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Diffstat (limited to 'arch/m68k/kernel/traps.c')
-rw-r--r--arch/m68k/kernel/traps.c150
1 files changed, 68 insertions, 82 deletions
diff --git a/arch/m68k/kernel/traps.c b/arch/m68k/kernel/traps.c
index c1cc4e99aa94..d2f25e8895e5 100644
--- a/arch/m68k/kernel/traps.c
+++ b/arch/m68k/kernel/traps.c
@@ -30,15 +30,19 @@
#include <linux/init.h>
#include <linux/ptrace.h>
#include <linux/kallsyms.h>
+#include <linux/extable.h>
#include <asm/setup.h>
#include <asm/fpu.h>
#include <linux/uaccess.h>
#include <asm/traps.h>
-#include <asm/pgalloc.h>
#include <asm/machdep.h>
+#include <asm/processor.h>
#include <asm/siginfo.h>
+#include <asm/tlbflush.h>
+#include "traps.h"
+#include "../mm/fault.h"
static const char *vec_names[] = {
[VEC_RESETSP] = "RESET SP",
@@ -123,10 +127,6 @@ static const char *space_names[] = {
};
void die_if_kernel(char *,struct pt_regs *,int);
-asmlinkage int do_page_fault(struct pt_regs *regs, unsigned long address,
- unsigned long error_code);
-int send_fault_sig(struct pt_regs *regs);
-
asmlinkage void trap_c(struct frame *fp);
#if defined (CONFIG_M68060)
@@ -182,9 +182,8 @@ static inline void access_error060 (struct frame *fp)
static inline unsigned long probe040(int iswrite, unsigned long addr, int wbs)
{
unsigned long mmusr;
- mm_segment_t old_fs = get_fs();
- set_fs(MAKE_MM_SEG(wbs));
+ set_fc(wbs);
if (iswrite)
asm volatile (".chip 68040; ptestw (%0); .chip 68k" : : "a" (addr));
@@ -193,7 +192,7 @@ static inline unsigned long probe040(int iswrite, unsigned long addr, int wbs)
asm volatile (".chip 68040; movec %%mmusr,%0; .chip 68k" : "=r" (mmusr));
- set_fs(old_fs);
+ set_fc(USER_DATA);
return mmusr;
}
@@ -202,10 +201,8 @@ static inline int do_040writeback1(unsigned short wbs, unsigned long wba,
unsigned long wbd)
{
int res = 0;
- mm_segment_t old_fs = get_fs();
- /* set_fs can not be moved, otherwise put_user() may oops */
- set_fs(MAKE_MM_SEG(wbs));
+ set_fc(wbs);
switch (wbs & WBSIZ_040) {
case BA_SIZE_BYTE:
@@ -219,9 +216,7 @@ static inline int do_040writeback1(unsigned short wbs, unsigned long wba,
break;
}
- /* set_fs can not be moved, otherwise put_user() may oops */
- set_fs(old_fs);
-
+ set_fc(USER_DATA);
pr_debug("do_040writeback1, res=%d\n", res);
@@ -369,7 +364,7 @@ disable_wb:
#if defined(CONFIG_SUN3)
#include <asm/sun3mmu.h>
-extern int mmu_emu_handle_fault (unsigned long, int, int);
+#include "../sun3/sun3.h"
/* sun3 version of bus_error030 */
@@ -388,7 +383,7 @@ static inline void bus_error030 (struct frame *fp)
fp->ptregs.format == 0xa ? fp->ptregs.pc + 4 : fp->un.fmtb.baddr);
if (ssw & DF)
pr_debug("Data %s fault at %#010lx in %s (pc=%#lx)\n",
- ssw & RW ? "read" : "write",
+ str_read_write(ssw & RW),
fp->un.fmtb.daddr,
space_names[ssw & DFC], fp->ptregs.pc);
@@ -424,14 +419,14 @@ static inline void bus_error030 (struct frame *fp)
}
pr_err("Data %s fault at %#010lx in %s (pc=%#lx)\n",
- ssw & RW ? "read" : "write",
+ str_read_write(ssw & RW),
fp->un.fmtb.daddr,
space_names[ssw & DFC], fp->ptregs.pc);
}
pr_err("BAD KERNEL BUSERR\n");
die_if_kernel("Oops", &fp->ptregs,0);
- force_sig(SIGKILL, current);
+ force_sig(SIGKILL);
return;
}
} else {
@@ -460,10 +455,10 @@ static inline void bus_error030 (struct frame *fp)
pr_debug("*** unexpected busfault type=%#04x\n",
buserr_type);
pr_debug("invalid %s access at %#lx from pc %#lx\n",
- !(ssw & RW) ? "write" : "read", addr,
+ str_read_write(ssw & RW), addr,
fp->ptregs.pc);
die_if_kernel ("Oops", &fp->ptregs, buserr_type);
- force_sig (SIGBUS, current);
+ force_sig (SIGBUS);
return;
}
@@ -491,10 +486,10 @@ static inline void bus_error030 (struct frame *fp)
if (buserr_type & SUN3_BUSERR_INVALID) {
if (!mmu_emu_handle_fault(addr, 1, 0))
do_page_fault (&fp->ptregs, addr, 0);
- } else {
+ } else {
pr_debug("protection fault on insn access (segv).\n");
- force_sig (SIGSEGV, current);
- }
+ force_sig (SIGSEGV);
+ }
}
#else
#if defined(CPU_M68020_OR_M68030)
@@ -519,7 +514,7 @@ static inline void bus_error030 (struct frame *fp)
fp->ptregs.format == 0xa ? fp->ptregs.pc + 4 : fp->un.fmtb.baddr);
if (ssw & DF)
pr_debug("Data %s fault at %#010lx in %s (pc=%#lx)\n",
- ssw & RW ? "read" : "write",
+ str_read_write(ssw & RW),
fp->un.fmtb.daddr,
space_names[ssw & DFC], fp->ptregs.pc);
@@ -550,9 +545,10 @@ static inline void bus_error030 (struct frame *fp)
errorcode |= 2;
if (mmusr & (MMU_I | MMU_WP)) {
- if (ssw & 4) {
+ /* We might have an exception table for this PC */
+ if (ssw & 4 && !search_exception_tables(fp->ptregs.pc)) {
pr_err("Data %s fault at %#010lx in %s (pc=%#lx)\n",
- ssw & RW ? "read" : "write",
+ str_read_write(ssw & RW),
fp->un.fmtb.daddr,
space_names[ssw & DFC], fp->ptregs.pc);
goto buserr;
@@ -568,10 +564,10 @@ static inline void bus_error030 (struct frame *fp)
mmusr);
} else if (mmusr & (MMU_B|MMU_L|MMU_S)) {
pr_err("invalid %s access at %#lx from pc %#lx\n",
- !(ssw & RW) ? "write" : "read", addr,
+ str_read_write(ssw & RW), addr,
fp->ptregs.pc);
die_if_kernel("Oops",&fp->ptregs,mmusr);
- force_sig(SIGSEGV, current);
+ force_sig(SIGSEGV);
return;
} else {
#if 0
@@ -579,7 +575,7 @@ static inline void bus_error030 (struct frame *fp)
#endif
pr_err("weird %s access at %#lx from pc %#lx (ssw is %#x)\n",
- !(ssw & RW) ? "write" : "read", addr,
+ str_read_write(ssw & RW), addr,
fp->ptregs.pc, ssw);
asm volatile ("ptestr #1,%1@,#0\n\t"
"pmove %%psr,%0"
@@ -598,7 +594,7 @@ static inline void bus_error030 (struct frame *fp)
#endif
pr_debug("Unknown SIGSEGV - 1\n");
die_if_kernel("Oops",&fp->ptregs,mmusr);
- force_sig(SIGSEGV, current);
+ force_sig(SIGSEGV);
return;
}
@@ -621,7 +617,7 @@ static inline void bus_error030 (struct frame *fp)
buserr:
pr_err("BAD KERNEL BUSERR\n");
die_if_kernel("Oops",&fp->ptregs,0);
- force_sig(SIGKILL, current);
+ force_sig(SIGKILL);
return;
}
@@ -660,7 +656,7 @@ static inline void bus_error030 (struct frame *fp)
addr, fp->ptregs.pc);
pr_debug("Unknown SIGSEGV - 2\n");
die_if_kernel("Oops",&fp->ptregs,mmusr);
- force_sig(SIGSEGV, current);
+ force_sig(SIGSEGV);
return;
}
@@ -804,20 +800,20 @@ asmlinkage void buserr_c(struct frame *fp)
default:
die_if_kernel("bad frame format",&fp->ptregs,0);
pr_debug("Unknown SIGSEGV - 4\n");
- force_sig(SIGSEGV, current);
+ force_sig(SIGSEGV);
}
}
static int kstack_depth_to_print = 48;
-void show_trace(unsigned long *stack)
+static void show_trace(unsigned long *stack, const char *loglvl)
{
unsigned long *endstack;
unsigned long addr;
int i;
- pr_info("Call Trace:");
+ printk("%sCall Trace:", loglvl);
addr = (unsigned long)stack + THREAD_SIZE - 1;
endstack = (unsigned long *)(addr & -THREAD_SIZE);
i = 0;
@@ -846,7 +842,6 @@ void show_trace(unsigned long *stack)
void show_registers(struct pt_regs *regs)
{
struct frame *fp = (struct frame *)regs;
- mm_segment_t old_fs = get_fs();
u16 c, *cp;
unsigned long addr;
int i;
@@ -855,9 +850,9 @@ void show_registers(struct pt_regs *regs)
pr_info("PC: [<%08lx>] %pS\n", regs->pc, (void *)regs->pc);
pr_info("SR: %04x SP: %p a2: %08lx\n", regs->sr, regs, regs->a2);
pr_info("d0: %08lx d1: %08lx d2: %08lx d3: %08lx\n",
- regs->d0, regs->d1, regs->d2, regs->d3);
+ regs->d0, regs->d1, regs->d2, regs->d3);
pr_info("d4: %08lx d5: %08lx a0: %08lx a1: %08lx\n",
- regs->d4, regs->d5, regs->a0, regs->a1);
+ regs->d4, regs->d5, regs->a0, regs->a1);
pr_info("Process %s (pid: %d, task=%p)\n",
current->comm, task_pid_nr(current), current);
@@ -916,13 +911,12 @@ void show_registers(struct pt_regs *regs)
default:
pr_cont("\n");
}
- show_stack(NULL, (unsigned long *)addr);
+ show_stack(NULL, (unsigned long *)addr, KERN_INFO);
pr_info("Code:");
- set_fs(KERNEL_DS);
cp = (u16 *)regs->pc;
for (i = -8; i < 16; i++) {
- if (get_user(c, cp + i) && i >= 0) {
+ if (get_kernel_nofault(c, cp + i) && i >= 0) {
pr_cont(" Bad PC value.");
break;
}
@@ -931,11 +925,11 @@ void show_registers(struct pt_regs *regs)
else
pr_cont(" <%04x>", c);
}
- set_fs(old_fs);
pr_cont("\n");
}
-void show_stack(struct task_struct *task, unsigned long *stack)
+void show_stack(struct task_struct *task, unsigned long *stack,
+ const char *loglvl)
{
unsigned long *p;
unsigned long *endstack;
@@ -949,7 +943,7 @@ void show_stack(struct task_struct *task, unsigned long *stack)
}
endstack = (unsigned long *)(((unsigned long)stack + THREAD_SIZE - 1) & -THREAD_SIZE);
- pr_info("Stack from %08lx:", (unsigned long)stack);
+ printk("%sStack from %08lx:", loglvl, (unsigned long)stack);
p = stack;
for (i = 0; i < kstack_depth_to_print; i++) {
if (p + 1 > endstack)
@@ -959,7 +953,7 @@ void show_stack(struct task_struct *task, unsigned long *stack)
pr_cont(" %08lx", *p++);
}
pr_cont("\n");
- show_trace(stack);
+ show_trace(stack, loglvl);
}
/*
@@ -970,7 +964,7 @@ void show_stack(struct task_struct *task, unsigned long *stack)
* real 68k parts, but it won't hurt either.
*/
-void bad_super_trap (struct frame *fp)
+static void bad_super_trap(struct frame *fp)
{
int vector = (fp->ptregs.vector >> 2) & 0xff;
@@ -997,7 +991,7 @@ void bad_super_trap (struct frame *fp)
fp->ptregs.pc + 4 : fp->un.fmtb.baddr);
if (ssw & DF)
pr_err("Data %s fault at %#010lx in %s (pc=%#lx)\n",
- ssw & RW ? "read" : "write",
+ str_read_write(ssw & RW),
fp->un.fmtb.daddr, space_names[ssw & DFC],
fp->ptregs.pc);
}
@@ -1007,9 +1001,9 @@ void bad_super_trap (struct frame *fp)
asmlinkage void trap_c(struct frame *fp)
{
- int sig;
+ int sig, si_code;
+ void __user *addr;
int vector = (fp->ptregs.vector >> 2) & 0xff;
- siginfo_t info;
if (fp->ptregs.sr & PS_S) {
if (vector == VEC_TRACE) {
@@ -1029,21 +1023,21 @@ asmlinkage void trap_c(struct frame *fp)
/* send the appropriate signal to the user program */
switch (vector) {
case VEC_ADDRERR:
- info.si_code = BUS_ADRALN;
+ si_code = BUS_ADRALN;
sig = SIGBUS;
break;
case VEC_ILLEGAL:
case VEC_LINE10:
case VEC_LINE11:
- info.si_code = ILL_ILLOPC;
+ si_code = ILL_ILLOPC;
sig = SIGILL;
break;
case VEC_PRIV:
- info.si_code = ILL_PRVOPC;
+ si_code = ILL_PRVOPC;
sig = SIGILL;
break;
case VEC_COPROC:
- info.si_code = ILL_COPROC;
+ si_code = ILL_COPROC;
sig = SIGILL;
break;
case VEC_TRAP1:
@@ -1060,76 +1054,74 @@ asmlinkage void trap_c(struct frame *fp)
case VEC_TRAP12:
case VEC_TRAP13:
case VEC_TRAP14:
- info.si_code = ILL_ILLTRP;
+ si_code = ILL_ILLTRP;
sig = SIGILL;
break;
case VEC_FPBRUC:
case VEC_FPOE:
case VEC_FPNAN:
- info.si_code = FPE_FLTINV;
+ si_code = FPE_FLTINV;
sig = SIGFPE;
break;
case VEC_FPIR:
- info.si_code = FPE_FLTRES;
+ si_code = FPE_FLTRES;
sig = SIGFPE;
break;
case VEC_FPDIVZ:
- info.si_code = FPE_FLTDIV;
+ si_code = FPE_FLTDIV;
sig = SIGFPE;
break;
case VEC_FPUNDER:
- info.si_code = FPE_FLTUND;
+ si_code = FPE_FLTUND;
sig = SIGFPE;
break;
case VEC_FPOVER:
- info.si_code = FPE_FLTOVF;
+ si_code = FPE_FLTOVF;
sig = SIGFPE;
break;
case VEC_ZERODIV:
- info.si_code = FPE_INTDIV;
+ si_code = FPE_INTDIV;
sig = SIGFPE;
break;
case VEC_CHK:
case VEC_TRAP:
- info.si_code = FPE_INTOVF;
+ si_code = FPE_INTOVF;
sig = SIGFPE;
break;
case VEC_TRACE: /* ptrace single step */
- info.si_code = TRAP_TRACE;
+ si_code = TRAP_TRACE;
sig = SIGTRAP;
break;
case VEC_TRAP15: /* breakpoint */
- info.si_code = TRAP_BRKPT;
+ si_code = TRAP_BRKPT;
sig = SIGTRAP;
break;
default:
- info.si_code = ILL_ILLOPC;
+ si_code = ILL_ILLOPC;
sig = SIGILL;
break;
}
- info.si_signo = sig;
- info.si_errno = 0;
switch (fp->ptregs.format) {
default:
- info.si_addr = (void *) fp->ptregs.pc;
+ addr = (void __user *) fp->ptregs.pc;
break;
case 2:
- info.si_addr = (void *) fp->un.fmt2.iaddr;
+ addr = (void __user *) fp->un.fmt2.iaddr;
break;
case 7:
- info.si_addr = (void *) fp->un.fmt7.effaddr;
+ addr = (void __user *) fp->un.fmt7.effaddr;
break;
case 9:
- info.si_addr = (void *) fp->un.fmt9.iaddr;
+ addr = (void __user *) fp->un.fmt9.iaddr;
break;
case 10:
- info.si_addr = (void *) fp->un.fmta.daddr;
+ addr = (void __user *) fp->un.fmta.daddr;
break;
case 11:
- info.si_addr = (void *) fp->un.fmtb.daddr;
+ addr = (void __user*) fp->un.fmtb.daddr;
break;
}
- force_sig_info (sig, &info, current);
+ force_sig_fault(sig, si_code, addr);
}
void die_if_kernel (char *str, struct pt_regs *fp, int nr)
@@ -1141,7 +1133,7 @@ void die_if_kernel (char *str, struct pt_regs *fp, int nr)
pr_crit("%s: %08x\n", str, nr);
show_registers(fp);
add_taint(TAINT_DIE, LOCKDEP_NOW_UNRELIABLE);
- do_exit(SIGSEGV);
+ make_task_dead(SIGSEGV);
}
asmlinkage void set_esp0(unsigned long ssp)
@@ -1155,18 +1147,12 @@ asmlinkage void set_esp0(unsigned long ssp)
*/
asmlinkage void fpsp040_die(void)
{
- do_exit(SIGSEGV);
+ force_exit_sig(SIGSEGV);
}
#ifdef CONFIG_M68KFPU_EMU
asmlinkage void fpemu_signal(int signal, int code, void *addr)
{
- siginfo_t info;
-
- info.si_signo = signal;
- info.si_errno = 0;
- info.si_code = code;
- info.si_addr = addr;
- force_sig_info(signal, &info, current);
+ force_sig_fault(signal, code, addr);
}
#endif
generated by cgit (git 2.34.1) at 2025-12-25 05:40:19 +0000