280 lines
11 KiB
C
280 lines
11 KiB
C
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/* libunwind - a platform-independent unwind library
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Copyright (C) 2001-2005 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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#ifndef IA64_LIBUNWIND_I_H
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#define IA64_LIBUNWIND_I_H
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/* Target-dependent definitions that are internal to libunwind but need
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to be shared with target-independent code. */
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#include "elf64.h"
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#include "mempool.h"
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typedef struct
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{
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/* no ia64-specific fast trace */
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}
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unw_tdep_frame_t;
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enum ia64_pregnum
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{
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/* primary unat: */
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IA64_REG_PRI_UNAT_GR,
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IA64_REG_PRI_UNAT_MEM,
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/* memory stack (order matters: see build_script() */
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IA64_REG_PSP, /* previous memory stack pointer */
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/* register stack */
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IA64_REG_BSP, /* register stack pointer */
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IA64_REG_BSPSTORE,
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IA64_REG_PFS, /* previous function state */
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IA64_REG_RNAT,
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/* instruction pointer: */
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IA64_REG_IP,
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/* preserved registers: */
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IA64_REG_R4, IA64_REG_R5, IA64_REG_R6, IA64_REG_R7,
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IA64_REG_NAT4, IA64_REG_NAT5, IA64_REG_NAT6, IA64_REG_NAT7,
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IA64_REG_UNAT, IA64_REG_PR, IA64_REG_LC, IA64_REG_FPSR,
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IA64_REG_B1, IA64_REG_B2, IA64_REG_B3, IA64_REG_B4, IA64_REG_B5,
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IA64_REG_F2, IA64_REG_F3, IA64_REG_F4, IA64_REG_F5,
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IA64_REG_F16, IA64_REG_F17, IA64_REG_F18, IA64_REG_F19,
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IA64_REG_F20, IA64_REG_F21, IA64_REG_F22, IA64_REG_F23,
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IA64_REG_F24, IA64_REG_F25, IA64_REG_F26, IA64_REG_F27,
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IA64_REG_F28, IA64_REG_F29, IA64_REG_F30, IA64_REG_F31,
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IA64_NUM_PREGS
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};
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#ifdef UNW_LOCAL_ONLY
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typedef unw_word_t ia64_loc_t;
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#else /* !UNW_LOCAL_ONLY */
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typedef struct ia64_loc
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{
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unw_word_t w0, w1;
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}
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ia64_loc_t;
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#endif /* !UNW_LOCAL_ONLY */
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#include "script.h"
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#define ABI_UNKNOWN 0
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#define ABI_LINUX 1
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#define ABI_HPUX 2
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#define ABI_FREEBSD 3
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#define ABI_OPENVMS 4
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#define ABI_NSK 5 /* Tandem/HP Non-Stop Kernel */
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#define ABI_WINDOWS 6
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struct unw_addr_space
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{
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struct unw_accessors acc;
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int big_endian;
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int abi; /* abi < 0 => unknown, 0 => SysV, 1 => HP-UX, 2 => Windows */
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unw_caching_policy_t caching_policy;
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#ifdef HAVE_ATOMIC_OPS_H
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AO_t cache_generation;
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#else
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uint32_t cache_generation;
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#endif
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unw_word_t dyn_generation;
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unw_word_t dyn_info_list_addr; /* (cached) dyn_info_list_addr */
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#ifndef UNW_REMOTE_ONLY
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unsigned long long shared_object_removals;
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#endif
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struct ia64_script_cache global_cache;
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};
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/* Note: The ABI numbers in the ABI-markers (.unwabi directive) are
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not the same as the above ABI numbers. */
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#define ABI_MARKER_OLD_LINUX_SIGTRAMP ((0 << 8) | 's')
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#define ABI_MARKER_OLD_LINUX_INTERRUPT ((0 << 8) | 'i')
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#define ABI_MARKER_HP_UX_SIGTRAMP ((1 << 8) | 1)
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#define ABI_MARKER_LINUX_SIGTRAMP ((3 << 8) | 's')
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#define ABI_MARKER_LINUX_INTERRUPT ((3 << 8) | 'i')
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struct cursor
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{
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void *as_arg; /* argument to address-space callbacks */
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unw_addr_space_t as; /* reference to per-address-space info */
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/* IP, CFM, and predicate cache (these are always equal to the
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values stored in ip_loc, cfm_loc, and pr_loc,
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respectively). */
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unw_word_t ip; /* instruction pointer value */
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unw_word_t cfm; /* current frame mask */
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unw_word_t pr; /* current predicate values */
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/* current frame info: */
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unw_word_t bsp; /* backing store pointer value */
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unw_word_t sp; /* stack pointer value */
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unw_word_t psp; /* previous sp value */
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ia64_loc_t cfm_loc; /* cfm save location (or NULL) */
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ia64_loc_t ec_loc; /* ar.ec save location (usually cfm_loc) */
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ia64_loc_t loc[IA64_NUM_PREGS];
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unw_word_t eh_args[4]; /* exception handler arguments */
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unw_word_t sigcontext_addr; /* address of sigcontext or 0 */
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unw_word_t sigcontext_off; /* sigcontext-offset relative to signal sp */
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short hint;
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short prev_script;
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uint8_t nat_bitnr[4]; /* NaT bit numbers for r4-r7 */
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uint16_t abi_marker; /* abi_marker for current frame (if any) */
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uint16_t last_abi_marker; /* last abi_marker encountered so far */
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uint8_t eh_valid_mask;
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unsigned int pi_valid :1; /* is proc_info valid? */
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unsigned int pi_is_dynamic :1; /* proc_info found via dynamic proc info? */
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unw_proc_info_t pi; /* info about current procedure */
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/* In case of stack-discontiguities, such as those introduced by
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signal-delivery on an alternate signal-stack (see
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sigaltstack(2)), we use the following data-structure to keep
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track of the register-backing-store areas across on which the
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current frame may be backed up. Since there are at most 96
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stacked registers and since we only have to track the current
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frame and only areas that are not empty, this puts an upper
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limit on the # of backing-store areas we have to track.
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Note that the rbs-area indexed by rbs_curr identifies the
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rbs-area that was in effect at the time AR.BSP had the value
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c->bsp. However, this rbs area may not actually contain the
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value in the register that c->bsp corresponds to because that
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register may not have gotten spilled until much later, when a
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possibly different rbs-area might have been in effect
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already. */
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uint8_t rbs_curr; /* index of curr. rbs-area (contains c->bsp) */
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uint8_t rbs_left_edge; /* index of inner-most valid rbs-area */
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struct rbs_area
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{
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unw_word_t end;
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unw_word_t size;
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ia64_loc_t rnat_loc;
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}
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rbs_area[96 + 2]; /* 96 stacked regs + 1 extra stack on each side... */
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};
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struct ia64_global_unwind_state
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{
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pthread_mutex_t lock; /* global data lock */
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volatile char init_done;
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/* Table of registers that prologues can save (and order in which
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they're saved). */
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const unsigned char save_order[8];
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/*
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* uc_addr() may return pointers to these variables. We need to
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* make sure they don't get written via ia64_put() or
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* ia64_putfp(). To make it possible to test for these variables
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* quickly, we collect them in a single sub-structure.
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*/
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struct
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{
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unw_word_t r0; /* r0 is byte-order neutral */
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unw_fpreg_t f0; /* f0 is byte-order neutral */
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unw_fpreg_t f1_le, f1_be; /* f1 is byte-order dependent */
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}
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read_only;
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unw_fpreg_t nat_val_le, nat_val_be;
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unw_fpreg_t int_val_le, int_val_be;
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struct mempool reg_state_pool;
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struct mempool labeled_state_pool;
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# if UNW_DEBUG
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const char *preg_name[IA64_NUM_PREGS];
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# endif
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};
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#define tdep_getcontext_trace unw_getcontext
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#define tdep_init_done unw.init_done
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#define tdep_init UNW_OBJ(init)
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/* Platforms that support UNW_INFO_FORMAT_TABLE need to define
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tdep_search_unwind_table. */
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#define tdep_search_unwind_table unw_search_ia64_unwind_table
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#define tdep_find_unwind_table ia64_find_unwind_table
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#define tdep_find_proc_info UNW_OBJ(find_proc_info)
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#define tdep_uc_addr UNW_OBJ(uc_addr)
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#define tdep_get_elf_image UNW_ARCH_OBJ(get_elf_image)
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#define tdep_access_reg UNW_OBJ(access_reg)
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#define tdep_access_fpreg UNW_OBJ(access_fpreg)
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#define tdep_fetch_frame(c,ip,n) do {} while(0)
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#define tdep_cache_frame(c,rs) do {} while(0)
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#define tdep_reuse_frame(c,rs) do {} while(0)
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#define tdep_stash_frame(c,rs) do {} while(0)
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#define tdep_trace(cur,addr,n) (-UNW_ENOINFO)
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#define tdep_get_as(c) ((c)->as)
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#define tdep_get_as_arg(c) ((c)->as_arg)
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#define tdep_get_ip(c) ((c)->ip)
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#define tdep_big_endian(as) ((c)->as->big_endian != 0)
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#ifndef UNW_LOCAL_ONLY
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# define tdep_put_unwind_info UNW_OBJ(put_unwind_info)
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#endif
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/* This can't be an UNW_ARCH_OBJ() because we need separate
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unw.initialized flags for the local-only and generic versions of
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the library. Also, if we wanted to have a single, shared global
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data structure, we couldn't declare "unw" as HIDDEN/PROTECTED. */
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#define unw UNW_OBJ(data)
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extern void tdep_init (void);
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extern int tdep_find_unwind_table (struct elf_dyn_info *edi,
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unw_addr_space_t as, char *path,
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unw_word_t segbase, unw_word_t mapoff,
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unw_word_t ip);
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extern int tdep_find_proc_info (unw_addr_space_t as, unw_word_t ip,
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unw_proc_info_t *pi, int need_unwind_info,
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void *arg);
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extern void tdep_put_unwind_info (unw_addr_space_t as,
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unw_proc_info_t *pi, void *arg);
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extern void *tdep_uc_addr (ucontext_t *uc, unw_regnum_t regnum,
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uint8_t *nat_bitnr);
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extern int tdep_get_elf_image (struct elf_image *ei, pid_t pid, unw_word_t ip,
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unsigned long *segbase, unsigned long *mapoff,
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char *path, size_t pathlen);
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extern int tdep_access_reg (struct cursor *c, unw_regnum_t reg,
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unw_word_t *valp, int write);
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extern int tdep_access_fpreg (struct cursor *c, unw_regnum_t reg,
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unw_fpreg_t *valp, int write);
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extern struct ia64_global_unwind_state unw;
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/* In user-level, we have no reasonable way of determining the base of
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an arbitrary backing-store. We default to half the
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address-space. */
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#define rbs_get_base(c,bspstore,rbs_basep) \
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(*(rbs_basep) = (bspstore) - (((unw_word_t) 1) << 63), 0)
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#endif /* IA64_LIBUNWIND_I_H */
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