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Diffstat (limited to 'arch/blackfin/kernel/traps.c')
-rw-r--r--arch/blackfin/kernel/traps.c147
1 files changed, 86 insertions, 61 deletions
diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c
index cfa05436..21a55ef 100644
--- a/arch/blackfin/kernel/traps.c
+++ b/arch/blackfin/kernel/traps.c
@@ -158,7 +158,7 @@ static void decode_address(char *buf, unsigned long address)
}
/* we were unable to find this address anywhere */
- sprintf(buf, "[<0x%p>]", (void *)address);
+ sprintf(buf, "<0x%p> /* unknown address */", (void *)address);
done:
write_unlock_irqrestore(&tasklist_lock, flags);
@@ -169,7 +169,9 @@ asmlinkage void double_fault_c(struct pt_regs *fp)
console_verbose();
oops_in_progress = 1;
printk(KERN_EMERG "\n" KERN_EMERG "Double Fault\n");
- dump_bfin_regs(fp, (void *)fp->retx);
+ dump_bfin_process(fp);
+ dump_bfin_mem((void *)fp->retx);
+ show_regs(fp);
panic("Double Fault - unrecoverable event\n");
}
@@ -250,7 +252,7 @@ asmlinkage void trap_c(struct pt_regs *fp)
case VEC_EXCPT03:
info.si_code = SEGV_STACKFLOW;
sig = SIGSEGV;
- printk(KERN_NOTICE EXC_0x03);
+ printk(KERN_NOTICE EXC_0x03(KERN_NOTICE));
CHK_DEBUGGER_TRAP();
break;
/* 0x04 - User Defined, Caught by default */
@@ -279,7 +281,7 @@ asmlinkage void trap_c(struct pt_regs *fp)
case VEC_OVFLOW:
info.si_code = TRAP_TRACEFLOW;
sig = SIGTRAP;
- printk(KERN_NOTICE EXC_0x11);
+ printk(KERN_NOTICE EXC_0x11(KERN_NOTICE));
CHK_DEBUGGER_TRAP();
break;
/* 0x12 - Reserved, Caught by default */
@@ -301,36 +303,35 @@ asmlinkage void trap_c(struct pt_regs *fp)
case VEC_UNDEF_I:
info.si_code = ILL_ILLOPC;
sig = SIGILL;
- printk(KERN_NOTICE EXC_0x21);
+ printk(KERN_NOTICE EXC_0x21(KERN_NOTICE));
CHK_DEBUGGER_TRAP();
break;
/* 0x22 - Illegal Instruction Combination, handled here */
case VEC_ILGAL_I:
info.si_code = ILL_ILLPARAOP;
sig = SIGILL;
- printk(KERN_NOTICE EXC_0x22);
+ printk(KERN_NOTICE EXC_0x22(KERN_NOTICE));
CHK_DEBUGGER_TRAP();
break;
- /* 0x23 - Data CPLB Protection Violation,
- normal case is handled in _cplb_hdr */
+ /* 0x23 - Data CPLB protection violation, handled here */
case VEC_CPLB_VL:
info.si_code = ILL_CPLB_VI;
- sig = SIGILL;
- printk(KERN_NOTICE EXC_0x23);
+ sig = SIGBUS;
+ printk(KERN_NOTICE EXC_0x23(KERN_NOTICE));
CHK_DEBUGGER_TRAP();
break;
/* 0x24 - Data access misaligned, handled here */
case VEC_MISALI_D:
info.si_code = BUS_ADRALN;
sig = SIGBUS;
- printk(KERN_NOTICE EXC_0x24);
+ printk(KERN_NOTICE EXC_0x24(KERN_NOTICE));
CHK_DEBUGGER_TRAP();
break;
/* 0x25 - Unrecoverable Event, handled here */
case VEC_UNCOV:
info.si_code = ILL_ILLEXCPT;
sig = SIGILL;
- printk(KERN_NOTICE EXC_0x25);
+ printk(KERN_NOTICE EXC_0x25(KERN_NOTICE));
CHK_DEBUGGER_TRAP();
break;
/* 0x26 - Data CPLB Miss, normal case is handled in _cplb_hdr,
@@ -338,7 +339,7 @@ asmlinkage void trap_c(struct pt_regs *fp)
case VEC_CPLB_M:
info.si_code = BUS_ADRALN;
sig = SIGBUS;
- printk(KERN_NOTICE EXC_0x26);
+ printk(KERN_NOTICE EXC_0x26(KERN_NOTICE));
CHK_DEBUGGER_TRAP();
break;
/* 0x27 - Data CPLB Multiple Hits - Linux Trap Zero, handled here */
@@ -349,7 +350,7 @@ asmlinkage void trap_c(struct pt_regs *fp)
printk(KERN_NOTICE "NULL pointer access (probably)\n");
#else
sig = SIGILL;
- printk(KERN_NOTICE EXC_0x27);
+ printk(KERN_NOTICE EXC_0x27(KERN_NOTICE));
#endif
CHK_DEBUGGER_TRAP();
break;
@@ -357,7 +358,7 @@ asmlinkage void trap_c(struct pt_regs *fp)
case VEC_WATCH:
info.si_code = TRAP_WATCHPT;
sig = SIGTRAP;
- pr_debug(EXC_0x28);
+ pr_debug(EXC_0x28(KERN_DEBUG));
CHK_DEBUGGER_TRAP_MAYBE();
/* Check if this is a watchpoint in kernel space */
if (fp->ipend & 0xffc0)
@@ -379,22 +380,21 @@ asmlinkage void trap_c(struct pt_regs *fp)
case VEC_MISALI_I:
info.si_code = BUS_ADRALN;
sig = SIGBUS;
- printk(KERN_NOTICE EXC_0x2A);
+ printk(KERN_NOTICE EXC_0x2A(KERN_NOTICE));
CHK_DEBUGGER_TRAP();
break;
- /* 0x2B - Instruction CPLB protection Violation,
- handled in _cplb_hdr */
+ /* 0x2B - Instruction CPLB protection violation, handled here */
case VEC_CPLB_I_VL:
info.si_code = ILL_CPLB_VI;
- sig = SIGILL;
- printk(KERN_NOTICE EXC_0x2B);
+ sig = SIGBUS;
+ printk(KERN_NOTICE EXC_0x2B(KERN_NOTICE));
CHK_DEBUGGER_TRAP();
break;
/* 0x2C - Instruction CPLB miss, handled in _cplb_hdr */
case VEC_CPLB_I_M:
info.si_code = ILL_CPLB_MISS;
sig = SIGBUS;
- printk(KERN_NOTICE EXC_0x2C);
+ printk(KERN_NOTICE EXC_0x2C(KERN_NOTICE));
CHK_DEBUGGER_TRAP();
break;
/* 0x2D - Instruction CPLB Multiple Hits, handled here */
@@ -405,7 +405,7 @@ asmlinkage void trap_c(struct pt_regs *fp)
printk(KERN_NOTICE "Jump to address 0 - 0x0fff\n");
#else
sig = SIGILL;
- printk(KERN_NOTICE EXC_0x2D);
+ printk(KERN_NOTICE EXC_0x2D(KERN_NOTICE));
#endif
CHK_DEBUGGER_TRAP();
break;
@@ -413,7 +413,7 @@ asmlinkage void trap_c(struct pt_regs *fp)
case VEC_ILL_RES:
info.si_code = ILL_PRVOPC;
sig = SIGILL;
- printk(KERN_NOTICE EXC_0x2E);
+ printk(KERN_NOTICE EXC_0x2E(KERN_NOTICE));
CHK_DEBUGGER_TRAP();
break;
/* 0x2F - Reserved, Caught by default */
@@ -446,7 +446,9 @@ asmlinkage void trap_c(struct pt_regs *fp)
if (sig != SIGTRAP) {
unsigned long stack;
- dump_bfin_regs(fp, (void *)fp->retx);
+ dump_bfin_process(fp);
+ dump_bfin_mem((void *)fp->retx);
+ show_regs(fp);
/* Print out the trace buffer if it makes sense */
#ifndef CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE
@@ -460,22 +462,25 @@ asmlinkage void trap_c(struct pt_regs *fp)
show_stack(current, &stack);
if (oops_in_progress) {
#ifndef CONFIG_ACCESS_CHECK
- printk(KERN_EMERG "Hey - dork - please turn on "
- "CONFIG_ACCESS_CHECK\n");
+ printk(KERN_EMERG "Please turn on "
+ "CONFIG_ACCESS_CHECK\n");
#endif
panic("Kernel exception");
}
-
- /* Ensure that bad return addresses don't end up in an infinite
- * loop, due to speculative loads/reads
- */
- fp->pc = SAFE_USER_INSTRUCTION;
}
+
info.si_signo = sig;
info.si_errno = 0;
info.si_addr = (void *)fp->pc;
force_sig_info(sig, &info, current);
+ /* Ensure that bad return addresses don't end up in an infinite
+ * loop, due to speculative loads/reads. This needs to be done after
+ * the signal has been sent.
+ */
+ if (trapnr == VEC_CPLB_I_M && sig != SIGTRAP)
+ fp->pc = SAFE_USER_INSTRUCTION;
+
trace_buffer_restore(j);
return;
}
@@ -600,37 +605,48 @@ void dump_stack(void)
show_stack(current, &stack);
trace_buffer_restore(tflags);
}
-
EXPORT_SYMBOL(dump_stack);
-void dump_bfin_regs(struct pt_regs *fp, void *retaddr)
+void dump_bfin_process(struct pt_regs *fp)
{
- char buf [150];
+ /* We should be able to look at fp->ipend, but we don't push it on the
+ * stack all the time, so do this until we fix that */
+ unsigned int context = bfin_read_IPEND();
+
+ 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");
+ else if (context & 0x3FC0)
+ printk(KERN_NOTICE "Interrupt context\n");
+ else if (context & 0x4000)
+ printk(KERN_NOTICE "Deferred Interrupt context\n");
+ else if (context & 0x8000)
+ printk(KERN_NOTICE "Kernel process context\n");
+
+ if (current->pid && current->mm) {
+ printk(KERN_NOTICE "CURRENT PROCESS:\n");
+ printk(KERN_NOTICE "COMM=%s PID=%d\n",
+ current->comm, current->pid);
+
+ printk(KERN_NOTICE "TEXT = 0x%p-0x%p DATA = 0x%p-0x%p\n"
+ KERN_NOTICE "BSS = 0x%p-0x%p USER-STACK = 0x%p\n"
+ KERN_NOTICE "\n",
+ (void *)current->mm->start_code,
+ (void *)current->mm->end_code,
+ (void *)current->mm->start_data,
+ (void *)current->mm->end_data,
+ (void *)current->mm->end_data,
+ (void *)current->mm->brk,
+ (void *)current->mm->start_stack);
+ } else
+ printk(KERN_NOTICE "\n" KERN_NOTICE
+ "No Valid process in current context\n");
+}
- if (!oops_in_progress) {
- if (current->pid && current->mm) {
- printk(KERN_NOTICE "\n" KERN_NOTICE "CURRENT PROCESS:\n");
- printk(KERN_NOTICE "COMM=%s PID=%d\n",
- current->comm, current->pid);
-
- printk(KERN_NOTICE "TEXT = 0x%p-0x%p DATA = 0x%p-0x%p\n"
- KERN_NOTICE "BSS = 0x%p-0x%p USER-STACK = 0x%p\n"
- KERN_NOTICE "\n",
- (void *)current->mm->start_code,
- (void *)current->mm->end_code,
- (void *)current->mm->start_data,
- (void *)current->mm->end_data,
- (void *)current->mm->end_data,
- (void *)current->mm->brk,
- (void *)current->mm->start_stack);
- } else {
- printk (KERN_NOTICE "\n" KERN_NOTICE
- "No Valid pid - Either things are really messed up,"
- " or you are in the kernel\n");
- }
- } else {
- printk(KERN_NOTICE "Kernel or interrupt exception\n");
- }
+void dump_bfin_mem(void *retaddr)
+{
if (retaddr >= (void *)FIXED_CODE_START && retaddr < (void *)physical_mem_end
#if L1_CODE_LENGTH != 0
@@ -671,8 +687,13 @@ void dump_bfin_regs(struct pt_regs *fp, void *retaddr)
printk("\n");
} else
printk("\n" KERN_NOTICE
- "Cannot look at the [PC] for it is"
- " in unreadable memory - sorry\n");
+ "Cannot look at the [PC] <%p> for it is"
+ " in unreadable memory - sorry\n", retaddr);
+}
+
+void show_regs(struct pt_regs *fp)
+{
+ char buf [150];
printk(KERN_NOTICE "\n" KERN_NOTICE "SEQUENCER STATUS:\n");
printk(KERN_NOTICE " SEQSTAT: %08lx IPEND: %04lx SYSCFG: %04lx\n",
@@ -686,6 +707,8 @@ void dump_bfin_regs(struct pt_regs *fp, void *retaddr)
printk(KERN_NOTICE " RETX: %s\n", buf);
decode_address(buf, fp->rets);
printk(KERN_NOTICE " RETS: %s\n", buf);
+ decode_address(buf, fp->pc);
+ printk(KERN_NOTICE " PC: %s\n", buf);
if ((long)fp->seqstat & SEQSTAT_EXCAUSE) {
decode_address(buf, bfin_read_DCPLB_FAULT_ADDR());
@@ -800,7 +823,9 @@ void panic_cplb_error(int cplb_panic, struct pt_regs *fp)
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_regs(fp, (void *)fp->retx);
+ dump_bfin_process(fp);
+ dump_bfin_mem((void *)fp->retx);
+ show_regs(fp);
dump_stack();
panic("Unrecoverable event\n");
}
generated by cgit v0.10.2 at 2024-09-16 22:01:53 (GMT)