#include <linux/irq.h>
#include <asm/trace.h>
#include <asm/fixed_code.h>
+#include <asm/dma.h>
#ifdef CONFIG_KGDB
# include <linux/debugger.h>
struct vm_area_struct *vma = vml->vma;
if (address >= vma->vm_start && address < vma->vm_end) {
+ char _tmpbuf[256];
char *name = p->comm;
struct file *file = vma->vm_file;
- if (file) {
- char _tmpbuf[256];
- name = d_path(file->f_dentry,
- file->f_vfsmnt,
- _tmpbuf,
- sizeof(_tmpbuf));
- }
+
+ if (file)
+ name = d_path(&file->f_path, _tmpbuf,
+ sizeof(_tmpbuf));
/* FLAT does not have its text aligned to the start of
* the map while FDPIC ELF does ...
oops_in_progress = 1;
printk(KERN_EMERG "\n" KERN_EMERG "Double Fault\n");
dump_bfin_process(fp);
- dump_bfin_mem((void *)fp->retx);
+ dump_bfin_mem(fp);
show_regs(fp);
panic("Double Fault - unrecoverable event\n");
* we will kernel panic, so the system reboots.
* If KGDB is enabled, don't set this for kernel breakpoints
*/
- if ((bfin_read_IPEND() & 0xFFC0)
+
+ /* TODO: check to see if we are in some sort of deferred HWERR
+ * that we should be able to recover from, not kernel panic
+ */
+ if ((bfin_read_IPEND() & 0xFFC0) && (trapnr != VEC_STEP)
#ifdef CONFIG_KGDB
- && trapnr != VEC_EXCPT02
+ && (trapnr != VEC_EXCPT02)
#endif
){
console_verbose();
if (sig != SIGTRAP) {
unsigned long stack;
dump_bfin_process(fp);
- /* Is it an interrupt, or an exception? */
- if (trapnr == VEC_HWERR)
- dump_bfin_mem((void *)fp->pc);
- else
- dump_bfin_mem((void *)fp->retx);
+ dump_bfin_mem(fp);
show_regs(fp);
/* Print out the trace buffer if it makes sense */
dump_bfin_trace_buffer();
show_stack(current, &stack);
if (oops_in_progress) {
+ print_modules();
#ifndef CONFIG_ACCESS_CHECK
printk(KERN_EMERG "Please turn on "
"CONFIG_ACCESS_CHECK\n");
info.si_signo = sig;
info.si_errno = 0;
- info.si_addr = (void *)fp->pc;
+ info.si_addr = (void __user *)fp->pc;
force_sig_info(sig, &info, current);
trace_buffer_restore(j);
if (oops_in_progress)
printk(KERN_EMERG "Kernel OOPS in progress\n");
- if (context & 0x0020)
- printk(KERN_NOTICE "Deferred excecption or HW Error context\n");
+ if (context & 0x0020 && (fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR)
+ printk(KERN_NOTICE "HW Error context\n");
+ else if (context & 0x0020)
+ printk(KERN_NOTICE "Deferred Exception context\n");
else if (context & 0x3FC0)
printk(KERN_NOTICE "Interrupt context\n");
else if (context & 0x4000)
"No Valid process in current context\n");
}
-void dump_bfin_mem(void *retaddr)
+void dump_bfin_mem(struct pt_regs *fp)
{
+ unsigned short *addr, *erraddr, val = 0, err = 0;
+ char sti = 0, buf[6];
- if (retaddr >= (void *)FIXED_CODE_START && retaddr < (void *)physical_mem_end
-#if L1_CODE_LENGTH != 0
- /* FIXME: Copy the code out of L1 Instruction SRAM through dma
- memcpy. */
- && !(retaddr >= (void *)L1_CODE_START
- && retaddr < (void *)(L1_CODE_START + L1_CODE_LENGTH))
-#endif
- ) {
- int i = ((unsigned int)retaddr & 0xFFFFFFF0) - 32;
- unsigned short x = 0;
- printk(KERN_NOTICE "return address: [0x%p]; contents of:", retaddr);
- for (; i < ((unsigned int)retaddr & 0xFFFFFFF0) + 32; i += 2) {
- if (!(i & 0xF))
- printk("\n" KERN_NOTICE "0x%08x: ", i);
-
- if (get_user(x, (unsigned short *)i))
- break;
+ if (unlikely((fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR))
+ erraddr = (void *)fp->pc;
+ else
+ erraddr = (void *)fp->retx;
+
+ printk(KERN_NOTICE "return address: [0x%p]; contents of:", erraddr);
+
+ for (addr = (unsigned short *)((unsigned long)erraddr & ~0xF) - 0x10;
+ addr < (unsigned short *)((unsigned long)erraddr & ~0xF) + 0x10;
+ addr++) {
+ if (!((unsigned long)addr & 0xF))
+ printk("\n" KERN_NOTICE "0x%p: ", addr);
+
+ if (get_user(val, addr)) {
+ if (addr >= (unsigned short *)L1_CODE_START &&
+ addr < (unsigned short *)(L1_CODE_START + L1_CODE_LENGTH)) {
+ dma_memcpy(&val, addr, sizeof(val));
+ sprintf(buf, "%04x", val);
+ } else if (addr >= (unsigned short *)FIXED_CODE_START &&
+ addr <= (unsigned short *)memory_start) {
+ val = bfin_read16(addr);
+ sprintf(buf, "%04x", val);
+ } else {
+ val = 0;
+ sprintf(buf, "????");
+ }
+ } else
+ sprintf(buf, "%04x", val);
+
+ if (addr == erraddr) {
+ printk("[%s]", buf);
+ err = val;
+ } else
+ printk(" %s ", buf);
+
+ /* Do any previous instructions turn on interrupts? */
+ if (addr <= erraddr && /* in the past */
+ ((val >= 0x0040 && val <= 0x0047) || /* STI instruction */
+ val == 0x017b)) /* [SP++] = RETI */
+ sti = 1;
+ }
+
+ printk("\n");
+
+ /* Hardware error interrupts can be deferred */
+ if (unlikely(sti && (fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR &&
+ oops_in_progress)){
+ printk(KERN_NOTICE "Looks like this was a deferred error - sorry\n");
#ifndef CONFIG_DEBUG_HWERR
- /* If one of the last few instructions was a STI
- * it is likely that the error occured awhile ago
- * and we just noticed. This only happens in kernel
- * context, which should mean an oops is happening
- */
- if (oops_in_progress && x >= 0x0040 && x <= 0x0047 && i <= 0)
- printk(KERN_EMERG "\n"
- KERN_EMERG "WARNING : You should reconfigure"
- " the kernel to turn on\n"
- KERN_EMERG " 'Hardware error interrupt debugging'\n"
- KERN_EMERG " The rest of this error is meanless\n");
-#endif
- if (i == (unsigned int)retaddr)
- printk("[%04x]", x);
- else
- printk(" %04x ", x);
+ printk(KERN_NOTICE "The remaining message may be meaningless\n"
+ KERN_NOTICE "You should enable CONFIG_DEBUG_HWERR to get a"
+ " better idea where it came from\n");
+#else
+ /* If we are handling only one peripheral interrupt
+ * and current mm and pid are valid, and the last error
+ * was in that user space process's text area
+ * print it out - because that is where the problem exists
+ */
+ if ((!(((fp)->ipend & ~0x30) & (((fp)->ipend & ~0x30) - 1))) &&
+ (current->pid && current->mm)) {
+ /* And the last RETI points to the current userspace context */
+ if ((fp + 1)->pc >= current->mm->start_code &&
+ (fp + 1)->pc <= current->mm->end_code) {
+ printk(KERN_NOTICE "It might be better to look around here : \n");
+ printk(KERN_NOTICE "-------------------------------------------\n");
+ show_regs(fp + 1);
+ printk(KERN_NOTICE "-------------------------------------------\n");
+ }
}
- printk("\n");
- } else
- printk("\n" KERN_NOTICE
- "Cannot look at the [PC] <%p> for it is"
- " in unreadable memory - sorry\n", retaddr);
+#endif
+ }
}
void show_regs(struct pt_regs *fp)
unsigned int i;
unsigned long flags;
- printk(KERN_NOTICE "\n" KERN_NOTICE "SEQUENCER STATUS:\n");
+ printk(KERN_NOTICE "\n" KERN_NOTICE "SEQUENCER STATUS:\t\t%s\n", print_tainted());
printk(KERN_NOTICE " SEQSTAT: %08lx IPEND: %04lx SYSCFG: %04lx\n",
(long)fp->seqstat, fp->ipend, fp->syscfg);
printk(KERN_NOTICE " HWERRCAUSE: 0x%lx\n",
printk(KERN_EMERG "DCPLB_FAULT_ADDR=%p\n", (void *)bfin_read_DCPLB_FAULT_ADDR());
printk(KERN_EMERG "ICPLB_FAULT_ADDR=%p\n", (void *)bfin_read_ICPLB_FAULT_ADDR());
dump_bfin_process(fp);
- dump_bfin_mem((void *)fp->retx);
+ dump_bfin_mem(fp);
show_regs(fp);
dump_stack();
panic("Unrecoverable event\n");
git.openpandora.org / pandora-kernel.git / blobdiff