (struct sigcontext __user *sc, struct sigscratch *scr) err |= __get_user(ip, &sc->sc_ip); /* instruction pointer */ err |= __get_user(cfm, &sc->sc_cfm); err |= __get_user(um, &sc->sc_um); /* user mask */ - err |= __get_user(scr->pt.ar_rsc, &sc->sc_ar_rsc); + err |= __get_user(rsc, &sc->sc_ar_rsc); err |= __get_user(scr->pt.ar_unat, &sc->sc_ar_unat); err |= __get_user(scr->pt.ar_fpsr, &sc->sc_ar_fpsr); err |= __get_user(scr->pt.ar_pfs, &sc->sc_ar_pfs); @@ -119,6 +119,7 @@ restore_sigcontext (struct sigcontext __user *sc, struct sigscratch *scr) err |= __copy_from_user(&scr->pt.r15, &sc->sc_gr[15], 8); /* r15 */ scr->pt.cr_ifs = cfm | (1UL << 63); + scr->pt.ar_rsc = rsc | (3 << 2); /* force PL3 */ /* establish new instruction pointer: */ scr->pt.cr_iip = ip & ~0x3UL; |