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Diffstat (limited to 'arch/hexagon/kernel/traps.c')
-rw-r--r--arch/hexagon/kernel/traps.c88
1 files changed, 31 insertions, 57 deletions
diff --git a/arch/hexagon/kernel/traps.c b/arch/hexagon/kernel/traps.c
index 2942a9204a9a..e732aa01c2ff 100644
--- a/arch/hexagon/kernel/traps.c
+++ b/arch/hexagon/kernel/traps.c
@@ -1,21 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Kernel traps/events for Hexagon processor
*
* Copyright (c) 2010-2014, The Linux Foundation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
*/
#include <linux/init.h>
@@ -27,7 +14,7 @@
#include <linux/kdebug.h>
#include <linux/syscalls.h>
#include <linux/signal.h>
-#include <linux/tracehook.h>
+#include <linux/ptrace.h>
#include <asm/traps.h>
#include <asm/vm_fault.h>
#include <asm/syscall.h>
@@ -41,10 +28,6 @@
#define TRAP_SYSCALL 1
#define TRAP_DEBUG 0xdb
-void __init trap_init(void)
-{
-}
-
#ifdef CONFIG_GENERIC_BUG
/* Maybe should resemble arch/sh/kernel/traps.c ?? */
int is_valid_bugaddr(unsigned long addr)
@@ -92,7 +75,7 @@ static const char *ex_name(int ex)
}
static void do_show_stack(struct task_struct *task, unsigned long *fp,
- unsigned long ip)
+ unsigned long ip, const char *loglvl)
{
int kstack_depth_to_print = 24;
unsigned long offset, size;
@@ -106,9 +89,8 @@ static void do_show_stack(struct task_struct *task, unsigned long *fp,
if (task == NULL)
task = current;
- printk(KERN_INFO "CPU#%d, %s/%d, Call Trace:\n",
- raw_smp_processor_id(), task->comm,
- task_pid_nr(task));
+ printk("%sCPU#%d, %s/%d, Call Trace:\n", loglvl, raw_smp_processor_id(),
+ task->comm, task_pid_nr(task));
if (fp == NULL) {
if (task == current) {
@@ -121,7 +103,7 @@ static void do_show_stack(struct task_struct *task, unsigned long *fp,
}
if ((((unsigned long) fp) & 0x3) || ((unsigned long) fp < 0x1000)) {
- printk(KERN_INFO "-- Corrupt frame pointer %p\n", fp);
+ printk("%s-- Corrupt frame pointer %p\n", loglvl, fp);
return;
}
@@ -138,8 +120,7 @@ static void do_show_stack(struct task_struct *task, unsigned long *fp,
name = kallsyms_lookup(ip, &size, &offset, &modname, tmpstr);
- printk(KERN_INFO "[%p] 0x%lx: %s + 0x%lx", fp, ip, name,
- offset);
+ printk("%s[%p] 0x%lx: %s + 0x%lx", loglvl, fp, ip, name, offset);
if (((unsigned long) fp < low) || (high < (unsigned long) fp))
printk(KERN_CONT " (FP out of bounds!)");
if (modname)
@@ -149,18 +130,17 @@ static void do_show_stack(struct task_struct *task, unsigned long *fp,
newfp = (unsigned long *) *fp;
if (((unsigned long) newfp) & 0x3) {
- printk(KERN_INFO "-- Corrupt frame pointer %p\n",
- newfp);
+ printk("%s-- Corrupt frame pointer %p\n", loglvl, newfp);
break;
}
/* Attempt to continue past exception. */
- if (0 == newfp) {
+ if (!newfp) {
struct pt_regs *regs = (struct pt_regs *) (((void *)fp)
+ 8);
if (regs->syscall_nr != -1) {
- printk(KERN_INFO "-- trap0 -- syscall_nr: %ld",
+ printk("%s-- trap0 -- syscall_nr: %ld", loglvl,
regs->syscall_nr);
printk(KERN_CONT " psp: %lx elr: %lx\n",
pt_psp(regs), pt_elr(regs));
@@ -168,7 +148,7 @@ static void do_show_stack(struct task_struct *task, unsigned long *fp,
} else {
/* really want to see more ... */
kstack_depth_to_print += 6;
- printk(KERN_INFO "-- %s (0x%lx) badva: %lx\n",
+ printk("%s-- %s (0x%lx) badva: %lx\n", loglvl,
ex_name(pt_cause(regs)), pt_cause(regs),
pt_badva(regs));
}
@@ -191,10 +171,10 @@ static void do_show_stack(struct task_struct *task, unsigned long *fp,
}
}
-void show_stack(struct task_struct *task, unsigned long *fp)
+void show_stack(struct task_struct *task, unsigned long *fp, const char *loglvl)
{
/* Saved link reg is one word above FP */
- do_show_stack(task, fp, 0);
+ do_show_stack(task, fp, 0, loglvl);
}
int die(const char *str, struct pt_regs *regs, long err)
@@ -215,12 +195,14 @@ int die(const char *str, struct pt_regs *regs, long err)
printk(KERN_EMERG "Oops: %s[#%d]:\n", str, ++die.counter);
if (notify_die(DIE_OOPS, str, regs, err, pt_cause(regs), SIGSEGV) ==
- NOTIFY_STOP)
+ NOTIFY_STOP) {
+ spin_unlock_irq(&die.lock);
return 1;
+ }
print_modules();
show_regs(regs);
- do_show_stack(current, &regs->r30, pt_elr(regs));
+ do_show_stack(current, &regs->r30, pt_elr(regs), KERN_EMERG);
bust_spinlocks(0);
add_taint(TAINT_DIE, LOCKDEP_NOW_UNRELIABLE);
@@ -234,7 +216,7 @@ int die(const char *str, struct pt_regs *regs, long err)
panic("Fatal exception");
oops_exit();
- do_exit(err);
+ make_task_dead(err);
return 0;
}
@@ -252,7 +234,7 @@ int die_if_kernel(char *str, struct pt_regs *regs, long err)
static void misaligned_instruction(struct pt_regs *regs)
{
die_if_kernel("Misaligned Instruction", regs, 0);
- force_sig(SIGBUS, current);
+ force_sig(SIGBUS);
}
/*
@@ -263,19 +245,19 @@ static void misaligned_instruction(struct pt_regs *regs)
static void misaligned_data_load(struct pt_regs *regs)
{
die_if_kernel("Misaligned Data Load", regs, 0);
- force_sig(SIGBUS, current);
+ force_sig(SIGBUS);
}
static void misaligned_data_store(struct pt_regs *regs)
{
die_if_kernel("Misaligned Data Store", regs, 0);
- force_sig(SIGBUS, current);
+ force_sig(SIGBUS);
}
static void illegal_instruction(struct pt_regs *regs)
{
die_if_kernel("Illegal Instruction", regs, 0);
- force_sig(SIGILL, current);
+ force_sig(SIGILL);
}
/*
@@ -285,7 +267,7 @@ static void illegal_instruction(struct pt_regs *regs)
static void precise_bus_error(struct pt_regs *regs)
{
die_if_kernel("Precise Bus Error", regs, 0);
- force_sig(SIGBUS, current);
+ force_sig(SIGBUS);
}
/*
@@ -301,6 +283,7 @@ static void cache_error(struct pt_regs *regs)
/*
* General exception handler
*/
+void do_genex(struct pt_regs *regs);
void do_genex(struct pt_regs *regs)
{
/*
@@ -351,13 +334,7 @@ void do_genex(struct pt_regs *regs)
}
}
-/* Indirect system call dispatch */
-long sys_syscall(void)
-{
- printk(KERN_ERR "sys_syscall invoked!\n");
- return -ENOSYS;
-}
-
+void do_trap0(struct pt_regs *regs);
void do_trap0(struct pt_regs *regs)
{
syscall_fn syscall;
@@ -368,7 +345,7 @@ void do_trap0(struct pt_regs *regs)
/* allow strace to catch syscall args */
if (unlikely(test_thread_flag(TIF_SYSCALL_TRACE) &&
- tracehook_report_syscall_entry(regs)))
+ ptrace_report_syscall_entry(regs)))
return; /* return -ENOSYS somewhere? */
/* Interrupts should be re-enabled for syscall processing */
@@ -406,16 +383,12 @@ void do_trap0(struct pt_regs *regs)
/* allow strace to get the syscall return state */
if (unlikely(test_thread_flag(TIF_SYSCALL_TRACE)))
- tracehook_report_syscall_exit(regs, 0);
+ ptrace_report_syscall_exit(regs, 0);
break;
case TRAP_DEBUG:
/* Trap0 0xdb is debug breakpoint */
if (user_mode(regs)) {
- struct siginfo info;
-
- info.si_signo = SIGTRAP;
- info.si_errno = 0;
/*
* Some architecures add some per-thread state
* to distinguish between breakpoint traps and
@@ -423,9 +396,8 @@ void do_trap0(struct pt_regs *regs)
* set the si_code value appropriately, or we
* may want to use a different trap0 flavor.
*/
- info.si_code = TRAP_BRKPT;
- info.si_addr = (void __user *) pt_elr(regs);
- force_sig_info(SIGTRAP, &info, current);
+ force_sig_fault(SIGTRAP, TRAP_BRKPT,
+ (void __user *) pt_elr(regs));
} else {
#ifdef CONFIG_KGDB
kgdb_handle_exception(pt_cause(regs), SIGTRAP,
@@ -440,6 +412,7 @@ void do_trap0(struct pt_regs *regs)
/*
* Machine check exception handler
*/
+void do_machcheck(struct pt_regs *regs);
void do_machcheck(struct pt_regs *regs)
{
/* Halt and catch fire */
@@ -450,6 +423,7 @@ void do_machcheck(struct pt_regs *regs)
* Treat this like the old 0xdb trap.
*/
+void do_debug_exception(struct pt_regs *regs);
void do_debug_exception(struct pt_regs *regs)
{
regs->hvmer.vmest &= ~HVM_VMEST_CAUSE_MSK;
generated by cgit (git 2.34.1) at 2025-12-25 18:02:14 +0000