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258 lines
10 KiB
C
258 lines
10 KiB
C
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/* libunwind - a platform-independent unwind library
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Copyright (C) 2001-2004 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 UNW_VERSION_MAJOR 1
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#define UNW_VERSION_MINOR 1
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#define UNW_VERSION_EXTRA
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#define UNW_VERSION_CODE(maj,min) (((maj) << 16) | (min))
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#define UNW_VERSION UNW_VERSION_CODE(UNW_VERSION_MAJOR, UNW_VERSION_MINOR)
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#define UNW_PASTE2(x,y) x##y
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#define UNW_PASTE(x,y) UNW_PASTE2(x,y)
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#define UNW_OBJ(fn) UNW_PASTE(UNW_PREFIX, fn)
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#define UNW_ARCH_OBJ(fn) UNW_PASTE(UNW_PASTE(UNW_PASTE(_U,UNW_TARGET),_), fn)
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#ifdef UNW_LOCAL_ONLY
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# define UNW_PREFIX UNW_PASTE(UNW_PASTE(_UL,UNW_TARGET),_)
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#else /* !UNW_LOCAL_ONLY */
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# define UNW_PREFIX UNW_PASTE(UNW_PASTE(_U,UNW_TARGET),_)
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#endif /* !UNW_LOCAL_ONLY */
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/* Error codes. The unwind routines return the *negated* values of
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these error codes on error and a non-negative value on success. */
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typedef enum
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{
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UNW_ESUCCESS = 0, /* no error */
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UNW_EUNSPEC, /* unspecified (general) error */
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UNW_ENOMEM, /* out of memory */
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UNW_EBADREG, /* bad register number */
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UNW_EREADONLYREG, /* attempt to write read-only register */
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UNW_ESTOPUNWIND, /* stop unwinding */
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UNW_EINVALIDIP, /* invalid IP */
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UNW_EBADFRAME, /* bad frame */
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UNW_EINVAL, /* unsupported operation or bad value */
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UNW_EBADVERSION, /* unwind info has unsupported version */
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UNW_ENOINFO /* no unwind info found */
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}
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unw_error_t;
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/* The following enum defines the indices for a couple of
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(pseudo-)registers which have the same meaning across all
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platforms. (RO) means read-only. (RW) means read-write. General
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registers (aka "integer registers") are expected to start with
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index 0. The number of such registers is architecture-dependent.
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The remaining indices can be used as an architecture sees fit. The
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last valid register index is given by UNW_REG_LAST. */
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typedef enum
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{
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UNW_REG_IP = UNW_TDEP_IP, /* (rw) instruction pointer (pc) */
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UNW_REG_SP = UNW_TDEP_SP, /* (ro) stack pointer */
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UNW_REG_EH = UNW_TDEP_EH, /* (rw) exception-handling reg base */
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UNW_REG_LAST = UNW_TDEP_LAST_REG
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}
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unw_frame_regnum_t;
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/* Number of exception-handler argument registers: */
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#define UNW_NUM_EH_REGS UNW_TDEP_NUM_EH_REGS
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typedef enum
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{
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UNW_CACHE_NONE, /* no caching */
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UNW_CACHE_GLOBAL, /* shared global cache */
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UNW_CACHE_PER_THREAD /* per-thread caching */
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}
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unw_caching_policy_t;
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typedef int unw_regnum_t;
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/* The unwind cursor starts at the youngest (most deeply nested) frame
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and is used to track the frame state as the unwinder steps from
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frame to frame. It is safe to make (shallow) copies of variables
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of this type. */
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typedef struct unw_cursor
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{
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unw_word_t opaque[UNW_TDEP_CURSOR_LEN];
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}
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unw_cursor_t;
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/* This type encapsulates the entire (preserved) machine-state. */
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typedef unw_tdep_context_t unw_context_t;
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/* unw_getcontext() fills the unw_context_t pointed to by UC with the
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machine state as it exists at the call-site. For implementation
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reasons, this needs to be a target-dependent macro. It's easiest
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to think of unw_getcontext() as being identical to getcontext(). */
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#define unw_getcontext(uc) unw_tdep_getcontext(uc)
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/* Return 1 if register number R is a floating-point register, zero
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otherwise.
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This routine is signal-safe. */
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#define unw_is_fpreg(r) unw_tdep_is_fpreg(r)
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typedef unw_tdep_fpreg_t unw_fpreg_t;
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typedef struct unw_addr_space *unw_addr_space_t;
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/* Each target may define it's own set of flags, but bits 0-15 are
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reserved for general libunwind-use. */
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#define UNW_PI_FLAG_FIRST_TDEP_BIT 16
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/* The information comes from a .debug_frame section. */
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#define UNW_PI_FLAG_DEBUG_FRAME 32
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typedef struct unw_proc_info
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{
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unw_word_t start_ip; /* first IP covered by this procedure */
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unw_word_t end_ip; /* first IP NOT covered by this procedure */
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unw_word_t lsda; /* address of lang.-spec. data area (if any) */
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unw_word_t handler; /* optional personality routine */
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unw_word_t gp; /* global-pointer value for this procedure */
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unw_word_t flags; /* misc. flags */
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int format; /* unwind-info format (arch-specific) */
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int unwind_info_size; /* size of the information (if applicable) */
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void *unwind_info; /* unwind-info (arch-specific) */
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unw_tdep_proc_info_t extra; /* target-dependent auxiliary proc-info */
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}
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unw_proc_info_t;
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/* These are backend callback routines that provide access to the
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state of a "remote" process. This can be used, for example, to
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unwind another process through the ptrace() interface. */
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typedef struct unw_accessors
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{
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/* Look up the unwind info associated with instruction-pointer IP.
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On success, the routine fills in the PROC_INFO structure. */
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int (*find_proc_info) (unw_addr_space_t, unw_word_t, unw_proc_info_t *,
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int, void *);
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/* Release any resources (e.g., memory) that were allocated for
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the unwind info returned in by a previous call to
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find_proc_info() with NEED_UNWIND_INFO set to 1. */
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void (*put_unwind_info) (unw_addr_space_t, unw_proc_info_t *, void *);
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/* Return the list-head of the dynamically registered unwind
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info. */
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int (*get_dyn_info_list_addr) (unw_addr_space_t, unw_word_t *, void *);
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/* Access aligned word at address ADDR. The value is returned
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according to the endianness of the host (e.g., if the host is
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little-endian and the target is big-endian, access_mem() needs
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to byte-swap the value before returning it). */
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int (*access_mem) (unw_addr_space_t, unw_word_t, unw_word_t *, int,
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void *);
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/* Access register number REG at address ADDR. */
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int (*access_reg) (unw_addr_space_t, unw_regnum_t, unw_word_t *, int,
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void *);
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/* Access register number REG at address ADDR. */
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int (*access_fpreg) (unw_addr_space_t, unw_regnum_t,
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unw_fpreg_t *, int, void *);
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int (*resume) (unw_addr_space_t, unw_cursor_t *, void *);
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/* Optional call back to obtain the name of a (static) procedure.
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Dynamically generated procedures are handled automatically by
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libunwind. This callback is optional and may be set to
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NULL. */
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int (*get_proc_name) (unw_addr_space_t, unw_word_t, char *, size_t,
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unw_word_t *, void *);
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}
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unw_accessors_t;
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typedef enum unw_save_loc_type
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{
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UNW_SLT_NONE, /* register is not saved ("not an l-value") */
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UNW_SLT_MEMORY, /* register has been saved in memory */
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UNW_SLT_REG /* register has been saved in (another) register */
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}
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unw_save_loc_type_t;
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typedef struct unw_save_loc
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{
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unw_save_loc_type_t type;
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union
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{
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unw_word_t addr; /* valid if type==UNW_SLT_MEMORY */
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unw_regnum_t regnum; /* valid if type==UNW_SLT_REG */
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}
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u;
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unw_tdep_save_loc_t extra; /* target-dependent additional information */
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}
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unw_save_loc_t;
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/* These routines work both for local and remote unwinding. */
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#define unw_local_addr_space UNW_OBJ(local_addr_space)
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#define unw_create_addr_space UNW_OBJ(create_addr_space)
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#define unw_destroy_addr_space UNW_OBJ(destroy_addr_space)
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#define unw_get_accessors UNW_ARCH_OBJ(get_accessors)
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#define unw_init_local UNW_OBJ(init_local)
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#define unw_init_remote UNW_OBJ(init_remote)
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#define unw_step UNW_OBJ(step)
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#define unw_resume UNW_OBJ(resume)
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#define unw_get_proc_info UNW_OBJ(get_proc_info)
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#define unw_get_proc_info_by_ip UNW_OBJ(get_proc_info_by_ip)
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#define unw_get_reg UNW_OBJ(get_reg)
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#define unw_set_reg UNW_OBJ(set_reg)
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#define unw_get_fpreg UNW_OBJ(get_fpreg)
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#define unw_set_fpreg UNW_OBJ(set_fpreg)
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#define unw_get_save_loc UNW_OBJ(get_save_loc)
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#define unw_is_signal_frame UNW_OBJ(is_signal_frame)
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#define unw_handle_signal_frame UNW_OBJ(handle_signal_frame)
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#define unw_get_proc_name UNW_OBJ(get_proc_name)
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#define unw_set_caching_policy UNW_OBJ(set_caching_policy)
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#define unw_regname UNW_ARCH_OBJ(regname)
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#define unw_flush_cache UNW_ARCH_OBJ(flush_cache)
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#define unw_strerror UNW_ARCH_OBJ(strerror)
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extern unw_addr_space_t unw_create_addr_space (unw_accessors_t *, int);
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extern void unw_destroy_addr_space (unw_addr_space_t);
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extern unw_accessors_t *unw_get_accessors (unw_addr_space_t);
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extern void unw_flush_cache (unw_addr_space_t, unw_word_t, unw_word_t);
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extern int unw_set_caching_policy (unw_addr_space_t, unw_caching_policy_t);
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extern const char *unw_regname (unw_regnum_t);
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extern int unw_init_local (unw_cursor_t *, unw_context_t *);
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extern int unw_init_remote (unw_cursor_t *, unw_addr_space_t, void *);
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extern int unw_step (unw_cursor_t *);
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extern int unw_resume (unw_cursor_t *);
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extern int unw_get_proc_info (unw_cursor_t *, unw_proc_info_t *);
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extern int unw_get_proc_info_by_ip (unw_addr_space_t, unw_word_t,
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unw_proc_info_t *, void *);
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extern int unw_get_reg (unw_cursor_t *, int, unw_word_t *);
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extern int unw_set_reg (unw_cursor_t *, int, unw_word_t);
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extern int unw_get_fpreg (unw_cursor_t *, int, unw_fpreg_t *);
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extern int unw_set_fpreg (unw_cursor_t *, int, unw_fpreg_t);
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extern int unw_get_save_loc (unw_cursor_t *, int, unw_save_loc_t *);
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extern int unw_is_signal_frame (unw_cursor_t *);
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extern int unw_handle_signal_frame (unw_cursor_t *);
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extern int unw_get_proc_name (unw_cursor_t *, char *, size_t, unw_word_t *);
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extern const char *unw_strerror (int);
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extern int unw_backtrace (void **, int);
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extern unw_addr_space_t unw_local_addr_space;
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