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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __PARISC_EXTABLE_H
#define __PARISC_EXTABLE_H

#include <asm/ptrace.h>
#include <linux/compiler.h>

/*
 * The exception table consists of three addresses:
 *
 * - A relative address to the instruction that is allowed to fault.
 * - A relative address at which the program should continue (fixup routine)
 * - An asm statement which specifies which CPU register will
 *   receive -EFAULT when an exception happens if the lowest bit in
 *   the fixup address is set.
 *
 * Note: The register specified in the err_opcode instruction will be
 * modified at runtime if a fault happens. Register %r0 will be ignored.
 *
 * Since relative addresses are used, 32bit values are sufficient even on
 * 64bit kernel.
 */

struct pt_regs;
int fixup_exception(struct pt_regs *regs);

#define ARCH_HAS_RELATIVE_EXTABLE
struct exception_table_entry {
	int insn;	/* relative address of insn that is allowed to fault. */
	int fixup;	/* relative address of fixup routine */
	int err_opcode; /* sample opcode with register which holds error code */
};

#define ASM_EXCEPTIONTABLE_ENTRY( fault_addr, except_addr, opcode )\
	".section __ex_table,\"aw\"\n"			   \
	".align 4\n"					   \
	".word (" #fault_addr " - .), (" #except_addr " - .)\n" \
	opcode "\n"					   \
	".previous\n"

/*
 * ASM_EXCEPTIONTABLE_ENTRY_EFAULT() creates a special exception table entry
 * (with lowest bit set) for which the fault handler in fixup_exception() will
 * load -EFAULT on fault into the register specified by the err_opcode instruction,
 * and zeroes the target register in case of a read fault in get_user().
 */
#define ASM_EXCEPTIONTABLE_VAR(__err_var)		\
	int __err_var = 0
#define ASM_EXCEPTIONTABLE_ENTRY_EFAULT( fault_addr, except_addr, register )\
	ASM_EXCEPTIONTABLE_ENTRY( fault_addr, except_addr + 1, "or %%r0,%%r0," register)

static inline void swap_ex_entry_fixup(struct exception_table_entry *a,
				       struct exception_table_entry *b,
				       struct exception_table_entry tmp,
				       int delta)
{
	a->fixup = b->fixup + delta;
	b->fixup = tmp.fixup - delta;
	a->err_opcode = b->err_opcode;
	b->err_opcode = tmp.err_opcode;
}
#define swap_ex_entry_fixup swap_ex_entry_fixup

#endif

Batal

⬅ include 98 item

Nama	Tipe	Ukuran	Diubah	Perm	Aksi
📄 Kbuild	file	194 B	10/03/24 20:38	0644	✏️ ⬇
📄 alternative.h	h	2 KB	10/03/24 20:38	0644	✏️ ⬇
📄 asm-offsets.h	h	35 B	10/03/24 20:38	0644	✏️ ⬇
📄 asmregs.h	h	2.4 KB	10/03/24 20:38	0644	✏️ ⬇
📄 assembly.h	h	14 KB	26/05/26 09:55	0644	✏️ ⬇
📄 atomic.h	h	6 KB	10/03/24 20:38	0644	✏️ ⬇
📄 barrier.h	h	2.5 KB	10/03/24 20:38	0644	✏️ ⬇
📄 bitops.h	h	5.3 KB	10/03/24 20:38	0644	✏️ ⬇
📄 bug.h	h	2.6 KB	10/03/24 20:38	0644	✏️ ⬇
📄 cache.h	h	2.3 KB	26/05/26 09:55	0644	✏️ ⬇
📄 cacheflush.h	h	3.1 KB	26/05/26 09:55	0644	✏️ ⬇
📄 checksum.h	h	4.6 KB	26/05/26 09:55	0644	✏️ ⬇
📄 cmpxchg.h	h	3.7 KB	10/03/24 20:38	0644	✏️ ⬇
📄 compat.h	h	3.3 KB	10/03/24 20:38	0644	✏️ ⬇
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📄 elf.h	h	14.1 KB	10/03/24 20:38	0644	✏️ ⬇
📄 extable.h	h	2.2 KB	10/03/24 20:38	0644	✏️ ⬇
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📄 hash.h	h	5.1 KB	10/03/24 20:38	0644	✏️ ⬇
📄 hugetlb.h	h	1.4 KB	26/05/26 09:55	0644	✏️ ⬇
📄 io.h	h	6.6 KB	10/03/24 20:38	0644	✏️ ⬇
📄 irq.h	h	1.1 KB	10/03/24 20:38	0644	✏️ ⬇
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📄 mman.h	h	808 B	26/05/26 09:55	0644	✏️ ⬇
📄 mmu.h	h	199 B	10/03/24 20:38	0644	✏️ ⬇
📄 mmu_context.h	h	2.4 KB	10/03/24 20:38	0644	✏️ ⬇
📄 mmzone.h	h	202 B	10/03/24 20:38	0644	✏️ ⬇
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📄 page.h	h	5.2 KB	26/05/26 09:55	0644	✏️ ⬇
📄 parisc-device.h	h	1.9 KB	10/03/24 20:38	0644	✏️ ⬇
📄 parport.h	h	358 B	10/03/24 20:38	0644	✏️ ⬇
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📄 pci.h	h	5.7 KB	10/03/24 20:38	0644	✏️ ⬇
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📄 pdc_chassis.h	h	14.4 KB	10/03/24 20:38	0644	✏️ ⬇
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📄 pgalloc.h	h	1.7 KB	10/03/24 20:38	0644	✏️ ⬇
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📄 prefetch.h	h	1.1 KB	10/03/24 20:38	0644	✏️ ⬇
📄 processor.h	h	10.6 KB	10/03/24 20:38	0644	✏️ ⬇
📄 psw.h	h	2.4 KB	10/03/24 20:38	0644	✏️ ⬇
📄 ptrace.h	h	1.6 KB	10/03/24 20:38	0644	✏️ ⬇
📄 ropes.h	h	9.9 KB	10/03/24 20:38	0644	✏️ ⬇
📄 rt_sigframe.h	h	410 B	10/03/24 20:38	0644	✏️ ⬇
📄 runway.h	h	183 B	10/03/24 20:38	0644	✏️ ⬇
📄 seccomp.h	h	651 B	10/03/24 20:38	0644	✏️ ⬇
📄 sections.h	h	332 B	10/03/24 20:38	0644	✏️ ⬇
📄 serial.h	h	124 B	10/03/24 20:38	0644	✏️ ⬇
📄 shmparam.h	h	968 B	10/03/24 20:38	0644	✏️ ⬇
📄 signal.h	h	348 B	26/05/26 09:55	0644	✏️ ⬇
📄 smp.h	h	1.2 KB	10/03/24 20:38	0644	✏️ ⬇
📄 socket.h	h	310 B	10/03/24 20:38	0644	✏️ ⬇
📄 sparsemem.h	h	345 B	10/03/24 20:38	0644	✏️ ⬇
📄 special_insns.h	h	2.4 KB	26/05/26 09:55	0644	✏️ ⬇
📄 spinlock.h	h	3.4 KB	10/03/24 20:38	0644	✏️ ⬇
📄 spinlock_types.h	h	974 B	10/03/24 20:38	0644	✏️ ⬇
📄 string.h	h	247 B	10/03/24 20:38	0644	✏️ ⬇
📄 superio.h	h	3.3 KB	10/03/24 20:38	0644	✏️ ⬇
📄 switch_to.h	h	332 B	10/03/24 20:38	0644	✏️ ⬇
📄 syscall.h	h	1.4 KB	10/03/24 20:38	0644	✏️ ⬇
📄 thread_info.h	h	2.9 KB	10/03/24 20:38	0644	✏️ ⬇
📄 timex.h	h	403 B	10/03/24 20:38	0644	✏️ ⬇
📄 tlb.h	h	288 B	10/03/24 20:38	0644	✏️ ⬇
📄 tlbflush.h	h	1.9 KB	10/03/24 20:38	0644	✏️ ⬇
📄 topology.h	h	402 B	10/03/24 20:38	0644	✏️ ⬇
📄 traps.h	h	666 B	10/03/24 20:38	0644	✏️ ⬇
📄 uaccess.h	h	5.3 KB	26/05/26 09:55	0644	✏️ ⬇
📄 ucontext.h	h	327 B	10/03/24 20:38	0644	✏️ ⬇
📄 unaligned.h	h	282 B	10/03/24 20:38	0644	✏️ ⬇
📄 unistd.h	h	5.5 KB	10/03/24 20:38	0644	✏️ ⬇
📄 unwind.h	h	2.7 KB	10/03/24 20:38	0644	✏️ ⬇
📄 vdso.h	h	598 B	10/03/24 20:38	0644	✏️ ⬇
📄 vmalloc.h	h	96 B	10/03/24 20:38	0644	✏️ ⬇

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