/* DWARF 2 location expression support for GDB.
- Copyright (C) 2003-2014 Free Software Foundation, Inc.
+ Copyright (C) 2003-2019 Free Software Foundation, Inc.
This file is part of GDB.
offset in the parent objfile. */
CORE_ADDR dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *cu);
+short dwarf2_version (struct dwarf2_per_cu_data *per_cu);
+
/* Find a particular location expression from a location list. */
const gdb_byte *dwarf2_find_location_expression
(struct dwarf2_loclist_baton *baton,
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);
+ void *baton, bool resolve_abstract_p = false);
struct dwarf2_locexpr_baton dwarf2_fetch_die_loc_cu_off
(cu_offset offset_in_cu, struct dwarf2_per_cu_data *per_cu,
struct obstack *,
LONGEST *);
+struct type *dwarf2_fetch_die_type_sect_off (sect_offset,
+ struct dwarf2_per_cu_data *);
+
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. */
size_t size,
struct dwarf2_per_cu_data *per_cu);
-/* Converts a dynamic property into a static one. ADDR 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. */
+/* A chain of addresses that might be needed to resolve a dynamic
+ property. */
+
+struct property_addr_info
+{
+ /* The type of the object whose dynamic properties, if any, are
+ being resolved. */
+ struct type *type;
+
+ /* If not NULL, a buffer containing the object's value. */
+ const gdb_byte *valaddr;
+
+ /* The address of that object. */
+ CORE_ADDR addr;
+
+ /* If not NULL, a pointer to the info for the object containing
+ the object described by this node. */
+ struct property_addr_info *next;
+};
-int dwarf2_evaluate_property (const struct dynamic_prop *prop,
- CORE_ADDR *value);
+/* Converts a dynamic property into a static one. FRAME is the frame in which
+ the property is evaluated; if NULL, the selected frame (if any) is used
+ instead.
+
+ ADDR_STACK is the stack of addresses that might be needed to evaluate the
+ property. When evaluating a property that is not related to a type, it can
+ be NULL.
+
+ Returns true if PROP could be converted and the static value is passed
+ back into VALUE, otherwise returns false. */
+
+bool dwarf2_evaluate_property (const struct dynamic_prop *prop,
+ struct frame_info *frame,
+ struct property_addr_info *addr_stack,
+ 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 (string_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);
zero. */
size_t size;
+ /* When true this location expression is a reference and actually
+ describes the address at which the value of the attribute can be
+ found. When false the expression provides the value of the attribute
+ directly. */
+ bool is_reference;
+
/* The compilation unit containing the symbol whose location
we're computing. */
struct dwarf2_per_cu_data *per_cu;
unsigned char from_dwo;
};
+/* The baton used when a dynamic property is an offset to a parent
+ type. This can be used, for instance, then the bound of an array
+ inside a record is determined by the value of another field inside
+ that record. */
+
+struct dwarf2_offset_baton
+{
+ /* The offset from the parent type where the value of the property
+ is stored. In the example provided above, this would be the offset
+ of the field being used as the array bound. */
+ LONGEST offset;
+
+ /* The type of the object whose property is dynamic. In the example
+ provided above, this would the array's index type. */
+ struct type *type;
+};
+
/* 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. */
+ another die, keep track of the targeted type in PROPERTY_TYPE.
+ Alternatively, if the property location gives the property value
+ directly then it will have PROPERTY_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;
+ in the context of the type PROPERTY_TYPE. If the property is supplied
+ by value then it will be of PROPERTY_TYPE. This field should never be
+ NULL. */
+ struct type *property_type;
union
{
- /* Location expression. */
+ /* Location expression either evaluated in the context of
+ PROPERTY_TYPE, or a value of type PROPERTY_TYPE. */
struct dwarf2_locexpr_baton locexpr;
- /* Location list to be evaluated in the context of REFERENCED_TYPE. */
+ /* Location list to be evaluated in the context of PROPERTY_TYPE. */
struct dwarf2_loclist_baton loclist;
+
+ /* The location is an offset to PROPERTY_TYPE. */
+ struct dwarf2_offset_baton offset_info;
};
};
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,
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.
+ If DWARF_REG is bad then a complaint is issued and -1 is returned.
+ Note: Some targets get this wrong. */
+
+extern int dwarf_reg_to_regnum (struct gdbarch *arch, int dwarf_reg);
+
+/* A wrapper on dwarf_reg_to_regnum to throw an exception if the
+ DWARF register cannot be translated to an architecture register.
+ This takes a ULONGEST instead of an int because some callers actually have
+ a ULONGEST. Negative values passed as ints will still be flagged as
+ invalid. */
+
+extern int dwarf_reg_to_regnum_or_error (struct gdbarch *arch,
+ ULONGEST dwarf_reg);
+
#endif /* dwarf2loc.h */
projects / deliverable / binutils-gdb.git / blobdiff