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16#ifndef _ASM_IA64_PTRACE_H
17#define _ASM_IA64_PTRACE_H
18
19#ifndef ASM_OFFSETS_C
20#include <asm/asm-offsets.h>
21#endif
22#include <uapi/asm/ptrace.h>
23
24
25
26
27
28#if defined(CONFIG_IA64_PAGE_SIZE_4KB)
29# define KERNEL_STACK_SIZE_ORDER 3
30#elif defined(CONFIG_IA64_PAGE_SIZE_8KB)
31# define KERNEL_STACK_SIZE_ORDER 2
32#elif defined(CONFIG_IA64_PAGE_SIZE_16KB)
33# define KERNEL_STACK_SIZE_ORDER 1
34#else
35# define KERNEL_STACK_SIZE_ORDER 0
36#endif
37
38#define IA64_RBS_OFFSET ((IA64_TASK_SIZE + IA64_THREAD_INFO_SIZE + 31) & ~31)
39#define IA64_STK_OFFSET ((1 << KERNEL_STACK_SIZE_ORDER)*PAGE_SIZE)
40
41#define KERNEL_STACK_SIZE IA64_STK_OFFSET
42
43#ifndef __ASSEMBLY__
44
45#include <asm/current.h>
46#include <asm/page.h>
47
48
49
50
51
52
53# define instruction_pointer(regs) ((regs)->cr_iip + ia64_psr(regs)->ri)
54
55static inline unsigned long user_stack_pointer(struct pt_regs *regs)
56{
57 return regs->r12;
58}
59
60static inline int is_syscall_success(struct pt_regs *regs)
61{
62 return regs->r10 != -1;
63}
64
65static inline long regs_return_value(struct pt_regs *regs)
66{
67 if (is_syscall_success(regs))
68 return regs->r8;
69 else
70 return -regs->r8;
71}
72
73
74
75
76#define profile_pc(regs) \
77({ \
78 unsigned long __ip = instruction_pointer(regs); \
79 (__ip & ~3UL) + ((__ip & 3UL) << 2); \
80})
81
82
83# define task_pt_regs(t) (((struct pt_regs *) ((char *) (t) + IA64_STK_OFFSET)) - 1)
84# define ia64_psr(regs) ((struct ia64_psr *) &(regs)->cr_ipsr)
85# define user_mode(regs) (((struct ia64_psr *) &(regs)->cr_ipsr)->cpl != 0)
86# define user_stack(task,regs) ((long) regs - (long) task == IA64_STK_OFFSET - sizeof(*regs))
87# define fsys_mode(task,regs) \
88 ({ \
89 struct task_struct *_task = (task); \
90 struct pt_regs *_regs = (regs); \
91 !user_mode(_regs) && user_stack(_task, _regs); \
92 })
93
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104
105
106# define force_successful_syscall_return() (task_pt_regs(current)->r8 = 0)
107
108 struct task_struct;
109 struct unw_frame_info;
110
111 extern unsigned long ia64_get_user_rbs_end (struct task_struct *, struct pt_regs *,
112 unsigned long *);
113 extern long ia64_peek (struct task_struct *, struct switch_stack *, unsigned long,
114 unsigned long, long *);
115 extern long ia64_poke (struct task_struct *, struct switch_stack *, unsigned long,
116 unsigned long, long);
117 extern void ia64_flush_fph (struct task_struct *);
118 extern void ia64_sync_fph (struct task_struct *);
119 extern void ia64_sync_krbs(void);
120 extern long ia64_sync_user_rbs (struct task_struct *, struct switch_stack *,
121 unsigned long, unsigned long);
122
123
124 extern unsigned long ia64_get_scratch_nat_bits (struct pt_regs *pt, unsigned long scratch_unat);
125
126 extern unsigned long ia64_put_scratch_nat_bits (struct pt_regs *pt, unsigned long nat);
127
128 extern void ia64_increment_ip (struct pt_regs *pt);
129 extern void ia64_decrement_ip (struct pt_regs *pt);
130
131 extern void ia64_ptrace_stop(void);
132 #define arch_ptrace_stop(code, info) \
133 ia64_ptrace_stop()
134 #define arch_ptrace_stop_needed(code, info) \
135 (!test_thread_flag(TIF_RESTORE_RSE))
136
137 extern void ptrace_attach_sync_user_rbs (struct task_struct *);
138 #define arch_ptrace_attach(child) \
139 ptrace_attach_sync_user_rbs(child)
140
141 #define arch_has_single_step() (1)
142 #define arch_has_block_step() (1)
143
144#endif
145#endif
146