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sparc32: switch to generic extables

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2020-07-16 14:05:36 -04:00
parent c4da8e0dc6
commit b4edf06c8a
10 changed files with 22 additions and 170 deletions
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10
arch/sparc/kernel/unaligned_32.c
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@@ -16,6 +16,7 @@
#include <linux/uaccess.h>
#include <linux/smp.h>
#include <linux/perf_event.h>
#include <linux/extable.h>
#include <asm/setup.h>
@@ -213,10 +214,10 @@ static inline int ok_for_kernel(unsigned int insn)
static void kernel_mna_trap_fault(struct pt_regs *regs, unsigned int insn)
{
unsigned long g2 = regs->u_regs [UREG_G2];
unsigned long fixup = search_extables_range(regs->pc, &g2);
const struct exception_table_entry *entry;
if (!fixup) {
entry = search_exception_tables(regs->pc);
if (!entry) {
unsigned long address = compute_effective_address(regs, insn);
if(address < PAGE_SIZE) {
printk(KERN_ALERT "Unable to handle kernel NULL pointer dereference in mna handler");
@@ -232,9 +233,8 @@ static void kernel_mna_trap_fault(struct pt_regs *regs, unsigned int insn)
die_if_kernel("Oops", regs);
/* Not reached */
}
regs->pc = fixup;
regs->pc = entry->fixup;
regs->npc = regs->pc + 4;
regs->u_regs [UREG_G2] = g2;
}
asmlinkage void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn)