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Diffstat (limited to 'arch/m68k/kernel/traps.c')
-rw-r--r--arch/m68k/kernel/traps.c57
1 files changed, 27 insertions, 30 deletions
diff --git a/arch/m68k/kernel/traps.c b/arch/m68k/kernel/traps.c
index 9e1261462bcc..d2f25e8895e5 100644
--- a/arch/m68k/kernel/traps.c
+++ b/arch/m68k/kernel/traps.c
@@ -30,15 +30,20 @@
#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/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",
[VEC_RESETPC] = "RESET PC",
@@ -122,10 +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)
@@ -181,9 +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));
@@ -192,7 +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;
}
@@ -201,10 +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:
@@ -218,9 +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);
@@ -368,7 +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 */
@@ -387,7 +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);
@@ -423,7 +419,7 @@ 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);
}
@@ -459,7 +455,7 @@ 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);
@@ -490,10 +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);
- }
+ }
}
#else
#if defined(CPU_M68020_OR_M68030)
@@ -518,7 +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);
@@ -549,9 +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;
@@ -567,7 +564,7 @@ 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);
@@ -578,7 +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"
@@ -853,9 +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);
@@ -967,7 +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;
@@ -994,7 +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);
}
@@ -1136,7 +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)
@@ -1150,7 +1147,7 @@ asmlinkage void set_esp0(unsigned long ssp)
*/
asmlinkage void fpsp040_die(void)
{
- do_exit(SIGSEGV);
+ force_exit_sig(SIGSEGV);
}
#ifdef CONFIG_M68KFPU_EMU
generated by cgit (git 2.34.1) at 2025-12-24 20:56:17 +0000