#include <asm/ptrace.h>
#include <asm/processor.h>
-#include <asm/extable_64.h>
#include <asm/spitfire.h>
#include <asm/adi.h>
/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __ASM_EXTABLE64_H
-#define __ASM_EXTABLE64_H
+#ifndef __ASM_EXTABLE_H
+#define __ASM_EXTABLE_H
/*
* The exception table consists of pairs of addresses: the first is the
* address of an instruction that is allowed to fault, and the second is
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef ___ASM_SPARC_UACCESS_H
#define ___ASM_SPARC_UACCESS_H
+
+#include <asm/extable.h>
+
#if defined(__sparc__) && defined(__arch64__)
#include <asm/uaccess_64.h>
#else
#include <asm/processor.h>
-#define ARCH_HAS_SORT_EXTABLE
-#define ARCH_HAS_SEARCH_EXTABLE
-
/* Sparc is not segmented, however we need to be able to fool access_ok()
* when doing system calls from kernel mode legitimately.
*
#define __access_ok(addr, size) (__user_ok((addr) & get_fs().seg, (size)))
#define access_ok(addr, size) __access_ok((unsigned long)(addr), size)
-/*
- * The exception table consists of pairs of addresses: the first is the
- * address of an instruction that is allowed to fault, and the second is
- * the address at which the program should continue. No registers are
- * modified, so it is entirely up to the continuation code to figure out
- * what to do.
- *
- * All the routines below use bits of fixup code that are out of line
- * with the main instruction path. This means when everything is well,
- * we don't even have to jump over them. Further, they do not intrude
- * on our cache or tlb entries.
- *
- * There is a special way how to put a range of potentially faulting
- * insns (like twenty ldd/std's with now intervening other instructions)
- * You specify address of first in insn and 0 in fixup and in the next
- * exception_table_entry you specify last potentially faulting insn + 1
- * and in fixup the routine which should handle the fault.
- * That fixup code will get
- * (faulting_insn_address - first_insn_in_the_range_address)/4
- * in %g2 (ie. index of the faulting instruction in the range).
- */
-
-struct exception_table_entry
-{
- unsigned long insn, fixup;
-};
-
-/* Returns 0 if exception not found and fixup otherwise. */
-unsigned long search_extables_range(unsigned long addr, unsigned long *g2);
-
/* Uh, these should become the main single-value transfer routines..
* They automatically use the right size if we just have the right
* pointer type..
#include <linux/string.h>
#include <asm/asi.h>
#include <asm/spitfire.h>
-#include <asm/extable_64.h>
#include <asm/processor.h>
#include <linux/uaccess.h>
#include <linux/smp.h>
#include <linux/perf_event.h>
+#include <linux/extable.h>
#include <asm/setup.h>
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");
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)
obj-$(CONFIG_SPARC64) += ultra.o tlb.o tsb.o
obj-y += fault_$(BITS).o
obj-y += init_$(BITS).o
-obj-$(CONFIG_SPARC32) += extable.o srmmu.o iommu.o io-unit.o
+obj-$(CONFIG_SPARC32) += srmmu.o iommu.o io-unit.o
obj-$(CONFIG_SPARC32) += srmmu_access.o
obj-$(CONFIG_SPARC32) += hypersparc.o viking.o tsunami.o swift.o
obj-$(CONFIG_SPARC32) += leon_mm.o
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * linux/arch/sparc/mm/extable.c
- */
-
-#include <linux/module.h>
-#include <linux/extable.h>
-#include <linux/uaccess.h>
-
-void sort_extable(struct exception_table_entry *start,
- struct exception_table_entry *finish)
-{
-}
-
-/* Caller knows they are in a range if ret->fixup == 0 */
-const struct exception_table_entry *
-search_extable(const struct exception_table_entry *base,
- const size_t num,
- unsigned long value)
-{
- int i;
-
- /* Single insn entries are encoded as:
- * word 1: insn address
- * word 2: fixup code address
- *
- * Range entries are encoded as:
- * word 1: first insn address
- * word 2: 0
- * word 3: last insn address + 4 bytes
- * word 4: fixup code address
- *
- * Deleted entries are encoded as:
- * word 1: unused
- * word 2: -1
- *
- * See asm/uaccess.h for more details.
- */
-
- /* 1. Try to find an exact match. */
- for (i = 0; i < num; i++) {
- if (base[i].fixup == 0) {
- /* A range entry, skip both parts. */
- i++;
- continue;
- }
-
- /* A deleted entry; see trim_init_extable */
- if (base[i].fixup == -1)
- continue;
-
- if (base[i].insn == value)
- return &base[i];
- }
-
- /* 2. Try to find a range match. */
- for (i = 0; i < (num - 1); i++) {
- if (base[i].fixup)
- continue;
-
- if (base[i].insn <= value && base[i + 1].insn > value)
- return &base[i];
-
- i++;
- }
-
- return NULL;
-}
-
-#ifdef CONFIG_MODULES
-/* We could memmove them around; easier to mark the trimmed ones. */
-void trim_init_extable(struct module *m)
-{
- unsigned int i;
- bool range;
-
- for (i = 0; i < m->num_exentries; i += range ? 2 : 1) {
- range = m->extable[i].fixup == 0;
-
- if (within_module_init(m->extable[i].insn, m)) {
- m->extable[i].fixup = -1;
- if (range)
- m->extable[i+1].fixup = -1;
- }
- if (range)
- i++;
- }
-}
-#endif /* CONFIG_MODULES */
-
-/* Special extable search, which handles ranges. Returns fixup */
-unsigned long search_extables_range(unsigned long addr, unsigned long *g2)
-{
- const struct exception_table_entry *entry;
-
- entry = search_exception_tables(addr);
- if (!entry)
- return 0;
-
- /* Inside range? Fix g2 and return correct fixup */
- if (!entry->fixup) {
- *g2 = (addr - entry->insn) / 4;
- return (entry + 1)->fixup;
- }
-
- return entry->fixup;
-}
#include <linux/interrupt.h>
#include <linux/kdebug.h>
#include <linux/uaccess.h>
+#include <linux/extable.h>
#include <asm/page.h>
#include <asm/openprom.h>
struct vm_area_struct *vma;
struct task_struct *tsk = current;
struct mm_struct *mm = tsk->mm;
- unsigned int fixup;
- unsigned long g2;
int from_user = !(regs->psr & PSR_PS);
int code;
vm_fault_t fault;
/* Is this in ex_table? */
no_context:
- g2 = regs->u_regs[UREG_G2];
if (!from_user) {
- fixup = search_extables_range(regs->pc, &g2);
- /* Values below 10 are reserved for other things */
- if (fixup > 10) {
+ const struct exception_table_entry *entry;
+
+ entry = search_exception_tables(regs->pc);
#ifdef DEBUG_EXCEPTIONS
- printk("Exception: PC<%08lx> faddr<%08lx>\n",
- regs->pc, address);
- printk("EX_TABLE: insn<%08lx> fixup<%08x> g2<%08lx>\n",
- regs->pc, fixup, g2);
+ printk("Exception: PC<%08lx> faddr<%08lx>\n",
+ regs->pc, address);
+ printk("EX_TABLE: insn<%08lx> fixup<%08x>\n",
+ regs->pc, entry->fixup);
#endif
- regs->u_regs[UREG_G2] = g2;
- regs->pc = fixup;
- regs->npc = regs->pc + 4;
- return;
- }
+ regs->pc = entry->fixup;
+ regs->npc = regs->pc + 4;
+ return;
}
unhandled_fault(address, tsk, regs);
}
#endif
-#ifndef ARCH_HAS_SORT_EXTABLE
#ifndef ARCH_HAS_RELATIVE_EXTABLE
#define swap_ex NULL
#else
m->num_exentries--;
}
#endif /* CONFIG_MODULES */
-#endif /* !ARCH_HAS_SORT_EXTABLE */
-
-#ifndef ARCH_HAS_SEARCH_EXTABLE
static int cmp_ex_search(const void *key, const void *elt)
{
return bsearch(&value, base, num,
sizeof(struct exception_table_entry), cmp_ex_search);
}
-#endif
projects / platform / kernel / linux-starfive.git / commitdiff