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(Logical change 1.28)
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/* libunwind - a platform-independent unwind library
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Copyright (C) 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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#ifndef LIBUNWIND_DYNAMIC_H
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#define LIBUNWIND_DYNAMIC_H
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/* This file defines the runtime-support routines for dynamically
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generated code. Even though it is implemented as part of
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libunwind, it is logically separate from the interface to perform
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the actual unwinding. In particular, this interface is always used
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in the context of the unwind target, whereas the rest of the unwind
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API is used in context of the process that is doing the unwind
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(which may be a debugger running on another machine, for
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example). */
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typedef enum
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{
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UNW_OP_SAVE_REG, /* save register to another register */
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UNW_OP_SPILL_FP_REL, /* frame-pointer-relative register spill */
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UNW_OP_SPILL_SP_REL, /* stack-pointer-relative register spill */
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UNW_OP_ADD, /* add constant value to a register */
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UNW_OP_POP_STACK, /* drop one or more stack frames */
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UNW_OP_LABEL_STATE, /* name the current state */
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UNW_OP_COPY_STATE, /* set the region's entry-state */
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UNW_OP_ALIAS, /* get unwind info from an alias */
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UNW_OP_STOP /* end-of-unwind-info marker */
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}
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unw_operator_t;
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typedef struct unw_proc_info
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{
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unsigned long private[4]; /* reserved for use by libunwind */
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void *proc_start; /* first text-address of procedure */
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void *proc_end; /* first text-address beyond the procedure */
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unsigned long flags;
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const char *proc_name; /* unique & human-readable procedure name */
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void *creator_hook; /* hook for whoever created this procedure */
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unsigned long reserved[7]; /* reserved for future extensions */
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}
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unw_proc_info_t;
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typedef struct unw_region_info
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{
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struct unw_region_info *next; /* NULL-terminated list of regions */
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void *creator_hook;
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unsigned int insn_count; /* region length (# of instructions) */
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unsigned int op_count; /* length of op-array */
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unsigned long reserved[5];
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struct unw_op_t
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{
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unsigned int tag : 16; /* what operation? */
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unsigned int reg : 16; /* what register */
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unsigned int when : 32; /* when does it take effect? */
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unsigned long val; /* auxiliary value */
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}
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op[1];
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}
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unw_region_info_t;
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/* Return the size (in bytes) of an unw_region_info_t structure that can
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hold OP_COUNT ops. */
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#define unw_region_info_size(op_count) \
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(sizeof (unw_region_info_t) \
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+ (op_count > 0) ? ((op_count) - 1) * sizeof (struct unw_op) : 0)
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/* Register the unwind info for a single procedure.
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This routine is NOT signal-safe. */
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extern int unw_register_proc (unw_proc_info_t *proc);
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/* Cancel the unwind info for a single procedure.
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This routine is NOT signal-safe. */
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extern int unw_cancel_proc (unw_proc_info_t *proc);
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/* Convenience routines. */
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#define unw_op(tag, when, reg, val) \
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(struct unw_op_t) { \
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.tag = (tag), \
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.when = (when), \
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.reg = (reg), \
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.val = (val) \
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}
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#define unw_op_save_reg(op, when, reg, dst) \
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unw_op(UNW_OP_SAVE_REG, (when), (reg), (dst))
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#define unw_op_spill_fp_rel(when, reg, offset) \
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unw_op(UNW_OP_SPILL_FP_REL, (when), (reg), (offset))
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#define unw_op_spill_sp_rel(when, reg, offset) \
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unw_op(UNW_OP_SPILL_SP_REL, (when), (reg), (offset))
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#define unw_op_add(when, reg, value) \
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unw_op(UNW_OP_ADD, (when), (reg), (value))
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#define unw_op_pop_stack(op, num_frames) \
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unw_op(UNW_OP_POP_STACK, (when), 0, (num_frames))
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#define unw_op_label_state(op, when, label) \
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unw_op(UNW_OP_LABEL_STATE, (when), 0, (label))
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#define unw_op_copy_state(op, when, label) \
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unw_op(UNW_OP_COPY_STATE, (when), 0, (label))
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#define unw_op_alias(op, when, delta) \
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unw_op(UNW_OP_ALIAS, (when), 0, (label))
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#endif /* LIBUNWIND_DYNAMIC_H */
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