stackframe.h revision 1.1.2.2
1 1.1.2.2 yamt /* $NetBSD: stackframe.h,v 1.1.2.2 2006/04/11 11:53:43 yamt Exp $ */ 2 1.1.2.2 yamt 3 1.1.2.2 yamt /* 4 1.1.2.2 yamt * Contributed to the NetBSD foundation by Cherry G. Mathew 5 1.1.2.2 yamt */ 6 1.1.2.2 yamt 7 1.1.2.2 yamt #define UNW_VER(x) ((x) >> 48) 8 1.1.2.2 yamt #define UNW_FLAG_MASK 0x0000ffff00000000L 9 1.1.2.2 yamt #define UNW_FLAG_OSMASK 0x0000f00000000000L 10 1.1.2.2 yamt #define UNW_FLAG_EHANDLER(x) ((x) & 0x0000000100000000L) 11 1.1.2.2 yamt #define UNW_FLAG_UHANDLER(x) ((x) & 0x0000000200000000L) 12 1.1.2.2 yamt #define UNW_LENGTH(x) ((x) & 0x00000000ffffffffL) 13 1.1.2.2 yamt 14 1.1.2.2 yamt /* Unwind table entry. */ 15 1.1.2.2 yamt struct uwtable_ent { 16 1.1.2.2 yamt uint64_t start; 17 1.1.2.2 yamt uint64_t end; 18 1.1.2.2 yamt char *infoptr; 19 1.1.2.2 yamt }; 20 1.1.2.2 yamt 21 1.1.2.2 yamt 22 1.1.2.2 yamt enum regrecord_type{ 23 1.1.2.2 yamt UNSAVED, /* Register contents live ( and therefore untouched ). */ 24 1.1.2.2 yamt IMMED, /* .offset field is the saved content. */ 25 1.1.2.2 yamt BRREL, /* Register saved in one of the Branch Registers. */ 26 1.1.2.2 yamt GRREL, /* Register saved in one of the Stacked GRs 27 1.1.2.2 yamt * regstate.offset contains GR number (usually >= 32) 28 1.1.2.2 yamt */ 29 1.1.2.2 yamt SPREL, /* Register saved on the memory stack frame. 30 1.1.2.2 yamt * regstate.offset is in words; ie; location == (sp + 4 * spoff). 31 1.1.2.2 yamt */ 32 1.1.2.2 yamt PSPREL /* Register saved on the memory stack frame but offseted via psp 33 1.1.2.2 yamt * regstate.offset is in words; ie; location == (psp + 16 4 * pspoff) 34 1.1.2.2 yamt */ 35 1.1.2.2 yamt }; 36 1.1.2.2 yamt 37 1.1.2.2 yamt 38 1.1.2.2 yamt struct regstate { 39 1.1.2.2 yamt enum regrecord_type where; 40 1.1.2.2 yamt uint64_t when; 41 1.1.2.2 yamt 42 1.1.2.2 yamt #define INVALID -1UL /* Indicates uninitialised offset value. */ 43 1.1.2.2 yamt uint64_t offset; 44 1.1.2.2 yamt }; 45 1.1.2.2 yamt 46 1.1.2.2 yamt 47 1.1.2.2 yamt /* A staterecord contains the net state of 48 1.1.2.2 yamt * sequentially parsing unwind descriptors. 49 1.1.2.2 yamt * The entry state of the current prologue region 50 1.1.2.2 yamt * is the exit state of the previous region. 51 1.1.2.2 yamt * We record info about registers we care about 52 1.1.2.2 yamt * ie; just enough to re-construct an unwind frame, 53 1.1.2.2 yamt * and ignore the rest. 54 1.1.2.2 yamt * Initial state is where = UNSAVED for all .where fields. 55 1.1.2.2 yamt */ 56 1.1.2.2 yamt 57 1.1.2.2 yamt struct staterecord { 58 1.1.2.2 yamt struct regstate bsp; 59 1.1.2.2 yamt struct regstate psp; 60 1.1.2.2 yamt struct regstate rp; 61 1.1.2.2 yamt struct regstate pfs; 62 1.1.2.2 yamt }; 63 1.1.2.2 yamt 64 1.1.2.2 yamt /* The unwind frame is a simpler version of the trap frame 65 1.1.2.2 yamt * and contains a subset of preserved registers, which are 66 1.1.2.2 yamt * usefull in unwinding an ia64 stack frame. 67 1.1.2.2 yamt * Keep this in sync with the staterecord. See: stackframe.c:updateregs() 68 1.1.2.2 yamt */ 69 1.1.2.2 yamt 70 1.1.2.2 yamt struct unwind_frame { 71 1.1.2.2 yamt uint64_t bsp; /* Base of the RSE. !!! XXX: Stack Frame discontinuities */ 72 1.1.2.2 yamt uint64_t psp; /* Mem stack (variable size) base. */ 73 1.1.2.2 yamt uint64_t rp; /* Return Pointer */ 74 1.1.2.2 yamt uint64_t pfs; /* Previous Frame size info */ 75 1.1.2.2 yamt 76 1.1.2.2 yamt /* Don't mirror anything below this line with struct staterecord */ 77 1.1.2.2 yamt uint64_t sp; 78 1.1.2.2 yamt }; 79 1.1.2.2 yamt 80 1.1.2.2 yamt 81 1.1.2.2 yamt void buildrecordchain(uint64_t, struct recordchain *); 82 1.1.2.2 yamt void initrecord(struct staterecord *); 83 1.1.2.2 yamt void modifyrecord(struct staterecord *, struct recordchain *, uint64_t); 84 1.1.2.2 yamt void pushrecord(struct staterecord *); 85 1.1.2.2 yamt void poprecord(struct staterecord *, int); 86 1.1.2.2 yamt void dump_staterecord(struct staterecord *); 87 1.1.2.2 yamt void clonerecordstack(u_int); 88 1.1.2.2 yamt void switchrecordstack(u_int); 89 1.1.2.2 yamt 90 1.1.2.2 yamt struct uwtable_ent * 91 1.1.2.2 yamt get_unwind_table_entry(uint64_t); 92 1.1.2.2 yamt void 93 1.1.2.2 yamt patchunwindframe(struct unwind_frame *, uint64_t, uint64_t); 94 1.1.2.2 yamt void 95 1.1.2.2 yamt updateregs(struct unwind_frame *uwf, struct staterecord *, uint64_t) ; 96 1.1.2.2 yamt struct uwtable_ent * get_unwind_table_entry(uint64_t ip); 97 1.1.2.2 yamt 98 1.1.2.2 yamt struct staterecord * 99 1.1.2.2 yamt buildrecordstack(struct recordchain *, uint64_t); 100 1.1.2.2 yamt void dump_recordchain(struct recordchain *); 101 1.1.2.2 yamt 102 1.1.2.2 yamt /* Convenience macros to decompose CFM & ar.pfs. */ 103 1.1.2.2 yamt #define IA64_CFM_SOF(x) ((x) & 0x7f) 104 1.1.2.2 yamt #define IA64_CFM_SOL(x) (((x) >> 7) & 0x7f) 105 1.1.2.2 yamt #define IA64_CFM_SOR(x) (((x) >> 14) & 0x0f) 106 1.1.2.2 yamt #define IA64_CFM_RRB_GR(x) (((x) >> 18) & 0x7f) 107 1.1.2.2 yamt #define IA64_CFM_RRB_FR(x) (((x) >> 25) & 0x7f) 108 1.1.2.2 yamt #define IA64_CFM_RRB_PR(x) (((x) >> 32) & 0x3f) 109 1.1.2.2 yamt 110 1.1.2.2 yamt #define IA64_RNATINDEX(x) (((x) & 0x1f8) >> 3) 111 1.1.2.2 yamt 112 1.1.2.2 yamt /* Obeys Table 6:2 RSE Operation Instructions and State Modification */ 113 1.1.2.2 yamt 114 1.1.2.2 yamt /* These functions adjust for RSE rnat saves to bsp in the forward and 115 1.1.2.2 yamt * reverse directions respectively. 116 1.1.2.2 yamt */ 117 1.1.2.2 yamt #define ia64_rnat_adjust ia64_bsp_adjust_call 118 1.1.2.2 yamt 119 1.1.2.2 yamt static __inline uint64_t 120 1.1.2.2 yamt ia64_bsp_adjust_call(uint64_t bsp, int sol) 121 1.1.2.2 yamt { 122 1.1.2.2 yamt bsp += ((sol + (IA64_RNATINDEX(bsp) + sol) / 63) << 3); 123 1.1.2.2 yamt return bsp; 124 1.1.2.2 yamt } 125 1.1.2.2 yamt 126 1.1.2.2 yamt static __inline uint64_t 127 1.1.2.2 yamt ia64_bsp_adjust_ret(uint64_t bsp, int sol) 128 1.1.2.2 yamt { 129 1.1.2.2 yamt bsp -= ((sol + (62 - IA64_RNATINDEX(bsp) + sol) / 63) << 3); 130 1.1.2.2 yamt return bsp; 131 1.1.2.2 yamt } 132 1.1.2.2 yamt 133 1.1.2.2 yamt static __inline uint64_t 134 1.1.2.2 yamt ia64_getrse_gr(uint64_t bsp, uint64_t gr) 135 1.1.2.2 yamt { 136 1.1.2.2 yamt bsp = ia64_bsp_adjust_call(bsp, gr); 137 1.1.2.2 yamt return *(uint64_t *) bsp; 138 1.1.2.2 yamt } 139
Indexes created Tue Sep 30 11:09:46 GMT 2025