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#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/uaccess.h>
#include "ipanic.h"
char NativeInfo[MAX_NATIVEINFO]; /* check that 32k is enought?? */
unsigned long User_Stack[MAX_NATIVEHEAP]; /* 8K Heap */
void _LOG(const char *fmt, ...)
{
char buf[256];
int len = 0;
va_list ap;
va_start(ap, fmt);
len = strlen(NativeInfo);
if ((len + sizeof(buf)) < MAX_NATIVEINFO)
vsnprintf(&NativeInfo[len], sizeof(buf), fmt, ap);
va_end(ap);
}
void dump_registers(struct pt_regs *r)
{
if (r != NULL) {
_LOG(" r0 %08x r1 %08x r2 %08x r3 %08x\n",
r->ARM_r0, r->ARM_r1, r->ARM_r2, r->ARM_r3);
_LOG(" r4 %08x r5 %08x r6 %08x r7 %08x\n",
r->ARM_r4, r->ARM_r5, r->ARM_r6, r->ARM_r7);
_LOG(" r8 %08x r9 %08x 10 %08x fp %08x\n",
r->ARM_r8, r->ARM_r9, r->ARM_r10, r->ARM_fp);
_LOG(" ip %08x sp %08x lr %08x pc %08x cpsr %08x\n",
r->ARM_ip, r->ARM_sp, r->ARM_lr, r->ARM_pc, r->ARM_cpsr);
}
}
int DumpNativeInfo(void)
{
struct task_struct *current_task;
struct pt_regs *user_ret;
struct vm_area_struct *vma;
unsigned long userstack_start = 0;
unsigned long userstack_end = 0, length = 0;
int mapcount = 0;
struct file *file;
int flags;
struct mm_struct *mm;
int ret = 0, i = 0;
current_task = get_current();
user_ret = task_pt_regs(current_task);
if (!user_mode(user_ret))
return 0;
dump_registers(user_ret);
LOGI("pc/lr/sp 0x%08lx/0x%08lx/0x%08lx\n", user_ret->ARM_pc, user_ret->ARM_lr,
user_ret->ARM_sp);
_LOG("pc/lr/sp 0x%08lx/0x%08lx/0x%08lx\n", user_ret->ARM_pc, user_ret->ARM_lr,
user_ret->ARM_sp);
userstack_start = (unsigned long)user_ret->ARM_sp;
if (current_task->mm == NULL)
return 0;
vma = current_task->mm->mmap;
while (vma && (mapcount < current_task->mm->map_count)) {
file = vma->vm_file;
flags = vma->vm_flags;
if (file) {
_LOG("%08lx-%08lx %c%c%c%c %s\n", vma->vm_start, vma->vm_end,
flags & VM_READ ? 'r' : '-',
flags & VM_WRITE ? 'w' : '-',
flags & VM_EXEC ? 'x' : '-',
flags & VM_MAYSHARE ? 's' : 'p', file->f_path.dentry->d_iname);
} else {
const char *name = arch_vma_name(vma);
mm = vma->vm_mm;
if (!name) {
if (mm) {
if (vma->vm_start <= mm->start_brk &&
vma->vm_end >= mm->brk) {
name = "[heap]";
} else if (vma->vm_start <= mm->start_stack &&
vma->vm_end >= mm->start_stack) {
name = "[stack]";
}
} else {
name = "[vdso]";
}
}
/* if (name) */
{
_LOG("%08lx-%08lx %c%c%c%c %s\n", vma->vm_start, vma->vm_end,
flags & VM_READ ? 'r' : '-',
flags & VM_WRITE ? 'w' : '-',
flags & VM_EXEC ? 'x' : '-',
flags & VM_MAYSHARE ? 's' : 'p', name);
}
}
vma = vma->vm_next;
mapcount++;
}
vma = current_task->mm->mmap;
while (vma != NULL) {
if (vma->vm_start <= userstack_start && vma->vm_end >= userstack_start) {
userstack_end = vma->vm_end;
break;
}
vma = vma->vm_next;
if (vma == current_task->mm->mmap) {
break;
}
}
if (userstack_end == 0) {
LOGE("Dump native stack failed:\n");
return 0;
}
LOGI("Dump stack range (0x%08lx:0x%08lx)\n", userstack_start, userstack_end);
_LOG("Dump stack range (0x%08lx:0x%08lx)\n", userstack_start, userstack_end);
length =
((userstack_end - userstack_start) <
(sizeof(User_Stack) - 1)) ? (userstack_end - userstack_start) : (sizeof(User_Stack) -
1);
ret = copy_from_user((void *)(User_Stack), (const void __user *)(userstack_start), length);
LOGI("copy_from_user ret(0x%08x),len:%lx\n", ret, length);
i = 0;
while ((i < (length / 4)) && (userstack_start < userstack_end)) {
_LOG("0x%08x: 0x%08x\n", userstack_start, User_Stack[i]);
userstack_start += 4;
i++;
}
LOGD("end dump native stack:\n");
_LOG("end dump native stack:\n");
return 0;
}
void aee_dumpnative(void)
{
char *printk_buf = NativeInfo;
int log_length = 0;
memset(NativeInfo, 0, MAX_NATIVEINFO);
DumpNativeInfo();
log_length = strlen(NativeInfo);
LOGD("\n DumpNativeInfo : %d\n", log_length);
/* printk temporary buffer printk_buf[1024]. To avoid char loss, add 4 bytes here */
while (log_length > 0) {
LOGE("%s", printk_buf);
printk_buf += 1020;
log_length -= 1020;
}
}
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