diff options
Diffstat (limited to 'arch/arm/kernel')
| -rw-r--r-- | arch/arm/kernel/entry-armv.S | 16 | ||||
| -rw-r--r-- | arch/arm/kernel/kprobes-decode.c | 5 | ||||
| -rw-r--r-- | arch/arm/kernel/process.c | 23 |
3 files changed, 23 insertions, 21 deletions
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S index 7ee48e7f8f3..3fd7861de4d 100644 --- a/arch/arm/kernel/entry-armv.S +++ b/arch/arm/kernel/entry-armv.S @@ -162,8 +162,6 @@ ENDPROC(__und_invalid) @ r4 - orig_r0 (see pt_regs definition in ptrace.h) @ stmia r5, {r0 - r4} - - asm_trace_hardirqs_off .endm .align 5 @@ -204,7 +202,7 @@ __dabt_svc: @ @ IRQs off again before pulling preserved data off the stack @ - disable_irq + disable_irq_notrace @ @ restore SPSR and restart the instruction @@ -218,6 +216,9 @@ ENDPROC(__dabt_svc) __irq_svc: svc_entry +#ifdef CONFIG_TRACE_IRQFLAGS + bl trace_hardirqs_off +#endif #ifdef CONFIG_PREEMPT get_thread_info tsk ldr r8, [tsk, #TI_PREEMPT] @ get preempt count @@ -291,7 +292,7 @@ __und_svc: @ @ IRQs off again before pulling preserved data off the stack @ -1: disable_irq +1: disable_irq_notrace @ @ restore SPSR and restart the instruction @@ -327,7 +328,7 @@ __pabt_svc: @ @ IRQs off again before pulling preserved data off the stack @ - disable_irq + disable_irq_notrace @ @ restore SPSR and restart the instruction @@ -393,8 +394,6 @@ ENDPROC(__pabt_svc) @ Clear FP to mark the first stack frame @ zero_fp - - asm_trace_hardirqs_off .endm .macro kuser_cmpxchg_check @@ -465,9 +464,6 @@ __irq_usr: THUMB( movne r0, #0 ) THUMB( strne r0, [r0] ) #endif -#ifdef CONFIG_TRACE_IRQFLAGS - bl trace_hardirqs_on -#endif mov why, #0 b ret_to_user diff --git a/arch/arm/kernel/kprobes-decode.c b/arch/arm/kernel/kprobes-decode.c index da1f94906a4..8bccbfa693f 100644 --- a/arch/arm/kernel/kprobes-decode.c +++ b/arch/arm/kernel/kprobes-decode.c @@ -583,13 +583,14 @@ static void __kprobes emulate_ldr(struct kprobe *p, struct pt_regs *regs) { insn_llret_3arg_fn_t *i_fn = (insn_llret_3arg_fn_t *)&p->ainsn.insn[0]; kprobe_opcode_t insn = p->opcode; + long ppc = (long)p->addr + 8; union reg_pair fnr; int rd = (insn >> 12) & 0xf; int rn = (insn >> 16) & 0xf; int rm = insn & 0xf; long rdv; - long rnv = regs->uregs[rn]; - long rmv = regs->uregs[rm]; /* rm/rmv may be invalid, don't care. */ + long rnv = (rn == 15) ? ppc : regs->uregs[rn]; + long rmv = (rm == 15) ? ppc : regs->uregs[rm]; long cpsr = regs->ARM_cpsr; fnr.dr = insnslot_llret_3arg_rflags(rnv, 0, rmv, cpsr, i_fn); diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c index acf5e6fdb6d..a4a9cc88bec 100644 --- a/arch/arm/kernel/process.c +++ b/arch/arm/kernel/process.c @@ -351,17 +351,21 @@ EXPORT_SYMBOL(dump_fpu); /* * Shuffle the argument into the correct register before calling the - * thread function. r1 is the thread argument, r2 is the pointer to - * the thread function, and r3 points to the exit function. + * thread function. r4 is the thread argument, r5 is the pointer to + * the thread function, and r6 points to the exit function. */ extern void kernel_thread_helper(void); asm( ".pushsection .text\n" " .align\n" " .type kernel_thread_helper, #function\n" "kernel_thread_helper:\n" -" mov r0, r1\n" -" mov lr, r3\n" -" mov pc, r2\n" +#ifdef CONFIG_TRACE_IRQFLAGS +" bl trace_hardirqs_on\n" +#endif +" msr cpsr_c, r7\n" +" mov r0, r4\n" +" mov lr, r6\n" +" mov pc, r5\n" " .size kernel_thread_helper, . - kernel_thread_helper\n" " .popsection"); @@ -391,11 +395,12 @@ pid_t kernel_thread(int (*fn)(void *), void *arg, unsigned long flags) memset(®s, 0, sizeof(regs)); - regs.ARM_r1 = (unsigned long)arg; - regs.ARM_r2 = (unsigned long)fn; - regs.ARM_r3 = (unsigned long)kernel_thread_exit; + regs.ARM_r4 = (unsigned long)arg; + regs.ARM_r5 = (unsigned long)fn; + regs.ARM_r6 = (unsigned long)kernel_thread_exit; + regs.ARM_r7 = SVC_MODE | PSR_ENDSTATE | PSR_ISETSTATE; regs.ARM_pc = (unsigned long)kernel_thread_helper; - regs.ARM_cpsr = SVC_MODE | PSR_ENDSTATE | PSR_ISETSTATE; + regs.ARM_cpsr = regs.ARM_r7 | PSR_I_BIT; return do_fork(flags|CLONE_VM|CLONE_UNTRACED, 0, ®s, 0, NULL, NULL); } |