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/*
* include/asm-s390/ptrace.h
*
* S390 version
* Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
*/
#ifndef _S390_PTRACE_H
#define _S390_PTRACE_H
/*
* Offsets in the user_regs_struct. They are used for the ptrace
* system call and in entry.S
*/
#define PT_PSWMASK 0x00
#define PT_PSWADDR 0x08
#define PT_GPR0 0x10
#define PT_GPR1 0x18
#define PT_GPR2 0x20
#define PT_GPR3 0x28
#define PT_GPR4 0x30
#define PT_GPR5 0x38
#define PT_GPR6 0x40
#define PT_GPR7 0x48
#define PT_GPR8 0x50
#define PT_GPR9 0x58
#define PT_GPR10 0x60
#define PT_GPR11 0x68
#define PT_GPR12 0x70
#define PT_GPR13 0x78
#define PT_GPR14 0x80
#define PT_GPR15 0x88
#define PT_ACR0 0x90
#define PT_ACR1 0x94
#define PT_ACR2 0x98
#define PT_ACR3 0x9C
#define PT_ACR4 0xA0
#define PT_ACR5 0xA4
#define PT_ACR6 0xA8
#define PT_ACR7 0xAC
#define PT_ACR8 0xB0
#define PT_ACR9 0xB4
#define PT_ACR10 0xB8
#define PT_ACR11 0xBC
#define PT_ACR12 0xC0
#define PT_ACR13 0xC4
#define PT_ACR14 0xC8
#define PT_ACR15 0xCC
#define PT_ORIGGPR2 0xD0
#define PT_FPC 0xD8
#define PT_FPR0 0xE0
#define PT_FPR1 0xE8
#define PT_FPR2 0xF0
#define PT_FPR3 0xF8
#define PT_FPR4 0x100
#define PT_FPR5 0x108
#define PT_FPR6 0x110
#define PT_FPR7 0x118
#define PT_FPR8 0x120
#define PT_FPR9 0x128
#define PT_FPR10 0x130
#define PT_FPR11 0x138
#define PT_FPR12 0x140
#define PT_FPR13 0x148
#define PT_FPR14 0x150
#define PT_FPR15 0x158
#define PT_CR_9 0x160
#define PT_CR_10 0x168
#define PT_CR_11 0x170
#define PT_IEEE_IP 0x1A8
#define PT_LASTOFF PT_IEEE_IP
#define PT_ENDREGS 0x1B0-1
#define NUM_GPRS 16
#define NUM_FPRS 16
#define NUM_CRS 16
#define NUM_ACRS 16
#define GPR_SIZE 8
#define FPR_SIZE 8
#define FPC_SIZE 4
#define FPC_PAD_SIZE 4 /* gcc insists on aligning the fpregs */
#define CR_SIZE 8
#define ACR_SIZE 4
#define STACK_FRAME_OVERHEAD 160 /* size of minimum stack frame */
#ifndef __ASSEMBLY__
#include <linux/config.h>
#include <linux/stddef.h>
#include <linux/types.h>
#include <asm/current.h>
#include <asm/setup.h>
/* this typedef defines how a Program Status Word looks like */
typedef struct
{
__u64 mask;
__u64 addr;
} __attribute__ ((aligned(8))) psw_t;
#ifdef __KERNEL__
#define FIX_PSW(addr) ((unsigned long)(addr))
#define ADDR_BITS_REMOVE(addr) ((addr))
#endif
typedef union
{
float f;
double d;
__u64 ui;
struct
{
__u32 hi;
__u32 lo;
} fp;
} freg_t;
typedef struct
{
__u32 fpc;
freg_t fprs[NUM_FPRS];
} s390_fp_regs;
#define FPC_EXCEPTION_MASK 0xF8000000
#define FPC_FLAGS_MASK 0x00F80000
#define FPC_DXC_MASK 0x0000FF00
#define FPC_RM_MASK 0x00000003
#define FPC_VALID_MASK 0xF8F8FF03
/*
* The first entries in pt_regs and user_regs_struct
* are common for the two structures. The s390_regs structure
* covers the common parts. It simplifies copying the common part
* between the three structures.
*/
typedef struct
{
psw_t psw;
__u64 gprs[NUM_GPRS];
__u32 acrs[NUM_ACRS];
__u64 orig_gpr2;
} s390_regs;
/*
* The pt_regs struct defines the way the registers are stored on
* the stack during a system call.
*/
struct pt_regs
{
psw_t psw;
__u64 gprs[NUM_GPRS];
__u32 acrs[NUM_ACRS];
__u64 orig_gpr2;
__u32 trap;
} __attribute__ ((packed));
/*
* Now for the program event recording (trace) definitions.
*/
typedef struct
{
__u64 cr[3];
} per_cr_words;
#define PER_EM_MASK 0x00000000E8000000UL
typedef struct
{
unsigned : 32;
unsigned em_branching : 1;
unsigned em_instruction_fetch : 1;
/*
* Switching on storage alteration automatically fixes
* the storage alteration event bit in the users std.
*/
unsigned em_storage_alteration : 1;
unsigned em_gpr_alt_unused : 1;
unsigned em_store_real_address : 1;
unsigned : 3;
unsigned branch_addr_ctl : 1;
unsigned : 1;
unsigned storage_alt_space_ctl : 1;
unsigned : 21;
addr_t starting_addr;
addr_t ending_addr;
} per_cr_bits;
typedef struct
{
__u16 perc_atmid;
addr_t address;
__u8 access_id;
} per_lowcore_words;
typedef struct
{
unsigned perc_branching : 1; /* 0x096 */
unsigned perc_instruction_fetch : 1;
unsigned perc_storage_alteration : 1;
unsigned perc_gpr_alt_unused : 1;
unsigned perc_store_real_address : 1;
unsigned : 3;
unsigned atmid_psw_bit_31 : 1;
unsigned atmid_validity_bit : 1;
unsigned atmid_psw_bit_32 : 1;
unsigned atmid_psw_bit_5 : 1;
unsigned atmid_psw_bit_16 : 1;
unsigned atmid_psw_bit_17 : 1;
unsigned si : 2;
addr_t address; /* 0x098 */
unsigned : 4; /* 0x0a1 */
unsigned access_id : 4;
} per_lowcore_bits;
typedef struct
{
union {
per_cr_words words;
per_cr_bits bits;
} control_regs;
/*
* Use these flags instead of setting em_instruction_fetch
* directly they are used so that single stepping can be
* switched on & off while not affecting other tracing
*/
unsigned single_step : 1;
unsigned instruction_fetch : 1;
unsigned : 30;
/*
* These addresses are copied into cr10 & cr11 if single
* stepping is switched off
*/
addr_t starting_addr;
addr_t ending_addr;
union {
per_lowcore_words words;
per_lowcore_bits bits;
} lowcore;
} per_struct;
typedef struct
{
__u32 len;
addr_t kernel_addr;
addr_t process_addr;
} ptrace_area;
/*
* S/390 specific non posix ptrace requests. I chose unusual values so
* they are unlikely to clash with future ptrace definitions.
*/
#define PTRACE_PEEKUSR_AREA 0x5000
#define PTRACE_POKEUSR_AREA 0x5001
#define PTRACE_PEEKTEXT_AREA 0x5002
#define PTRACE_PEEKDATA_AREA 0x5003
#define PTRACE_POKETEXT_AREA 0x5004
#define PTRACE_POKEDATA_AREA 0x5005
/*
* PT_PROT definition is loosely based on hppa bsd definition in
* gdb/hppab-nat.c
*/
#define PTRACE_PROT 21
typedef enum
{
ptprot_set_access_watchpoint,
ptprot_set_write_watchpoint,
ptprot_disable_watchpoint
} ptprot_flags;
typedef struct
{
addr_t lowaddr;
addr_t hiaddr;
ptprot_flags prot;
} ptprot_area;
/* Sequence of bytes for breakpoint illegal instruction. */
#define S390_BREAKPOINT {0x0,0x1}
#define S390_BREAKPOINT_U16 ((__u16)0x0001)
#define S390_SYSCALL_OPCODE ((__u16)0x0a00)
#define S390_SYSCALL_SIZE 2
/*
* The user_regs_struct defines the way the user registers are
* store on the stack for signal handling.
*/
struct user_regs_struct
{
psw_t psw;
__u64 gprs[NUM_GPRS];
__u32 acrs[NUM_ACRS];
__u64 orig_gpr2;
s390_fp_regs fp_regs;
/*
* These per registers are in here so that gdb can modify them
* itself as there is no "official" ptrace interface for hardware
* watchpoints. This is the way intel does it.
*/
per_struct per_info;
addr_t ieee_instruction_pointer;
/* Used to give failing instruction back to user for ieee exceptions */
};
#ifdef __KERNEL__
#define user_mode(regs) (((regs)->psw.mask & PSW_PROBLEM_STATE) != 0)
#define instruction_pointer(regs) ((regs)->psw.addr)
extern void show_regs(struct pt_regs * regs);
extern char *task_show_regs(struct task_struct *task, char *buffer);
#endif
#endif /* __ASSEMBLY__ */
#endif /* _S390X_PTRACE_H */
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