/* DWARF 2 location expression support for GDB.
- Copyright (C) 2003, 2005, 2007, 2008, 2009, 2010, 2011
- Free Software Foundation, Inc.
+ Copyright (C) 2003-2015 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;
dwarf2read.c and dwarf2loc.c. */
/* `set debug entry-values' setting. */
-extern int entry_values_debug;
+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
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. */
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 type *dwarf2_get_die_type (unsigned int die_offset,
+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);
+/* Find the frame base information for FRAMEFUNC at PC. START is an
+ out parameter which is set to point to the DWARF expression to
+ compute. LENGTH is an out parameter which is set to the length of
+ the DWARF expression. This throws an exception on error or if an
+ expression is not found; the returned length will never be
+ zero. */
+
+extern void func_get_frame_base_dwarf_block (struct symbol *framefunc,
+ CORE_ADDR pc,
+ const gdb_byte **start,
+ size_t *length);
+
/* 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);
+/* Converts a dynamic property into a static one. ADDRESS is the address
+ of the object currently being evaluated and might be nedded.
+ Returns 1 if PROP could be converted and the static value is passed back
+ into VALUE, otherwise returns 0. */
+
+int dwarf2_evaluate_property (const struct dynamic_prop *prop,
+ CORE_ADDR address,
+ CORE_ADDR *value);
+
+/* A helper for the compiler interface that compiles a single dynamic
+ property to C code.
+
+ STREAM is where the C code is to be written.
+ RESULT_NAME is the name of the generated variable.
+ GDBARCH is the architecture to use.
+ REGISTERS_USED is a bit-vector that is filled to note which
+ registers are required by the generated expression.
+ PROP is the property for which code is generated.
+ ADDRESS is the address at which the property is considered to be
+ evaluated.
+ SYM the originating symbol, used for error reporting. */
+
+void dwarf2_compile_property_to_c (struct ui_file *stream,
+ const char *result_name,
+ struct gdbarch *gdbarch,
+ unsigned char *registers_used,
+ const struct dynamic_prop *prop,
+ CORE_ADDR address,
+ struct symbol *sym);
+
+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
/* Length of the location expression. For optimized out expressions it is
zero. */
- unsigned long size;
+ 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;
+};
+
+/* A dynamic property is either expressed as a single location expression
+ or a location list. If the property is an indirection, pointing to
+ another die, keep track of the targeted type in REFERENCED_TYPE. */
+
+struct dwarf2_property_baton
+{
+ /* If the property is an indirection, we need to evaluate the location
+ LOCEXPR or LOCLIST in the context of the type REFERENCED_TYPE.
+ If NULL, the location is the actual value of the property. */
+ struct type *referenced_type;
+ union
+ {
+ /* Location expression. */
+ struct dwarf2_locexpr_baton locexpr;
+
+ /* Location list to be evaluated in the context of REFERENCED_TYPE. */
+ struct dwarf2_loclist_baton loclist;
+ };
};
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.
CORE_ADDR caller_pc,
CORE_ADDR callee_pc);
+/* A helper function to convert a DWARF register to an arch register.
+ ARCH is the architecture.
+ DWARF_REG is the register.
+ This will throw an exception if the DWARF register cannot be
+ translated to an architecture register. */
+
+extern int dwarf2_reg_to_regnum_or_error (struct gdbarch *arch, int dwarf_reg);
+
#endif /* dwarf2loc.h */
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