| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * S390 version |
| * Copyright IBM Corp. 1999, 2000 |
| * Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) |
| */ |
| #ifndef _S390_PTRACE_H |
| #define _S390_PTRACE_H |
| |
| #include <linux/bits.h> |
| #include <uapi/asm/ptrace.h> |
| |
| #define PIF_SYSCALL 0 /* inside a system call */ |
| #define PIF_PER_TRAP 1 /* deliver sigtrap on return to user */ |
| #define PIF_SYSCALL_RESTART 2 /* restart the current system call */ |
| #define PIF_GUEST_FAULT 3 /* indicates program check in sie64a */ |
| |
| #define _PIF_SYSCALL BIT(PIF_SYSCALL) |
| #define _PIF_PER_TRAP BIT(PIF_PER_TRAP) |
| #define _PIF_SYSCALL_RESTART BIT(PIF_SYSCALL_RESTART) |
| #define _PIF_GUEST_FAULT BIT(PIF_GUEST_FAULT) |
| |
| #ifndef __ASSEMBLY__ |
| |
| #define PSW_KERNEL_BITS (PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_ASC_HOME | \ |
| PSW_MASK_EA | PSW_MASK_BA) |
| #define PSW_USER_BITS (PSW_MASK_DAT | PSW_MASK_IO | PSW_MASK_EXT | \ |
| PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_MCHECK | \ |
| PSW_MASK_PSTATE | PSW_ASC_PRIMARY) |
| |
| struct psw_bits { |
| unsigned long : 1; |
| unsigned long per : 1; /* PER-Mask */ |
| unsigned long : 3; |
| unsigned long dat : 1; /* DAT Mode */ |
| unsigned long io : 1; /* Input/Output Mask */ |
| unsigned long ext : 1; /* External Mask */ |
| unsigned long key : 4; /* PSW Key */ |
| unsigned long : 1; |
| unsigned long mcheck : 1; /* Machine-Check Mask */ |
| unsigned long wait : 1; /* Wait State */ |
| unsigned long pstate : 1; /* Problem State */ |
| unsigned long as : 2; /* Address Space Control */ |
| unsigned long cc : 2; /* Condition Code */ |
| unsigned long pm : 4; /* Program Mask */ |
| unsigned long ri : 1; /* Runtime Instrumentation */ |
| unsigned long : 6; |
| unsigned long eaba : 2; /* Addressing Mode */ |
| unsigned long : 31; |
| unsigned long ia : 64; /* Instruction Address */ |
| }; |
| |
| enum { |
| PSW_BITS_AMODE_24BIT = 0, |
| PSW_BITS_AMODE_31BIT = 1, |
| PSW_BITS_AMODE_64BIT = 3 |
| }; |
| |
| enum { |
| PSW_BITS_AS_PRIMARY = 0, |
| PSW_BITS_AS_ACCREG = 1, |
| PSW_BITS_AS_SECONDARY = 2, |
| PSW_BITS_AS_HOME = 3 |
| }; |
| |
| #define psw_bits(__psw) (*({ \ |
| typecheck(psw_t, __psw); \ |
| &(*(struct psw_bits *)(&(__psw))); \ |
| })) |
| |
| /* |
| * The pt_regs struct defines the way the registers are stored on |
| * the stack during a system call. |
| */ |
| struct pt_regs |
| { |
| union { |
| user_pt_regs user_regs; |
| struct { |
| unsigned long args[1]; |
| psw_t psw; |
| unsigned long gprs[NUM_GPRS]; |
| }; |
| }; |
| unsigned long orig_gpr2; |
| unsigned int int_code; |
| unsigned int int_parm; |
| unsigned long int_parm_long; |
| unsigned long flags; |
| }; |
| |
| /* |
| * Program event recording (PER) register set. |
| */ |
| struct per_regs { |
| unsigned long control; /* PER control bits */ |
| unsigned long start; /* PER starting address */ |
| unsigned long end; /* PER ending address */ |
| }; |
| |
| /* |
| * PER event contains information about the cause of the last PER exception. |
| */ |
| struct per_event { |
| unsigned short cause; /* PER code, ATMID and AI */ |
| unsigned long address; /* PER address */ |
| unsigned char paid; /* PER access identification */ |
| }; |
| |
| /* |
| * Simplified per_info structure used to decode the ptrace user space ABI. |
| */ |
| struct per_struct_kernel { |
| unsigned long cr9; /* PER control bits */ |
| unsigned long cr10; /* PER starting address */ |
| unsigned long cr11; /* PER ending address */ |
| unsigned long bits; /* Obsolete software bits */ |
| unsigned long starting_addr; /* User specified start address */ |
| unsigned long ending_addr; /* User specified end address */ |
| unsigned short perc_atmid; /* PER trap ATMID */ |
| unsigned long address; /* PER trap instruction address */ |
| unsigned char access_id; /* PER trap access identification */ |
| }; |
| |
| #define PER_EVENT_MASK 0xEB000000UL |
| |
| #define PER_EVENT_BRANCH 0x80000000UL |
| #define PER_EVENT_IFETCH 0x40000000UL |
| #define PER_EVENT_STORE 0x20000000UL |
| #define PER_EVENT_STORE_REAL 0x08000000UL |
| #define PER_EVENT_TRANSACTION_END 0x02000000UL |
| #define PER_EVENT_NULLIFICATION 0x01000000UL |
| |
| #define PER_CONTROL_MASK 0x00e00000UL |
| |
| #define PER_CONTROL_BRANCH_ADDRESS 0x00800000UL |
| #define PER_CONTROL_SUSPENSION 0x00400000UL |
| #define PER_CONTROL_ALTERATION 0x00200000UL |
| |
| static inline void set_pt_regs_flag(struct pt_regs *regs, int flag) |
| { |
| regs->flags |= (1UL << flag); |
| } |
| |
| static inline void clear_pt_regs_flag(struct pt_regs *regs, int flag) |
| { |
| regs->flags &= ~(1UL << flag); |
| } |
| |
| static inline int test_pt_regs_flag(struct pt_regs *regs, int flag) |
| { |
| return !!(regs->flags & (1UL << flag)); |
| } |
| |
| /* |
| * These are defined as per linux/ptrace.h, which see. |
| */ |
| #define arch_has_single_step() (1) |
| #define arch_has_block_step() (1) |
| |
| #define user_mode(regs) (((regs)->psw.mask & PSW_MASK_PSTATE) != 0) |
| #define instruction_pointer(regs) ((regs)->psw.addr) |
| #define user_stack_pointer(regs)((regs)->gprs[15]) |
| #define profile_pc(regs) instruction_pointer(regs) |
| |
| static inline long regs_return_value(struct pt_regs *regs) |
| { |
| return regs->gprs[2]; |
| } |
| |
| static inline void instruction_pointer_set(struct pt_regs *regs, |
| unsigned long val) |
| { |
| regs->psw.addr = val; |
| } |
| |
| int regs_query_register_offset(const char *name); |
| const char *regs_query_register_name(unsigned int offset); |
| unsigned long regs_get_register(struct pt_regs *regs, unsigned int offset); |
| unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n); |
| |
| static inline unsigned long kernel_stack_pointer(struct pt_regs *regs) |
| { |
| return regs->gprs[15]; |
| } |
| |
| #endif /* __ASSEMBLY__ */ |
| #endif /* _S390_PTRACE_H */ |