#ifndef _ASM_IA64_PTRACE_H #define _ASM_IA64_PTRACE_H /* * Copyright (C) 1998, 1999 Hewlett-Packard Co * Copyright (C) 1998, 1999 David Mosberger-Tang * Copyright (C) 1998, 1999 Stephane Eranian * * 12/07/98 S. Eranian added pt_regs & switch_stack * 12/21/98 D. Mosberger updated to match latest code * 6/17/99 D. Mosberger added second unat member to "struct switch_stack" * */ /* * When a user process is blocked, its state looks as follows: * * +----------------------+ ------- IA64_STK_OFFSET * | | ^ * | struct pt_regs | | * | | | * +----------------------+ | * | | | * | memory stack | | * | (growing downwards) | | * //.....................// | * | * //.....................// | * | | | * +----------------------+ | * | struct switch_stack | | * | | | * +----------------------+ | * | | | * //.....................// | * | * //.....................// | * | | | * | register stack | | * | (growing upwards) | | * | | | * +----------------------+ | --- IA64_RBS_OFFSET * | | | ^ * | struct task_struct | | | * current -> | | | | * +----------------------+ ------- * * Note that ar.ec is not saved explicitly in pt_reg or switch_stack. * This is because ar.ec is saved as part of ar.pfs. */ #include #include #include /* * Base-2 logarithm of number of pages to allocate per task structure * (including register backing store and memory stack): */ #if defined(CONFIG_IA64_PAGE_SIZE_4KB) # define IA64_TASK_STRUCT_LOG_NUM_PAGES 3 #elif defined(CONFIG_IA64_PAGE_SIZE_8KB) # define IA64_TASK_STRUCT_LOG_NUM_PAGES 2 #elif defined(CONFIG_IA64_PAGE_SIZE_16KB) # define IA64_TASK_STRUCT_LOG_NUM_PAGES 1 #else # define IA64_TASK_STRUCT_LOG_NUM_PAGES 0 #endif #define IA64_RBS_OFFSET ((IA64_TASK_SIZE + 15) & ~15) #define IA64_STK_OFFSET ((1 << IA64_TASK_STRUCT_LOG_NUM_PAGES)*PAGE_SIZE) #define INIT_TASK_SIZE IA64_STK_OFFSET #ifndef __ASSEMBLY__ /* * This struct defines the way the registers are saved on system * calls. * * We don't save all floating point register because the kernel * is compiled to use only a very small subset, so the other are * untouched. * * THIS STRUCTURE MUST BE A MULTIPLE 16-BYTE IN SIZE * (because the memory stack pointer MUST ALWAYS be aligned this way) * */ struct pt_regs { /* The following registers are saved by SAVE_MIN: */ unsigned long cr_ipsr; /* interrupted task's psr */ unsigned long cr_iip; /* interrupted task's instruction pointer */ unsigned long cr_ifs; /* interrupted task's function state */ unsigned long ar_unat; /* interrupted task's NaT register (preserved) */ unsigned long ar_pfs; /* prev function state */ unsigned long ar_rsc; /* RSE configuration */ /* The following two are valid only if cr_ipsr.cpl > 0: */ unsigned long ar_rnat; /* RSE NaT */ unsigned long ar_bspstore; /* RSE bspstore */ unsigned long pr; /* 64 predicate registers (1 bit each) */ unsigned long b6; /* scratch */ unsigned long loadrs; /* size of dirty partition << 16 */ unsigned long r1; /* the gp pointer */ unsigned long r2; /* scratch */ unsigned long r3; /* scratch */ unsigned long r12; /* interrupted task's memory stack pointer */ unsigned long r13; /* thread pointer */ unsigned long r14; /* scratch */ unsigned long r15; /* scratch */ unsigned long r8; /* scratch (return value register 0) */ unsigned long r9; /* scratch (return value register 1) */ unsigned long r10; /* scratch (return value register 2) */ unsigned long r11; /* scratch (return value register 3) */ /* The following registers are saved by SAVE_REST: */ unsigned long r16; /* scratch */ unsigned long r17; /* scratch */ unsigned long r18; /* scratch */ unsigned long r19; /* scratch */ unsigned long r20; /* scratch */ unsigned long r21; /* scratch */ unsigned long r22; /* scratch */ unsigned long r23; /* scratch */ unsigned long r24; /* scratch */ unsigned long r25; /* scratch */ unsigned long r26; /* scratch */ unsigned long r27; /* scratch */ unsigned long r28; /* scratch */ unsigned long r29; /* scratch */ unsigned long r30; /* scratch */ unsigned long r31; /* scratch */ unsigned long ar_ccv; /* compare/exchange value */ unsigned long ar_fpsr; /* floating point status*/ unsigned long b0; /* return pointer (bp) */ unsigned long b7; /* scratch */ /* * Floating point registers that the kernel considers * scratch: */ struct ia64_fpreg f6; /* scratch */ struct ia64_fpreg f7; /* scratch */ struct ia64_fpreg f8; /* scratch */ struct ia64_fpreg f9; /* scratch */ }; /* * This structure contains the addition registers that need to * preserved across a context switch. This generally consists of * "preserved" registers. */ struct switch_stack { unsigned long caller_unat; /* user NaT collection register (preserved) */ unsigned long ar_fpsr; /* floating-point status register */ struct ia64_fpreg f2; /* preserved */ struct ia64_fpreg f3; /* preserved */ struct ia64_fpreg f4; /* preserved */ struct ia64_fpreg f5; /* preserved */ struct ia64_fpreg f10; /* scratch, but untouched by kernel */ struct ia64_fpreg f11; /* scratch, but untouched by kernel */ struct ia64_fpreg f12; /* scratch, but untouched by kernel */ struct ia64_fpreg f13; /* scratch, but untouched by kernel */ struct ia64_fpreg f14; /* scratch, but untouched by kernel */ struct ia64_fpreg f15; /* scratch, but untouched by kernel */ struct ia64_fpreg f16; /* preserved */ struct ia64_fpreg f17; /* preserved */ struct ia64_fpreg f18; /* preserved */ struct ia64_fpreg f19; /* preserved */ struct ia64_fpreg f20; /* preserved */ struct ia64_fpreg f21; /* preserved */ struct ia64_fpreg f22; /* preserved */ struct ia64_fpreg f23; /* preserved */ struct ia64_fpreg f24; /* preserved */ struct ia64_fpreg f25; /* preserved */ struct ia64_fpreg f26; /* preserved */ struct ia64_fpreg f27; /* preserved */ struct ia64_fpreg f28; /* preserved */ struct ia64_fpreg f29; /* preserved */ struct ia64_fpreg f30; /* preserved */ struct ia64_fpreg f31; /* preserved */ unsigned long r4; /* preserved */ unsigned long r5; /* preserved */ unsigned long r6; /* preserved */ unsigned long r7; /* preserved */ unsigned long b0; /* so we can force a direct return in copy_thread */ unsigned long b1; unsigned long b2; unsigned long b3; unsigned long b4; unsigned long b5; unsigned long ar_pfs; /* previous function state */ unsigned long ar_lc; /* loop counter (preserved) */ unsigned long ar_unat; /* NaT bits for r4-r7 */ unsigned long ar_rnat; /* RSE NaT collection register */ unsigned long ar_bspstore; /* RSE dirty base (preserved) */ unsigned long pr; /* 64 predicate registers (1 bit each) */ }; #ifdef __KERNEL__ /* given a pointer to a task_struct, return the user's pt_regs */ # define ia64_task_regs(t) (((struct pt_regs *) ((char *) (t) + IA64_STK_OFFSET)) - 1) # define ia64_psr(regs) ((struct ia64_psr *) &(regs)->cr_ipsr) # define user_mode(regs) (((struct ia64_psr *) &(regs)->cr_ipsr)->cpl != 0) struct task_struct; /* forward decl */ extern void show_regs (struct pt_regs *); extern long ia64_peek (struct pt_regs *, struct task_struct *, unsigned long addr, long *val); extern long ia64_poke (struct pt_regs *, struct task_struct *, unsigned long addr, long val); /* get nat bits for r1-r31 such that bit N==1 iff rN is a NaT */ extern long ia64_get_nat_bits (struct pt_regs *pt, struct switch_stack *sw); /* put nat bits for r1-r31 such that rN is a NaT iff bit N==1 */ extern void ia64_put_nat_bits (struct pt_regs *pt, struct switch_stack *sw, unsigned long nat); extern void ia64_increment_ip (struct pt_regs *pt); extern void ia64_decrement_ip (struct pt_regs *pt); #endif #endif /* !__ASSEMBLY__ */ /* * The numbers chosen here are somewhat arbitrary but absolutely MUST * not overlap with any of the number assigned in . */ #define PTRACE_SINGLEBLOCK 12 /* resume execution until next branch */ #define PTRACE_GETSIGINFO 13 /* get child's siginfo structure */ #define PTRACE_SETSIGINFO 14 /* set child's siginfo structure */ #endif /* _ASM_IA64_PTRACE_H */