/* * Copyright (C) 1999-2000 Hewlett-Packard Co * Copyright (C) 1999-2000 David Mosberger-Tang */ /* * Copyright (C) 1998, 1999 Hewlett-Packard Co * Copyright (C) 1998, 1999 David Mosberger-Tang */ /* * 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 */