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| author | Paul Mundt <lethal@linux-sh.org> | 2009-08-24 22:49:17 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2009-08-24 22:49:17 +0900 |
| commit | 12cceb6251c2cd23e936b25eca66be99ba41b081 (patch) | |
| tree | b7f62853e67b305519c375162760422fbfc81b8e /arch/sh/kernel/signal_32.c | |
| parent | f13327864f94c3a0e6acca923df537d20059639f (diff) | |
| parent | 05ecd5a1f76c183cca381705b3adb7d77c9a0439 (diff) | |
| download | kernel_goldelico_gta04-12cceb6251c2cd23e936b25eca66be99ba41b081.zip kernel_goldelico_gta04-12cceb6251c2cd23e936b25eca66be99ba41b081.tar.gz kernel_goldelico_gta04-12cceb6251c2cd23e936b25eca66be99ba41b081.tar.bz2 | |
Merge branch 'sh/st-integration'
Diffstat (limited to 'arch/sh/kernel/signal_32.c')
| -rw-r--r-- | arch/sh/kernel/signal_32.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/arch/sh/kernel/signal_32.c b/arch/sh/kernel/signal_32.c index b5afbec..6010750 100644 --- a/arch/sh/kernel/signal_32.c +++ b/arch/sh/kernel/signal_32.c @@ -41,6 +41,16 @@ struct fdpic_func_descriptor { }; /* + * The following define adds a 64 byte gap between the signal + * stack frame and previous contents of the stack. This allows + * frame unwinding in a function epilogue but only if a frame + * pointer is used in the function. This is necessary because + * current gcc compilers (<4.3) do not generate unwind info on + * SH for function epilogues. + */ +#define UNWINDGUARD 64 + +/* * Atomically swap in the new signal mask, and wait for a signal. */ asmlinkage int @@ -327,7 +337,7 @@ get_sigframe(struct k_sigaction *ka, unsigned long sp, size_t frame_size) sp = current->sas_ss_sp + current->sas_ss_size; } - return (void __user *)((sp - frame_size) & -8ul); + return (void __user *)((sp - (frame_size+UNWINDGUARD)) & -8ul); } /* These symbols are defined with the addresses in the vsyscall page. |