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98 lines
3.7 KiB
C
98 lines
3.7 KiB
C
/* 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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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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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_SET_REG, /* s[dst] = REG(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_SCRATCH, /* s[dst] = scratch reg "val" */
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IA64_INSN_SETNAT_MEMSTK, /* s[dst].nat.type = s.pri_unat_loc | MEMSTK */
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IA64_INSN_INC_PSP, /* psp += val */
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IA64_INSN_LOAD_PSP /* psp = *psp_loc */
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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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unw_proc_info_t 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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unsigned short abi_marker;
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struct ia64_script_insn insn[IA64_MAX_SCRIPT_LEN];
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};
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struct ia64_script_cache
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{
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#ifdef HAVE_ATOMIC_OPS_H
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AO_TS_t busy; /* is the script-cache busy? */
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#else
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pthread_mutex_t lock;
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#endif
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unsigned short lru_head; /* index of lead-recently used script */
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unsigned short lru_tail; /* index of most-recently used script */
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/* hash table that maps instruction pointer to script index: */
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unsigned short hash[IA64_UNW_HASH_SIZE];
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uint32_t generation; /* generation number */
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/* script cache: */
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struct ia64_script buckets[IA64_UNW_CACHE_SIZE];
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};
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#define ia64_get_cached_proc_info UNW_OBJ(ia64_get_cached_proc_info)
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struct cursor; /* forward declaration */
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extern int ia64_get_cached_proc_info (struct cursor *c);
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