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Diffstat (limited to 'arch/arc/kernel/troubleshoot.c')
-rw-r--r--arch/arc/kernel/troubleshoot.c84
1 files changed, 48 insertions, 36 deletions
diff --git a/arch/arc/kernel/troubleshoot.c b/arch/arc/kernel/troubleshoot.c
index 7c10873c311..1badf9b84b5 100644
--- a/arch/arc/kernel/troubleshoot.c
+++ b/arch/arc/kernel/troubleshoot.c
@@ -26,7 +26,6 @@ static noinline void print_reg_file(long *reg_rev, int start_num)
char buf[512];
int n = 0, len = sizeof(buf);
- /* weird loop because pt_regs regs rev r12..r0, r25..r13 */
for (i = start_num; i < start_num + 13; i++) {
n += scnprintf(buf + n, len - n, "r%02u: 0x%08lx\t",
i, (unsigned long)*reg_rev);
@@ -34,13 +33,18 @@ static noinline void print_reg_file(long *reg_rev, int start_num)
if (((i + 1) % 3) == 0)
n += scnprintf(buf + n, len - n, "\n");
+ /* because pt_regs has regs reversed: r12..r0, r25..r13 */
reg_rev--;
}
if (start_num != 0)
n += scnprintf(buf + n, len - n, "\n\n");
- pr_info("%s", buf);
+ /* To continue printing callee regs on same line as scratch regs */
+ if (start_num == 0)
+ pr_info("%s", buf);
+ else
+ pr_cont("%s\n", buf);
}
static void show_callee_regs(struct callee_regs *cregs)
@@ -71,7 +75,7 @@ void print_task_path_n_nm(struct task_struct *tsk, char *buf)
}
done:
- pr_info("%s, TGID %u\n", path_nm, tsk->tgid);
+ pr_info("Path: %s\n", path_nm);
}
EXPORT_SYMBOL(print_task_path_n_nm);
@@ -82,8 +86,13 @@ static void show_faulting_vma(unsigned long address, char *buf)
unsigned long ino = 0;
dev_t dev = 0;
char *nm = buf;
+ struct mm_struct *active_mm = current->active_mm;
- vma = find_vma(current->active_mm, address);
+ /* can't use print_vma_addr() yet as it doesn't check for
+ * non-inclusive vma
+ */
+ down_read(&active_mm->mmap_sem);
+ vma = find_vma(active_mm, address);
/* check against the find_vma( ) behaviour which returns the next VMA
* if the container VMA is not found
@@ -93,36 +102,39 @@ static void show_faulting_vma(unsigned long address, char *buf)
if (file) {
struct path *path = &file->f_path;
nm = d_path(path, buf, PAGE_SIZE - 1);
- inode = vma->vm_file->f_path.dentry->d_inode;
+ inode = file_inode(vma->vm_file);
dev = inode->i_sb->s_dev;
ino = inode->i_ino;
}
pr_info(" @off 0x%lx in [%s]\n"
- " VMA: 0x%08lx to 0x%08lx\n\n",
- address - vma->vm_start, nm, vma->vm_start, vma->vm_end);
+ " VMA: 0x%08lx to 0x%08lx\n",
+ vma->vm_start < TASK_UNMAPPED_BASE ?
+ address : address - vma->vm_start,
+ nm, vma->vm_start, vma->vm_end);
} else
pr_info(" @No matching VMA found\n");
+
+ up_read(&active_mm->mmap_sem);
}
static void show_ecr_verbose(struct pt_regs *regs)
{
- unsigned int vec, cause_code, cause_reg;
+ unsigned int vec, cause_code;
unsigned long address;
- cause_reg = current->thread.cause_code;
- pr_info("\n[ECR]: 0x%08x => ", cause_reg);
+ pr_info("\n[ECR ]: 0x%08lx => ", regs->event);
/* For Data fault, this is data address not instruction addr */
address = current->thread.fault_address;
- vec = cause_reg >> 16;
- cause_code = (cause_reg >> 8) & 0xFF;
+ vec = regs->ecr_vec;
+ cause_code = regs->ecr_cause;
/* For DTLB Miss or ProtV, display the memory involved too */
if (vec == ECR_V_DTLB_MISS) {
- pr_cont("Invalid (%s) @ 0x%08lx by insn @ 0x%08lx\n",
- (cause_code == 0x01) ? "Read From" :
- ((cause_code == 0x02) ? "Write to" : "EX"),
+ pr_cont("Invalid %s @ 0x%08lx by insn @ 0x%08lx\n",
+ (cause_code == 0x01) ? "Read" :
+ ((cause_code == 0x02) ? "Write" : "EX"),
address, regs->ret);
} else if (vec == ECR_V_ITLB_MISS) {
pr_cont("Insn could not be fetched\n");
@@ -133,14 +145,12 @@ static void show_ecr_verbose(struct pt_regs *regs)
} else if (vec == ECR_V_PROTV) {
if (cause_code == ECR_C_PROTV_INST_FETCH)
pr_cont("Execute from Non-exec Page\n");
- else if (cause_code == ECR_C_PROTV_LOAD)
- pr_cont("Read from Non-readable Page\n");
- else if (cause_code == ECR_C_PROTV_STORE)
- pr_cont("Write to Non-writable Page\n");
- else if (cause_code == ECR_C_PROTV_XCHG)
- pr_cont("Data exchange protection violation\n");
else if (cause_code == ECR_C_PROTV_MISALIG_DATA)
pr_cont("Misaligned r/w from 0x%08lx\n", address);
+ else
+ pr_cont("%s access not allowed on page\n",
+ (cause_code == 0x01) ? "Read" :
+ ((cause_code == 0x02) ? "Write" : "EX"));
} else if (vec == ECR_V_INSN_ERR) {
pr_cont("Illegal Insn\n");
} else {
@@ -163,24 +173,27 @@ void show_regs(struct pt_regs *regs)
return;
print_task_path_n_nm(tsk, buf);
+ show_regs_print_info(KERN_INFO);
- if (current->thread.cause_code)
- show_ecr_verbose(regs);
+ show_ecr_verbose(regs);
- pr_info("[EFA]: 0x%08lx\n", current->thread.fault_address);
- pr_info("[ERET]: 0x%08lx (PC of Faulting Instr)\n", regs->ret);
+ pr_info("[EFA ]: 0x%08lx\n[BLINK ]: %pS\n[ERET ]: %pS\n",
+ current->thread.fault_address,
+ (void *)regs->blink, (void *)regs->ret);
- show_faulting_vma(regs->ret, buf); /* faulting code, not data */
+ if (user_mode(regs))
+ show_faulting_vma(regs->ret, buf); /* faulting code, not data */
- /* can't use print_vma_addr() yet as it doesn't check for
- * non-inclusive vma
- */
+ pr_info("[STAT32]: 0x%08lx", regs->status32);
+
+#define STS_BIT(r, bit) r->status32 & STATUS_##bit##_MASK ? #bit : ""
+ if (!user_mode(regs))
+ pr_cont(" : %2s %2s %2s %2s %2s\n",
+ STS_BIT(regs, AE), STS_BIT(regs, A2), STS_BIT(regs, A1),
+ STS_BIT(regs, E2), STS_BIT(regs, E1));
- /* print special regs */
- pr_info("status32: 0x%08lx\n", regs->status32);
- pr_info(" SP: 0x%08lx\tFP: 0x%08lx\n", regs->sp, regs->fp);
- pr_info("BTA: 0x%08lx\tBLINK: 0x%08lx\n",
- regs->bta, regs->blink);
+ pr_info("BTA: 0x%08lx\t SP: 0x%08lx\t FP: 0x%08lx\n",
+ regs->bta, regs->sp, regs->fp);
pr_info("LPS: 0x%08lx\tLPE: 0x%08lx\tLPC: 0x%08lx\n",
regs->lp_start, regs->lp_end, regs->lp_count);
@@ -198,10 +211,9 @@ void show_regs(struct pt_regs *regs)
}
void show_kernel_fault_diag(const char *str, struct pt_regs *regs,
- unsigned long address, unsigned long cause_reg)
+ unsigned long address)
{
current->thread.fault_address = address;
- current->thread.cause_code = cause_reg;
/* Caller and Callee regs */
show_regs(regs);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 04:05:26 +0000