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| author | Catalin Marinas <catalin.marinas@arm.com> | 2014-04-06 23:04:12 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2014-05-09 15:47:47 +0100 |
| commit | 9141300a5884b57cea6d32c4e3fd16a337cfc99a (patch) | |
| tree | d717d0ae66c7458c922b885c689b9c192b0f4083 /arch/arm64/kernel/traps.c | |
| parent | 6400111399e16a535231ebd76389c894ea1837ff (diff) | |
| download | linux-stable-9141300a5884b57cea6d32c4e3fd16a337cfc99a.tar.gz linux-stable-9141300a5884b57cea6d32c4e3fd16a337cfc99a.tar.bz2 linux-stable-9141300a5884b57cea6d32c4e3fd16a337cfc99a.zip | |
arm64: Provide read/write fault information in compat signal handlers
For AArch32, bit 11 (WnR) of the FSR/ESR register is set when the fault
was caused by a write access and applications like Qemu rely on such
information being provided in sigcontext. This patch introduces the
ESR_EL1 tracking for the arm64 kernel faults and sets bit 11 accordingly
in compat sigcontext.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/kernel/traps.c')
| -rw-r--r-- | arch/arm64/kernel/traps.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c index 7ffadddb645d..c43cfa9b8304 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -251,10 +251,13 @@ void die(const char *str, struct pt_regs *regs, int err) void arm64_notify_die(const char *str, struct pt_regs *regs, struct siginfo *info, int err) { - if (user_mode(regs)) + if (user_mode(regs)) { + current->thread.fault_address = 0; + current->thread.fault_code = err; force_sig_info(info->si_signo, info, current); - else + } else { die(str, regs, err); + } } asmlinkage void __exception do_undefinstr(struct pt_regs *regs) |