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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-04-06 09:55:50 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-04-06 09:55:50 -0700 |
| commit | f183d269cc6c64481b47ecbf9d3aff128dc0978c (patch) | |
| tree | 3897411e0d277ac966c996c9acaf17f8252df027 /arch/csky/mm/fault.c | |
| parent | b6ff10700d1bf33c4323d34eca1e80bc8a69f9f5 (diff) | |
| parent | aefd9461d34a1b0a2acad0750c43216c1c27b9d4 (diff) | |
Merge tag 'csky-for-linus-5.7-rc1' of git://github.com/c-sky/csky-linux
Pull csky updates from Guo Ren:
- Add kproobes/uprobes support
- Add lockdep, rseq, gcov support
- Fixup init_fpu
- Fixup ftrace_modify deadlock
- Fixup speculative execution on IO area
* tag 'csky-for-linus-5.7-rc1' of git://github.com/c-sky/csky-linux:
csky: Fixup cpu speculative execution to IO area
csky: Add uprobes support
csky: Add kprobes supported
csky: Enable LOCKDEP_SUPPORT
csky: Enable the gcov function
csky: Fixup get wrong psr value from phyical reg
csky/ftrace: Fixup ftrace_modify_code deadlock without CPU_HAS_ICACHE_INS
csky: Implement ftrace with regs
csky: Add support for restartable sequence
csky: Implement ptrace regs and stack API
csky: Fixup init_fpu compile warning with __init
Diffstat (limited to 'arch/csky/mm/fault.c')
| -rw-r--r-- | arch/csky/mm/fault.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/csky/mm/fault.c b/arch/csky/mm/fault.c index f76618b630f9..d3c61b83e195 100644 --- a/arch/csky/mm/fault.c +++ b/arch/csky/mm/fault.c @@ -18,6 +18,7 @@ #include <linux/extable.h> #include <linux/uaccess.h> #include <linux/perf_event.h> +#include <linux/kprobes.h> #include <asm/hardirq.h> #include <asm/mmu_context.h> @@ -53,6 +54,9 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long write, int fault; unsigned long address = mmu_meh & PAGE_MASK; + if (kprobe_page_fault(regs, tsk->thread.trap_no)) + return; + si_code = SEGV_MAPERR; #ifndef CONFIG_CPU_HAS_TLBI @@ -179,11 +183,14 @@ bad_area: bad_area_nosemaphore: /* User mode accesses just cause a SIGSEGV */ if (user_mode(regs)) { + tsk->thread.trap_no = (regs->sr >> 16) & 0xff; force_sig_fault(SIGSEGV, si_code, (void __user *)address); return; } no_context: + tsk->thread.trap_no = (regs->sr >> 16) & 0xff; + /* Are we prepared to handle this kernel fault? */ if (fixup_exception(regs)) return; @@ -198,6 +205,8 @@ no_context: die_if_kernel("Oops", regs, write); out_of_memory: + tsk->thread.trap_no = (regs->sr >> 16) & 0xff; + /* * We ran out of memory, call the OOM killer, and return the userspace * (which will retry the fault, or kill us if we got oom-killed). @@ -206,6 +215,8 @@ out_of_memory: return; do_sigbus: + tsk->thread.trap_no = (regs->sr >> 16) & 0xff; + up_read(&mm->mmap_sem); /* Kernel mode? Handle exceptions or die */ |