[PATCH] MIPS64: signal: n64 kernel bugfix of MIPS32 o32 ABI sigaction syscall

Leonid Yegoshin
2015-10-15T18:49:44Z

MIPS32 o32 ABI sigaction() processing on MIPS64 n64 kernel was incorrectly
set to processing aka rt_sigaction() variant only.

Fixed.

Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
---
arch/mips/include/asm/signal.h | 15 ++++++++++++---
arch/mips/kernel/signal.c | 2 +-
2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/arch/mips/include/asm/signal.h b/arch/mips/include/asm/signal.h
index 003e273eff4c..06fe599782df 100644
--- a/arch/mips/include/asm/signal.h
+++ b/arch/mips/include/asm/signal.h
@@ -11,11 +11,20 @@

#include <uapi/asm/signal.h>

+#ifdef CONFIG_MIPS32_COMPAT
+extern struct mips_abi mips_abi_32;

-#ifdef CONFIG_TRAD_SIGNALS
-#define sig_uses_siginfo(ka) ((ka)->sa.sa_flags & SA_SIGINFO)
+#define sig_uses_siginfo(ka, abi) \
+ (config_enabled(CONFIG_64BIT) ? \
+ (config_enabled(CONFIG_MIPS32_COMPAT) ? \
+ (abi != &mips_abi_32) : 1) : \
+ (config_enabled(CONFIG_TRAD_SIGNALS) ? \
+ ((ka)->sa.sa_flags & SA_SIGINFO) : 1) )
#else
-#define sig_uses_siginfo(ka) (1)
+#define sig_uses_siginfo(ka, abi) \
+ (config_enabled(CONFIG_64BIT) ? 1 : \
+ (config_enabled(CONFIG_TRAD_SIGNALS) ? \
+ ((ka)->sa.sa_flags & SA_SIGINFO) : 1) )
#endif

#include <asm/sigcontext.h>
diff --git a/arch/mips/kernel/signal.c b/arch/mips/kernel/signal.c
index bf792e2839a6..5f18d0b879e0 100644
--- a/arch/mips/kernel/signal.c
+++ b/arch/mips/kernel/signal.c
@@ -798,7 +798,7 @@ static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)
regs->regs[0] = 0; /* Don't deal with this again. */
}

- if (sig_uses_siginfo(&ksig->ka))
+ if (sig_uses_siginfo(&ksig->ka, abi))
ret = abi->setup_rt_frame(vdso + abi->vdso->off_rt_sigreturn,
ksig, regs, oldset);
else