Clear the IT state when invoking a Thumb-2 signal handler

If a process is interrupted during an If-Then block and a signal is
invoked, the ITSTATE bits must be cleared otherwise the handler would
not run correctly.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Joseph S. Myers <joseph@codesourcery.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/arch/arm/include/asm/ptrace.h b/arch/arm/include/asm/ptrace.h
index 236a06b9b7ce..4a4290f7b4a2 100644
--- a/arch/arm/include/asm/ptrace.h
+++ b/arch/arm/include/asm/ptrace.h
@@ -65,6 +65,13 @@
 #define PSR_x           0x0000ff00      /* Extension            */
 #define PSR_c           0x000000ff      /* Control              */
 
+/*
+ * ARMv7 groups of APSR bits
+ */
+#define PSR_ISET_MASK   0x01000010      /* ISA state (J, T) mask */
+#define PSR_IT_MASK     0x0600fc00      /* If-Then execution state mask */
+#define PSR_ENDIAN_MASK 0x00000200      /* Endianness state mask */
+
 #ifndef __ASSEMBLY__
 
 /*