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author | Catalin Marinas <catalin.marinas@arm.com> | 2012-03-05 11:49:27 +0000 |
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committer | Catalin Marinas <catalin.marinas@arm.com> | 2012-09-17 10:24:46 +0100 |
commit | 60ffc30d5652810dd34ea2eec41504222f5d5791 (patch) | |
tree | b1d8364b8a86df0327b2f6318c4f59e973695337 /arch/arm64/include/asm/traps.h | |
parent | 9703d9d7f77ce129621f7d80a844822e2daa7008 (diff) | |
download | op-kernel-dev-60ffc30d5652810dd34ea2eec41504222f5d5791.zip op-kernel-dev-60ffc30d5652810dd34ea2eec41504222f5d5791.tar.gz |
arm64: Exception handling
The patch contains the exception entry code (kernel/entry.S), pt_regs
structure and related accessors, undefined instruction trapping and
stack tracing.
AArch64 Linux kernel (including kernel threads) runs in EL1 mode using
the SP1 stack. The vectors don't have a fixed address, only alignment
(2^11) requirements.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arm64/include/asm/traps.h')
-rw-r--r-- | arch/arm64/include/asm/traps.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/traps.h b/arch/arm64/include/asm/traps.h new file mode 100644 index 0000000..10ca8ff --- /dev/null +++ b/arch/arm64/include/asm/traps.h @@ -0,0 +1,30 @@ +/* + * Based on arch/arm/include/asm/traps.h + * + * Copyright (C) 2012 ARM Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +#ifndef __ASM_TRAP_H +#define __ASM_TRAP_H + +static inline int in_exception_text(unsigned long ptr) +{ + extern char __exception_text_start[]; + extern char __exception_text_end[]; + + return ptr >= (unsigned long)&__exception_text_start && + ptr < (unsigned long)&__exception_text_end; +} + +#endif |