340 lines
12 KiB
C
340 lines
12 KiB
C
#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>
|
|
#ifndef ASM_OFFSETS_C
|
|
#include <asm/asm-offsets.h>
|
|
#endif
|
|
|
|
/*
|
|
* 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 || ti->flags & _TIF_MCA_INIT */
|
|
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 */
|