/* DWARF 2 location expression support for GDB.
- Copyright (C) 2003, 2005, 2007, 2008, 2009, 2010, 2011
- Free Software Foundation, Inc.
+ Copyright (C) 2003-2014 Free Software Foundation, Inc.
This file is part of GDB.
#if !defined (DWARF2LOC_H)
#define DWARF2LOC_H
+#include "dwarf2expr.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 unsigned 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);
+int 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);
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,
+struct dwarf2_locexpr_baton dwarf2_fetch_die_loc_sect_off
+ (sect_offset offset_in_cu, struct dwarf2_per_cu_data *per_cu,
+ CORE_ADDR (*get_frame_pc) (void *baton),
+ void *baton);
+
+struct dwarf2_locexpr_baton dwarf2_fetch_die_loc_cu_off
+ (cu_offset offset_in_cu, struct dwarf2_per_cu_data *per_cu,
CORE_ADDR (*get_frame_pc) (void *baton),
void *baton);
+extern const gdb_byte *dwarf2_fetch_constant_bytes (sect_offset,
+ struct dwarf2_per_cu_data *,
+ struct obstack *,
+ LONGEST *);
+
+struct type *dwarf2_get_die_type (cu_offset 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,
+ size_t size,
struct dwarf2_per_cu_data *per_cu);
+CORE_ADDR dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu,
+ unsigned int addr_index);
+
/* 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
struct dwarf2_locexpr_baton
{
- /* Pointer to the start of the location expression. */
+ /* Pointer to the start of the location expression. Valid only if SIZE is
+ not zero. */
const gdb_byte *data;
- /* Length of the location expression. */
- unsigned long size;
+ /* Length of the location expression. For optimized out expressions it is
+ zero. */
+ size_t size;
/* The compilation unit containing the symbol whose location
we're computing. */
const gdb_byte *data;
/* Length of the location list. */
- unsigned long size;
+ size_t size;
/* The compilation unit containing the symbol whose location
we're computing. */
struct dwarf2_per_cu_data *per_cu;
+
+ /* Non-zero if the location list lives in .debug_loc.dwo.
+ The format of entries in this section are different. */
+ unsigned char from_dwo;
};
extern const struct symbol_computed_ops dwarf2_locexpr_funcs;
extern const struct symbol_computed_ops dwarf2_loclist_funcs;
+extern const struct symbol_block_ops dwarf2_block_frame_base_locexpr_funcs;
+extern const struct symbol_block_ops dwarf2_block_frame_base_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 */
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