| /* |
| * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * Amit Bhor, Sameer Dhavale: Codito Technologies 2004 |
| */ |
| #ifndef __ASM_ARC_PTRACE_H |
| #define __ASM_ARC_PTRACE_H |
| |
| #include <uapi/asm/ptrace.h> |
| |
| #ifndef __ASSEMBLY__ |
| |
| /* THE pt_regs: Defines how regs are saved during entry into kernel */ |
| |
| #ifdef CONFIG_ISA_ARCOMPACT |
| struct pt_regs { |
| |
| /* Real registers */ |
| long bta; /* bta_l1, bta_l2, erbta */ |
| |
| long lp_start, lp_end, lp_count; |
| |
| long status32; /* status32_l1, status32_l2, erstatus */ |
| long ret; /* ilink1, ilink2 or eret */ |
| long blink; |
| long fp; |
| long r26; /* gp */ |
| |
| long r12, r11, r10, r9, r8, r7, r6, r5, r4, r3, r2, r1, r0; |
| |
| long sp; /* user/kernel sp depending on where we came from */ |
| 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 |
| */ |
| union { |
| struct { |
| #ifdef CONFIG_CPU_BIG_ENDIAN |
| unsigned long state:8, ecr_vec:8, |
| ecr_cause:8, ecr_param:8; |
| #else |
| unsigned long ecr_param:8, ecr_cause:8, |
| ecr_vec:8, state:8; |
| #endif |
| }; |
| unsigned long event; |
| }; |
| |
| long user_r25; |
| }; |
| #else |
| |
| struct pt_regs { |
| |
| long orig_r0; |
| |
| union { |
| struct { |
| #ifdef CONFIG_CPU_BIG_ENDIAN |
| unsigned long state:8, ecr_vec:8, |
| ecr_cause:8, ecr_param:8; |
| #else |
| unsigned long ecr_param:8, ecr_cause:8, |
| ecr_vec:8, state:8; |
| #endif |
| }; |
| unsigned long event; |
| }; |
| |
| long bta; /* bta_l1, bta_l2, erbta */ |
| |
| long user_r25; |
| |
| long r26; /* gp */ |
| long fp; |
| long sp; /* user/kernel sp depending on where we came from */ |
| |
| long r12; |
| |
| /*------- Below list auto saved by h/w -----------*/ |
| long r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11; |
| |
| long blink; |
| long lp_end, lp_start, lp_count; |
| |
| long ei, ldi, jli; |
| |
| long ret; |
| long status32; |
| }; |
| |
| #endif |
| |
| /* Callee saved registers - need to be saved only when you are scheduled out */ |
| |
| struct callee_regs { |
| long r25, r24, r23, r22, r21, r20, r19, r18, r17, r16, r15, r14, r13; |
| }; |
| |
| #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(reg) (reg->state |= STATE_SCALL_RESTARTED) |
| #define syscall_restartable(reg) !(reg->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 regs->r0; |
| } |
| |
| #endif /* !__ASSEMBLY__ */ |
| |
| #endif /* __ASM_PTRACE_H */ |