diff options
author | Russell King <rmk+kernel@armlinux.org.uk> | 2020-12-21 11:19:24 +0000 |
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committer | Russell King <rmk+kernel@armlinux.org.uk> | 2020-12-21 11:19:24 +0000 |
commit | 8cc9251737d1883e33fd0a7dafbd4062916c1ca6 (patch) | |
tree | 6a1901ccbce167330049ce9b2afced122b325c4a /arch/arm/kernel/entry-armv.S | |
parent | e64ab473dddaffdfc4bd0b385204f472f2cb00d6 (diff) | |
parent | 10fce53c0ef8f6e79115c3d9e0d7ea1338c3fa37 (diff) |
Merge branches 'fixes' and 'misc' into for-next
Diffstat (limited to 'arch/arm/kernel/entry-armv.S')
-rw-r--r-- | arch/arm/kernel/entry-armv.S | 28 |
1 files changed, 4 insertions, 24 deletions
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S index 55a47df04773..0ea8529a4872 100644 --- a/arch/arm/kernel/entry-armv.S +++ b/arch/arm/kernel/entry-armv.S @@ -252,31 +252,10 @@ __und_svc: #else svc_entry #endif - @ - @ call emulation code, which returns using r9 if it has emulated - @ the instruction, or the more conventional lr if we are to treat - @ this as a real undefined instruction - @ - @ r0 - instruction - @ -#ifndef CONFIG_THUMB2_KERNEL - ldr r0, [r4, #-4] -#else - mov r1, #2 - ldrh r0, [r4, #-2] @ Thumb instruction at LR - 2 - cmp r0, #0xe800 @ 32-bit instruction if xx >= 0 - blo __und_svc_fault - ldrh r9, [r4] @ bottom 16 bits - add r4, r4, #2 - str r4, [sp, #S_PC] - orr r0, r9, r0, lsl #16 -#endif - badr r9, __und_svc_finish - mov r2, r4 - bl call_fpe mov r1, #4 @ PC correction to apply -__und_svc_fault: + THUMB( tst r5, #PSR_T_BIT ) @ exception taken in Thumb mode? + THUMB( movne r1, #2 ) @ if so, fix up PC correction mov r0, sp @ struct pt_regs *regs bl __und_fault @@ -427,7 +406,8 @@ ENDPROC(__fiq_abt) @ if it was interrupted in a critical region. Here we @ perform a quick test inline since it should be false @ 99.9999% of the time. The rest is done out of line. - cmp r4, #TASK_SIZE + ldr r0, =TASK_SIZE + cmp r4, r0 blhs kuser_cmpxchg64_fixup #endif #endif |