| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) |
| * |
| * Amit Bhor, Sameer Dhavale: Codito Technologies 2004 |
| */ |
| #ifndef __ASM_ARC_PTRACE_H |
| #define __ASM_ARC_PTRACE_H |
| |
| #include <uapi/asm/ptrace.h> |
| #include <linux/compiler.h> |
| |
| #ifndef __ASSEMBLY__ |
| |
| typedef union { |
| struct { |
| #ifdef CONFIG_CPU_BIG_ENDIAN |
| unsigned long state:8, vec:8, cause:8, param:8; |
| #else |
| unsigned long param:8, cause:8, vec:8, state:8; |
| #endif |
| }; |
| unsigned long full; |
| } ecr_reg; |
| |
| /* THE pt_regs: Defines how regs are saved during entry into kernel */ |
| |
| #ifdef CONFIG_ISA_ARCOMPACT |
| struct pt_regs { |
| |
| /* Real registers */ |
| unsigned long bta; /* bta_l1, bta_l2, erbta */ |
| |
| unsigned long lp_start, lp_end, lp_count; |
| |
| unsigned long status32; /* status32_l1, status32_l2, erstatus */ |
| unsigned long ret; /* ilink1, ilink2 or eret */ |
| unsigned long blink; |
| unsigned long fp; |
| unsigned long r26; /* gp */ |
| |
| unsigned long r12, r11, r10, r9, r8, r7, r6, r5, r4, r3, r2, r1, r0; |
| |
| unsigned long sp; /* User/Kernel depending on where we came from */ |
| unsigned long orig_r0; |
| |
| /* |
| * To distinguish bet excp, syscall, irq |
| * For traps and exceptions, Exception Cause Register. |
| * ECR: <00> <VV> <CC> <PP> |
| * Last word used by Linux for extra state mgmt (syscall-restart) |
| * For interrupts, use artificial ECR values to note current prio-level |
| */ |
| ecr_reg ecr; |
| }; |
| |
| struct callee_regs { |
| unsigned long r25, r24, r23, r22, r21, r20, r19, r18, r17, r16, r15, r14, r13; |
| }; |
| |
| #define MAX_REG_OFFSET offsetof(struct pt_regs, ecr) |
| |
| #else |
| |
| struct pt_regs { |
| |
| unsigned long orig_r0; |
| |
| ecr_reg ecr; /* Exception Cause Reg */ |
| |
| unsigned long bta; /* erbta */ |
| |
| unsigned long fp; |
| unsigned long r30; |
| unsigned long r12; |
| unsigned long r26; /* gp */ |
| |
| #ifdef CONFIG_ARC_HAS_ACCL_REGS |
| unsigned long r58, r59; /* ACCL/ACCH used by FPU / DSP MPY */ |
| #endif |
| #ifdef CONFIG_ARC_DSP_SAVE_RESTORE_REGS |
| unsigned long DSP_CTRL; |
| #endif |
| |
| unsigned long sp; /* user/kernel sp depending on entry */ |
| |
| /*------- Below list auto saved by h/w -----------*/ |
| unsigned long r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11; |
| |
| unsigned long blink; |
| unsigned long lp_end, lp_start, lp_count; |
| |
| unsigned long ei, ldi, jli; |
| |
| unsigned long ret; |
| unsigned long status32; |
| }; |
| |
| struct callee_regs { |
| unsigned long r25, r24, r23, r22, r21, r20, r19, r18, r17, r16, r15, r14, r13; |
| }; |
| |
| #define MAX_REG_OFFSET offsetof(struct pt_regs, status32) |
| |
| #endif |
| |
| #define instruction_pointer(regs) ((regs)->ret) |
| #define profile_pc(regs) instruction_pointer(regs) |
| |
| /* return 1 if user mode or 0 if kernel mode */ |
| #define user_mode(regs) (regs->status32 & STATUS_U_MASK) |
| |
| #define user_stack_pointer(regs)\ |
| ({ unsigned int sp; \ |
| if (user_mode(regs)) \ |
| sp = (regs)->sp;\ |
| else \ |
| sp = -1; \ |
| sp; \ |
| }) |
| |
| /* return 1 if PC in delay slot */ |
| #define delay_mode(regs) ((regs->status32 & STATUS_DE_MASK) == STATUS_DE_MASK) |
| |
| #define in_syscall(regs) ((regs->ecr.vec == ECR_V_TRAP) && !regs->ecr.param) |
| #define in_brkpt_trap(regs) ((regs->ecr.vec == ECR_V_TRAP) && regs->ecr.param) |
| |
| #define STATE_SCALL_RESTARTED 0x01 |
| |
| #define syscall_wont_restart(regs) (regs->ecr.state |= STATE_SCALL_RESTARTED) |
| #define syscall_restartable(regs) !(regs->ecr.state & STATE_SCALL_RESTARTED) |
| |
| #define current_pt_regs() \ |
| ({ \ |
| /* open-coded current_thread_info() */ \ |
| register unsigned long sp asm ("sp"); \ |
| unsigned long pg_start = (sp & ~(THREAD_SIZE - 1)); \ |
| (struct pt_regs *)(pg_start + THREAD_SIZE) - 1; \ |
| }) |
| |
| static inline long regs_return_value(struct pt_regs *regs) |
| { |
| return (long)regs->r0; |
| } |
| |
| static inline void instruction_pointer_set(struct pt_regs *regs, |
| unsigned long val) |
| { |
| instruction_pointer(regs) = val; |
| } |
| |
| static inline unsigned long kernel_stack_pointer(struct pt_regs *regs) |
| { |
| return regs->sp; |
| } |
| |
| extern int regs_query_register_offset(const char *name); |
| extern const char *regs_query_register_name(unsigned int offset); |
| extern bool regs_within_kernel_stack(struct pt_regs *regs, unsigned long addr); |
| extern unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, |
| unsigned int n); |
| |
| static inline unsigned long regs_get_register(struct pt_regs *regs, |
| unsigned int offset) |
| { |
| if (unlikely(offset > MAX_REG_OFFSET)) |
| return 0; |
| |
| return *(unsigned long *)((unsigned long)regs + offset); |
| } |
| |
| extern int syscall_trace_entry(struct pt_regs *); |
| extern void syscall_trace_exit(struct pt_regs *); |
| |
| #endif /* !__ASSEMBLY__ */ |
| |
| #endif /* __ASM_PTRACE_H */ |