ptrace.h
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上传日期:2013-02-24
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- /*
- * linux/include/asm-arm/proc-armo/ptrace.h
- *
- * Copyright (C) 1996-2001 Russell King
- *
- * 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.
- */
- #ifndef __ASM_PROC_PTRACE_H
- #define __ASM_PROC_PTRACE_H
- #define USR26_MODE 0x00
- #define FIQ26_MODE 0x01
- #define IRQ26_MODE 0x02
- #define SVC26_MODE 0x03
- #define USR_MODE USR26_MODE
- #define FIQ_MODE FIQ26_MODE
- #define IRQ_MODE IRQ26_MODE
- #define SVC_MODE SVC26_MODE
- #define MODE_MASK 0x03
- #define F_BIT (1 << 26)
- #define I_BIT (1 << 27)
- #define CC_V_BIT (1 << 28)
- #define CC_C_BIT (1 << 29)
- #define CC_Z_BIT (1 << 30)
- #define CC_N_BIT (1 << 31)
- #define PCMASK 0xfc000003
- #ifndef __ASSEMBLY__
- /* this struct defines the way the registers are stored on the
- stack during a system call. */
- struct pt_regs {
- long uregs[17];
- };
- #define ARM_pc uregs[15]
- #define ARM_lr uregs[14]
- #define ARM_sp uregs[13]
- #define ARM_ip uregs[12]
- #define ARM_fp uregs[11]
- #define ARM_r10 uregs[10]
- #define ARM_r9 uregs[9]
- #define ARM_r8 uregs[8]
- #define ARM_r7 uregs[7]
- #define ARM_r6 uregs[6]
- #define ARM_r5 uregs[5]
- #define ARM_r4 uregs[4]
- #define ARM_r3 uregs[3]
- #define ARM_r2 uregs[2]
- #define ARM_r1 uregs[1]
- #define ARM_r0 uregs[0]
- #define ARM_ORIG_r0 uregs[16]
- #ifdef __KERNEL__
- #define processor_mode(regs)
- ((regs)->ARM_pc & MODE_MASK)
- #define user_mode(regs)
- (processor_mode(regs) == USR26_MODE)
- #define thumb_mode(regs) (0)
- #define interrupts_enabled(regs)
- (!((regs)->ARM_pc & I_BIT))
- #define fast_interrupts_enabled(regs)
- (!((regs)->ARM_pc & F_BIT))
- #define condition_codes(regs)
- ((regs)->ARM_pc & (CC_V_BIT|CC_C_BIT|CC_Z_BIT|CC_N_BIT))
- /* Are the current registers suitable for user mode?
- * (used to maintain security in signal handlers)
- */
- static inline int valid_user_regs(struct pt_regs *regs)
- {
- if (user_mode(regs) &&
- (regs->ARM_pc & (F_BIT | I_BIT)) == 0)
- return 1;
- /*
- * force it to be something sensible
- */
- regs->ARM_pc &= ~(MODE_MASK | F_BIT | I_BIT);
- return 0;
- }
- #endif /* __KERNEL__ */
- #endif /* __ASSEMBLY__ */
- #endif