*/
#include <linux/kernel.h>
#include <linux/ptrace.h>
+#include <linux/hardirq.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/module.h>
#include <linux/kdebug.h>
#include <linux/kexec.h>
#include <linux/limits.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/sysfs.h>
#include <asm/system.h>
#include <asm/uaccess.h>
-
-#ifdef CONFIG_SH_KGDB
-#include <asm/kgdb.h>
-#define CHK_REMOTE_DEBUG(regs) \
-{ \
- if (kgdb_debug_hook && !user_mode(regs))\
- (*kgdb_debug_hook)(regs); \
-}
-#else
-#define CHK_REMOTE_DEBUG(regs)
-#endif
+#include <asm/fpu.h>
+#include <asm/kprobes.h>
#ifdef CONFIG_CPU_SH2
# define TRAP_RESERVED_INST 4
# define TRAP_ILLEGAL_SLOT_INST 6
# define TRAP_ADDRESS_ERROR 9
# ifdef CONFIG_CPU_SH2A
+# define TRAP_UBC 12
+# define TRAP_FPU_ERROR 13
# define TRAP_DIVZERO_ERROR 17
# define TRAP_DIVOVF_ERROR 18
# endif
#define TRAP_ILLEGAL_SLOT_INST 13
#endif
+static unsigned long se_user;
+static unsigned long se_sys;
+static unsigned long se_half;
+static unsigned long se_word;
+static unsigned long se_dword;
+static unsigned long se_multi;
+/* bitfield: 1: warn 2: fixup 4: signal -> combinations 2|4 && 1|2|4 are not
+ valid! */
+static int se_usermode = 3;
+/* 0: no warning 1: print a warning message, disabled by default */
+static int se_kernmode_warn;
+
+#ifdef CONFIG_PROC_FS
+static const char *se_usermode_action[] = {
+ "ignored",
+ "warn",
+ "fixup",
+ "fixup+warn",
+ "signal",
+ "signal+warn"
+};
+
+static int alignment_proc_show(struct seq_file *m, void *v)
+{
+ seq_printf(m, "User:\t\t%lu\n", se_user);
+ seq_printf(m, "System:\t\t%lu\n", se_sys);
+ seq_printf(m, "Half:\t\t%lu\n", se_half);
+ seq_printf(m, "Word:\t\t%lu\n", se_word);
+ seq_printf(m, "DWord:\t\t%lu\n", se_dword);
+ seq_printf(m, "Multi:\t\t%lu\n", se_multi);
+ seq_printf(m, "User faults:\t%i (%s)\n", se_usermode,
+ se_usermode_action[se_usermode]);
+ seq_printf(m, "Kernel faults:\t%i (fixup%s)\n", se_kernmode_warn,
+ se_kernmode_warn ? "+warn" : "");
+ return 0;
+}
+
+static int alignment_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, alignment_proc_show, NULL);
+}
+
+static ssize_t alignment_proc_write(struct file *file,
+ const char __user *buffer, size_t count, loff_t *pos)
+{
+ int *data = PDE(file->f_path.dentry->d_inode)->data;
+ char mode;
+
+ if (count > 0) {
+ if (get_user(mode, buffer))
+ return -EFAULT;
+ if (mode >= '0' && mode <= '5')
+ *data = mode - '0';
+ }
+ return count;
+}
+
+static const struct file_operations alignment_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = alignment_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = alignment_proc_write,
+};
+#endif
+
static void dump_mem(const char *str, unsigned long bottom, unsigned long top)
{
unsigned long p;
oops_enter();
- console_verbose();
spin_lock_irq(&die_lock);
+ console_verbose();
bust_spinlocks(1);
printk("%s: %04lx [#%d]\n", str, err & 0xffff, ++die_counter);
-
- CHK_REMOTE_DEBUG(regs);
+ sysfs_printk_last_file();
print_modules();
show_regs(regs);
dump_mem("Stack: ", regs->regs[15], THREAD_SIZE +
(unsigned long)task_stack_page(current));
+ notify_die(DIE_OOPS, str, regs, err, 255, SIGSEGV);
+
bust_spinlocks(0);
add_taint(TAINT_DIE);
spin_unlock_irq(&die_lock);
+ oops_exit();
if (kexec_should_crash(current))
crash_kexec(regs);
if (panic_on_oops)
panic("Fatal exception");
- oops_exit();
do_exit(SIGSEGV);
}
* - userspace errors just cause EFAULT to be returned, resulting in SEGV
* - kernel/userspace interfaces cause a jump to an appropriate handler
* - other kernel errors are bad
- * - return 0 if fixed-up, -EFAULT if non-fatal (to the kernel) fault
*/
-static int die_if_no_fixup(const char * str, struct pt_regs * regs, long err)
+static void die_if_no_fixup(const char * str, struct pt_regs * regs, long err)
{
if (!user_mode(regs)) {
const struct exception_table_entry *fixup;
fixup = search_exception_tables(regs->pc);
if (fixup) {
regs->pc = fixup->fixup;
- return 0;
+ return;
}
+
die(str, regs, err);
}
- return -EFAULT;
}
static inline void sign_extend(unsigned int count, unsigned char *dst)
#endif
}
+static struct mem_access user_mem_access = {
+ copy_from_user,
+ copy_to_user,
+};
+
/*
* handle an instruction that does an unaligned memory access by emulating the
* desired behaviour
* (if that instruction is in a branch delay slot)
* - return 0 if emulation okay, -EFAULT on existential error
*/
-static int handle_unaligned_ins(opcode_t instruction, struct pt_regs *regs)
+static int handle_unaligned_ins(insn_size_t instruction, struct pt_regs *regs,
+ struct mem_access *ma)
{
int ret, index, count;
unsigned long *rm, *rn;
unsigned char *src, *dst;
+ unsigned char __user *srcu, *dstu;
index = (instruction>>8)&15; /* 0x0F00 */
rn = ®s->regs[index];
count = 1<<(instruction&3);
+ switch (count) {
+ case 1: se_half += 1; break;
+ case 2: se_word += 1; break;
+ case 4: se_dword += 1; break;
+ case 8: se_multi += 1; break; /* ??? */
+ }
+
ret = -EFAULT;
switch (instruction>>12) {
case 0: /* mov.[bwl] to/from memory via r0+rn */
if (instruction & 8) {
/* from memory */
- src = (unsigned char*) *rm;
- src += regs->regs[0];
- dst = (unsigned char*) rn;
- *(unsigned long*)dst = 0;
+ srcu = (unsigned char __user *)*rm;
+ srcu += regs->regs[0];
+ dst = (unsigned char *)rn;
+ *(unsigned long *)dst = 0;
#if !defined(__LITTLE_ENDIAN__)
dst += 4-count;
#endif
- if (copy_from_user(dst, src, count))
+ if (ma->from(dst, srcu, count))
goto fetch_fault;
sign_extend(count, dst);
} else {
/* to memory */
- src = (unsigned char*) rm;
+ src = (unsigned char *)rm;
#if !defined(__LITTLE_ENDIAN__)
src += 4-count;
#endif
- dst = (unsigned char*) *rn;
- dst += regs->regs[0];
+ dstu = (unsigned char __user *)*rn;
+ dstu += regs->regs[0];
- if (copy_to_user(dst, src, count))
+ if (ma->to(dstu, src, count))
goto fetch_fault;
}
ret = 0;
case 1: /* mov.l Rm,@(disp,Rn) */
src = (unsigned char*) rm;
- dst = (unsigned char*) *rn;
- dst += (instruction&0x000F)<<2;
+ dstu = (unsigned char __user *)*rn;
+ dstu += (instruction&0x000F)<<2;
- if (copy_to_user(dst,src,4))
+ if (ma->to(dstu, src, 4))
goto fetch_fault;
ret = 0;
break;
if (instruction & 4)
*rn -= count;
src = (unsigned char*) rm;
- dst = (unsigned char*) *rn;
+ dstu = (unsigned char __user *)*rn;
#if !defined(__LITTLE_ENDIAN__)
src += 4-count;
#endif
- if (copy_to_user(dst, src, count))
+ if (ma->to(dstu, src, count))
goto fetch_fault;
ret = 0;
break;
case 5: /* mov.l @(disp,Rm),Rn */
- src = (unsigned char*) *rm;
- src += (instruction&0x000F)<<2;
- dst = (unsigned char*) rn;
- *(unsigned long*)dst = 0;
+ srcu = (unsigned char __user *)*rm;
+ srcu += (instruction & 0x000F) << 2;
+ dst = (unsigned char *)rn;
+ *(unsigned long *)dst = 0;
- if (copy_from_user(dst,src,4))
+ if (ma->from(dst, srcu, 4))
goto fetch_fault;
ret = 0;
break;
case 6: /* mov.[bwl] from memory, possibly with post-increment */
- src = (unsigned char*) *rm;
+ srcu = (unsigned char __user *)*rm;
if (instruction & 4)
*rm += count;
dst = (unsigned char*) rn;
#if !defined(__LITTLE_ENDIAN__)
dst += 4-count;
#endif
- if (copy_from_user(dst, src, count))
+ if (ma->from(dst, srcu, count))
goto fetch_fault;
sign_extend(count, dst);
ret = 0;
case 8:
switch ((instruction&0xFF00)>>8) {
case 0x81: /* mov.w R0,@(disp,Rn) */
- src = (unsigned char*) ®s->regs[0];
+ src = (unsigned char *) ®s->regs[0];
#if !defined(__LITTLE_ENDIAN__)
src += 2;
#endif
- dst = (unsigned char*) *rm; /* called Rn in the spec */
- dst += (instruction&0x000F)<<1;
+ dstu = (unsigned char __user *)*rm; /* called Rn in the spec */
+ dstu += (instruction & 0x000F) << 1;
- if (copy_to_user(dst, src, 2))
+ if (ma->to(dstu, src, 2))
goto fetch_fault;
ret = 0;
break;
case 0x85: /* mov.w @(disp,Rm),R0 */
- src = (unsigned char*) *rm;
- src += (instruction&0x000F)<<1;
- dst = (unsigned char*) ®s->regs[0];
- *(unsigned long*)dst = 0;
+ srcu = (unsigned char __user *)*rm;
+ srcu += (instruction & 0x000F) << 1;
+ dst = (unsigned char *) ®s->regs[0];
+ *(unsigned long *)dst = 0;
#if !defined(__LITTLE_ENDIAN__)
dst += 2;
#endif
- if (copy_from_user(dst, src, 2))
+ if (ma->from(dst, srcu, 2))
goto fetch_fault;
sign_extend(2, dst);
ret = 0;
/* Argh. Address not only misaligned but also non-existent.
* Raise an EFAULT and see if it's trapped
*/
- return die_if_no_fixup("Fault in unaligned fixup", regs, 0);
+ die_if_no_fixup("Fault in unaligned fixup", regs, 0);
+ return -EFAULT;
}
/*
* emulate the instruction in the delay slot
* - fetches the instruction from PC+2
*/
-static inline int handle_unaligned_delayslot(struct pt_regs *regs,
- opcode_t old_instruction)
+static inline int handle_delayslot(struct pt_regs *regs,
+ insn_size_t old_instruction,
+ struct mem_access *ma)
{
- opcode_t instruction;
- void *addr = (void *)(regs->pc + instruction_size(old_instruction));
+ insn_size_t instruction;
+ void __user *addr = (void __user *)(regs->pc +
+ instruction_size(old_instruction));
if (copy_from_user(&instruction, addr, sizeof(instruction))) {
/* the instruction-fetch faulted */
regs, 0);
}
- return handle_unaligned_ins(instruction, regs);
+ return handle_unaligned_ins(instruction, regs, ma);
}
/*
#define SH_PC_8BIT_OFFSET(instr) ((((signed char)(instr))*2) + 4)
#define SH_PC_12BIT_OFFSET(instr) ((((signed short)(instr<<4))>>3) + 4)
-/*
- * XXX: SH-2A needs this too, but it needs an overhaul thanks to mixed 32-bit
- * opcodes..
- */
-
-static int handle_unaligned_notify_count = 10;
-
-static int handle_unaligned_access(opcode_t instruction, struct pt_regs *regs)
+int handle_unaligned_access(insn_size_t instruction, struct pt_regs *regs,
+ struct mem_access *ma, int expected)
{
u_int rm;
int ret, index;
+ /*
+ * XXX: We can't handle mixed 16/32-bit instructions yet
+ */
+ if (instruction_size(instruction) != 2)
+ return -EINVAL;
+
index = (instruction>>8)&15; /* 0x0F00 */
rm = regs->regs[index];
- /* shout about the first ten userspace fixups */
- if (user_mode(regs) && handle_unaligned_notify_count>0) {
- handle_unaligned_notify_count--;
-
- printk(KERN_NOTICE "Fixing up unaligned userspace access "
+ /* shout about fixups */
+ if (!expected && printk_ratelimit())
+ printk(KERN_NOTICE "Fixing up unaligned %s access "
"in \"%s\" pid=%d pc=0x%p ins=0x%04hx\n",
+ user_mode(regs) ? "userspace" : "kernel",
current->comm, task_pid_nr(current),
(void *)regs->pc, instruction);
- }
ret = -EFAULT;
switch (instruction&0xF000) {
case 0x0000:
if (instruction==0x000B) {
/* rts */
- ret = handle_unaligned_delayslot(regs, instruction);
+ ret = handle_delayslot(regs, instruction, ma);
if (ret==0)
regs->pc = regs->pr;
}
else if ((instruction&0x00FF)==0x0023) {
/* braf @Rm */
- ret = handle_unaligned_delayslot(regs, instruction);
+ ret = handle_delayslot(regs, instruction, ma);
if (ret==0)
regs->pc += rm + 4;
}
else if ((instruction&0x00FF)==0x0003) {
/* bsrf @Rm */
- ret = handle_unaligned_delayslot(regs, instruction);
+ ret = handle_delayslot(regs, instruction, ma);
if (ret==0) {
regs->pr = regs->pc + 4;
regs->pc += rm + 4;
case 0x4000:
if ((instruction&0x00FF)==0x002B) {
/* jmp @Rm */
- ret = handle_unaligned_delayslot(regs, instruction);
+ ret = handle_delayslot(regs, instruction, ma);
if (ret==0)
regs->pc = rm;
}
else if ((instruction&0x00FF)==0x000B) {
/* jsr @Rm */
- ret = handle_unaligned_delayslot(regs, instruction);
+ ret = handle_delayslot(regs, instruction, ma);
if (ret==0) {
regs->pr = regs->pc + 4;
regs->pc = rm;
case 0x0B00: /* bf lab - no delayslot*/
break;
case 0x0F00: /* bf/s lab */
- ret = handle_unaligned_delayslot(regs, instruction);
+ ret = handle_delayslot(regs, instruction, ma);
if (ret==0) {
#if defined(CONFIG_CPU_SH4) || defined(CONFIG_SH7705_CACHE_32KB)
if ((regs->sr & 0x00000001) != 0)
case 0x0900: /* bt lab - no delayslot */
break;
case 0x0D00: /* bt/s lab */
- ret = handle_unaligned_delayslot(regs, instruction);
+ ret = handle_delayslot(regs, instruction, ma);
if (ret==0) {
#if defined(CONFIG_CPU_SH4) || defined(CONFIG_SH7705_CACHE_32KB)
if ((regs->sr & 0x00000001) == 0)
break;
case 0xA000: /* bra label */
- ret = handle_unaligned_delayslot(regs, instruction);
+ ret = handle_delayslot(regs, instruction, ma);
if (ret==0)
regs->pc += SH_PC_12BIT_OFFSET(instruction);
break;
case 0xB000: /* bsr label */
- ret = handle_unaligned_delayslot(regs, instruction);
+ ret = handle_delayslot(regs, instruction, ma);
if (ret==0) {
regs->pr = regs->pc + 4;
regs->pc += SH_PC_12BIT_OFFSET(instruction);
/* handle non-delay-slot instruction */
simple:
- ret = handle_unaligned_ins(instruction, regs);
+ ret = handle_unaligned_ins(instruction, regs, ma);
if (ret==0)
regs->pc += instruction_size(instruction);
return ret;
}
-#ifdef CONFIG_CPU_HAS_SR_RB
-#define lookup_exception_vector(x) \
- __asm__ __volatile__ ("stc r2_bank, %0\n\t" : "=r" ((x)))
-#else
-#define lookup_exception_vector(x) \
- __asm__ __volatile__ ("mov r4, %0\n\t" : "=r" ((x)))
-#endif
-
/*
* Handle various address error exceptions:
* - instruction address error:
unsigned long error_code = 0;
mm_segment_t oldfs;
siginfo_t info;
- opcode_t instruction;
+ insn_size_t instruction;
int tmp;
/* Intentional ifdef */
#ifdef CONFIG_CPU_HAS_SR_RB
- lookup_exception_vector(error_code);
+ error_code = lookup_exception_vector();
#endif
oldfs = get_fs();
local_irq_enable();
- /* bad PC is not something we can fix */
- if (regs->pc & 1) {
- si_code = BUS_ADRALN;
- goto uspace_segv;
- }
+ se_user += 1;
set_fs(USER_DS);
- if (copy_from_user(&instruction, (void *)(regs->pc),
+ if (copy_from_user(&instruction, (insn_size_t *)(regs->pc & ~1),
sizeof(instruction))) {
- /* Argh. Fault on the instruction itself.
- This should never happen non-SMP
- */
set_fs(oldfs);
goto uspace_segv;
}
+ set_fs(oldfs);
+
+ /* shout about userspace fixups */
+ if (se_usermode & 1)
+ printk(KERN_NOTICE "Unaligned userspace access "
+ "in \"%s\" pid=%d pc=0x%p ins=0x%04hx\n",
+ current->comm, current->pid, (void *)regs->pc,
+ instruction);
+
+ if (se_usermode & 2)
+ goto fixup;
+
+ if (se_usermode & 4)
+ goto uspace_segv;
+ else {
+ /* ignore */
+ regs->pc += instruction_size(instruction);
+ return;
+ }
+
+fixup:
+ /* bad PC is not something we can fix */
+ if (regs->pc & 1) {
+ si_code = BUS_ADRALN;
+ goto uspace_segv;
+ }
- tmp = handle_unaligned_access(instruction, regs);
+ set_fs(USER_DS);
+ tmp = handle_unaligned_access(instruction, regs,
+ &user_mem_access, 0);
set_fs(oldfs);
if (tmp==0)
info.si_addr = (void __user *)address;
force_sig_info(SIGBUS, &info, current);
} else {
+ se_sys += 1;
+
if (regs->pc & 1)
die("unaligned program counter", regs, error_code);
set_fs(KERNEL_DS);
- if (copy_from_user(&instruction, (void *)(regs->pc),
+ if (copy_from_user(&instruction, (void __user *)(regs->pc),
sizeof(instruction))) {
/* Argh. Fault on the instruction itself.
This should never happen non-SMP
die("insn faulting in do_address_error", regs, 0);
}
- handle_unaligned_access(instruction, regs);
+ if (se_kernmode_warn)
+ printk(KERN_NOTICE "Unaligned kernel access "
+ "on behalf of \"%s\" pid=%d pc=0x%p ins=0x%04hx\n",
+ current->comm, current->pid, (void *)regs->pc,
+ instruction);
+
+ handle_unaligned_access(instruction, regs,
+ &user_mem_access, 0);
set_fs(oldfs);
}
}
if (is_dsp_inst(regs)) {
/* Enable DSP mode, and restart instruction. */
regs->sr |= SR_DSP;
+ /* Save DSP mode */
+ tsk->thread.dsp_status.status |= SR_DSP;
return;
}
#endif
- lookup_exception_vector(error_code);
+ error_code = lookup_exception_vector();
local_irq_enable();
- CHK_REMOTE_DEBUG(regs);
force_sig(SIGILL, tsk);
die_if_no_fixup("reserved instruction", regs, error_code);
}
#ifdef CONFIG_SH_FPU_EMU
-static int emulate_branch(unsigned short inst, struct pt_regs* regs)
+static int emulate_branch(unsigned short inst, struct pt_regs *regs)
{
/*
* bfs: 8fxx: PC+=d*2+4;
* jsr: 4x0b: PC=Rn after PR=PC+4;
* rts: 000b: PC=PR;
*/
- if ((inst & 0xfd00) == 0x8d00) {
+ if (((inst & 0xf000) == 0xb000) || /* bsr */
+ ((inst & 0xf0ff) == 0x0003) || /* bsrf */
+ ((inst & 0xf0ff) == 0x400b)) /* jsr */
+ regs->pr = regs->pc + 4;
+
+ if ((inst & 0xfd00) == 0x8d00) { /* bfs, bts */
regs->pc += SH_PC_8BIT_OFFSET(inst);
return 0;
}
- if ((inst & 0xe000) == 0xa000) {
+ if ((inst & 0xe000) == 0xa000) { /* bra, bsr */
regs->pc += SH_PC_12BIT_OFFSET(inst);
return 0;
}
- if ((inst & 0xf0df) == 0x0003) {
+ if ((inst & 0xf0df) == 0x0003) { /* braf, bsrf */
regs->pc += regs->regs[(inst & 0x0f00) >> 8] + 4;
return 0;
}
- if ((inst & 0xf0df) == 0x400b) {
+ if ((inst & 0xf0df) == 0x400b) { /* jmp, jsr */
regs->pc = regs->regs[(inst & 0x0f00) >> 8];
return 0;
}
- if ((inst & 0xffff) == 0x000b) {
+ if ((inst & 0xffff) == 0x000b) { /* rts */
regs->pc = regs->pr;
return 0;
}
struct pt_regs __regs)
{
struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
- unsigned long error_code;
+ unsigned long inst;
struct task_struct *tsk = current;
-#ifdef CONFIG_SH_FPU_EMU
- unsigned short inst = 0;
+ if (kprobe_handle_illslot(regs->pc) == 0)
+ return;
+
+#ifdef CONFIG_SH_FPU_EMU
get_user(inst, (unsigned short *)regs->pc + 1);
if (!do_fpu_inst(inst, regs)) {
get_user(inst, (unsigned short *)regs->pc);
/* not a FPU inst. */
#endif
- lookup_exception_vector(error_code);
+ inst = lookup_exception_vector();
local_irq_enable();
- CHK_REMOTE_DEBUG(regs);
force_sig(SIGILL, tsk);
- die_if_no_fixup("illegal slot instruction", regs, error_code);
+ die_if_no_fixup("illegal slot instruction", regs, inst);
}
asmlinkage void do_exception_error(unsigned long r4, unsigned long r5,
struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
long ex;
- lookup_exception_vector(ex);
+ ex = lookup_exception_vector();
die_if_kernel("exception", regs, ex);
}
set_exception_table_evt(0x800, do_reserved_inst);
set_exception_table_evt(0x820, do_illegal_slot_inst);
#elif defined(CONFIG_SH_FPU)
-#ifdef CONFIG_CPU_SUBTYPE_SHX3
- set_exception_table_evt(0xd80, fpu_state_restore_trap_handler);
- set_exception_table_evt(0xda0, fpu_state_restore_trap_handler);
-#else
set_exception_table_evt(0x800, fpu_state_restore_trap_handler);
set_exception_table_evt(0x820, fpu_state_restore_trap_handler);
#endif
-#endif
#ifdef CONFIG_CPU_SH2
set_exception_table_vec(TRAP_ADDRESS_ERROR, address_error_trap_handler);
#ifdef CONFIG_CPU_SH2A
set_exception_table_vec(TRAP_DIVZERO_ERROR, do_divide_error);
set_exception_table_vec(TRAP_DIVOVF_ERROR, do_divide_error);
+#ifdef CONFIG_SH_FPU
+ set_exception_table_vec(TRAP_FPU_ERROR, fpu_error_trap_handler);
#endif
-
- /* Setup VBR for boot cpu */
- per_cpu_trap_init();
-}
-
-void show_trace(struct task_struct *tsk, unsigned long *sp,
- struct pt_regs *regs)
-{
- unsigned long addr;
-
- if (regs && user_mode(regs))
- return;
-
- printk("\nCall trace: ");
-#ifdef CONFIG_KALLSYMS
- printk("\n");
#endif
- while (!kstack_end(sp)) {
- addr = *sp++;
- if (kernel_text_address(addr))
- print_ip_sym(addr);
- }
-
- printk("\n");
-
- if (!tsk)
- tsk = current;
+#ifdef TRAP_UBC
+ set_exception_table_vec(TRAP_UBC, break_point_trap);
+#endif
- debug_show_held_locks(tsk);
+ /* Setup VBR for boot cpu */
+ per_cpu_trap_init();
}
void show_stack(struct task_struct *tsk, unsigned long *sp)
show_stack(NULL, NULL);
}
EXPORT_SYMBOL(dump_stack);
+
+#ifdef CONFIG_PROC_FS
+/*
+ * This needs to be done after sysctl_init, otherwise sys/ will be
+ * overwritten. Actually, this shouldn't be in sys/ at all since
+ * it isn't a sysctl, and it doesn't contain sysctl information.
+ * We now locate it in /proc/cpu/alignment instead.
+ */
+static int __init alignment_init(void)
+{
+ struct proc_dir_entry *dir, *res;
+
+ dir = proc_mkdir("cpu", NULL);
+ if (!dir)
+ return -ENOMEM;
+
+ res = proc_create_data("alignment", S_IWUSR | S_IRUGO, dir,
+ &alignment_proc_fops, &se_usermode);
+ if (!res)
+ return -ENOMEM;
+
+ res = proc_create_data("kernel_alignment", S_IWUSR | S_IRUGO, dir,
+ &alignment_proc_fops, &se_kernmode_warn);
+ if (!res)
+ return -ENOMEM;
+
+ return 0;
+}
+
+fs_initcall(alignment_init);
+#endif
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff