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| author |   Vineet Gupta <vgupta@synopsys.com> | 2017-12-20 12:37:54 -0800 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2017-12-20 15:16:18 -0800 |
| commit | f5a16b93e6291ba1f65f55647cb4cd8d75ed1b35 (patch) | |
| tree | 4c6243cc717af027d95dff55542b05b067ef16a8 /arch/arc/kernel/troubleshoot.c | |
| parent | ARC: uaccess: dont use "l" gcc inline asm constraint modifier (diff) | |
| download | linux-dev-f5a16b93e6291ba1f65f55647cb4cd8d75ed1b35.tar.xz linux-dev-f5a16b93e6291ba1f65f55647cb4cd8d75ed1b35.zip | |
ARC: handle gcc generated __builtin_trap()
gcc toggle -fisolate-erroneous-paths-dereference (default at -O2
onwards) isolates faulty code paths such as null pointer access, divide
by zero etc by emitting __builtin_trap()
Newer ARC gcc generates TRAP_S 5 instruction which needs to be handled
and treated like any other unexpected exception
- user mode : task terminated with a SEGV
- kernel mode: die() called after register and stack dump
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/kernel/troubleshoot.c')
| -rw-r--r-- | arch/arc/kernel/troubleshoot.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arc/kernel/troubleshoot.c b/arch/arc/kernel/troubleshoot.c index 7d8c1d6c2f60..6e9a0a9a6a04 100644 --- a/arch/arc/kernel/troubleshoot.c +++ b/arch/arc/kernel/troubleshoot.c @@ -163,6 +163,9 @@ static void show_ecr_verbose(struct pt_regs *regs) else pr_cont("Bus Error, check PRM\n"); #endif + } else if (vec == ECR_V_TRAP) { + if (regs->ecr_param == 5) + pr_cont("gcc generated __builtin_trap\n"); } else { pr_cont("Check Programmer's Manual\n"); } |