8a9b8146fd
PR gdb/12617: * value.h (value_from_contents): Declare. * value.c (value_from_contents): New function. * dwarf2read.c (dwarf_stack_op_name): Add new values. (dwarf2_get_die_type): New function. * dwarf2loc.c (dwarf_expr_get_base_type): New function. (allocate_piece_closure): Acquire reference to values. (read_pieced_value): Update for value-based expressions. (write_pieced_value): Likewise. (free_pieced_value_closure): Call value_free as needed. (dwarf2_evaluate_loc_desc_full): Set get_base_type field. Update for value-based expressions. * dwarf2loc.h (dwarf2_get_die_type): Declare. * dwarf2expr.h (struct dwarf_stack_value) <value>: Change type. <get_base_type>: New field. (struct dwarf_expr_piece) <v.value>: Change type. <v.regno>: New field. (struct dwarf_expr_context) <mark>: New field. (dwarf_expr_piece, dwarf_expr_fetch): Update. (dwarf_expr_pop, dwarf_expr_push): Remove. (dwarf_expr_push_address): Declare. * dwarf2expr.c (dwarf_arch_cookie): New global. (struct dwarf_gdbarch_types): New. (dwarf_gdbarch_types_init, dwarf_expr_address_type): New functions. (dwarf_expr_push): Change type of 'value' argument. Update. Now static. (dwarf_expr_push_address): New function. (dwarf_expr_pop): Now static. (dwarf_expr_fetch): Change return type. (dwarf_require_integral): New function. (dwarf_expr_fetch): Simplify. (add_piece): Update. (base_types_equal_p, dwarf_get_base_type, get_unsigned_type): New functions. (execute_stack_op) <sign_ext>: Remove. Use values for DWARF stack. <DW_OP_GNU_const_type, DW_OP_GNU_deref_type, DW_OP_GNU_regval_type, DW_OP_GNU_convert, DW_OP_GNU_reinterpret>: New cases. (_initialize_dwarf2expr): New function. (add_piece): Update. (new_dwarf_expr_context): Set new field. (free_dwarf_expr_context): Call value_free_to_mark. * dwarf2-frame.c (no_base_type): New function. (execute_stack_op): Set get_base_type field. Update. gdb/testsuite * gdb.dwarf2/typeddwarf.S: New file. * gdb.dwarf2/typeddwarf.c: New file. * gdb.dwarf2/typeddwarf.exp: New file.
136 lines
4.6 KiB
C
136 lines
4.6 KiB
C
/* DWARF 2 location expression support for GDB.
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Copyright (C) 2003, 2005, 2007, 2008, 2009, 2010, 2011
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Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#if !defined (DWARF2LOC_H)
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#define DWARF2LOC_H
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struct symbol_computed_ops;
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struct objfile;
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struct dwarf2_per_cu_data;
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struct dwarf2_loclist_baton;
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struct agent_expr;
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struct axs_value;
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/* This header is private to the DWARF-2 reader. It is shared between
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dwarf2read.c and dwarf2loc.c. */
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/* Return the OBJFILE associated with the compilation unit CU. If CU
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came from a separate debuginfo file, then the master objfile is
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returned. */
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struct objfile *dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *cu);
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/* Return the address size given in the compilation unit header for CU. */
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CORE_ADDR dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *cu);
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/* Return the offset size given in the compilation unit header for CU. */
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int dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *cu);
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/* Return the text offset of the CU. The returned offset comes from
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this CU's objfile. If this objfile came from a separate debuginfo
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file, then the offset may be different from the corresponding
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offset in the parent objfile. */
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CORE_ADDR dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *cu);
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/* Find a particular location expression from a location list. */
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const gdb_byte *dwarf2_find_location_expression
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(struct dwarf2_loclist_baton *baton,
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size_t *locexpr_length,
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CORE_ADDR pc);
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struct dwarf2_locexpr_baton dwarf2_fetch_die_location_block
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(unsigned int offset, struct dwarf2_per_cu_data *per_cu,
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CORE_ADDR (*get_frame_pc) (void *baton),
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void *baton);
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struct type *dwarf2_get_die_type (unsigned int die_offset,
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struct dwarf2_per_cu_data *per_cu);
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/* Evaluate a location description, starting at DATA and with length
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SIZE, to find the current location of variable of TYPE in the context
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of FRAME. */
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struct value *dwarf2_evaluate_loc_desc (struct type *type,
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struct frame_info *frame,
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const gdb_byte *data,
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unsigned short size,
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struct dwarf2_per_cu_data *per_cu);
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/* The symbol location baton types used by the DWARF-2 reader (i.e.
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SYMBOL_LOCATION_BATON for a LOC_COMPUTED symbol). "struct
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dwarf2_locexpr_baton" is for a symbol with a single location
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expression; "struct dwarf2_loclist_baton" is for a symbol with a
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location list. */
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struct dwarf2_locexpr_baton
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{
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/* Pointer to the start of the location expression. */
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const gdb_byte *data;
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/* Length of the location expression. */
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unsigned long size;
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/* The compilation unit containing the symbol whose location
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we're computing. */
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struct dwarf2_per_cu_data *per_cu;
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};
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struct dwarf2_loclist_baton
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{
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/* The initial base address for the location list, based on the compilation
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unit. */
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CORE_ADDR base_address;
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/* Pointer to the start of the location list. */
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const gdb_byte *data;
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/* Length of the location list. */
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unsigned long size;
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/* The compilation unit containing the symbol whose location
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we're computing. */
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struct dwarf2_per_cu_data *per_cu;
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};
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extern const struct symbol_computed_ops dwarf2_locexpr_funcs;
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extern const struct symbol_computed_ops dwarf2_loclist_funcs;
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/* Compile a DWARF location expression to an agent expression.
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EXPR is the agent expression we are building.
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LOC is the agent value we modify.
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ARCH is the architecture.
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ADDR_SIZE is the size of addresses, in bytes.
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OP_PTR is the start of the location expression.
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OP_END is one past the last byte of the location expression.
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This will throw an exception for various kinds of errors -- for
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example, if the expression cannot be compiled, or if the expression
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is invalid. */
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extern void dwarf2_compile_expr_to_ax (struct agent_expr *expr,
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struct axs_value *loc,
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struct gdbarch *arch,
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unsigned int addr_size,
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const gdb_byte *op_ptr,
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const gdb_byte *op_end,
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struct dwarf2_per_cu_data *per_cu);
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#endif /* dwarf2loc.h */
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