+++ /dev/null
-/* DWARF 2 location expression support for GDB.
-
- Copyright (C) 2003, 2005, 2007, 2008, 2009, 2010, 2011
- Free Software Foundation, Inc.
-
- This file is part of GDB.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
-
-#if !defined (DWARF2LOC_H)
-#define DWARF2LOC_H
-
-struct symbol_computed_ops;
-struct objfile;
-struct dwarf2_per_cu_data;
-struct dwarf2_loclist_baton;
-struct agent_expr;
-struct axs_value;
-
-/* This header is private to the DWARF-2 reader. It is shared between
- dwarf2read.c and dwarf2loc.c. */
-
-/* `set debug entry-values' setting. */
-extern int entry_values_debug;
-
-/* Return the OBJFILE associated with the compilation unit CU. If CU
- came from a separate debuginfo file, then the master objfile is
- returned. */
-struct objfile *dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *cu);
-
-/* Return the address size given in the compilation unit header for CU. */
-CORE_ADDR dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *cu);
-
-/* Return the DW_FORM_ref_addr size given in the compilation unit header for
- CU. */
-int dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *cu);
-
-/* Return the offset size given in the compilation unit header for CU. */
-int dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *cu);
-
-/* Return the text offset of the CU. The returned offset comes from
- this CU's objfile. If this objfile came from a separate debuginfo
- file, then the offset may be different from the corresponding
- offset in the parent objfile. */
-CORE_ADDR dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *cu);
-
-/* Find a particular location expression from a location list. */
-const gdb_byte *dwarf2_find_location_expression
- (struct dwarf2_loclist_baton *baton,
- size_t *locexpr_length,
- CORE_ADDR pc);
-
-struct dwarf2_locexpr_baton dwarf2_fetch_die_location_block
- (unsigned int offset, struct dwarf2_per_cu_data *per_cu,
- CORE_ADDR (*get_frame_pc) (void *baton),
- void *baton);
-
-struct type *dwarf2_get_die_type (unsigned int die_offset,
- struct dwarf2_per_cu_data *per_cu);
-
-/* Evaluate a location description, starting at DATA and with length
- SIZE, to find the current location of variable of TYPE in the context
- of FRAME. */
-
-struct value *dwarf2_evaluate_loc_desc (struct type *type,
- struct frame_info *frame,
- const gdb_byte *data,
- unsigned short size,
- struct dwarf2_per_cu_data *per_cu);
-
-/* The symbol location baton types used by the DWARF-2 reader (i.e.
- SYMBOL_LOCATION_BATON for a LOC_COMPUTED symbol). "struct
- dwarf2_locexpr_baton" is for a symbol with a single location
- expression; "struct dwarf2_loclist_baton" is for a symbol with a
- location list. */
-
-struct dwarf2_locexpr_baton
-{
- /* Pointer to the start of the location expression. Valid only if SIZE is
- not zero. */
- const gdb_byte *data;
-
- /* Length of the location expression. For optimized out expressions it is
- zero. */
- unsigned long size;
-
- /* The compilation unit containing the symbol whose location
- we're computing. */
- struct dwarf2_per_cu_data *per_cu;
-};
-
-struct dwarf2_loclist_baton
-{
- /* The initial base address for the location list, based on the compilation
- unit. */
- CORE_ADDR base_address;
-
- /* Pointer to the start of the location list. */
- const gdb_byte *data;
-
- /* Length of the location list. */
- unsigned long size;
-
- /* The compilation unit containing the symbol whose location
- we're computing. */
- struct dwarf2_per_cu_data *per_cu;
-};
-
-extern const struct symbol_computed_ops dwarf2_locexpr_funcs;
-extern const struct symbol_computed_ops dwarf2_loclist_funcs;
-
-/* Compile a DWARF location expression to an agent expression.
-
- EXPR is the agent expression we are building.
- LOC is the agent value we modify.
- ARCH is the architecture.
- ADDR_SIZE is the size of addresses, in bytes.
- OP_PTR is the start of the location expression.
- OP_END is one past the last byte of the location expression.
-
- This will throw an exception for various kinds of errors -- for
- example, if the expression cannot be compiled, or if the expression
- is invalid. */
-
-extern void dwarf2_compile_expr_to_ax (struct agent_expr *expr,
- struct axs_value *loc,
- struct gdbarch *arch,
- unsigned int addr_size,
- const gdb_byte *op_ptr,
- const gdb_byte *op_end,
- struct dwarf2_per_cu_data *per_cu);
-
-/* Determined tail calls for constructing virtual tail call frames. */
-
-struct call_site_chain
- {
- /* Initially CALLERS == CALLEES == LENGTH. For partially ambiguous result
- CALLERS + CALLEES < LENGTH. */
- int callers, callees, length;
-
- /* Variably sized array with LENGTH elements. Later [0..CALLERS-1] contain
- top (GDB "prev") sites and [LENGTH-CALLEES..LENGTH-1] contain bottom
- (GDB "next") sites. One is interested primarily in the PC field. */
- struct call_site *call_site[1];
- };
-
-struct call_site_stuff;
-extern struct call_site_chain *call_site_find_chain (struct gdbarch *gdbarch,
- CORE_ADDR caller_pc,
- CORE_ADDR callee_pc);
-
-#endif /* dwarf2loc.h */
projects / thirdparty / binutils-gdb.git / blobdiff