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(UNW_PREFIX): Include the target name in the prefix.
2002/04/05 14:33:32-08:00 hp.com!davidm Rename: include/libunwind.h -> include/libunwind-common.h (Logical change 1.12)
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hp.com!davidm
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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 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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#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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typedef unw_tdep_word_t unw_word_t;
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/* This needs to be big enough to accommodate the unwind state of any
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architecture, while leaving some slack for future expansion.
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Changing this value will require recompiling all users of this
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library. */
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#define UNW_STATE_LEN 127
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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 */
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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_PROC_START = UNW_TDEP_PROC_START, /* (ro) proc startaddr */
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UNW_REG_HANDLER = UNW_TDEP_HANDLER, /* (ro) addr. of personality routine */
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UNW_REG_LSDA = UNW_TDEP_LSDA, /* (ro) addr. of lang.-specific data */
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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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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_STATE_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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/* We will assume that "long double" is sufficiently large and aligned
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to hold the contents of a floating-point register. Note that the
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fp register format is not usually the same format as a "long
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double". Instead, the content of unw_fpreg_t should be manipulated
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only through the "raw.bits" member. */
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typedef union
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{
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struct { unw_word_t bits[1]; } raw;
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long double dummy; /* dummy to force 16-byte alignment */
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}
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unw_fpreg_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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/* Lock for unwind info for address IP. The architecture specific
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UNWIND_INFO is updated as necessary. */
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int (*acquire_unwind_info) (unw_word_t ip, void *unwind_info, void *arg);
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int (*release_unwind_info) (void *unwind_info, void *arg);
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/* Access aligned word at address ADDR. */
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int (*access_mem) (unw_word_t addr, unw_word_t *val, int write, void *arg);
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/* Access register number REG at address ADDR. */
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int (*access_reg) (unw_regnum_t reg, unw_word_t *val, int write,
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void *arg);
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/* Access register number REG at address ADDR. */
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int (*access_fpreg) (unw_regnum_t reg, unw_fpreg_t *val, int write,
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void *arg);
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int (*resume) (unw_cursor_t *c, void *arg);
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void *arg; /* application-specific data */
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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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extern int UNW_OBJ(init_local) (unw_cursor_t *c, ucontext_t *u);
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extern int UNW_OBJ(init_remote) (unw_cursor_t *c, unw_accessors_t *a);
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extern int UNW_OBJ(step) (unw_cursor_t *c);
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extern int UNW_OBJ(resume) (unw_cursor_t *c);
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extern int UNW_OBJ(get_reg) (unw_cursor_t *c, int regnum, unw_word_t *valp);
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extern int UNW_OBJ(set_reg) (unw_cursor_t *c, int regnum, unw_word_t val);
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extern int UNW_OBJ(get_fpreg) (unw_cursor_t *c, int regnum, unw_fpreg_t *val);
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extern int UNW_OBJ(set_fpreg) (unw_cursor_t *c, int regnum, unw_fpreg_t val);
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extern int UNW_OBJ(get_save_loc) (unw_cursor_t *c, int regnum,
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unw_save_loc_t *loc);
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extern int UNW_OBJ(is_signal_frame) (unw_cursor_t *c);
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/* Initialize cursor C such that unwinding starts at the point
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represented by the context U. Returns zero on success, negative
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value on failure. */
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#define unw_init_local(c,u) UNW_OBJ(init_local)(c, u)
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/* Initialize cursor C such that it accesses the unwind target through
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accessors A. */
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#define unw_init_remote(c,a) UNW_OBJ(init_remote)(c, a)
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/* Move cursor up by one step (up meaning toward earlier, less deeply
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nested frames). Returns positive number if there are more frames
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to unwind, 0 if last frame has been reached, negative number in
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case of an error. */
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#define unw_step(c) UNW_OBJ(step)(c)
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/* Resume execution at the point identified by the cursor. */
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#define unw_resume(c) UNW_OBJ(resume)(c)
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/* Register accessor routines. Return zero on success, negative value
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on failure. */
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#define unw_get_reg(c,r,v) UNW_OBJ(get_reg)(c,r,v)
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#define unw_set_reg(c,r,v) UNW_OBJ(set_reg)(c,r,v)
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/* Floating-point accessor routines. Return zero on success, negative
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value on failure. */
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#define unw_get_fpreg(c,r,v) UNW_OBJ(get_fpreg)(c,r,v)
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#define unw_set_fpreg(c,r,v) UNW_OBJ(set_fpreg)(c,r,v)
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#define unw_get_save_loc(c,r,l) UNW_OBJ(get_save_loc)(c,r,l)
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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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#define unw_is_fpreg(r) unw_tdep_is_fpreg(r)
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/* Returns non-zero value if the cursor points to a signal frame. */
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#define unw_is_signal_frame(c) UNW_OBJ(is_signal_frame)(c)
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