1 #ifndef _ASM_IA64_PTRACE_H 2 #define _ASM_IA64_PTRACE_H 3 4 /* 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> 9 * 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" 13 * 14 */ 15 /* 16 * When a user process is blocked, its state looks as follows: 17 * 18 * +----------------------+ ------- IA64_STK_OFFSET 19 * | | ^ 20 * | struct pt_regs | | 21 * | | | 22 * +----------------------+ | 23 * | | | 24 * | memory stack | | 25 * | (growing downwards) | | 26 * //.....................// | 27 * | 28 * //.....................// | 29 * | | | 30 * +----------------------+ | 31 * | struct switch_stack | | 32 * | | | 33 * +----------------------+ | 34 * | | | 35 * //.....................// | 36 * | 37 * //.....................// | 38 * | | | 39 * | register stack | | 40 * | (growing upwards) | | 41 * | | | 42 * +----------------------+ | --- IA64_RBS_OFFSET 43 * | | | ^ 44 * | struct task_struct | | | 45 * current -> | | | | 46 * +----------------------+ ------- 47 * 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. 50 */ 51 52 #include <linux/config.h> 53 54 #include <asm/fpu.h> 55 #include <asm/offsets.h> 56 57 /* 58 * Base-2 logarithm of number of pages to allocate per task structure 59 * (including register backing store and memory stack): 60 */ 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 67 #else 68 # define IA64_TASK_STRUCT_LOG_NUM_PAGES 0 69 #endif 70 71 #define IA64_RBS_OFFSET ((IA64_TASK_SIZE + 15) & ~15) 72 #define IA64_STK_OFFSET ((1 << IA64_TASK_STRUCT_LOG_NUM_PAGES)*PAGE_SIZE) 73 74 #define INIT_TASK_SIZE IA64_STK_OFFSET 75 76 #ifndef __ASSEMBLY__ 77 78 #include <asm/current.h> 79 #include <asm/page.h> 80 81 /* 82 * This struct defines the way the registers are saved on system 83 * calls. 84 * 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 87 * untouched. 88 * 89 * THIS STRUCTURE MUST BE A MULTIPLE 16-BYTE IN SIZE 90 * (because the memory stack pointer MUST ALWAYS be aligned this way) 91 * 92 */ 93 struct pt_regs { 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. 97 */ 98 unsigned long b6; /* scratch */ 99 unsigned long b7; /* scratch */ 100 101 unsigned long ar_csd; /* used by cmp8xchg16 (scratch) */ 102 unsigned long ar_ssd; /* reserved for future use (scratch) */ 103 104 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) */ 108 109 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 */ 112 113 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 */ 119 120 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 */ 123 124 unsigned long r1; /* the gp pointer */ 125 unsigned long r12; /* interrupted task's memory stack pointer */ 126 unsigned long r13; /* thread pointer */ 127 128 unsigned long ar_fpsr; /* floating point status (preserved) */ 129 unsigned long r15; /* scratch */ 130 131 unsigned long r14; /* scratch */ 132 unsigned long r2; /* scratch */ 133 unsigned long r3; /* scratch */ 134 135 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 */ 151 152 unsigned long ar_ccv; /* compare/exchange value (scratch) */ 153 154 /* 155 * Floating point registers that the kernel considers 156 * scratch: 157 */ 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 */ 164 }; 165 166 /* 167 * This structure contains the addition registers that need to 168 * preserved across a context switch. This generally consists of 169 * "preserved" registers. 170 */ 171 struct switch_stack { 172 unsigned long caller_unat; /* user NaT collection register (preserved) */ 173 unsigned long ar_fpsr; /* floating-point status register */ 174 175 struct ia64_fpreg f2; /* preserved */ 176 struct ia64_fpreg f3; /* preserved */ 177 struct ia64_fpreg f4; /* preserved */ 178 struct ia64_fpreg f5; /* preserved */ 179 180 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 */ 200 201 unsigned long r4; /* preserved */ 202 unsigned long r5; /* preserved */ 203 unsigned long r6; /* preserved */ 204 unsigned long r7; /* preserved */ 205 206 unsigned long b0; /* so we can force a direct return in copy_thread */ 207 unsigned long b1; 208 unsigned long b2; 209 unsigned long b3; 210 unsigned long b4; 211 unsigned long b5; 212 213 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) */ 219 }; 220 221 #ifdef __KERNEL__ 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) 226 227 struct task_struct; /* forward decl */ 228 struct unw_frame_info; /* forward decl */ 229 230 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 *, 233 unsigned long *); 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); 242 243 /* 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); 247 248 extern void ia64_increment_ip (struct pt_regs *pt); 249 extern void ia64_decrement_ip (struct pt_regs *pt); 250 251 #define force_successful_syscall_return() \ 252 do { \ 253 ia64_task_regs(current)->r8 = 0; \ 254 } while (0) 255 256 #endif /* !__KERNEL__ */ 257 258 /* pt_all_user_regs is used for PTRACE_GETREGS PTRACE_SETREGS */ 259 struct pt_all_user_regs { 260 unsigned long nat; 261 unsigned long cr_iip; 262 unsigned long cfm; 263 unsigned long cr_ipsr; 264 unsigned long pr; 265 266 unsigned long gr[32]; 267 unsigned long br[8]; 268 unsigned long ar[128]; 269 struct ia64_fpreg fr[128]; 270 }; 271 272 #endif /* !__ASSEMBLY__ */ 273 274 /* 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 64 283 #define PT_AUR_LC 65 284 #define PT_AUR_EC 66 285 286 /* 287 * The numbers chosen here are somewhat arbitrary but absolutely MUST 288 * not overlap with any of the number assigned in <linux/ptrace.h>. 289 */ 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 */ 295 296 #endif /* _ASM_IA64_PTRACE_H */ 297