path: root/arch/s390/kernel/dis.c

/*
 * arch/s390/kernel/dis.c
 *
 * Disassemble s390 instructions.
 *
 * Copyright IBM Corp. 2007
 * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
 */

#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/ptrace.h>
#include <linux/timer.h>
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/kallsyms.h>
#include <linux/reboot.h>
#include <linux/kprobes.h>

#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/atomic.h>
#include <asm/mathemu.h>
#include <asm/cpcmd.h>
#include <asm/s390_ext.h>
#include <asm/lowcore.h>
#include <asm/debug.h>
#include <asm/kdebug.h>

#ifndef CONFIG_64BIT
#define ONELONG "%08lx: "
#else /* CONFIG_64BIT */
#define ONELONG "%016lx: "
#endif /* CONFIG_64BIT */

#define OPERAND_GPR	0x1	/* Operand printed as %rx */
#define OPERAND_FPR	0x2	/* Operand printed as %fx */
#define OPERAND_AR	0x4	/* Operand printed as %ax */
#define OPERAND_CR	0x8	/* Operand printed as %cx */
#define OPERAND_DISP	0x10	/* Operand printed as displacement */
#define OPERAND_BASE	0x20	/* Operand printed as base register */
#define OPERAND_INDEX	0x40	/* Operand printed as index register */
#define OPERAND_PCREL	0x80	/* Operand printed as pc-relative symbol */
#define OPERAND_SIGNED	0x100	/* Operand printed as signed value */
#define OPERAND_LENGTH	0x200	/* Operand printed as length (+1) */

enum {
	UNUSED,	/* Indicates the end of the operand list */
	R_8,	/* GPR starting at position 8 */
	R_12,	/* GPR starting at position 12 */
	R_16,	/* GPR starting at position 16 */
	R_20,	/* GPR starting at position 20 */
	R_24,	/* GPR starting at position 24 */
	R_28,	/* GPR starting at position 28 */
	R_32,	/* GPR starting at position 32 */
	F_8,	/* FPR starting at position 8 */
	F_12,	/* FPR starting at position 12 */
	F_16,	/* FPR starting at position 16 */
	F_20,	/* FPR starting at position 16 */
	F_24,	/* FPR starting at position 24 */
	F_28,	/* FPR starting at position 28 */
	F_32,	/* FPR starting at position 32 */
	A_8,	/* Access reg. starting at position 8 */
	A_12,	/* Access reg. starting at position 12 */
	A_24,	/* Access reg. starting at position 24 */
	A_28,	/* Access reg. starting at position 28 */
	C_8,	/* Control reg. starting at position 8 */
	C_12,	/* Control reg. starting at position 12 */
	B_16,	/* Base register starting at position 16 */
	B_32,	/* Base register starting at position 32 */
	X_12,	/* Index register starting at position 12 */
	D_20,	/* Displacement starting at position 20 */
	D_36,	/* Displacement starting at position 36 */
	D20_20,	/* 20 bit displacement starting at 20 */
	L4_8,	/* 4 bit length starting at position 8 */
	L4_12,	/* 4 bit length starting at position 12 */
	L8_8,	/* 8 bit length starting at position 8 */
	U4_8,	/* 4 bit unsigned value starting at 8 */
	U4_12,	/* 4 bit unsigned value starting at 12 */
	U4_16,	/* 4 bit unsigned value starting at 16 */
	U4_20,	/* 4 bit unsigned value starting at 20 */
	U8_8,	/* 8 bit unsigned value starting at 8 */
	U8_16,	/* 8 bit unsigned value starting at 16 */
	I16_16,	/* 16 bit signed value starting at 16 */
	U16_16,	/* 16 bit unsigned value starting at 16 */
	J16_16,	/* PC relative jump offset at 16 */
	J32_16,	/* PC relative long offset at 16 */
	I32_16,	/* 32 bit signed value starting at 16 */
	U32_16,	/* 32 bit unsigned value starting at 16 */
	M_16,	/* 4 bit optional mask starting at 16 */
	RO_28,	/* optional GPR starting at position 28 */
};

/*
 * Enumeration of the different instruction formats.
 * For details consult the principles of operation.
 */
enum {
	INSTR_INVALID,
	INSTR_E, INSTR_RIE_RRP, INSTR_RIL_RI, INSTR_RIL_RP, INSTR_RIL_RU,
	INSTR_RIL_UP, INSTR_RI_RI, INSTR_RI_RP, INSTR_RI_RU, INSTR_RI_UP