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Diffstat (limited to 'kernel/arch/arc/include/asm/ptrace.h')
| -rw-r--r-- | kernel/arch/arc/include/asm/ptrace.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/kernel/arch/arc/include/asm/ptrace.h b/kernel/arch/arc/include/asm/ptrace.h new file mode 100644 index 000000000..1bfeec2c0 --- /dev/null +++ b/kernel/arch/arc/include/asm/ptrace.h @@ -0,0 +1,107 @@ +/* + * 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 */ + +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; +}; + +/* 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 */ |