- /*
- * include/asm-s390/ptrace.h
- *
- * S390 version
- * Copyright (C) 1999,2000 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 0x04
- #define PT_GPR0 0x08
- #define PT_GPR1 0x0C
- #define PT_GPR2 0x10
- #define PT_GPR3 0x14
- #define PT_GPR4 0x18
- #define PT_GPR5 0x1C
- #define PT_GPR6 0x20
- #define PT_GPR7 0x24
- #define PT_GPR8 0x28
- #define PT_GPR9 0x2C
- #define PT_GPR10 0x30
- #define PT_GPR11 0x34
- #define PT_GPR12 0x38
- #define PT_GPR13 0x3C
- #define PT_GPR14 0x40
- #define PT_GPR15 0x44
- #define PT_ACR0 0x48
- #define PT_ACR1 0x4C
- #define PT_ACR2 0x50
- #define PT_ACR3 0x54
- #define PT_ACR4 0x58
- #define PT_ACR5 0x5C
- #define PT_ACR6 0x60
- #define PT_ACR7 0x64
- #define PT_ACR8 0x68
- #define PT_ACR9 0x6C
- #define PT_ACR10 0x70
- #define PT_ACR11 0x74
- #define PT_ACR12 0x78
- #define PT_ACR13 0x7C
- #define PT_ACR14 0x80
- #define PT_ACR15 0x84
- #define PT_ORIGGPR2 0x88
- #define PT_FPC 0x90
- /*
- * A nasty fact of life that the ptrace api
- * only supports passing of longs.
- */
- #define PT_FPR0_HI 0x98
- #define PT_FPR0_LO 0x9C
- #define PT_FPR1_HI 0xA0
- #define PT_FPR1_LO 0xA4
- #define PT_FPR2_HI 0xA8
- #define PT_FPR2_LO 0xAC
- #define PT_FPR3_HI 0xB0
- #define PT_FPR3_LO 0xB4
- #define PT_FPR4_HI 0xB8
- #define PT_FPR4_LO 0xBC
- #define PT_FPR5_HI 0xC0
- #define PT_FPR5_LO 0xC4
- #define PT_FPR6_HI 0xC8
- #define PT_FPR6_LO 0xCC
- #define PT_FPR7_HI 0xD0
- #define PT_FPR7_LO 0xD4
- #define PT_FPR8_HI 0xD8
- #define PT_FPR8_LO 0XDC
- #define PT_FPR9_HI 0xE0
- #define PT_FPR9_LO 0xE4
- #define PT_FPR10_HI 0xE8
- #define PT_FPR10_LO 0xEC
- #define PT_FPR11_HI 0xF0
- #define PT_FPR11_LO 0xF4
- #define PT_FPR12_HI 0xF8
- #define PT_FPR12_LO 0xFC
- #define PT_FPR13_HI 0x100
- #define PT_FPR13_LO 0x104
- #define PT_FPR14_HI 0x108
- #define PT_FPR14_LO 0x10C
- #define PT_FPR15_HI 0x110
- #define PT_FPR15_LO 0x114
- #define PT_CR_9 0x118
- #define PT_CR_10 0x11C
- #define PT_CR_11 0x120
- #define PT_IEEE_IP 0x13C
- #define PT_LASTOFF PT_IEEE_IP
- #define PT_ENDREGS 0x140-1
- #define NUM_GPRS 16
- #define NUM_FPRS 16
- #define NUM_CRS 16
- #define NUM_ACRS 16
- #define GPR_SIZE 4
- #define FPR_SIZE 8
- #define FPC_SIZE 4
- #define FPC_PAD_SIZE 4 /* gcc insists on aligning the fpregs */
- #define CR_SIZE 4
- #define ACR_SIZE 4
- #define STACK_FRAME_OVERHEAD 96 /* 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
- {
- __u32 mask;
- __u32 addr;
- } __attribute__ ((aligned(8))) psw_t;
- #ifdef __KERNEL__
- #define FIX_PSW(addr) ((unsigned long)(addr)|0x80000000UL)
- #define ADDR_BITS_REMOVE(addr) ((addr)&0x7fffffff)
- #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;
- __u32 gprs[NUM_GPRS];
- __u32 acrs[NUM_ACRS];
- __u32 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;
- __u32 gprs[NUM_GPRS];
- __u32 acrs[NUM_ACRS];
- __u32 orig_gpr2;
- __u32 trap;
- };
- /*
- * Now for the program event recording (trace) definitions.
- */
- typedef struct
- {
- __u32 cr[3];
- } per_cr_words;
- #define PER_EM_MASK 0xE8000000
- typedef struct
- {
- 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; /* 0x096 */
- __u32 address; /* 0x098 */
- __u8 access_id; /* 0x0a1 */
- } 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 : 4;
- 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
- */
- __u32 starting_addr;
- __u32 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;
- __u32 gprs[NUM_GPRS];
- __u32 acrs[NUM_ACRS];
- __u32 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 /* _S390_PTRACE_H */