1 #ifndef _ASM_IA64_PTRACE_H
2 #define _ASM_IA64_PTRACE_H
5 * Copyright (C) 1998-2001 Suresh Siddha <suresh.b.siddha@intel.com>
6 * Copyright (C) 1998-2001 Hewlett-Packard Co
7 * Copyright (C) 1998-2001 David Mosberger-Tang <davidm@hpl.hp.com>
8 * Copyright (C) 1998, 1999 Stephane Eranian <eranian@hpl.hp.com>
10 * 12/07/98 S. Eranian added pt_regs & switch_stack
11 * 12/21/98 D. Mosberger updated to match latest code
12 * 6/17/99 D. Mosberger added second unat member to "struct switch_stack"
16 * When a user process is blocked, its state looks as follows:
18 * +----------------------+ ------- IA64_STK_OFFSET
20 * | struct pt_regs | |
22 * +----------------------+ |
25 * | (growing downwards) | |
26 * //.....................// |
28 * //.....................// |
30 * +----------------------+ |
31 * | struct switch_stack | |
33 * +----------------------+ |
35 * //.....................// |
37 * //.....................// |
39 * | register stack | |
40 * | (growing upwards) | |
42 * +----------------------+ | --- IA64_RBS_OFFSET
44 * | struct task_struct | | |
46 * +----------------------+ -------
48 * Note that ar.ec is not saved explicitly in pt_reg or switch_stack.
49 * This is because ar.ec is saved as part of ar.pfs.
52 #include <linux/config.h>
55 #include <asm/offsets.h>
58 * Base-2 logarithm of number of pages to allocate per task structure
59 * (including register backing store and memory stack):
61 #if defined(CONFIG_IA64_PAGE_SIZE_4KB)
62 # define IA64_TASK_STRUCT_LOG_NUM_PAGES 3
63 #elif defined(CONFIG_IA64_PAGE_SIZE_8KB)
64 # define IA64_TASK_STRUCT_LOG_NUM_PAGES 2
65 #elif defined(CONFIG_IA64_PAGE_SIZE_16KB)
66 # define IA64_TASK_STRUCT_LOG_NUM_PAGES 1
68 # define IA64_TASK_STRUCT_LOG_NUM_PAGES 0
71 #define IA64_RBS_OFFSET ((IA64_TASK_SIZE + 15) & ~15)
72 #define IA64_STK_OFFSET ((1 << IA64_TASK_STRUCT_LOG_NUM_PAGES)*PAGE_SIZE)
74 #define INIT_TASK_SIZE IA64_STK_OFFSET
78 #include <asm/current.h>
82 * This struct defines the way the registers are saved on system
85 * We don't save all floating point register because the kernel
86 * is compiled to use only a very small subset, so the other are
89 * THIS STRUCTURE MUST BE A MULTIPLE 16-BYTE IN SIZE
90 * (because the memory stack pointer MUST ALWAYS be aligned this way)
94 /* In break_fault, only registers from cr_ipsr to r15 are saved.
95 * In any other interruptions, the registers cr_ipsr~r15, r8~r11, and r14~r3 are saved by
96 * SAVE_MIN and all other registers are saved by SAVE_REST.
98 unsigned long b6; /* scratch */
99 unsigned long b7; /* scratch */
101 unsigned long ar_csd; /* used by cmp8xchg16 (scratch) */
102 unsigned long ar_ssd; /* reserved for future use (scratch) */
104 unsigned long r8; /* scratch (return value register 0) */
105 unsigned long r9; /* scratch (return value register 1) */
106 unsigned long r10; /* scratch (return value register 2) */
107 unsigned long r11; /* scratch (return value register 3) */
109 unsigned long cr_ipsr; /* interrupted task's psr */
110 unsigned long cr_iip; /* interrupted task's instruction pointer */
111 unsigned long cr_ifs; /* interrupted task's function state */
113 unsigned long ar_unat; /* interrupted task's NaT register (preserved) */
114 unsigned long ar_pfs; /* prev function state */
115 unsigned long ar_rsc; /* RSE configuration */
116 /* The following two are valid only if cr_ipsr.cpl > 0: */
117 unsigned long ar_rnat; /* RSE NaT */
118 unsigned long ar_bspstore; /* RSE bspstore */
120 unsigned long pr; /* 64 predicate registers (1 bit each) */
121 unsigned long b0; /* return pointer (bp) */
122 unsigned long loadrs; /* size of dirty partition << 16 */
124 unsigned long r1; /* the gp pointer */
125 unsigned long r12; /* interrupted task's memory stack pointer */
126 unsigned long r13; /* thread pointer */
128 unsigned long ar_fpsr; /* floating point status (preserved) */
129 unsigned long r15; /* scratch */
131 unsigned long r14; /* scratch */
132 unsigned long r2; /* scratch */
133 unsigned long r3; /* scratch */
135 unsigned long r16; /* scratch */
136 unsigned long r17; /* scratch */
137 unsigned long r18; /* scratch */
138 unsigned long r19; /* scratch */
139 unsigned long r20; /* scratch */
140 unsigned long r21; /* scratch */
141 unsigned long r22; /* scratch */
142 unsigned long r23; /* scratch */
143 unsigned long r24; /* scratch */
144 unsigned long r25; /* scratch */
145 unsigned long r26; /* scratch */
146 unsigned long r27; /* scratch */
147 unsigned long r28; /* scratch */
148 unsigned long r29; /* scratch */
149 unsigned long r30; /* scratch */
150 unsigned long r31; /* scratch */
152 unsigned long ar_ccv; /* compare/exchange value (scratch) */
155 * Floating point registers that the kernel considers
158 struct ia64_fpreg f6; /* scratch */
159 struct ia64_fpreg f7; /* scratch */
160 struct ia64_fpreg f8; /* scratch */
161 struct ia64_fpreg f9; /* scratch */
162 struct ia64_fpreg f10; /* scratch */
163 struct ia64_fpreg f11; /* scratch */
167 * This structure contains the addition registers that need to
168 * preserved across a context switch. This generally consists of
169 * "preserved" registers.
171 struct switch_stack {
172 unsigned long caller_unat; /* user NaT collection register (preserved) */
173 unsigned long ar_fpsr; /* floating-point status register */
175 struct ia64_fpreg f2; /* preserved */
176 struct ia64_fpreg f3; /* preserved */
177 struct ia64_fpreg f4; /* preserved */
178 struct ia64_fpreg f5; /* preserved */
180 struct ia64_fpreg f12; /* scratch, but untouched by kernel */
181 struct ia64_fpreg f13; /* scratch, but untouched by kernel */
182 struct ia64_fpreg f14; /* scratch, but untouched by kernel */
183 struct ia64_fpreg f15; /* scratch, but untouched by kernel */
184 struct ia64_fpreg f16; /* preserved */
185 struct ia64_fpreg f17; /* preserved */
186 struct ia64_fpreg f18; /* preserved */
187 struct ia64_fpreg f19; /* preserved */
188 struct ia64_fpreg f20; /* preserved */
189 struct ia64_fpreg f21; /* preserved */
190 struct ia64_fpreg f22; /* preserved */
191 struct ia64_fpreg f23; /* preserved */
192 struct ia64_fpreg f24; /* preserved */
193 struct ia64_fpreg f25; /* preserved */
194 struct ia64_fpreg f26; /* preserved */
195 struct ia64_fpreg f27; /* preserved */
196 struct ia64_fpreg f28; /* preserved */
197 struct ia64_fpreg f29; /* preserved */
198 struct ia64_fpreg f30; /* preserved */
199 struct ia64_fpreg f31; /* preserved */
201 unsigned long r4; /* preserved */
202 unsigned long r5; /* preserved */
203 unsigned long r6; /* preserved */
204 unsigned long r7; /* preserved */
206 unsigned long b0; /* so we can force a direct return in copy_thread */
213 unsigned long ar_pfs; /* previous function state */
214 unsigned long ar_lc; /* loop counter (preserved) */
215 unsigned long ar_unat; /* NaT bits for r4-r7 */
216 unsigned long ar_rnat; /* RSE NaT collection register */
217 unsigned long ar_bspstore; /* RSE dirty base (preserved) */
218 unsigned long pr; /* 64 predicate registers (1 bit each) */
222 /* given a pointer to a task_struct, return the user's pt_regs */
223 # define ia64_task_regs(t) (((struct pt_regs *) ((char *) (t) + IA64_STK_OFFSET)) - 1)
224 # define ia64_psr(regs) ((struct ia64_psr *) &(regs)->cr_ipsr)
225 # define user_mode(regs) (((struct ia64_psr *) &(regs)->cr_ipsr)->cpl != 0)
227 struct task_struct; /* forward decl */
228 struct unw_frame_info; /* forward decl */
230 extern void show_regs (struct pt_regs *);
231 extern void ia64_do_show_stack (struct unw_frame_info *, void *);
232 extern unsigned long ia64_get_user_rbs_end (struct task_struct *, struct pt_regs *,
234 extern long ia64_peek (struct task_struct *, struct switch_stack *, unsigned long,
235 unsigned long, long *);
236 extern long ia64_poke (struct task_struct *, struct switch_stack *, unsigned long,
237 unsigned long, long);
238 extern void ia64_flush_fph (struct task_struct *);
239 extern void ia64_sync_fph (struct task_struct *);
240 extern long ia64_sync_user_rbs (struct task_struct *, struct switch_stack *,
241 unsigned long, unsigned long);
243 /* get nat bits for scratch registers such that bit N==1 iff scratch register rN is a NaT */
244 extern unsigned long ia64_get_scratch_nat_bits (struct pt_regs *pt, unsigned long scratch_unat);
245 /* put nat bits for scratch registers such that scratch register rN is a NaT iff bit N==1 */
246 extern unsigned long ia64_put_scratch_nat_bits (struct pt_regs *pt, unsigned long nat);
248 extern void ia64_increment_ip (struct pt_regs *pt);
249 extern void ia64_decrement_ip (struct pt_regs *pt);
251 #define force_successful_syscall_return() \
253 ia64_task_regs(current)->r8 = 0; \
256 #endif /* !__KERNEL__ */
258 /* pt_all_user_regs is used for PTRACE_GETREGS PTRACE_SETREGS */
259 struct pt_all_user_regs {
261 unsigned long cr_iip;
263 unsigned long cr_ipsr;
266 unsigned long gr[32];
268 unsigned long ar[128];
269 struct ia64_fpreg fr[128];
272 #endif /* !__ASSEMBLY__ */
274 /* indices to application-registers array in pt_all_user_regs */
275 #define PT_AUR_RSC 16
276 #define PT_AUR_BSP 17
277 #define PT_AUR_BSPSTORE 18
278 #define PT_AUR_RNAT 19
279 #define PT_AUR_CCV 32
280 #define PT_AUR_UNAT 36
281 #define PT_AUR_FPSR 40
282 #define PT_AUR_PFS 64
287 * The numbers chosen here are somewhat arbitrary but absolutely MUST
288 * not overlap with any of the number assigned in <linux/ptrace.h>.
290 #define PTRACE_SINGLEBLOCK 12 /* resume execution until next branch */
291 #define PTRACE_GETSIGINFO 13 /* get child's siginfo structure */
292 #define PTRACE_SETSIGINFO 14 /* set child's siginfo structure */
293 #define PTRACE_GETREGS 18 /* get all registers (pt_all_user_regs) in one shot */
294 #define PTRACE_SETREGS 19 /* set all registers (pt_all_user_regs) in one shot */
296 #endif /* _ASM_IA64_PTRACE_H */