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-rw-r--r--arch/parisc/kernel/module.c4
-rw-r--r--arch/parisc/kernel/traps.c85
-rw-r--r--arch/parisc/kernel/vmlinux.lds.S2
3 files changed, 43 insertions, 48 deletions
diff --git a/arch/parisc/kernel/module.c b/arch/parisc/kernel/module.c
index 47ea4e4a217..1808f857a73 100644
--- a/arch/parisc/kernel/module.c
+++ b/arch/parisc/kernel/module.c
@@ -46,6 +46,7 @@
#include <linux/fs.h>
#include <linux/string.h>
#include <linux/kernel.h>
+#include <linux/bug.h>
#include <asm/unwind.h>
@@ -851,10 +852,11 @@ int module_finalize(const Elf_Ehdr *hdr,
nsyms = newptr - (Elf_Sym *)symhdr->sh_addr;
DEBUGP("NEW num_symtab %lu\n", nsyms);
symhdr->sh_size = nsyms * sizeof(Elf_Sym);
- return 0;
+ return module_bug_finalize(hdr, sechdrs, me);
}
void module_arch_cleanup(struct module *mod)
{
deregister_unwind_table(mod);
+ module_bug_cleanup(mod);
}
diff --git a/arch/parisc/kernel/traps.c b/arch/parisc/kernel/traps.c
index 94972254086..ea0eff91db4 100644
--- a/arch/parisc/kernel/traps.c
+++ b/arch/parisc/kernel/traps.c
@@ -26,6 +26,7 @@
#include <linux/interrupt.h>
#include <linux/console.h>
#include <linux/kallsyms.h>
+#include <linux/bug.h>
#include <asm/assembly.h>
#include <asm/system.h>
@@ -51,7 +52,7 @@
DEFINE_SPINLOCK(pa_dbit_lock);
#endif
-int printbinary(char *buf, unsigned long x, int nbits)
+static int printbinary(char *buf, unsigned long x, int nbits)
{
unsigned long mask = 1UL << (nbits - 1);
while (mask != 0) {
@@ -207,6 +208,11 @@ HERE:
do_show_stack(&info);
}
+int is_valid_bugaddr(unsigned long iaoq)
+{
+ return 1;
+}
+
void die_if_kernel(char *str, struct pt_regs *regs, long err)
{
if (user_mode(regs)) {
@@ -225,7 +231,7 @@ void die_if_kernel(char *str, struct pt_regs *regs, long err)
oops_in_progress = 1;
/* Amuse the user in a SPARC fashion */
- printk(
+ if (err) printk(
" _______________________________ \n"
" < Your System ate a SPARC! Gah! >\n"
" ------------------------------- \n"
@@ -245,8 +251,9 @@ void die_if_kernel(char *str, struct pt_regs *regs, long err)
if (!console_drivers)
pdc_console_restart();
- printk(KERN_CRIT "%s (pid %d): %s (code %ld)\n",
- current->comm, current->pid, str, err);
+ if (err)
+ printk(KERN_CRIT "%s (pid %d): %s (code %ld)\n",
+ current->comm, current->pid, str, err);
show_regs(regs);
if (in_interrupt())
@@ -276,61 +283,45 @@ int syscall_ipi(int (*syscall) (struct pt_regs *), struct pt_regs *regs)
/* gdb uses break 4,8 */
#define GDB_BREAK_INSN 0x10004
-void handle_gdb_break(struct pt_regs *regs, int wot)
+static void handle_gdb_break(struct pt_regs *regs, int wot)
{
struct siginfo si;
- si.si_code = wot;
- si.si_addr = (void __user *) (regs->iaoq[0] & ~3);
si.si_signo = SIGTRAP;
si.si_errno = 0;
+ si.si_code = wot;
+ si.si_addr = (void __user *) (regs->iaoq[0] & ~3);
force_sig_info(SIGTRAP, &si, current);
}
-void handle_break(unsigned iir, struct pt_regs *regs)
+static void handle_break(struct pt_regs *regs)
{
- struct siginfo si;
-
- switch(iir) {
- case 0x00:
-#ifdef PRINT_USER_FAULTS
- printk(KERN_DEBUG "break 0,0: pid=%d command='%s'\n",
- current->pid, current->comm);
-#endif
- die_if_kernel("Breakpoint", regs, 0);
-#ifdef PRINT_USER_FAULTS
- show_regs(regs);
-#endif
- si.si_code = TRAP_BRKPT;
- si.si_addr = (void __user *) (regs->iaoq[0] & ~3);
- si.si_signo = SIGTRAP;
- force_sig_info(SIGTRAP, &si, current);
- break;
-
- case GDB_BREAK_INSN:
- die_if_kernel("Breakpoint", regs, 0);
- handle_gdb_break(regs, TRAP_BRKPT);
- break;
+ unsigned iir = regs->iir;
+
+ if (unlikely(iir == PARISC_BUG_BREAK_INSN && !user_mode(regs))) {
+ /* check if a BUG() or WARN() trapped here. */
+ enum bug_trap_type tt;
+ tt = report_bug(regs->iaoq[0] & ~3);
+ if (tt == BUG_TRAP_TYPE_WARN) {
+ regs->iaoq[0] += 4;
+ regs->iaoq[1] += 4;
+ return; /* return to next instruction when WARN_ON(). */
+ }
+ die_if_kernel("Unknown kernel breakpoint", regs,
+ (tt == BUG_TRAP_TYPE_NONE) ? 9 : 0);
+ }
- default:
#ifdef PRINT_USER_FAULTS
- printk(KERN_DEBUG "break %#08x: pid=%d command='%s'\n",
- iir, current->pid, current->comm);
+ if (unlikely(iir != GDB_BREAK_INSN)) {
+ printk(KERN_DEBUG "break %d,%d: pid=%d command='%s'\n",
+ (iir>>13) & ((1<<13)-1), iir & 31,
+ current->pid, current->comm);
show_regs(regs);
-#endif
- si.si_signo = SIGTRAP;
- si.si_code = TRAP_BRKPT;
- si.si_addr = (void __user *) (regs->iaoq[0] & ~3);
- force_sig_info(SIGTRAP, &si, current);
- return;
}
-}
-
+#endif
-int handle_toc(void)
-{
- printk(KERN_CRIT "TOC call.\n");
- return 0;
+ /* send standard GDB signal */
+ handle_gdb_break(regs, TRAP_BRKPT);
}
static void default_trap(int code, struct pt_regs *regs)
@@ -339,7 +330,7 @@ static void default_trap(int code, struct pt_regs *regs)
show_regs(regs);
}
-void (*cpu_lpmc) (int code, struct pt_regs *regs) = default_trap;
+void (*cpu_lpmc) (int code, struct pt_regs *regs) __read_mostly = default_trap;
void transfer_pim_to_trap_frame(struct pt_regs *regs)
@@ -576,7 +567,7 @@ void handle_interruption(int code, struct pt_regs *regs)
case 9:
/* Break instruction trap */
- handle_break(regs->iir,regs);
+ handle_break(regs);
return;
case 10:
diff --git a/arch/parisc/kernel/vmlinux.lds.S b/arch/parisc/kernel/vmlinux.lds.S
index 7b943b45f7c..7b149df9d42 100644
--- a/arch/parisc/kernel/vmlinux.lds.S
+++ b/arch/parisc/kernel/vmlinux.lds.S
@@ -68,6 +68,8 @@ SECTIONS
RODATA
+ BUG_TABLE
+
/* writeable */
. = ALIGN(ASM_PAGE_SIZE); /* Make sure this is page aligned so
that we can properly leave these
generated by cgit (git 2.34.1) at 2024-11-20 15:35:33 +0000