2 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
8 * Amit Bhor, Sameer Dhavale: Codito Technologies 2004
10 #ifndef __ASM_ARC_PTRACE_H
11 #define __ASM_ARC_PTRACE_H
13 #include <uapi/asm/ptrace.h>
17 /* THE pt_regs: Defines how regs are saved during entry into kernel */
22 long bta; /* bta_l1, bta_l2, erbta */
26 long status32; /* status32_l1, status32_l2, erstatus */
27 long ret; /* ilink1, ilink2 or eret */
44 long sp; /* user/kernel sp depending on where we came from */
47 /*to distinguish bet excp, syscall, irq */
49 #ifdef CONFIG_CPU_BIG_ENDIAN
50 /* so that assembly code is same for LE/BE */
51 unsigned long orig_r8:16, event:16;
53 unsigned long event:16, orig_r8:16;
59 /* Callee saved registers - need to be saved only when you are scheduled out */
77 #define instruction_pointer(regs) ((regs)->ret)
78 #define profile_pc(regs) instruction_pointer(regs)
80 /* return 1 if user mode or 0 if kernel mode */
81 #define user_mode(regs) (regs->status32 & STATUS_U_MASK)
83 #define user_stack_pointer(regs)\
85 if (user_mode(regs)) \
92 /* return 1 if PC in delay slot */
93 #define delay_mode(regs) ((regs->status32 & STATUS_DE_MASK) == STATUS_DE_MASK)
95 #define in_syscall(regs) (regs->event & orig_r8_IS_SCALL)
96 #define in_brkpt_trap(regs) (regs->event & orig_r8_IS_BRKPT)
98 #define syscall_wont_restart(regs) (regs->event |= orig_r8_IS_SCALL_RESTARTED)
99 #define syscall_restartable(regs) !(regs->event & orig_r8_IS_SCALL_RESTARTED)
101 #define current_pt_regs() \
103 /* open-coded current_thread_info() */ \
104 register unsigned long sp asm ("sp"); \
105 unsigned long pg_start = (sp & ~(THREAD_SIZE - 1)); \
106 (struct pt_regs *)(pg_start + THREAD_SIZE) - 1; \
109 static inline long regs_return_value(struct pt_regs *regs)
114 #endif /* !__ASSEMBLY__ */
116 #define orig_r8_IS_SCALL 0x0001
117 #define orig_r8_IS_SCALL_RESTARTED 0x0002
118 #define orig_r8_IS_BRKPT 0x0004
119 #define orig_r8_IS_EXCPN 0x0008
120 #define orig_r8_IS_IRQ1 0x0010
121 #define orig_r8_IS_IRQ2 0x0020
123 #endif /* __ASM_PTRACE_H */