2002-02-16 00:22:05 +01:00
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/* libunwind - a platform-independent unwind library
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Copyright (C) 2001-2002 Hewlett-Packard Co
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Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
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This file is part of libunwind.
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libunwind is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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libunwind is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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As a special exception, if you link this library with other files to
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produce an executable, this library does not by itself cause the
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resulting executable to be covered by the GNU General Public License.
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This exception does not however invalidate any other reasons why the
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executable file might be covered by the GNU General Public
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License. */
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#define IA64_LOG_UNW_CACHE_SIZE 7
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#define IA64_UNW_CACHE_SIZE (1 << IA64_LOG_UNW_CACHE_SIZE)
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#define IA64_LOG_UNW_HASH_SIZE (IA64_LOG_UNW_CACHE_SIZE + 1)
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#define IA64_UNW_HASH_SIZE (1 << IA64_LOG_UNW_HASH_SIZE)
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typedef unsigned char unw_hash_index_t;
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enum ia64_script_insn_opcode
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{
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IA64_INSN_SET, /* s[dst] = val */
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IA64_INSN_ADD, /* s[dst] += val */
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IA64_INSN_ADD_PSP, /* s[dst] = (s.psp + val) */
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IA64_INSN_ADD_SP, /* s[dst] = (s.sp + val) */
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IA64_INSN_MOVE, /* s[dst] = s[val] */
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IA64_INSN_MOVE_STACKED, /* s[dst] = ia64_rse_skip(*s.bsp_loc, val) */
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IA64_INSN_MOVE_SIGCONTEXT, /* s[dst] = sigcontext + val */
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IA64_INSN_SETNAT_MEMSTK, /* s[dst].nat.type = s.pri_unat_loc | MEMSTK */
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IA64_INSN_LOAD /* s[dst] = *s[val] */
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};
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struct ia64_script_insn
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{
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unsigned int opc;
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unsigned int dst;
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unw_word_t val;
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};
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/* Preserved general static registers (r4-r7) give rise to two script
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instructions; everything else yields at most one instruction; at
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the end of the script, the psp gets popped, accounting for one more
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instruction. */
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#define IA64_MAX_SCRIPT_LEN (IA64_NUM_PREGS + 5)
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struct ia64_script
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{
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unw_word_t ip; /* ip this script is for */
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unw_word_t pr_mask; /* mask of predicates script depends on */
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unw_word_t pr_val; /* predicate values this script is for */
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struct ia64_proc_info pi; /* info about underlying procedure */
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unsigned short lru_chain; /* used for least-recently-used chain */
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unsigned short coll_chain; /* used for hash collisions */
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unsigned short hint; /* hint for next script to try (or -1) */
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unsigned short count; /* number of instructions in script */
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struct ia64_script_insn insn[IA64_MAX_SCRIPT_LEN];
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};
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#define ia64_script_lookup UNW_OBJ(ia64_script_lookup)
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extern struct ia64_script *ia64_script_lookup (struct ia64_cursor *c);
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