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[PARISC] Generic BUG 

Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
This commit is contained in:
Helge Deller 2006-12-16 16:16:50 +01:00 committed by Kyle McMartin
parent 9f15c82686
commit 6891f8a113
5 changed files with 117 additions and 54 deletions
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5
arch/parisc/Kconfig
View File

@ -37,6 +37,11 @@ config GENERIC_FIND_NEXT_BIT
bool
default y
config GENERIC_BUG
bool
default y
depends on BUG
config GENERIC_HWEIGHT
bool
default y

4
arch/parisc/kernel/module.c
View File

@ -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);
}

87
arch/parisc/kernel/traps.c
View File

@ -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 @@ void show_stack(struct task_struct *task, unsigned long *s)
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;
unsigned iir = regs->iir;
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;
default:
#ifdef PRINT_USER_FAULTS
printk(KERN_DEBUG "break %#08x: pid=%d command='%s'\n",
iir, 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;
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);
}
}
#ifdef PRINT_USER_FAULTS
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
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:

2
arch/parisc/kernel/vmlinux.lds.S
View File

@ -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

73
include/asm-parisc/bug.h
View File

@ -1,14 +1,77 @@
#ifndef _PARISC_BUG_H
#define _PARISC_BUG_H
/*
* Tell the user there is some problem.
* The offending file and line are encoded in the __bug_table section.
*/
#ifdef CONFIG_BUG
#define HAVE_ARCH_BUG
#define BUG() do { \
printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \
dump_stack(); \
panic("BUG!"); \
} while (0)
#define HAVE_ARCH_WARN_ON
/* the break instruction is used as BUG() marker. */
#define PARISC_BUG_BREAK_ASM "break 0x1f, 0x1fff"
#define PARISC_BUG_BREAK_INSN 0x03ffe01f /* PARISC_BUG_BREAK_ASM */
#ifdef CONFIG_64BIT
#define ASM_ULONG_INSN ".dword"
#else
#define ASM_ULONG_INSN ".word"
#endif
#ifdef CONFIG_DEBUG_BUGVERBOSE
#define BUG() \
do { \
asm volatile("\n" \
"1:\t" PARISC_BUG_BREAK_ASM "\n" \
"\t.pushsection __bug_table,\"a\"\n" \
"2:\t" ASM_ULONG_INSN " 1b, %c0\n" \
"\t.short %c1, %c2\n" \
"\t.org 2b+%c3\n" \
"\t.popsection" \
: : "i" (__FILE__), "i" (__LINE__), \
"i" (0), "i" (sizeof(struct bug_entry)) ); \
for(;;) ; \
} while(0)
#else
#define BUG() \
do { \
asm volatile(PARISC_BUG_BREAK_ASM : : ); \
for(;;) ; \
} while(0)
#endif
#define __WARN() \
do { \
asm volatile("\n" \
"1:\t" PARISC_BUG_BREAK_ASM "\n" \
"\t.pushsection __bug_table,\"a\"\n" \
"2:\t" ASM_ULONG_INSN " 1b, %c0\n" \
"\t.short %c1, %c2\n" \
"\t.org 2b+%c3\n" \
"\t.popsection" \
: : "i" (__FILE__), "i" (__LINE__), \
"i" (BUGFLAG_WARNING), \
"i" (sizeof(struct bug_entry)) ); \
} while(0)
#define WARN_ON(x) ({ \
typeof(x) __ret_warn_on = (x); \
if (__builtin_constant_p(__ret_warn_on)) { \
if (__ret_warn_on) \
__WARN(); \
} else { \
if (unlikely(__ret_warn_on)) \
__WARN(); \
} \
unlikely(__ret_warn_on); \
})
#endif
#include <asm-generic/bug.h>
#endif