652a12ef98
Fix show_regs() to provide a backtrace. Provide a new __show_regs() function which implements the common subset of show_regs() and die(). Add prototypes to asm-arm/system.h Signed-off-by: Russell King <rmk@arm.linux.org.uk>
153 lines
3.3 KiB
C
153 lines
3.3 KiB
C
/*
|
|
* linux/include/asm-arm/ptrace.h
|
|
*
|
|
* Copyright (C) 1996-2003 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_ARM_PTRACE_H
|
|
#define __ASM_ARM_PTRACE_H
|
|
|
|
#include <linux/config.h>
|
|
|
|
#define PTRACE_GETREGS 12
|
|
#define PTRACE_SETREGS 13
|
|
#define PTRACE_GETFPREGS 14
|
|
#define PTRACE_SETFPREGS 15
|
|
|
|
#define PTRACE_GETWMMXREGS 18
|
|
#define PTRACE_SETWMMXREGS 19
|
|
|
|
#define PTRACE_OLDSETOPTIONS 21
|
|
|
|
#define PTRACE_GET_THREAD_AREA 22
|
|
/*
|
|
* PSR bits
|
|
*/
|
|
#define USR26_MODE 0x00000000
|
|
#define FIQ26_MODE 0x00000001
|
|
#define IRQ26_MODE 0x00000002
|
|
#define SVC26_MODE 0x00000003
|
|
#define USR_MODE 0x00000010
|
|
#define FIQ_MODE 0x00000011
|
|
#define IRQ_MODE 0x00000012
|
|
#define SVC_MODE 0x00000013
|
|
#define ABT_MODE 0x00000017
|
|
#define UND_MODE 0x0000001b
|
|
#define SYSTEM_MODE 0x0000001f
|
|
#define MODE32_BIT 0x00000010
|
|
#define MODE_MASK 0x0000001f
|
|
#define PSR_T_BIT 0x00000020
|
|
#define PSR_F_BIT 0x00000040
|
|
#define PSR_I_BIT 0x00000080
|
|
#define PSR_J_BIT 0x01000000
|
|
#define PSR_Q_BIT 0x08000000
|
|
#define PSR_V_BIT 0x10000000
|
|
#define PSR_C_BIT 0x20000000
|
|
#define PSR_Z_BIT 0x40000000
|
|
#define PSR_N_BIT 0x80000000
|
|
#define PCMASK 0
|
|
|
|
/*
|
|
* Groups of PSR bits
|
|
*/
|
|
#define PSR_f 0xff000000 /* Flags */
|
|
#define PSR_s 0x00ff0000 /* Status */
|
|
#define PSR_x 0x0000ff00 /* Extension */
|
|
#define PSR_c 0x000000ff /* Control */
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
/* this struct defines the way the registers are stored on the
|
|
stack during a system call. */
|
|
|
|
struct pt_regs {
|
|
long uregs[18];
|
|
};
|
|
|
|
#define ARM_cpsr uregs[16]
|
|
#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[17]
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#define user_mode(regs) \
|
|
(((regs)->ARM_cpsr & 0xf) == 0)
|
|
|
|
#ifdef CONFIG_ARM_THUMB
|
|
#define thumb_mode(regs) \
|
|
(((regs)->ARM_cpsr & PSR_T_BIT))
|
|
#else
|
|
#define thumb_mode(regs) (0)
|
|
#endif
|
|
|
|
#define processor_mode(regs) \
|
|
((regs)->ARM_cpsr & MODE_MASK)
|
|
|
|
#define interrupts_enabled(regs) \
|
|
(!((regs)->ARM_cpsr & PSR_I_BIT))
|
|
|
|
#define fast_interrupts_enabled(regs) \
|
|
(!((regs)->ARM_cpsr & PSR_F_BIT))
|
|
|
|
#define condition_codes(regs) \
|
|
((regs)->ARM_cpsr & (PSR_V_BIT|PSR_C_BIT|PSR_Z_BIT|PSR_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_cpsr & (PSR_F_BIT|PSR_I_BIT)) == 0)
|
|
return 1;
|
|
|
|
/*
|
|
* Force CPSR to something logical...
|
|
*/
|
|
regs->ARM_cpsr &= PSR_f | PSR_s | PSR_x | PSR_T_BIT | MODE32_BIT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#define pc_pointer(v) \
|
|
((v) & ~PCMASK)
|
|
|
|
#define instruction_pointer(regs) \
|
|
(pc_pointer((regs)->ARM_pc))
|
|
|
|
#ifdef CONFIG_SMP
|
|
extern unsigned long profile_pc(struct pt_regs *regs);
|
|
#else
|
|
#define profile_pc(regs) instruction_pointer(regs)
|
|
#endif
|
|
|
|
#ifdef __KERNEL__
|
|
#define predicate(x) ((x) & 0xf0000000)
|
|
#define PREDICATE_ALWAYS 0xe0000000
|
|
#endif
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#endif
|
|
|