| #ifndef _ASM_IA64_PTRACE_H |
| #define _ASM_IA64_PTRACE_H |
| |
| /* |
| * Copyright (C) 1998-2004 Hewlett-Packard Co |
| * David Mosberger-Tang <davidm@hpl.hp.com> |
| * Stephane Eranian <eranian@hpl.hp.com> |
| * Copyright (C) 2003 Intel Co |
| * Suresh Siddha <suresh.b.siddha@intel.com> |
| * Fenghua Yu <fenghua.yu@intel.com> |
| * Arun Sharma <arun.sharma@intel.com> |
| * |
| * 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 thread_info | | ^ |
| * +----------------------+ | | |
| * | | | | |
| * | 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 <linux/config.h> |
| |
| #include <asm/fpu.h> |
| #include <asm/offsets.h> |
| |
| /* |
| * 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 KERNEL_STACK_SIZE_ORDER 3 |
| #elif defined(CONFIG_IA64_PAGE_SIZE_8KB) |
| # define KERNEL_STACK_SIZE_ORDER 2 |
| #elif defined(CONFIG_IA64_PAGE_SIZE_16KB) |
| # define KERNEL_STACK_SIZE_ORDER 1 |
| #else |
| # define KERNEL_STACK_SIZE_ORDER 0 |
| #endif |
| |
| #define IA64_RBS_OFFSET ((IA64_TASK_SIZE + IA64_THREAD_INFO_SIZE + 15) & ~15) |
| #define IA64_STK_OFFSET ((1 << KERNEL_STACK_SIZE_ORDER)*PAGE_SIZE) |
| |
| #define KERNEL_STACK_SIZE IA64_STK_OFFSET |
| |
| #ifndef __ASSEMBLY__ |
| |
| #include <asm/current.h> |
| #include <asm/page.h> |
| |
| /* |
| * 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 b6; /* scratch */ |
| unsigned long b7; /* scratch */ |
| |
| unsigned long ar_csd; /* used by cmp8xchg16 (scratch) */ |
| unsigned long ar_ssd; /* reserved for future use (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) */ |
| |
| unsigned long cr_ipsr; /* interrupted task's psr */ |
| unsigned long cr_iip; /* interrupted task's instruction pointer */ |
| /* |
| * interrupted task's function state; if bit 63 is cleared, it |
| * contains syscall's ar.pfs.pfm: |
| */ |
| unsigned long cr_ifs; |
| |
| 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 b0; /* return pointer (bp) */ |
| unsigned long loadrs; /* size of dirty partition << 16 */ |
| |
| unsigned long r1; /* the gp pointer */ |
| unsigned long r12; /* interrupted task's memory stack pointer */ |
| unsigned long r13; /* thread pointer */ |
| |
| unsigned long ar_fpsr; /* floating point status (preserved) */ |
| unsigned long r15; /* scratch */ |
| |
| /* The remaining registers are NOT saved for system calls. */ |
| |
| unsigned long r14; /* scratch */ |
| unsigned long r2; /* scratch */ |
| unsigned long r3; /* scratch */ |
| |
| /* 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 (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 */ |
| struct ia64_fpreg f10; /* scratch */ |
| struct ia64_fpreg f11; /* 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 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__ |
| /* |
| * We use the ia64_psr(regs)->ri to determine which of the three |
| * instructions in bundle (16 bytes) took the sample. Generate |
| * the canonical representation by adding to instruction pointer. |
| */ |
| # define instruction_pointer(regs) ((regs)->cr_iip + ia64_psr(regs)->ri) |
| /* Conserve space in histogram by encoding slot bits in address |
| * bits 2 and 3 rather than bits 0 and 1. |
| */ |
| #define profile_pc(regs) \ |
| ({ \ |
| unsigned long __ip = instruction_pointer(regs); \ |
| (__ip & ~3UL) + ((__ip & 3UL) << 2); \ |
| }) |
| |
| /* 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) |
| # define user_stack(task,regs) ((long) regs - (long) task == IA64_STK_OFFSET - sizeof(*regs)) |
| # define fsys_mode(task,regs) \ |
| ({ \ |
| struct task_struct *_task = (task); \ |
| struct pt_regs *_regs = (regs); \ |
| !user_mode(_regs) && user_stack(_task, _regs); \ |
| }) |
| |
| /* |
| * System call handlers that, upon successful completion, need to return a negative value |
| * should call force_successful_syscall_return() right before returning. On architectures |
| * where the syscall convention provides for a separate error flag (e.g., alpha, ia64, |
| * ppc{,64}, sparc{,64}, possibly others), this macro can be used to ensure that the error |
| * flag will not get set. On architectures which do not support a separate error flag, |
| * the macro is a no-op and the spurious error condition needs to be filtered out by some |
| * other means (e.g., in user-level, by passing an extra argument to the syscall handler, |
| * or something along those lines). |
| * |
| * On ia64, we can clear the user's pt_regs->r8 to force a successful syscall. |
| */ |
| # define force_successful_syscall_return() (ia64_task_regs(current)->r8 = 0) |
| |
| struct task_struct; /* forward decl */ |
| struct unw_frame_info; /* forward decl */ |
| |
| extern void show_regs (struct pt_regs *); |
| extern void ia64_do_show_stack (struct unw_frame_info *, void *); |
| extern unsigned long ia64_get_user_rbs_end (struct task_struct *, struct pt_regs *, |
| unsigned long *); |
| extern long ia64_peek (struct task_struct *, struct switch_stack *, unsigned long, |
| unsigned long, long *); |
| extern long ia64_poke (struct task_struct *, struct switch_stack *, unsigned long, |
| unsigned long, long); |
| extern void ia64_flush_fph (struct task_struct *); |
| extern void ia64_sync_fph (struct task_struct *); |
| extern long ia64_sync_user_rbs (struct task_struct *, struct switch_stack *, |
| unsigned long, unsigned long); |
| |
| /* get nat bits for scratch registers such that bit N==1 iff scratch register rN is a NaT */ |
| extern unsigned long ia64_get_scratch_nat_bits (struct pt_regs *pt, unsigned long scratch_unat); |
| /* put nat bits for scratch registers such that scratch register rN is a NaT iff bit N==1 */ |
| extern unsigned long ia64_put_scratch_nat_bits (struct pt_regs *pt, unsigned long nat); |
| |
| extern void ia64_increment_ip (struct pt_regs *pt); |
| extern void ia64_decrement_ip (struct pt_regs *pt); |
| |
| #endif /* !__KERNEL__ */ |
| |
| /* pt_all_user_regs is used for PTRACE_GETREGS PTRACE_SETREGS */ |
| struct pt_all_user_regs { |
| unsigned long nat; |
| unsigned long cr_iip; |
| unsigned long cfm; |
| unsigned long cr_ipsr; |
| unsigned long pr; |
| |
| unsigned long gr[32]; |
| unsigned long br[8]; |
| unsigned long ar[128]; |
| struct ia64_fpreg fr[128]; |
| }; |
| |
| #endif /* !__ASSEMBLY__ */ |
| |
| /* indices to application-registers array in pt_all_user_regs */ |
| #define PT_AUR_RSC 16 |
| #define PT_AUR_BSP 17 |
| #define PT_AUR_BSPSTORE 18 |
| #define PT_AUR_RNAT 19 |
| #define PT_AUR_CCV 32 |
| #define PT_AUR_UNAT 36 |
| #define PT_AUR_FPSR 40 |
| #define PT_AUR_PFS 64 |
| #define PT_AUR_LC 65 |
| #define PT_AUR_EC 66 |
| |
| /* |
| * The numbers chosen here are somewhat arbitrary but absolutely MUST |
| * not overlap with any of the number assigned in <linux/ptrace.h>. |
| */ |
| #define PTRACE_SINGLEBLOCK 12 /* resume execution until next branch */ |
| #define PTRACE_OLD_GETSIGINFO 13 /* (replaced by PTRACE_GETSIGINFO in <linux/ptrace.h>) */ |
| #define PTRACE_OLD_SETSIGINFO 14 /* (replaced by PTRACE_SETSIGINFO in <linux/ptrace.h>) */ |
| #define PTRACE_GETREGS 18 /* get all registers (pt_all_user_regs) in one shot */ |
| #define PTRACE_SETREGS 19 /* set all registers (pt_all_user_regs) in one shot */ |
| |
| #define PTRACE_OLDSETOPTIONS 21 |
| |
| #endif /* _ASM_IA64_PTRACE_H */ |