diff options
Diffstat (limited to 'arch/arm/kernel/entry-armv.S')
| -rw-r--r-- | arch/arm/kernel/entry-armv.S | 40 |
1 files changed, 19 insertions, 21 deletions
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S index 3fd7861de4d1..c09e3573c5de 100644 --- a/arch/arm/kernel/entry-armv.S +++ b/arch/arm/kernel/entry-armv.S @@ -22,6 +22,7 @@ #include <asm/thread_notify.h> #include <asm/unwind.h> #include <asm/unistd.h> +#include <asm/tls.h> #include "entry-header.S" @@ -45,7 +46,8 @@ * this macro assumes that irqstat (r6) and base (r5) are * preserved from get_irqnr_and_base above */ - test_for_ipi r0, r6, r5, lr + ALT_SMP(test_for_ipi r0, r6, r5, lr) + ALT_UP_B(9997f) movne r0, sp adrne lr, BSYM(1b) bne do_IPI @@ -56,6 +58,7 @@ adrne lr, BSYM(1b) bne do_local_timer #endif +9997: #endif .endm @@ -735,11 +738,11 @@ ENTRY(__switch_to) #ifdef CONFIG_MMU ldr r6, [r2, #TI_CPU_DOMAIN] #endif -#if defined(CONFIG_HAS_TLS_REG) - mcr p15, 0, r3, c13, c0, 3 @ set TLS register -#elif !defined(CONFIG_TLS_REG_EMUL) - mov r4, #0xffff0fff - str r3, [r4, #-15] @ TLS val at 0xffff0ff0 + set_tls r3, r4, r5 +#if defined(CONFIG_CC_STACKPROTECTOR) && !defined(CONFIG_SMP) + ldr r7, [r2, #TI_TASK] + ldr r8, =__stack_chk_guard + ldr r7, [r7, #TSK_STACK_CANARY] #endif #ifdef CONFIG_MMU mcr p15, 0, r6, c3, c0, 0 @ Set domain register @@ -749,6 +752,9 @@ ENTRY(__switch_to) ldr r0, =thread_notify_head mov r1, #THREAD_NOTIFY_SWITCH bl atomic_notifier_call_chain +#if defined(CONFIG_CC_STACKPROTECTOR) && !defined(CONFIG_SMP) + str r7, [r8] +#endif THUMB( mov ip, r4 ) mov r0, r5 ARM( ldmia r4, {r4 - sl, fp, sp, pc} ) @ Load all regs saved previously @@ -961,11 +967,8 @@ kuser_cmpxchg_fixup: beq 1b rsbs r0, r3, #0 /* beware -- each __kuser slot must be 8 instructions max */ -#ifdef CONFIG_SMP - b __kuser_memory_barrier -#else - usr_ret lr -#endif + ALT_SMP(b __kuser_memory_barrier) + ALT_UP(usr_ret lr) #endif @@ -1005,17 +1008,12 @@ kuser_cmpxchg_fixup: */ __kuser_get_tls: @ 0xffff0fe0 - -#if !defined(CONFIG_HAS_TLS_REG) && !defined(CONFIG_TLS_REG_EMUL) - ldr r0, [pc, #(16 - 8)] @ TLS stored at 0xffff0ff0 -#else - mrc p15, 0, r0, c13, c0, 3 @ read TLS register -#endif + ldr r0, [pc, #(16 - 8)] @ read TLS, set in kuser_get_tls_init usr_ret lr - - .rep 5 - .word 0 @ pad up to __kuser_helper_version - .endr + mrc p15, 0, r0, c13, c0, 3 @ 0xffff0fe8 hardware TLS code + .rep 4 + .word 0 @ 0xffff0ff0 software TLS value, then + .endr @ pad up to __kuser_helper_version /* * Reference declaration: |