From mboxrd@z Thu Jan 1 00:00:00 1970 From: ben.dooks@codethink.co.uk (Ben Dooks) Date: Wed, 28 Aug 2013 12:45:52 +0100 Subject: [PATCH 12/19] ARM: traps: use to get correct instruction order In-Reply-To: <1377690359-25397-1-git-send-email-ben.dooks@codethink.co.uk> References: <1377639509-22778-1-git-send-email-ben.dooks@codethink.co.uk> <1377690359-25397-1-git-send-email-ben.dooks@codethink.co.uk> Message-ID: <1377690359-25397-13-git-send-email-ben.dooks@codethink.co.uk> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org The trap handler needs to take into account the endian configuration of the system when loading instructions. Use to provide the necessary conversion functions. Signed-off-by: Ben Dooks --- arch/arm/kernel/traps.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c index ab517fc..99bcd0e3 100644 --- a/arch/arm/kernel/traps.c +++ b/arch/arm/kernel/traps.c @@ -34,6 +34,7 @@ #include #include #include +#include static const char *handler[]= { "prefetch abort", "data abort", "address exception", "interrupt" }; @@ -402,25 +403,28 @@ asmlinkage void __exception do_undefinstr(struct pt_regs *regs) if (processor_mode(regs) == SVC_MODE) { #ifdef CONFIG_THUMB2_KERNEL if (thumb_mode(regs)) { - instr = ((u16 *)pc)[0]; + instr = __mem_to_opcode_thumb16(((u16 *)pc)[0]); if (is_wide_instruction(instr)) { - instr <<= 16; - instr |= ((u16 *)pc)[1]; + u16 inst2; + instr2 = __mem_to_opcode_thumb16(((u16 *)pc)[1]); + instr = __opcode_thumb32_compose(instr, instr2); } } else #endif - instr = *(u32 *) pc; + instr = __mem_to_opcode_arm(*(u32 *) pc); } else if (thumb_mode(regs)) { if (get_user(instr, (u16 __user *)pc)) goto die_sig; + instr = __mem_to_opcode_thumb16(instr); if (is_wide_instruction(instr)) { unsigned int instr2; if (get_user(instr2, (u16 __user *)pc+1)) goto die_sig; - instr <<= 16; - instr |= instr2; + instr2 = __mem_to_opcode_thumb16(instr2); + instr = __opcode_thumb32_compose(instr, instr2); } } else if (get_user(instr, (u32 __user *)pc)) { + instr = __mem_to_opcode_arm(instr); goto die_sig; } -- 1.7.10.4