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authorCatalin Marinas <catalin.marinas@arm.com>2009-06-19 16:42:11 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2009-06-19 16:44:22 +0100
commitc894ed6956f126d60d888e8efc5fb3a595ba89ae (patch)
tree9c84511dee1084d9ee15a5e667289017e182010d /arch/powerpc/boot/serial.c
parent7436127ce9042f95a10bb5423f726fd63a61934d (diff)
[ARM] 5558/1: Add extra checks to ARM unwinder to avoid tracing corrupt stacks
There are situations where the unwinder goes beyond stack boundaries and unwinds random data. This patch moves the stack boundaries check after the unwind_exec_insn() call and adds an extra check for possible infinite loops (like "mov pc, lr" with pc == lr). The patch also fixes a bug in the unwind instructions interpreter. The 0xb0 instruction can only set PC to LR if this wasn't already set by a previous instruction (this is used on exceptions taken while in kernel mode where svc_entry is annotated with ".save {r0 - pc}"). Tested-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/powerpc/boot/serial.c')
0 files changed, 0 insertions, 0 deletions