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Groups > linux.kernel > #1369948
| From | Andy Lutomirski <luto@kernel.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH v5 4/9] x86/traps: Enable all exception handler callbacks early |
| Date | 2016-04-02 16:10 +0200 |
| Message-ID | <rjups-4TG-3@gated-at.bofh.it> (permalink) |
| References | <rjups-4TG-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Now that early_fixup_exception has pt_regs, we can just call
fixup_exception from it. This will make fancy exception handlers
work early.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
---
arch/x86/mm/extable.c | 19 ++-----------------
1 file changed, 2 insertions(+), 17 deletions(-)
diff --git a/arch/x86/mm/extable.c b/arch/x86/mm/extable.c
index 8997022abebc..50dfe438bd91 100644
--- a/arch/x86/mm/extable.c
+++ b/arch/x86/mm/extable.c
@@ -95,10 +95,6 @@ extern unsigned int early_recursion_flag;
/* Restricted version used during very early boot */
void __init early_fixup_exception(struct pt_regs *regs, int trapnr)
{
- const struct exception_table_entry *e;
- unsigned long new_ip;
- ex_handler_t handler;
-
/* Ignore early NMIs. */
if (trapnr == X86_TRAP_NMI)
return;
@@ -109,19 +105,8 @@ void __init early_fixup_exception(struct pt_regs *regs, int trapnr)
if (regs->cs != __KERNEL_CS)
goto fail;
- e = search_exception_tables(regs->ip);
- if (!e)
- goto fail;
-
- new_ip = ex_fixup_addr(e);
- handler = ex_fixup_handler(e);
-
- /* special handling not supported during early boot */
- if (handler != ex_handler_default)
- goto fail;
-
- regs->ip = new_ip;
- return;
+ if (fixup_exception(regs, trapnr))
+ return;
fail:
early_printk("PANIC: early exception 0x%02x IP %lx:%lx error %lx cr2 0x%lx\n",
--
2.5.5
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[PATCH v5 4/9] x86/traps: Enable all exception handler callbacks early Andy Lutomirski <luto@kernel.org> - 2016-04-02 16:10 +0200
Re: [PATCH v5 4/9] x86/traps: Enable all exception handler callbacks early Borislav Petkov <bp@alien8.de> - 2016-04-02 21:00 +0200
Re: [PATCH v5 4/9] x86/traps: Enable all exception handler callbacks early Andy Lutomirski <luto@amacapital.net> - 2016-04-02 22:20 +0200
Re: [PATCH v5 4/9] x86/traps: Enable all exception handler callbacks early Borislav Petkov <bp@alien8.de> - 2016-04-02 23:00 +0200
Re: [PATCH v5 4/9] x86/traps: Enable all exception handler callbacks early Borislav Petkov <bp@alien8.de> - 2016-04-03 10:10 +0200
Re: [PATCH v5 4/9] x86/traps: Enable all exception handler callbacks early Andy Lutomirski <luto@amacapital.net> - 2016-04-03 15:30 +0200
Re: [PATCH v5 4/9] x86/traps: Enable all exception handler callbacks early Linus Torvalds <torvalds@linux-foundation.org> - 2016-04-03 16:00 +0200
Re: [PATCH v5 4/9] x86/traps: Enable all exception handler callbacks early Andy Lutomirski <luto@amacapital.net> - 2016-04-03 16:00 +0200
Re: [PATCH v5 4/9] x86/traps: Enable all exception handler callbacks early Linus Torvalds <torvalds@linux-foundation.org> - 2016-04-03 16:20 +0200
Re: [PATCH v5 4/9] x86/traps: Enable all exception handler callbacks early Borislav Petkov <bp@alien8.de> - 2016-04-03 16:20 +0200
Re: [PATCH v5 4/9] x86/traps: Enable all exception handler callbacks early Andy Lutomirski <luto@amacapital.net> - 2016-04-04 17:50 +0200
[tip:x86/asm] x86/traps: Enable all exception handler callbacks early tip-bot for Andy Lutomirski <tipbot@zytor.com> - 2016-04-13 13:50 +0200
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