/* * 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 #include #include #include #include /* this typedef defines how a Program Status Word looks like */ typedef struct { __u32 mask; __u32 addr; } psw_t __attribute__ ((aligned(8))); #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, gdb_pt_regs and user_regs_struct * are common for all three 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; __u32 old_ilc; }; /* * The gdb_pt_regs struct is used instead of the pt_regs structure * if kernel remote debugging is used. */ #if CONFIG_REMOTE_DEBUG struct gdb_pt_regs { psw_t psw; __u32 gprs[NUM_GPRS]; __u32 acrs[NUM_ACRS]; __u32 orig_gpr2; __u32 trap; __u32 crs[16]; s390_fp_regs fp_regs; __u32 old_ilc; }; #endif /* * Now for the program event recording (trace) definitions. */ typedef struct { __u32 cr[3]; } per_cr_words __attribute__((packed)); #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 __attribute__((packed)); typedef struct { __u16 perc_atmid; /* 0x096 */ __u32 address; /* 0x098 */ __u8 access_id; /* 0x0a1 */ } per_lowcore_words __attribute__((packed)); 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 __attribute__((packed)); typedef struct { union { per_cr_words words; per_cr_bits bits; } control_regs __attribute__((packed)); /* * 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 __attribute__((packed)); 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 */