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-rw-r--r--arch/arm/kernel/asm-offsets.c3
-rw-r--r--arch/arm/kernel/entry-armv.S24
-rw-r--r--arch/arm/kernel/kprobes-decode.c5
-rw-r--r--arch/arm/kernel/perf_event.c2
-rw-r--r--arch/arm/kernel/process.c36
5 files changed, 48 insertions, 22 deletions
diff --git a/arch/arm/kernel/asm-offsets.c b/arch/arm/kernel/asm-offsets.c
index 883511522fc..85f2a019f77 100644
--- a/arch/arm/kernel/asm-offsets.c
+++ b/arch/arm/kernel/asm-offsets.c
@@ -40,6 +40,9 @@
int main(void)
{
DEFINE(TSK_ACTIVE_MM, offsetof(struct task_struct, active_mm));
+#ifdef CONFIG_CC_STACKPROTECTOR
+ DEFINE(TSK_STACK_CANARY, offsetof(struct task_struct, stack_canary));
+#endif
BLANK();
DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
DEFINE(TI_PREEMPT, offsetof(struct thread_info, preempt_count));
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index 7ee48e7f8f3..9ef9a826699 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
@@ -745,6 +741,11 @@ ENTRY(__switch_to)
mov r4, #0xffff0fff
str r3, [r4, #-15] @ TLS val at 0xffff0ff0
#endif
+#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
#endif
@@ -753,6 +754,9 @@ 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
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/perf_event.c b/arch/arm/kernel/perf_event.c
index c45768614c8..de12536d687 100644
--- a/arch/arm/kernel/perf_event.c
+++ b/arch/arm/kernel/perf_event.c
@@ -201,7 +201,7 @@ armpmu_event_update(struct perf_event *event,
{
int shift = 64 - 32;
s64 prev_raw_count, new_raw_count;
- s64 delta;
+ u64 delta;
again:
prev_raw_count = atomic64_read(&hwc->prev_count);
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index acf5e6fdb6d..43557a1eb61 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -28,6 +28,7 @@
#include <linux/tick.h>
#include <linux/utsname.h>
#include <linux/uaccess.h>
+#include <linux/random.h>
#include <asm/leds.h>
#include <asm/processor.h>
@@ -36,6 +37,12 @@
#include <asm/stacktrace.h>
#include <asm/mach/time.h>
+#ifdef CONFIG_CC_STACKPROTECTOR
+#include <linux/stackprotector.h>
+unsigned long __stack_chk_guard __read_mostly;
+EXPORT_SYMBOL(__stack_chk_guard);
+#endif
+
static const char *processor_modes[] = {
"USER_26", "FIQ_26" , "IRQ_26" , "SVC_26" , "UK4_26" , "UK5_26" , "UK6_26" , "UK7_26" ,
"UK8_26" , "UK9_26" , "UK10_26", "UK11_26", "UK12_26", "UK13_26", "UK14_26", "UK15_26",
@@ -351,17 +358,21 @@ 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 +402,12 @@ pid_t kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
memset(&regs, 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, &regs, 0, NULL, NULL);
}
@@ -421,3 +433,9 @@ unsigned long get_wchan(struct task_struct *p)
} while (count ++ < 16);
return 0;
}
+
+unsigned long arch_randomize_brk(struct mm_struct *mm)
+{
+ unsigned long range_end = mm->brk + 0x02000000;
+ return randomize_range(mm->brk, range_end, 0) ? : mm->brk;
+}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-10-24 12:23:37 +0000