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#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/kallsyms.h>
#include <linux/interrupt.h>
#include <linux/mtk_ram_console.h>
#include <linux/sched.h>
#include <asm/signal.h>
#include <mach/sync_write.h>
//defined in backstrace32.asm
extern asmlinkage void c_backtrace_ramconsole_print(unsigned long fp, int pmode);
void dump_backtrace_entry_ramconsole_print(unsigned long where, unsigned long from, unsigned long frame)
{
char str_buf[256];
#ifdef CONFIG_KALLSYMS
snprintf(str_buf, sizeof(str_buf), "[<%08lx>] (%pS) from [<%08lx>] (%pS)\n", where, (void *)where, from, (void *)from);
#else
snprintf(str_buf, sizeof(str_buf), "Function entered at [<%08lx>] from [<%08lx>]\n", where, from);
#endif
aee_sram_fiq_log(str_buf);
}
void dump_regs(const char *fmt, const char v1, const unsigned int reg, const unsigned int reg_val)
{
char str_buf[256];
snprintf(str_buf, sizeof(str_buf), fmt, v1, reg, reg_val);
aee_sram_fiq_log(str_buf);
}
static int verify_stack(unsigned long sp)
{
if (sp < PAGE_OFFSET ||(sp > (unsigned long)high_memory && high_memory != NULL))
return -EFAULT;
return 0;
}
void aee_dump_backtrace(struct pt_regs *regs, struct task_struct *tsk)
{
char str_buf[256];
unsigned int fp, mode;
int ok = 1;
snprintf(str_buf, sizeof(str_buf), "PC is 0x%lx, LR is 0x%lx\n", regs->ARM_pc, regs->ARM_lr);
aee_sram_fiq_log(str_buf);
if (!tsk)
tsk = current;
if (regs) {
fp = regs->ARM_fp;
mode = processor_mode(regs);
} else if (tsk != current) {
fp = thread_saved_fp(tsk);
mode = 0x10;
} else {
asm("mov %0, fp" : "=r" (fp) : : "cc");
mode = 0x10;
}
if (!fp) {
aee_sram_fiq_log("no frame pointer");
ok = 0;
} else if (verify_stack(fp)) {
aee_sram_fiq_log("invalid frame pointer");
ok = 0;
} else if (fp < (unsigned long)end_of_stack(tsk))
aee_sram_fiq_log("frame pointer underflow");
aee_sram_fiq_log("\n");
if (ok)
c_backtrace_ramconsole_print(fp, mode);
}
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