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Merge tag 'v4.5-rc6' into core/resources, to resolve conflict

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Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar
2016-03-04 12:12:08 +01:00
parent 4650bac1fc fc77dbd34c
commit bc94b99636
1279 changed files with 15378 additions and 62170 deletions
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48
arch/arm64/kernel/debug-monitors.c
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@@ -226,11 +226,28 @@ static int call_step_hook(struct pt_regs *regs, unsigned int esr)
return retval;
}
static void send_user_sigtrap(int si_code)
{
struct pt_regs *regs = current_pt_regs();
siginfo_t info = {
.si_signo = SIGTRAP,
.si_errno = 0,
.si_code = si_code,
.si_addr = (void __user *)instruction_pointer(regs),
};
if (WARN_ON(!user_mode(regs)))
return;
if (interrupts_enabled(regs))
local_irq_enable();
force_sig_info(SIGTRAP, &info, current);
}
static int single_step_handler(unsigned long addr, unsigned int esr,
struct pt_regs *regs)
{
siginfo_t info;
/*
* If we are stepping a pending breakpoint, call the hw_breakpoint
* handler first.
@@ -239,11 +256,7 @@ static int single_step_handler(unsigned long addr, unsigned int esr,
return 0;
if (user_mode(regs)) {
info.si_signo = SIGTRAP;
info.si_errno = 0;
info.si_code = TRAP_HWBKPT;
info.si_addr = (void __user *)instruction_pointer(regs);
force_sig_info(SIGTRAP, &info, current);
send_user_sigtrap(TRAP_HWBKPT);
/*
* ptrace will disable single step unless explicitly
@@ -307,17 +320,8 @@ static int call_break_hook(struct pt_regs *regs, unsigned int esr)
static int brk_handler(unsigned long addr, unsigned int esr,
struct pt_regs *regs)
{
siginfo_t info;
if (user_mode(regs)) {
info = (siginfo_t) {
.si_signo = SIGTRAP,
.si_errno = 0,
.si_code = TRAP_BRKPT,
.si_addr = (void __user *)instruction_pointer(regs),
};
force_sig_info(SIGTRAP, &info, current);
send_user_sigtrap(TRAP_BRKPT);
} else if (call_break_hook(regs, esr) != DBG_HOOK_HANDLED) {
pr_warning("Unexpected kernel BRK exception at EL1\n");
return -EFAULT;
@@ -328,7 +332,6 @@ static int brk_handler(unsigned long addr, unsigned int esr,
int aarch32_break_handler(struct pt_regs *regs)
{
siginfo_t info;
u32 arm_instr;
u16 thumb_instr;
bool bp = false;
@@ -359,14 +362,7 @@ int aarch32_break_handler(struct pt_regs *regs)
if (!bp)
return -EFAULT;
info = (siginfo_t) {
.si_signo = SIGTRAP,
.si_errno = 0,
.si_code = TRAP_BRKPT,
.si_addr = pc,
};
force_sig_info(SIGTRAP, &info, current);
send_user_sigtrap(TRAP_BRKPT);
return 0;
}

1
arch/arm64/kernel/image.h
View File

@@ -89,6 +89,7 @@ __efistub_memcpy = KALLSYMS_HIDE(__pi_memcpy);
__efistub_memmove = KALLSYMS_HIDE(__pi_memmove);
__efistub_memset = KALLSYMS_HIDE(__pi_memset);
__efistub_strlen = KALLSYMS_HIDE(__pi_strlen);
__efistub_strnlen = KALLSYMS_HIDE(__pi_strnlen);
__efistub_strcmp = KALLSYMS_HIDE(__pi_strcmp);
__efistub_strncmp = KALLSYMS_HIDE(__pi_strncmp);
__efistub___flush_dcache_area = KALLSYMS_HIDE(__pi___flush_dcache_area);

17
arch/arm64/kernel/stacktrace.c
View File

@@ -44,14 +44,13 @@ int notrace unwind_frame(struct task_struct *tsk, struct stackframe *frame)
unsigned long irq_stack_ptr;
/*
* Use raw_smp_processor_id() to avoid false-positives from
* CONFIG_DEBUG_PREEMPT. get_wchan() calls unwind_frame() on sleeping
* task stacks, we can be pre-empted in this case, so
* {raw_,}smp_processor_id() may give us the wrong value. Sleeping
* tasks can't ever be on an interrupt stack, so regardless of cpu,
* the checks will always fail.
* Switching between stacks is valid when tracing current and in
* non-preemptible context.
*/
irq_stack_ptr = IRQ_STACK_PTR(raw_smp_processor_id());
if (tsk == current && !preemptible())
irq_stack_ptr = IRQ_STACK_PTR(smp_processor_id());
else
irq_stack_ptr = 0;
low = frame->sp;
/* irq stacks are not THREAD_SIZE aligned */
@@ -64,8 +63,8 @@ int notrace unwind_frame(struct task_struct *tsk, struct stackframe *frame)
return -EINVAL;
frame->sp = fp + 0x10;
frame->fp = *(unsigned long *)(fp);
frame->pc = *(unsigned long *)(fp + 8);
frame->fp = READ_ONCE_NOCHECK(*(unsigned long *)(fp));
frame->pc = READ_ONCE_NOCHECK(*(unsigned long *)(fp + 8));
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
if (tsk && tsk->ret_stack &&

11
arch/arm64/kernel/traps.c
View File

@@ -146,9 +146,18 @@ static void dump_instr(const char *lvl, struct pt_regs *regs)
static void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk)
{
struct stackframe frame;
unsigned long irq_stack_ptr = IRQ_STACK_PTR(smp_processor_id());
unsigned long irq_stack_ptr;
int skip;
/*
* Switching between stacks is valid when tracing current and in
* non-preemptible context.
*/
if (tsk == current && !preemptible())
irq_stack_ptr = IRQ_STACK_PTR(smp_processor_id());
else
irq_stack_ptr = 0;
pr_debug("%s(regs = %p tsk = %p)\n", __func__, regs, tsk);
if (!tsk)