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crash/unwind.h

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/*
* Copyright (C) 1999-2000 Hewlett-Packard Co
* Copyright (C) 1999-2000 David Mosberger-Tang <davidm@hpl.hp.com>
*/
/*
* Copyright (C) 1998, 1999 Hewlett-Packard Co
* Copyright (C) 1998, 1999 David Mosberger-Tang <davidm@hpl.hp.com>
*/
/*
* unwind.h
*
* Copyright (C) 2002, 2003, 2004, 2005 David Anderson
* Copyright (C) 2002, 2003, 2004, 2005 Red Hat, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* Adapted from:
*
* include/asm-ia64/fpu.h (kernel-2.4.18-6.23)
* include/asm-ia64/unwind.h (kernel-2.4.18-6.23)
*/
#ifndef _ASM_IA64_FPU_H
#define _ASM_IA64_FPU_H
struct ia64_fpreg {
union {
unsigned long bits[2];
} u;
} __attribute__ ((aligned (16)));
#endif /* _ASM_IA64_FPU_H */
#ifndef _ASM_IA64_UNWIND_H
#define _ASM_IA64_UNWIND_H
/*
* A simple API for unwinding kernel stacks. This is used for
* debugging and error reporting purposes. The kernel doesn't need
* full-blown stack unwinding with all the bells and whitles, so there
* is not much point in implementing the full IA-64 unwind API (though
* it would of course be possible to implement the kernel API on top
* of it).
*/
struct task_struct; /* forward declaration */
struct switch_stack; /* forward declaration */
enum unw_application_register {
UNW_AR_BSP,
UNW_AR_BSPSTORE,
UNW_AR_PFS,
UNW_AR_RNAT,
UNW_AR_UNAT,
UNW_AR_LC,
UNW_AR_EC,
UNW_AR_FPSR,
UNW_AR_RSC,
UNW_AR_CCV,
UNW_AR_CSD,
UNW_AR_SSD
};
/*
* The following declarations are private to the unwind
* implementation:
*/
struct unw_stack {
unsigned long limit;
unsigned long top;
};
#define UNW_FLAG_INTERRUPT_FRAME (1UL << 0)
/*
* No user of this module should every access this structure directly
* as it is subject to change. It is declared here solely so we can
* use automatic variables.
*/
struct unw_frame_info {
struct unw_stack regstk;
struct unw_stack memstk;
unsigned int flags;
short hint;
short prev_script;
/* current frame info: */
unsigned long bsp; /* backing store pointer value */
unsigned long sp; /* stack pointer value */
unsigned long psp; /* previous sp value */
unsigned long ip; /* instruction pointer value */
unsigned long pr; /* current predicate values */
unsigned long *cfm_loc; /* cfm save location (or NULL) */
#if defined(UNWIND_V2) || defined(UNWIND_V3)
unsigned long pt; /* struct pt_regs location */
#endif
struct task_struct *task;
struct switch_stack *sw;
/* preserved state: */
unsigned long *bsp_loc; /* previous bsp save location */
unsigned long *bspstore_loc;
unsigned long *pfs_loc;
unsigned long *rnat_loc;
unsigned long *rp_loc;
unsigned long *pri_unat_loc;
unsigned long *unat_loc;
unsigned long *pr_loc;
unsigned long *lc_loc;
unsigned long *fpsr_loc;
struct unw_ireg {
unsigned long *loc;
struct unw_ireg_nat {
long type : 3; /* enum unw_nat_type */
signed long off : 61; /* NaT word is at loc+nat.off */
} nat;
} r4, r5, r6, r7;
unsigned long *b1_loc, *b2_loc, *b3_loc, *b4_loc, *b5_loc;
struct ia64_fpreg *f2_loc, *f3_loc, *f4_loc, *f5_loc, *fr_loc[16];
};
/*
* The official API follows below:
*/
/*
* Initialize unwind support.
*/
extern void unw_init (void);
extern void unw_create_gate_table (void);
extern void *unw_add_unwind_table (const char *name, unsigned long segment_base, unsigned long gp,
const void *table_start, const void *table_end);
extern void unw_remove_unwind_table (void *handle);
/*
* Prepare to unwind blocked task t.
*/
#ifndef REDHAT
extern void unw_init_from_blocked_task (struct unw_frame_info *info, struct task_struct *t);
extern void unw_init_frame_info (struct unw_frame_info *info, struct task_struct *t,
struct switch_stack *sw);
#endif /* !REDHAT */
/*
* Prepare to unwind the currently running thread.
*/
extern void unw_init_running (void (*callback)(struct unw_frame_info *info, void *arg), void *arg);
/*
* Unwind to previous to frame. Returns 0 if successful, negative
* number in case of an error.
*/
#ifndef REDHAT
extern int unw_unwind (struct unw_frame_info *info);
#endif /* !REDHAT */
/*
* Unwind until the return pointer is in user-land (or until an error
* occurs). Returns 0 if successful, negative number in case of
* error.
*/
extern int unw_unwind_to_user (struct unw_frame_info *info);
#define unw_is_intr_frame(info) (((info)->flags & UNW_FLAG_INTERRUPT_FRAME) != 0)
static inline int
unw_get_ip (struct unw_frame_info *info, unsigned long *valp)
{
*valp = (info)->ip;
return 0;
}
static inline int
unw_get_sp (struct unw_frame_info *info, unsigned long *valp)
{
*valp = (info)->sp;
return 0;
}
static inline int
unw_get_psp (struct unw_frame_info *info, unsigned long *valp)
{
*valp = (info)->psp;
return 0;
}
static inline int
unw_get_bsp (struct unw_frame_info *info, unsigned long *valp)
{
*valp = (info)->bsp;
return 0;
}
static inline int
unw_get_cfm (struct unw_frame_info *info, unsigned long *valp)
{
*valp = *(info)->cfm_loc;
return 0;
}
static inline int
unw_set_cfm (struct unw_frame_info *info, unsigned long val)
{
*(info)->cfm_loc = val;
return 0;
}
static inline int
unw_get_rp (struct unw_frame_info *info, unsigned long *val)
{
if (!info->rp_loc)
return -1;
*val = *info->rp_loc;
return 0;
}
#ifdef UNWIND_V1
extern int unw_access_gr_v1 (struct unw_frame_info *, int, unsigned long *, char *, int);
extern int unw_access_br_v1 (struct unw_frame_info *, int, unsigned long *, int);
extern int unw_access_fr_v1 (struct unw_frame_info *, int, struct ia64_fpreg *, int);
extern int unw_access_ar_v1 (struct unw_frame_info *, int, unsigned long *, int);
extern int unw_access_pr_v1 (struct unw_frame_info *, unsigned long *, int);
#define unw_access_gr unw_access_gr_v1
#define unw_access_br unw_access_br_v1
#define unw_access_fr unw_access_fr_v1
#define unw_access_ar unw_access_ar_v1
#define unw_access_pr unw_access_pr_v1
#endif
#ifdef UNWIND_V2
extern int unw_access_gr_v2 (struct unw_frame_info *, int, unsigned long *, char *, int);
extern int unw_access_br_v2 (struct unw_frame_info *, int, unsigned long *, int);
extern int unw_access_fr_v2 (struct unw_frame_info *, int, struct ia64_fpreg *, int);
extern int unw_access_ar_v2 (struct unw_frame_info *, int, unsigned long *, int);
extern int unw_access_pr_v2 (struct unw_frame_info *, unsigned long *, int);
#define unw_access_gr unw_access_gr_v2
#define unw_access_br unw_access_br_v2
#define unw_access_fr unw_access_fr_v2
#define unw_access_ar unw_access_ar_v2
#define unw_access_pr unw_access_pr_v2
#endif
#ifdef UNWIND_V3
extern int unw_access_gr_v3 (struct unw_frame_info *, int, unsigned long *, char *, int);
extern int unw_access_br_v3 (struct unw_frame_info *, int, unsigned long *, int);
extern int unw_access_fr_v3 (struct unw_frame_info *, int, struct ia64_fpreg *, int);
extern int unw_access_ar_v3 (struct unw_frame_info *, int, unsigned long *, int);
extern int unw_access_pr_v3 (struct unw_frame_info *, unsigned long *, int);
#define unw_access_gr unw_access_gr_v3
#define unw_access_br unw_access_br_v3
#define unw_access_fr unw_access_fr_v3
#define unw_access_ar unw_access_ar_v3
#define unw_access_pr unw_access_pr_v3
#endif
static inline int
unw_set_gr (struct unw_frame_info *i, int n, unsigned long v, char nat)
{
return unw_access_gr(i, n, &v, &nat, 1);
}
static inline int
unw_set_br (struct unw_frame_info *i, int n, unsigned long v)
{
return unw_access_br(i, n, &v, 1);
}
static inline int
unw_set_fr (struct unw_frame_info *i, int n, struct ia64_fpreg v)
{
return unw_access_fr(i, n, &v, 1);
}
static inline int
unw_set_ar (struct unw_frame_info *i, int n, unsigned long v)
{
return unw_access_ar(i, n, &v, 1);
}
static inline int
unw_set_pr (struct unw_frame_info *i, unsigned long v)
{
return unw_access_pr(i, &v, 1);
}
#define unw_get_gr(i,n,v,nat) unw_access_gr(i,n,v,nat,0)
#define unw_get_br(i,n,v) unw_access_br(i,n,v,0)
#define unw_get_fr(i,n,v) unw_access_fr(i,n,v,0)
#define unw_get_ar(i,n,v) unw_access_ar(i,n,v,0)
#define unw_get_pr(i,v) unw_access_pr(i,v,0)
#ifdef UNWIND_V1
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) */
};
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 (scratch) */
unsigned long ar_fpsr; /* floating point status (preserved) */
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 */
};
#endif /* UNWIND_V1 */
#ifdef UNWIND_V2
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) */
};
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 (scratch) */
unsigned long ar_fpsr; /* floating point status (preserved) */
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 */
};
#endif /* UNWIND_V2 */
#ifdef UNWIND_V3
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 */
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 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) */
};
#endif /* UNWIND_V3 */
#endif /* _ASM_UNWIND_H */
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