diff options
| author | Josh Poimboeuf <jpoimboe@kernel.org> | 2023-02-10 14:42:01 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2023-02-11 12:37:51 +0100 |
| commit | ffb1b4a41016295e298409c9dbcacd55680bd6d4 (patch) | |
| tree | 28b6a4e2afd6c2ad1999bca5d95f8ba24133a942 /arch/x86/kernel | |
| parent | a20717aca33b1ff133f513721050fe6c3d7f97b5 (diff) | |
x86/unwind/orc: Add 'signal' field to ORC metadata
Add a 'signal' field which allows unwind hints to specify whether the
instruction pointer should be taken literally (like for most interrupts
and exceptions) rather than decremented (like for call stack return
addresses) when used to find the next ORC entry.
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/d2c5ec4d83a45b513d8fd72fab59f1a8cfa46871.1676068346.git.jpoimboe@kernel.org
Diffstat (limited to 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/unwind_orc.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/arch/x86/kernel/unwind_orc.c b/arch/x86/kernel/unwind_orc.c index cdf6c6060170..37307b40f8da 100644 --- a/arch/x86/kernel/unwind_orc.c +++ b/arch/x86/kernel/unwind_orc.c @@ -484,6 +484,8 @@ bool unwind_next_frame(struct unwind_state *state) goto the_end; } + state->signal = orc->signal; + /* Find the previous frame's stack: */ switch (orc->sp_reg) { case ORC_REG_SP: @@ -563,7 +565,6 @@ bool unwind_next_frame(struct unwind_state *state) state->sp = sp; state->regs = NULL; state->prev_regs = NULL; - state->signal = false; break; case UNWIND_HINT_TYPE_REGS: @@ -587,7 +588,6 @@ bool unwind_next_frame(struct unwind_state *state) state->regs = (struct pt_regs *)sp; state->prev_regs = NULL; state->full_regs = true; - state->signal = true; break; case UNWIND_HINT_TYPE_REGS_PARTIAL: @@ -604,7 +604,6 @@ bool unwind_next_frame(struct unwind_state *state) state->prev_regs = state->regs; state->regs = (void *)sp - IRET_FRAME_OFFSET; state->full_regs = false; - state->signal = true; break; default: |