Based on a patch from Daniel Berlin (dberlin@dberlin.org).
* symtab.h: Add opaque declarations of struct axs_value and
struct agent_expr.
(enum address_class): Add LOC_COMPUTED and LOC_COMPUTED_ARG.
(struct location_funcs): New type.
(struct symbol): Add "loc" to aux_value.
(SYMBOL_LOCATION_BATON, SYMBOL_LOCATION_FUNCS): New macros.
* dwarf2read.c: Include "dwarf2expr.h".
(dwarf2_symbol_mark_computed): New function.
(read_func_scope): Use it.
(var_decode_location): New function.
(new_symbol): Use it.
* dwarf2expr.c, dwarf2expr.h, dwarf2loc.c, dwarf2loc.h: New files.
* Makefile.in (SFILES): Add dwarf2loc.c and dwarf2expr.c.
(dwarf2expr_h, dwarf2loc_h): New variables.
(COMMON_OBS): Add dwarf2expr.o and dwarf2loc.o.
(dwarf2expr.o, dwarf2loc.o): New rules.
(dwarf2read.o): Add $(dwarf2expr_h) and $(dwarf2loc_h).
* buildsym.c (finish_block): Handle LOC_COMPUTED and
LOC_COMPUTED_ARG.
* findvar.c (symbol_read_needs_frame, read_var_value): Likewise.
* m2-exp.y (yylex): Likewise.
* printcmd.c (address_info, print_frame_args): Likewise.
* stack.c (print_block_frame_locals, print_frame_arg_vars): Likewise.
* symmisc.c (print_symbol, print_partial_symbols): Likewise.
* ada-lang.c (ada_resolve_subexp, symtab_for_sym)
(ada_add_block_symbols, fill_in_ada_prototype): Likewise.
* symtab.c (lookup_block_symbol): Likewise.
2003-02-21 15:24:18 +00:00
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/* DWARF 2 location expression support for GDB.
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Copyright 2003 Free Software Foundation, Inc.
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Contributed by Daniel Jacobowitz, MontaVista Software, 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 2 of the License, or (at
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your option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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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, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "ui-out.h"
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#include "value.h"
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#include "frame.h"
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#include "gdbcore.h"
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#include "target.h"
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#include "inferior.h"
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2003-02-28 20:03:18 +00:00
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#include "ax.h"
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#include "ax-gdb.h"
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2003-03-05 18:00:02 +00:00
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#include "regcache.h"
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2003-07-22 15:41:59 +00:00
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#include "objfiles.h"
|
Based on a patch from Daniel Berlin (dberlin@dberlin.org).
* symtab.h: Add opaque declarations of struct axs_value and
struct agent_expr.
(enum address_class): Add LOC_COMPUTED and LOC_COMPUTED_ARG.
(struct location_funcs): New type.
(struct symbol): Add "loc" to aux_value.
(SYMBOL_LOCATION_BATON, SYMBOL_LOCATION_FUNCS): New macros.
* dwarf2read.c: Include "dwarf2expr.h".
(dwarf2_symbol_mark_computed): New function.
(read_func_scope): Use it.
(var_decode_location): New function.
(new_symbol): Use it.
* dwarf2expr.c, dwarf2expr.h, dwarf2loc.c, dwarf2loc.h: New files.
* Makefile.in (SFILES): Add dwarf2loc.c and dwarf2expr.c.
(dwarf2expr_h, dwarf2loc_h): New variables.
(COMMON_OBS): Add dwarf2expr.o and dwarf2loc.o.
(dwarf2expr.o, dwarf2loc.o): New rules.
(dwarf2read.o): Add $(dwarf2expr_h) and $(dwarf2loc_h).
* buildsym.c (finish_block): Handle LOC_COMPUTED and
LOC_COMPUTED_ARG.
* findvar.c (symbol_read_needs_frame, read_var_value): Likewise.
* m2-exp.y (yylex): Likewise.
* printcmd.c (address_info, print_frame_args): Likewise.
* stack.c (print_block_frame_locals, print_frame_arg_vars): Likewise.
* symmisc.c (print_symbol, print_partial_symbols): Likewise.
* ada-lang.c (ada_resolve_subexp, symtab_for_sym)
(ada_add_block_symbols, fill_in_ada_prototype): Likewise.
* symtab.c (lookup_block_symbol): Likewise.
2003-02-21 15:24:18 +00:00
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#include "elf/dwarf2.h"
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#include "dwarf2expr.h"
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#include "dwarf2loc.h"
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#include "gdb_string.h"
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#ifndef DWARF2_REG_TO_REGNUM
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#define DWARF2_REG_TO_REGNUM(REG) (REG)
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#endif
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2003-04-13 15:43:35 +00:00
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/* A helper function for dealing with location lists. Given a
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symbol baton (BATON) and a pc value (PC), find the appropriate
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location expression, set *LOCEXPR_LENGTH, and return a pointer
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to the beginning of the expression. Returns NULL on failure.
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For now, only return the first matching location expression; there
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can be more than one in the list. */
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static char *
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find_location_expression (struct dwarf2_loclist_baton *baton,
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2003-05-18 15:49:51 +00:00
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size_t *locexpr_length, CORE_ADDR pc)
|
2003-04-13 15:43:35 +00:00
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{
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CORE_ADDR base_address = baton->base_address;
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CORE_ADDR low, high;
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char *loc_ptr, *buf_end;
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unsigned int addr_size = TARGET_ADDR_BIT / TARGET_CHAR_BIT, length;
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CORE_ADDR base_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
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loc_ptr = baton->data;
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buf_end = baton->data + baton->size;
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while (1)
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{
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low = dwarf2_read_address (loc_ptr, buf_end, &length);
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loc_ptr += length;
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high = dwarf2_read_address (loc_ptr, buf_end, &length);
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loc_ptr += length;
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/* An end-of-list entry. */
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if (low == 0 && high == 0)
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return NULL;
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/* A base-address-selection entry. */
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if ((low & base_mask) == base_mask)
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{
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base_address = high;
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continue;
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}
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/* Otherwise, a location expression entry. */
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low += base_address;
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high += base_address;
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length = extract_unsigned_integer (loc_ptr, 2);
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loc_ptr += 2;
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if (pc >= low && pc < high)
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{
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*locexpr_length = length;
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return loc_ptr;
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}
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loc_ptr += length;
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}
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}
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|
Based on a patch from Daniel Berlin (dberlin@dberlin.org).
* symtab.h: Add opaque declarations of struct axs_value and
struct agent_expr.
(enum address_class): Add LOC_COMPUTED and LOC_COMPUTED_ARG.
(struct location_funcs): New type.
(struct symbol): Add "loc" to aux_value.
(SYMBOL_LOCATION_BATON, SYMBOL_LOCATION_FUNCS): New macros.
* dwarf2read.c: Include "dwarf2expr.h".
(dwarf2_symbol_mark_computed): New function.
(read_func_scope): Use it.
(var_decode_location): New function.
(new_symbol): Use it.
* dwarf2expr.c, dwarf2expr.h, dwarf2loc.c, dwarf2loc.h: New files.
* Makefile.in (SFILES): Add dwarf2loc.c and dwarf2expr.c.
(dwarf2expr_h, dwarf2loc_h): New variables.
(COMMON_OBS): Add dwarf2expr.o and dwarf2loc.o.
(dwarf2expr.o, dwarf2loc.o): New rules.
(dwarf2read.o): Add $(dwarf2expr_h) and $(dwarf2loc_h).
* buildsym.c (finish_block): Handle LOC_COMPUTED and
LOC_COMPUTED_ARG.
* findvar.c (symbol_read_needs_frame, read_var_value): Likewise.
* m2-exp.y (yylex): Likewise.
* printcmd.c (address_info, print_frame_args): Likewise.
* stack.c (print_block_frame_locals, print_frame_arg_vars): Likewise.
* symmisc.c (print_symbol, print_partial_symbols): Likewise.
* ada-lang.c (ada_resolve_subexp, symtab_for_sym)
(ada_add_block_symbols, fill_in_ada_prototype): Likewise.
* symtab.c (lookup_block_symbol): Likewise.
2003-02-21 15:24:18 +00:00
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/* This is the baton used when performing dwarf2 expression
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evaluation. */
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struct dwarf_expr_baton
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{
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struct frame_info *frame;
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struct objfile *objfile;
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};
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/* Helper functions for dwarf2_evaluate_loc_desc. */
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/* Using the frame specified in BATON, read register REGNUM. The lval
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type will be returned in LVALP, and for lval_memory the register
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save address will be returned in ADDRP. */
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|
static CORE_ADDR
|
2003-04-13 15:53:44 +00:00
|
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|
|
dwarf_expr_read_reg (void *baton, int dwarf_regnum)
|
Based on a patch from Daniel Berlin (dberlin@dberlin.org).
* symtab.h: Add opaque declarations of struct axs_value and
struct agent_expr.
(enum address_class): Add LOC_COMPUTED and LOC_COMPUTED_ARG.
(struct location_funcs): New type.
(struct symbol): Add "loc" to aux_value.
(SYMBOL_LOCATION_BATON, SYMBOL_LOCATION_FUNCS): New macros.
* dwarf2read.c: Include "dwarf2expr.h".
(dwarf2_symbol_mark_computed): New function.
(read_func_scope): Use it.
(var_decode_location): New function.
(new_symbol): Use it.
* dwarf2expr.c, dwarf2expr.h, dwarf2loc.c, dwarf2loc.h: New files.
* Makefile.in (SFILES): Add dwarf2loc.c and dwarf2expr.c.
(dwarf2expr_h, dwarf2loc_h): New variables.
(COMMON_OBS): Add dwarf2expr.o and dwarf2loc.o.
(dwarf2expr.o, dwarf2loc.o): New rules.
(dwarf2read.o): Add $(dwarf2expr_h) and $(dwarf2loc_h).
* buildsym.c (finish_block): Handle LOC_COMPUTED and
LOC_COMPUTED_ARG.
* findvar.c (symbol_read_needs_frame, read_var_value): Likewise.
* m2-exp.y (yylex): Likewise.
* printcmd.c (address_info, print_frame_args): Likewise.
* stack.c (print_block_frame_locals, print_frame_arg_vars): Likewise.
* symmisc.c (print_symbol, print_partial_symbols): Likewise.
* ada-lang.c (ada_resolve_subexp, symtab_for_sym)
(ada_add_block_symbols, fill_in_ada_prototype): Likewise.
* symtab.c (lookup_block_symbol): Likewise.
2003-02-21 15:24:18 +00:00
|
|
|
|
{
|
|
|
|
|
struct dwarf_expr_baton *debaton = (struct dwarf_expr_baton *) baton;
|
2003-04-13 15:53:44 +00:00
|
|
|
|
CORE_ADDR result, save_addr;
|
|
|
|
|
enum lval_type lval_type;
|
2003-03-05 18:00:02 +00:00
|
|
|
|
char *buf;
|
|
|
|
|
int optimized, regnum, realnum, regsize;
|
|
|
|
|
|
|
|
|
|
regnum = DWARF2_REG_TO_REGNUM (dwarf_regnum);
|
|
|
|
|
regsize = register_size (current_gdbarch, regnum);
|
|
|
|
|
buf = (char *) alloca (regsize);
|
Based on a patch from Daniel Berlin (dberlin@dberlin.org).
* symtab.h: Add opaque declarations of struct axs_value and
struct agent_expr.
(enum address_class): Add LOC_COMPUTED and LOC_COMPUTED_ARG.
(struct location_funcs): New type.
(struct symbol): Add "loc" to aux_value.
(SYMBOL_LOCATION_BATON, SYMBOL_LOCATION_FUNCS): New macros.
* dwarf2read.c: Include "dwarf2expr.h".
(dwarf2_symbol_mark_computed): New function.
(read_func_scope): Use it.
(var_decode_location): New function.
(new_symbol): Use it.
* dwarf2expr.c, dwarf2expr.h, dwarf2loc.c, dwarf2loc.h: New files.
* Makefile.in (SFILES): Add dwarf2loc.c and dwarf2expr.c.
(dwarf2expr_h, dwarf2loc_h): New variables.
(COMMON_OBS): Add dwarf2expr.o and dwarf2loc.o.
(dwarf2expr.o, dwarf2loc.o): New rules.
(dwarf2read.o): Add $(dwarf2expr_h) and $(dwarf2loc_h).
* buildsym.c (finish_block): Handle LOC_COMPUTED and
LOC_COMPUTED_ARG.
* findvar.c (symbol_read_needs_frame, read_var_value): Likewise.
* m2-exp.y (yylex): Likewise.
* printcmd.c (address_info, print_frame_args): Likewise.
* stack.c (print_block_frame_locals, print_frame_arg_vars): Likewise.
* symmisc.c (print_symbol, print_partial_symbols): Likewise.
* ada-lang.c (ada_resolve_subexp, symtab_for_sym)
(ada_add_block_symbols, fill_in_ada_prototype): Likewise.
* symtab.c (lookup_block_symbol): Likewise.
2003-02-21 15:24:18 +00:00
|
|
|
|
|
2003-04-13 15:53:44 +00:00
|
|
|
|
frame_register (debaton->frame, regnum, &optimized, &lval_type, &save_addr,
|
|
|
|
|
&realnum, buf);
|
2003-05-22 18:37:05 +00:00
|
|
|
|
/* NOTE: cagney/2003-05-22: This extract is assuming that a DWARF 2
|
|
|
|
|
address is always unsigned. That may or may not be true. */
|
|
|
|
|
result = extract_unsigned_integer (buf, regsize);
|
Based on a patch from Daniel Berlin (dberlin@dberlin.org).
* symtab.h: Add opaque declarations of struct axs_value and
struct agent_expr.
(enum address_class): Add LOC_COMPUTED and LOC_COMPUTED_ARG.
(struct location_funcs): New type.
(struct symbol): Add "loc" to aux_value.
(SYMBOL_LOCATION_BATON, SYMBOL_LOCATION_FUNCS): New macros.
* dwarf2read.c: Include "dwarf2expr.h".
(dwarf2_symbol_mark_computed): New function.
(read_func_scope): Use it.
(var_decode_location): New function.
(new_symbol): Use it.
* dwarf2expr.c, dwarf2expr.h, dwarf2loc.c, dwarf2loc.h: New files.
* Makefile.in (SFILES): Add dwarf2loc.c and dwarf2expr.c.
(dwarf2expr_h, dwarf2loc_h): New variables.
(COMMON_OBS): Add dwarf2expr.o and dwarf2loc.o.
(dwarf2expr.o, dwarf2loc.o): New rules.
(dwarf2read.o): Add $(dwarf2expr_h) and $(dwarf2loc_h).
* buildsym.c (finish_block): Handle LOC_COMPUTED and
LOC_COMPUTED_ARG.
* findvar.c (symbol_read_needs_frame, read_var_value): Likewise.
* m2-exp.y (yylex): Likewise.
* printcmd.c (address_info, print_frame_args): Likewise.
* stack.c (print_block_frame_locals, print_frame_arg_vars): Likewise.
* symmisc.c (print_symbol, print_partial_symbols): Likewise.
* ada-lang.c (ada_resolve_subexp, symtab_for_sym)
(ada_add_block_symbols, fill_in_ada_prototype): Likewise.
* symtab.c (lookup_block_symbol): Likewise.
2003-02-21 15:24:18 +00:00
|
|
|
|
|
|
|
|
|
return result;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Read memory at ADDR (length LEN) into BUF. */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
dwarf_expr_read_mem (void *baton, char *buf, CORE_ADDR addr, size_t len)
|
|
|
|
|
{
|
|
|
|
|
read_memory (addr, buf, len);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Using the frame specified in BATON, find the location expression
|
|
|
|
|
describing the frame base. Return a pointer to it in START and
|
|
|
|
|
its length in LENGTH. */
|
|
|
|
|
static void
|
|
|
|
|
dwarf_expr_frame_base (void *baton, unsigned char **start, size_t * length)
|
|
|
|
|
{
|
2003-04-01 19:11:01 +00:00
|
|
|
|
/* FIXME: cagney/2003-03-26: This code should be using
|
|
|
|
|
get_frame_base_address(), and then implement a dwarf2 specific
|
|
|
|
|
this_base method. */
|
Based on a patch from Daniel Berlin (dberlin@dberlin.org).
* symtab.h: Add opaque declarations of struct axs_value and
struct agent_expr.
(enum address_class): Add LOC_COMPUTED and LOC_COMPUTED_ARG.
(struct location_funcs): New type.
(struct symbol): Add "loc" to aux_value.
(SYMBOL_LOCATION_BATON, SYMBOL_LOCATION_FUNCS): New macros.
* dwarf2read.c: Include "dwarf2expr.h".
(dwarf2_symbol_mark_computed): New function.
(read_func_scope): Use it.
(var_decode_location): New function.
(new_symbol): Use it.
* dwarf2expr.c, dwarf2expr.h, dwarf2loc.c, dwarf2loc.h: New files.
* Makefile.in (SFILES): Add dwarf2loc.c and dwarf2expr.c.
(dwarf2expr_h, dwarf2loc_h): New variables.
(COMMON_OBS): Add dwarf2expr.o and dwarf2loc.o.
(dwarf2expr.o, dwarf2loc.o): New rules.
(dwarf2read.o): Add $(dwarf2expr_h) and $(dwarf2loc_h).
* buildsym.c (finish_block): Handle LOC_COMPUTED and
LOC_COMPUTED_ARG.
* findvar.c (symbol_read_needs_frame, read_var_value): Likewise.
* m2-exp.y (yylex): Likewise.
* printcmd.c (address_info, print_frame_args): Likewise.
* stack.c (print_block_frame_locals, print_frame_arg_vars): Likewise.
* symmisc.c (print_symbol, print_partial_symbols): Likewise.
* ada-lang.c (ada_resolve_subexp, symtab_for_sym)
(ada_add_block_symbols, fill_in_ada_prototype): Likewise.
* symtab.c (lookup_block_symbol): Likewise.
2003-02-21 15:24:18 +00:00
|
|
|
|
struct symbol *framefunc;
|
|
|
|
|
struct dwarf_expr_baton *debaton = (struct dwarf_expr_baton *) baton;
|
2003-04-13 15:43:35 +00:00
|
|
|
|
|
Based on a patch from Daniel Berlin (dberlin@dberlin.org).
* symtab.h: Add opaque declarations of struct axs_value and
struct agent_expr.
(enum address_class): Add LOC_COMPUTED and LOC_COMPUTED_ARG.
(struct location_funcs): New type.
(struct symbol): Add "loc" to aux_value.
(SYMBOL_LOCATION_BATON, SYMBOL_LOCATION_FUNCS): New macros.
* dwarf2read.c: Include "dwarf2expr.h".
(dwarf2_symbol_mark_computed): New function.
(read_func_scope): Use it.
(var_decode_location): New function.
(new_symbol): Use it.
* dwarf2expr.c, dwarf2expr.h, dwarf2loc.c, dwarf2loc.h: New files.
* Makefile.in (SFILES): Add dwarf2loc.c and dwarf2expr.c.
(dwarf2expr_h, dwarf2loc_h): New variables.
(COMMON_OBS): Add dwarf2expr.o and dwarf2loc.o.
(dwarf2expr.o, dwarf2loc.o): New rules.
(dwarf2read.o): Add $(dwarf2expr_h) and $(dwarf2loc_h).
* buildsym.c (finish_block): Handle LOC_COMPUTED and
LOC_COMPUTED_ARG.
* findvar.c (symbol_read_needs_frame, read_var_value): Likewise.
* m2-exp.y (yylex): Likewise.
* printcmd.c (address_info, print_frame_args): Likewise.
* stack.c (print_block_frame_locals, print_frame_arg_vars): Likewise.
* symmisc.c (print_symbol, print_partial_symbols): Likewise.
* ada-lang.c (ada_resolve_subexp, symtab_for_sym)
(ada_add_block_symbols, fill_in_ada_prototype): Likewise.
* symtab.c (lookup_block_symbol): Likewise.
2003-02-21 15:24:18 +00:00
|
|
|
|
framefunc = get_frame_function (debaton->frame);
|
2003-04-13 15:43:35 +00:00
|
|
|
|
|
|
|
|
|
if (SYMBOL_LOCATION_FUNCS (framefunc) == &dwarf2_loclist_funcs)
|
|
|
|
|
{
|
|
|
|
|
struct dwarf2_loclist_baton *symbaton;
|
|
|
|
|
symbaton = SYMBOL_LOCATION_BATON (framefunc);
|
|
|
|
|
*start = find_location_expression (symbaton, length,
|
|
|
|
|
get_frame_pc (debaton->frame));
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
struct dwarf2_locexpr_baton *symbaton;
|
|
|
|
|
symbaton = SYMBOL_LOCATION_BATON (framefunc);
|
|
|
|
|
*length = symbaton->size;
|
|
|
|
|
*start = symbaton->data;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (*start == NULL)
|
|
|
|
|
error ("Could not find the frame base for \"%s\".",
|
|
|
|
|
SYMBOL_NATURAL_NAME (framefunc));
|
Based on a patch from Daniel Berlin (dberlin@dberlin.org).
* symtab.h: Add opaque declarations of struct axs_value and
struct agent_expr.
(enum address_class): Add LOC_COMPUTED and LOC_COMPUTED_ARG.
(struct location_funcs): New type.
(struct symbol): Add "loc" to aux_value.
(SYMBOL_LOCATION_BATON, SYMBOL_LOCATION_FUNCS): New macros.
* dwarf2read.c: Include "dwarf2expr.h".
(dwarf2_symbol_mark_computed): New function.
(read_func_scope): Use it.
(var_decode_location): New function.
(new_symbol): Use it.
* dwarf2expr.c, dwarf2expr.h, dwarf2loc.c, dwarf2loc.h: New files.
* Makefile.in (SFILES): Add dwarf2loc.c and dwarf2expr.c.
(dwarf2expr_h, dwarf2loc_h): New variables.
(COMMON_OBS): Add dwarf2expr.o and dwarf2loc.o.
(dwarf2expr.o, dwarf2loc.o): New rules.
(dwarf2read.o): Add $(dwarf2expr_h) and $(dwarf2loc_h).
* buildsym.c (finish_block): Handle LOC_COMPUTED and
LOC_COMPUTED_ARG.
* findvar.c (symbol_read_needs_frame, read_var_value): Likewise.
* m2-exp.y (yylex): Likewise.
* printcmd.c (address_info, print_frame_args): Likewise.
* stack.c (print_block_frame_locals, print_frame_arg_vars): Likewise.
* symmisc.c (print_symbol, print_partial_symbols): Likewise.
* ada-lang.c (ada_resolve_subexp, symtab_for_sym)
(ada_add_block_symbols, fill_in_ada_prototype): Likewise.
* symtab.c (lookup_block_symbol): Likewise.
2003-02-21 15:24:18 +00:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Using the objfile specified in BATON, find the address for the
|
|
|
|
|
current thread's thread-local storage with offset OFFSET. */
|
|
|
|
|
static CORE_ADDR
|
|
|
|
|
dwarf_expr_tls_address (void *baton, CORE_ADDR offset)
|
|
|
|
|
{
|
|
|
|
|
struct dwarf_expr_baton *debaton = (struct dwarf_expr_baton *) baton;
|
|
|
|
|
CORE_ADDR addr;
|
|
|
|
|
|
|
|
|
|
if (target_get_thread_local_address_p ())
|
|
|
|
|
addr = target_get_thread_local_address (inferior_ptid,
|
|
|
|
|
debaton->objfile,
|
|
|
|
|
offset);
|
2003-07-22 15:41:59 +00:00
|
|
|
|
/* It wouldn't be wrong here to try a gdbarch method, too; finding
|
|
|
|
|
TLS is an ABI-specific thing. But we don't do that yet. */
|
Based on a patch from Daniel Berlin (dberlin@dberlin.org).
* symtab.h: Add opaque declarations of struct axs_value and
struct agent_expr.
(enum address_class): Add LOC_COMPUTED and LOC_COMPUTED_ARG.
(struct location_funcs): New type.
(struct symbol): Add "loc" to aux_value.
(SYMBOL_LOCATION_BATON, SYMBOL_LOCATION_FUNCS): New macros.
* dwarf2read.c: Include "dwarf2expr.h".
(dwarf2_symbol_mark_computed): New function.
(read_func_scope): Use it.
(var_decode_location): New function.
(new_symbol): Use it.
* dwarf2expr.c, dwarf2expr.h, dwarf2loc.c, dwarf2loc.h: New files.
* Makefile.in (SFILES): Add dwarf2loc.c and dwarf2expr.c.
(dwarf2expr_h, dwarf2loc_h): New variables.
(COMMON_OBS): Add dwarf2expr.o and dwarf2loc.o.
(dwarf2expr.o, dwarf2loc.o): New rules.
(dwarf2read.o): Add $(dwarf2expr_h) and $(dwarf2loc_h).
* buildsym.c (finish_block): Handle LOC_COMPUTED and
LOC_COMPUTED_ARG.
* findvar.c (symbol_read_needs_frame, read_var_value): Likewise.
* m2-exp.y (yylex): Likewise.
* printcmd.c (address_info, print_frame_args): Likewise.
* stack.c (print_block_frame_locals, print_frame_arg_vars): Likewise.
* symmisc.c (print_symbol, print_partial_symbols): Likewise.
* ada-lang.c (ada_resolve_subexp, symtab_for_sym)
(ada_add_block_symbols, fill_in_ada_prototype): Likewise.
* symtab.c (lookup_block_symbol): Likewise.
2003-02-21 15:24:18 +00:00
|
|
|
|
else
|
|
|
|
|
error ("Cannot find thread-local variables on this target");
|
|
|
|
|
|
|
|
|
|
return addr;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Evaluate a location description, starting at DATA and with length
|
|
|
|
|
SIZE, to find the current location of variable VAR in the context
|
|
|
|
|
of FRAME. */
|
|
|
|
|
static struct value *
|
|
|
|
|
dwarf2_evaluate_loc_desc (struct symbol *var, struct frame_info *frame,
|
|
|
|
|
unsigned char *data, unsigned short size,
|
|
|
|
|
struct objfile *objfile)
|
|
|
|
|
{
|
|
|
|
|
CORE_ADDR result;
|
|
|
|
|
struct value *retval;
|
|
|
|
|
struct dwarf_expr_baton baton;
|
|
|
|
|
struct dwarf_expr_context *ctx;
|
|
|
|
|
|
2003-04-13 15:43:35 +00:00
|
|
|
|
if (size == 0)
|
|
|
|
|
{
|
|
|
|
|
retval = allocate_value (SYMBOL_TYPE (var));
|
|
|
|
|
VALUE_LVAL (retval) = not_lval;
|
|
|
|
|
VALUE_OPTIMIZED_OUT (retval) = 1;
|
|
|
|
|
}
|
|
|
|
|
|
Based on a patch from Daniel Berlin (dberlin@dberlin.org).
* symtab.h: Add opaque declarations of struct axs_value and
struct agent_expr.
(enum address_class): Add LOC_COMPUTED and LOC_COMPUTED_ARG.
(struct location_funcs): New type.
(struct symbol): Add "loc" to aux_value.
(SYMBOL_LOCATION_BATON, SYMBOL_LOCATION_FUNCS): New macros.
* dwarf2read.c: Include "dwarf2expr.h".
(dwarf2_symbol_mark_computed): New function.
(read_func_scope): Use it.
(var_decode_location): New function.
(new_symbol): Use it.
* dwarf2expr.c, dwarf2expr.h, dwarf2loc.c, dwarf2loc.h: New files.
* Makefile.in (SFILES): Add dwarf2loc.c and dwarf2expr.c.
(dwarf2expr_h, dwarf2loc_h): New variables.
(COMMON_OBS): Add dwarf2expr.o and dwarf2loc.o.
(dwarf2expr.o, dwarf2loc.o): New rules.
(dwarf2read.o): Add $(dwarf2expr_h) and $(dwarf2loc_h).
* buildsym.c (finish_block): Handle LOC_COMPUTED and
LOC_COMPUTED_ARG.
* findvar.c (symbol_read_needs_frame, read_var_value): Likewise.
* m2-exp.y (yylex): Likewise.
* printcmd.c (address_info, print_frame_args): Likewise.
* stack.c (print_block_frame_locals, print_frame_arg_vars): Likewise.
* symmisc.c (print_symbol, print_partial_symbols): Likewise.
* ada-lang.c (ada_resolve_subexp, symtab_for_sym)
(ada_add_block_symbols, fill_in_ada_prototype): Likewise.
* symtab.c (lookup_block_symbol): Likewise.
2003-02-21 15:24:18 +00:00
|
|
|
|
baton.frame = frame;
|
|
|
|
|
baton.objfile = objfile;
|
|
|
|
|
|
|
|
|
|
ctx = new_dwarf_expr_context ();
|
|
|
|
|
ctx->baton = &baton;
|
|
|
|
|
ctx->read_reg = dwarf_expr_read_reg;
|
|
|
|
|
ctx->read_mem = dwarf_expr_read_mem;
|
|
|
|
|
ctx->get_frame_base = dwarf_expr_frame_base;
|
|
|
|
|
ctx->get_tls_address = dwarf_expr_tls_address;
|
|
|
|
|
|
|
|
|
|
dwarf_expr_eval (ctx, data, size);
|
2003-04-13 15:53:44 +00:00
|
|
|
|
result = dwarf_expr_fetch (ctx, 0);
|
Based on a patch from Daniel Berlin (dberlin@dberlin.org).
* symtab.h: Add opaque declarations of struct axs_value and
struct agent_expr.
(enum address_class): Add LOC_COMPUTED and LOC_COMPUTED_ARG.
(struct location_funcs): New type.
(struct symbol): Add "loc" to aux_value.
(SYMBOL_LOCATION_BATON, SYMBOL_LOCATION_FUNCS): New macros.
* dwarf2read.c: Include "dwarf2expr.h".
(dwarf2_symbol_mark_computed): New function.
(read_func_scope): Use it.
(var_decode_location): New function.
(new_symbol): Use it.
* dwarf2expr.c, dwarf2expr.h, dwarf2loc.c, dwarf2loc.h: New files.
* Makefile.in (SFILES): Add dwarf2loc.c and dwarf2expr.c.
(dwarf2expr_h, dwarf2loc_h): New variables.
(COMMON_OBS): Add dwarf2expr.o and dwarf2loc.o.
(dwarf2expr.o, dwarf2loc.o): New rules.
(dwarf2read.o): Add $(dwarf2expr_h) and $(dwarf2loc_h).
* buildsym.c (finish_block): Handle LOC_COMPUTED and
LOC_COMPUTED_ARG.
* findvar.c (symbol_read_needs_frame, read_var_value): Likewise.
* m2-exp.y (yylex): Likewise.
* printcmd.c (address_info, print_frame_args): Likewise.
* stack.c (print_block_frame_locals, print_frame_arg_vars): Likewise.
* symmisc.c (print_symbol, print_partial_symbols): Likewise.
* ada-lang.c (ada_resolve_subexp, symtab_for_sym)
(ada_add_block_symbols, fill_in_ada_prototype): Likewise.
* symtab.c (lookup_block_symbol): Likewise.
2003-02-21 15:24:18 +00:00
|
|
|
|
|
|
|
|
|
if (ctx->in_reg)
|
2003-04-22 23:18:26 +00:00
|
|
|
|
{
|
|
|
|
|
int regnum = DWARF2_REG_TO_REGNUM (result);
|
|
|
|
|
retval = value_from_register (SYMBOL_TYPE (var), regnum, frame);
|
|
|
|
|
}
|
Based on a patch from Daniel Berlin (dberlin@dberlin.org).
* symtab.h: Add opaque declarations of struct axs_value and
struct agent_expr.
(enum address_class): Add LOC_COMPUTED and LOC_COMPUTED_ARG.
(struct location_funcs): New type.
(struct symbol): Add "loc" to aux_value.
(SYMBOL_LOCATION_BATON, SYMBOL_LOCATION_FUNCS): New macros.
* dwarf2read.c: Include "dwarf2expr.h".
(dwarf2_symbol_mark_computed): New function.
(read_func_scope): Use it.
(var_decode_location): New function.
(new_symbol): Use it.
* dwarf2expr.c, dwarf2expr.h, dwarf2loc.c, dwarf2loc.h: New files.
* Makefile.in (SFILES): Add dwarf2loc.c and dwarf2expr.c.
(dwarf2expr_h, dwarf2loc_h): New variables.
(COMMON_OBS): Add dwarf2expr.o and dwarf2loc.o.
(dwarf2expr.o, dwarf2loc.o): New rules.
(dwarf2read.o): Add $(dwarf2expr_h) and $(dwarf2loc_h).
* buildsym.c (finish_block): Handle LOC_COMPUTED and
LOC_COMPUTED_ARG.
* findvar.c (symbol_read_needs_frame, read_var_value): Likewise.
* m2-exp.y (yylex): Likewise.
* printcmd.c (address_info, print_frame_args): Likewise.
* stack.c (print_block_frame_locals, print_frame_arg_vars): Likewise.
* symmisc.c (print_symbol, print_partial_symbols): Likewise.
* ada-lang.c (ada_resolve_subexp, symtab_for_sym)
(ada_add_block_symbols, fill_in_ada_prototype): Likewise.
* symtab.c (lookup_block_symbol): Likewise.
2003-02-21 15:24:18 +00:00
|
|
|
|
else
|
|
|
|
|
{
|
2003-04-13 15:53:44 +00:00
|
|
|
|
retval = allocate_value (SYMBOL_TYPE (var));
|
|
|
|
|
VALUE_BFD_SECTION (retval) = SYMBOL_BFD_SECTION (var);
|
|
|
|
|
|
Based on a patch from Daniel Berlin (dberlin@dberlin.org).
* symtab.h: Add opaque declarations of struct axs_value and
struct agent_expr.
(enum address_class): Add LOC_COMPUTED and LOC_COMPUTED_ARG.
(struct location_funcs): New type.
(struct symbol): Add "loc" to aux_value.
(SYMBOL_LOCATION_BATON, SYMBOL_LOCATION_FUNCS): New macros.
* dwarf2read.c: Include "dwarf2expr.h".
(dwarf2_symbol_mark_computed): New function.
(read_func_scope): Use it.
(var_decode_location): New function.
(new_symbol): Use it.
* dwarf2expr.c, dwarf2expr.h, dwarf2loc.c, dwarf2loc.h: New files.
* Makefile.in (SFILES): Add dwarf2loc.c and dwarf2expr.c.
(dwarf2expr_h, dwarf2loc_h): New variables.
(COMMON_OBS): Add dwarf2expr.o and dwarf2loc.o.
(dwarf2expr.o, dwarf2loc.o): New rules.
(dwarf2read.o): Add $(dwarf2expr_h) and $(dwarf2loc_h).
* buildsym.c (finish_block): Handle LOC_COMPUTED and
LOC_COMPUTED_ARG.
* findvar.c (symbol_read_needs_frame, read_var_value): Likewise.
* m2-exp.y (yylex): Likewise.
* printcmd.c (address_info, print_frame_args): Likewise.
* stack.c (print_block_frame_locals, print_frame_arg_vars): Likewise.
* symmisc.c (print_symbol, print_partial_symbols): Likewise.
* ada-lang.c (ada_resolve_subexp, symtab_for_sym)
(ada_add_block_symbols, fill_in_ada_prototype): Likewise.
* symtab.c (lookup_block_symbol): Likewise.
2003-02-21 15:24:18 +00:00
|
|
|
|
VALUE_LVAL (retval) = lval_memory;
|
|
|
|
|
VALUE_LAZY (retval) = 1;
|
|
|
|
|
VALUE_ADDRESS (retval) = result;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
free_dwarf_expr_context (ctx);
|
|
|
|
|
|
|
|
|
|
return retval;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* Helper functions and baton for dwarf2_loc_desc_needs_frame. */
|
|
|
|
|
|
|
|
|
|
struct needs_frame_baton
|
|
|
|
|
{
|
|
|
|
|
int needs_frame;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/* Reads from registers do require a frame. */
|
|
|
|
|
static CORE_ADDR
|
2003-04-13 15:53:44 +00:00
|
|
|
|
needs_frame_read_reg (void *baton, int regnum)
|
Based on a patch from Daniel Berlin (dberlin@dberlin.org).
* symtab.h: Add opaque declarations of struct axs_value and
struct agent_expr.
(enum address_class): Add LOC_COMPUTED and LOC_COMPUTED_ARG.
(struct location_funcs): New type.
(struct symbol): Add "loc" to aux_value.
(SYMBOL_LOCATION_BATON, SYMBOL_LOCATION_FUNCS): New macros.
* dwarf2read.c: Include "dwarf2expr.h".
(dwarf2_symbol_mark_computed): New function.
(read_func_scope): Use it.
(var_decode_location): New function.
(new_symbol): Use it.
* dwarf2expr.c, dwarf2expr.h, dwarf2loc.c, dwarf2loc.h: New files.
* Makefile.in (SFILES): Add dwarf2loc.c and dwarf2expr.c.
(dwarf2expr_h, dwarf2loc_h): New variables.
(COMMON_OBS): Add dwarf2expr.o and dwarf2loc.o.
(dwarf2expr.o, dwarf2loc.o): New rules.
(dwarf2read.o): Add $(dwarf2expr_h) and $(dwarf2loc_h).
* buildsym.c (finish_block): Handle LOC_COMPUTED and
LOC_COMPUTED_ARG.
* findvar.c (symbol_read_needs_frame, read_var_value): Likewise.
* m2-exp.y (yylex): Likewise.
* printcmd.c (address_info, print_frame_args): Likewise.
* stack.c (print_block_frame_locals, print_frame_arg_vars): Likewise.
* symmisc.c (print_symbol, print_partial_symbols): Likewise.
* ada-lang.c (ada_resolve_subexp, symtab_for_sym)
(ada_add_block_symbols, fill_in_ada_prototype): Likewise.
* symtab.c (lookup_block_symbol): Likewise.
2003-02-21 15:24:18 +00:00
|
|
|
|
{
|
|
|
|
|
struct needs_frame_baton *nf_baton = baton;
|
|
|
|
|
nf_baton->needs_frame = 1;
|
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Reads from memory do not require a frame. */
|
|
|
|
|
static void
|
|
|
|
|
needs_frame_read_mem (void *baton, char *buf, CORE_ADDR addr, size_t len)
|
|
|
|
|
{
|
|
|
|
|
memset (buf, 0, len);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Frame-relative accesses do require a frame. */
|
|
|
|
|
static void
|
|
|
|
|
needs_frame_frame_base (void *baton, unsigned char **start, size_t * length)
|
|
|
|
|
{
|
|
|
|
|
static char lit0 = DW_OP_lit0;
|
|
|
|
|
struct needs_frame_baton *nf_baton = baton;
|
|
|
|
|
|
|
|
|
|
*start = &lit0;
|
|
|
|
|
*length = 1;
|
|
|
|
|
|
|
|
|
|
nf_baton->needs_frame = 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Thread-local accesses do require a frame. */
|
|
|
|
|
static CORE_ADDR
|
|
|
|
|
needs_frame_tls_address (void *baton, CORE_ADDR offset)
|
|
|
|
|
{
|
|
|
|
|
struct needs_frame_baton *nf_baton = baton;
|
|
|
|
|
nf_baton->needs_frame = 1;
|
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Return non-zero iff the location expression at DATA (length SIZE)
|
|
|
|
|
requires a frame to evaluate. */
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
dwarf2_loc_desc_needs_frame (unsigned char *data, unsigned short size)
|
|
|
|
|
{
|
|
|
|
|
struct needs_frame_baton baton;
|
|
|
|
|
struct dwarf_expr_context *ctx;
|
|
|
|
|
|
|
|
|
|
baton.needs_frame = 0;
|
|
|
|
|
|
|
|
|
|
ctx = new_dwarf_expr_context ();
|
|
|
|
|
ctx->baton = &baton;
|
|
|
|
|
ctx->read_reg = needs_frame_read_reg;
|
|
|
|
|
ctx->read_mem = needs_frame_read_mem;
|
|
|
|
|
ctx->get_frame_base = needs_frame_frame_base;
|
|
|
|
|
ctx->get_tls_address = needs_frame_tls_address;
|
|
|
|
|
|
|
|
|
|
dwarf_expr_eval (ctx, data, size);
|
|
|
|
|
|
|
|
|
|
free_dwarf_expr_context (ctx);
|
|
|
|
|
|
|
|
|
|
return baton.needs_frame;
|
|
|
|
|
}
|
|
|
|
|
|
2003-04-13 15:43:35 +00:00
|
|
|
|
static void
|
|
|
|
|
dwarf2_tracepoint_var_ref (struct symbol * symbol, struct agent_expr * ax,
|
|
|
|
|
struct axs_value * value, unsigned char *data,
|
|
|
|
|
int size)
|
|
|
|
|
{
|
|
|
|
|
if (size == 0)
|
|
|
|
|
error ("Symbol \"%s\" has been optimized out.",
|
|
|
|
|
SYMBOL_PRINT_NAME (symbol));
|
|
|
|
|
|
|
|
|
|
if (size == 1
|
|
|
|
|
&& data[0] >= DW_OP_reg0
|
|
|
|
|
&& data[0] <= DW_OP_reg31)
|
|
|
|
|
{
|
|
|
|
|
value->kind = axs_lvalue_register;
|
|
|
|
|
value->u.reg = data[0] - DW_OP_reg0;
|
|
|
|
|
}
|
|
|
|
|
else if (data[0] == DW_OP_regx)
|
|
|
|
|
{
|
|
|
|
|
ULONGEST reg;
|
|
|
|
|
read_uleb128 (data + 1, data + size, ®);
|
|
|
|
|
value->kind = axs_lvalue_register;
|
|
|
|
|
value->u.reg = reg;
|
|
|
|
|
}
|
|
|
|
|
else if (data[0] == DW_OP_fbreg)
|
|
|
|
|
{
|
|
|
|
|
/* And this is worse than just minimal; we should honor the frame base
|
|
|
|
|
as above. */
|
|
|
|
|
int frame_reg;
|
|
|
|
|
LONGEST frame_offset;
|
|
|
|
|
unsigned char *buf_end;
|
|
|
|
|
|
|
|
|
|
buf_end = read_sleb128 (data + 1, data + size, &frame_offset);
|
|
|
|
|
if (buf_end != data + size)
|
|
|
|
|
error ("Unexpected opcode after DW_OP_fbreg for symbol \"%s\".",
|
|
|
|
|
SYMBOL_PRINT_NAME (symbol));
|
Based on a patch from Daniel Berlin (dberlin@dberlin.org).
* symtab.h: Add opaque declarations of struct axs_value and
struct agent_expr.
(enum address_class): Add LOC_COMPUTED and LOC_COMPUTED_ARG.
(struct location_funcs): New type.
(struct symbol): Add "loc" to aux_value.
(SYMBOL_LOCATION_BATON, SYMBOL_LOCATION_FUNCS): New macros.
* dwarf2read.c: Include "dwarf2expr.h".
(dwarf2_symbol_mark_computed): New function.
(read_func_scope): Use it.
(var_decode_location): New function.
(new_symbol): Use it.
* dwarf2expr.c, dwarf2expr.h, dwarf2loc.c, dwarf2loc.h: New files.
* Makefile.in (SFILES): Add dwarf2loc.c and dwarf2expr.c.
(dwarf2expr_h, dwarf2loc_h): New variables.
(COMMON_OBS): Add dwarf2expr.o and dwarf2loc.o.
(dwarf2expr.o, dwarf2loc.o): New rules.
(dwarf2read.o): Add $(dwarf2expr_h) and $(dwarf2loc_h).
* buildsym.c (finish_block): Handle LOC_COMPUTED and
LOC_COMPUTED_ARG.
* findvar.c (symbol_read_needs_frame, read_var_value): Likewise.
* m2-exp.y (yylex): Likewise.
* printcmd.c (address_info, print_frame_args): Likewise.
* stack.c (print_block_frame_locals, print_frame_arg_vars): Likewise.
* symmisc.c (print_symbol, print_partial_symbols): Likewise.
* ada-lang.c (ada_resolve_subexp, symtab_for_sym)
(ada_add_block_symbols, fill_in_ada_prototype): Likewise.
* symtab.c (lookup_block_symbol): Likewise.
2003-02-21 15:24:18 +00:00
|
|
|
|
|
2003-04-13 15:43:35 +00:00
|
|
|
|
TARGET_VIRTUAL_FRAME_POINTER (ax->scope, &frame_reg, &frame_offset);
|
|
|
|
|
ax_reg (ax, frame_reg);
|
|
|
|
|
ax_const_l (ax, frame_offset);
|
|
|
|
|
ax_simple (ax, aop_add);
|
Based on a patch from Daniel Berlin (dberlin@dberlin.org).
* symtab.h: Add opaque declarations of struct axs_value and
struct agent_expr.
(enum address_class): Add LOC_COMPUTED and LOC_COMPUTED_ARG.
(struct location_funcs): New type.
(struct symbol): Add "loc" to aux_value.
(SYMBOL_LOCATION_BATON, SYMBOL_LOCATION_FUNCS): New macros.
* dwarf2read.c: Include "dwarf2expr.h".
(dwarf2_symbol_mark_computed): New function.
(read_func_scope): Use it.
(var_decode_location): New function.
(new_symbol): Use it.
* dwarf2expr.c, dwarf2expr.h, dwarf2loc.c, dwarf2loc.h: New files.
* Makefile.in (SFILES): Add dwarf2loc.c and dwarf2expr.c.
(dwarf2expr_h, dwarf2loc_h): New variables.
(COMMON_OBS): Add dwarf2expr.o and dwarf2loc.o.
(dwarf2expr.o, dwarf2loc.o): New rules.
(dwarf2read.o): Add $(dwarf2expr_h) and $(dwarf2loc_h).
* buildsym.c (finish_block): Handle LOC_COMPUTED and
LOC_COMPUTED_ARG.
* findvar.c (symbol_read_needs_frame, read_var_value): Likewise.
* m2-exp.y (yylex): Likewise.
* printcmd.c (address_info, print_frame_args): Likewise.
* stack.c (print_block_frame_locals, print_frame_arg_vars): Likewise.
* symmisc.c (print_symbol, print_partial_symbols): Likewise.
* ada-lang.c (ada_resolve_subexp, symtab_for_sym)
(ada_add_block_symbols, fill_in_ada_prototype): Likewise.
* symtab.c (lookup_block_symbol): Likewise.
2003-02-21 15:24:18 +00:00
|
|
|
|
|
2003-04-13 15:43:35 +00:00
|
|
|
|
ax_const_l (ax, frame_offset);
|
|
|
|
|
ax_simple (ax, aop_add);
|
|
|
|
|
value->kind = axs_lvalue_memory;
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
error ("Unsupported DWARF opcode in the location of \"%s\".",
|
|
|
|
|
SYMBOL_PRINT_NAME (symbol));
|
|
|
|
|
}
|
Based on a patch from Daniel Berlin (dberlin@dberlin.org).
* symtab.h: Add opaque declarations of struct axs_value and
struct agent_expr.
(enum address_class): Add LOC_COMPUTED and LOC_COMPUTED_ARG.
(struct location_funcs): New type.
(struct symbol): Add "loc" to aux_value.
(SYMBOL_LOCATION_BATON, SYMBOL_LOCATION_FUNCS): New macros.
* dwarf2read.c: Include "dwarf2expr.h".
(dwarf2_symbol_mark_computed): New function.
(read_func_scope): Use it.
(var_decode_location): New function.
(new_symbol): Use it.
* dwarf2expr.c, dwarf2expr.h, dwarf2loc.c, dwarf2loc.h: New files.
* Makefile.in (SFILES): Add dwarf2loc.c and dwarf2expr.c.
(dwarf2expr_h, dwarf2loc_h): New variables.
(COMMON_OBS): Add dwarf2expr.o and dwarf2loc.o.
(dwarf2expr.o, dwarf2loc.o): New rules.
(dwarf2read.o): Add $(dwarf2expr_h) and $(dwarf2loc_h).
* buildsym.c (finish_block): Handle LOC_COMPUTED and
LOC_COMPUTED_ARG.
* findvar.c (symbol_read_needs_frame, read_var_value): Likewise.
* m2-exp.y (yylex): Likewise.
* printcmd.c (address_info, print_frame_args): Likewise.
* stack.c (print_block_frame_locals, print_frame_arg_vars): Likewise.
* symmisc.c (print_symbol, print_partial_symbols): Likewise.
* ada-lang.c (ada_resolve_subexp, symtab_for_sym)
(ada_add_block_symbols, fill_in_ada_prototype): Likewise.
* symtab.c (lookup_block_symbol): Likewise.
2003-02-21 15:24:18 +00:00
|
|
|
|
|
|
|
|
|
/* Return the value of SYMBOL in FRAME using the DWARF-2 expression
|
|
|
|
|
evaluator to calculate the location. */
|
|
|
|
|
static struct value *
|
|
|
|
|
locexpr_read_variable (struct symbol *symbol, struct frame_info *frame)
|
|
|
|
|
{
|
|
|
|
|
struct dwarf2_locexpr_baton *dlbaton = SYMBOL_LOCATION_BATON (symbol);
|
|
|
|
|
struct value *val;
|
|
|
|
|
val = dwarf2_evaluate_loc_desc (symbol, frame, dlbaton->data, dlbaton->size,
|
|
|
|
|
dlbaton->objfile);
|
|
|
|
|
|
|
|
|
|
return val;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Return non-zero iff we need a frame to evaluate SYMBOL. */
|
|
|
|
|
static int
|
|
|
|
|
locexpr_read_needs_frame (struct symbol *symbol)
|
|
|
|
|
{
|
|
|
|
|
struct dwarf2_locexpr_baton *dlbaton = SYMBOL_LOCATION_BATON (symbol);
|
|
|
|
|
return dwarf2_loc_desc_needs_frame (dlbaton->data, dlbaton->size);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Print a natural-language description of SYMBOL to STREAM. */
|
|
|
|
|
static int
|
|
|
|
|
locexpr_describe_location (struct symbol *symbol, struct ui_file *stream)
|
|
|
|
|
{
|
|
|
|
|
/* FIXME: be more extensive. */
|
|
|
|
|
struct dwarf2_locexpr_baton *dlbaton = SYMBOL_LOCATION_BATON (symbol);
|
|
|
|
|
|
|
|
|
|
if (dlbaton->size == 1
|
|
|
|
|
&& dlbaton->data[0] >= DW_OP_reg0
|
|
|
|
|
&& dlbaton->data[0] <= DW_OP_reg31)
|
|
|
|
|
{
|
|
|
|
|
int regno = DWARF2_REG_TO_REGNUM (dlbaton->data[0] - DW_OP_reg0);
|
|
|
|
|
fprintf_filtered (stream,
|
|
|
|
|
"a variable in register %s", REGISTER_NAME (regno));
|
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
|
2003-07-22 15:41:59 +00:00
|
|
|
|
/* The location expression for a TLS variable looks like this (on a
|
|
|
|
|
64-bit LE machine):
|
|
|
|
|
|
|
|
|
|
DW_AT_location : 10 byte block: 3 4 0 0 0 0 0 0 0 e0
|
|
|
|
|
(DW_OP_addr: 4; DW_OP_GNU_push_tls_address)
|
|
|
|
|
|
|
|
|
|
0x3 is the encoding for DW_OP_addr, which has an operand as long
|
|
|
|
|
as the size of an address on the target machine (here is 8
|
|
|
|
|
bytes). 0xe0 is the encoding for DW_OP_GNU_push_tls_address.
|
|
|
|
|
The operand represents the offset at which the variable is within
|
|
|
|
|
the thread local storage. */
|
|
|
|
|
|
|
|
|
|
if (dlbaton->size > 1
|
|
|
|
|
&& dlbaton->data[dlbaton->size - 1] == DW_OP_GNU_push_tls_address)
|
|
|
|
|
if (dlbaton->data[0] == DW_OP_addr)
|
|
|
|
|
{
|
|
|
|
|
int bytes_read;
|
|
|
|
|
CORE_ADDR offset = dwarf2_read_address (&dlbaton->data[1],
|
2003-07-22 18:16:05 +00:00
|
|
|
|
&dlbaton->data[dlbaton->size - 1],
|
2003-07-22 15:41:59 +00:00
|
|
|
|
&bytes_read);
|
|
|
|
|
fprintf_filtered (stream,
|
2003-07-22 18:24:42 +00:00
|
|
|
|
"a thread-local variable at offset %s in the "
|
2003-07-22 15:41:59 +00:00
|
|
|
|
"thread-local storage for `%s'",
|
|
|
|
|
paddr_nz (offset), dlbaton->objfile->name);
|
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
Based on a patch from Daniel Berlin (dberlin@dberlin.org).
* symtab.h: Add opaque declarations of struct axs_value and
struct agent_expr.
(enum address_class): Add LOC_COMPUTED and LOC_COMPUTED_ARG.
(struct location_funcs): New type.
(struct symbol): Add "loc" to aux_value.
(SYMBOL_LOCATION_BATON, SYMBOL_LOCATION_FUNCS): New macros.
* dwarf2read.c: Include "dwarf2expr.h".
(dwarf2_symbol_mark_computed): New function.
(read_func_scope): Use it.
(var_decode_location): New function.
(new_symbol): Use it.
* dwarf2expr.c, dwarf2expr.h, dwarf2loc.c, dwarf2loc.h: New files.
* Makefile.in (SFILES): Add dwarf2loc.c and dwarf2expr.c.
(dwarf2expr_h, dwarf2loc_h): New variables.
(COMMON_OBS): Add dwarf2expr.o and dwarf2loc.o.
(dwarf2expr.o, dwarf2loc.o): New rules.
(dwarf2read.o): Add $(dwarf2expr_h) and $(dwarf2loc_h).
* buildsym.c (finish_block): Handle LOC_COMPUTED and
LOC_COMPUTED_ARG.
* findvar.c (symbol_read_needs_frame, read_var_value): Likewise.
* m2-exp.y (yylex): Likewise.
* printcmd.c (address_info, print_frame_args): Likewise.
* stack.c (print_block_frame_locals, print_frame_arg_vars): Likewise.
* symmisc.c (print_symbol, print_partial_symbols): Likewise.
* ada-lang.c (ada_resolve_subexp, symtab_for_sym)
(ada_add_block_symbols, fill_in_ada_prototype): Likewise.
* symtab.c (lookup_block_symbol): Likewise.
2003-02-21 15:24:18 +00:00
|
|
|
|
fprintf_filtered (stream,
|
|
|
|
|
"a variable with complex or multiple locations (DWARF2)");
|
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
|
2003-02-28 20:03:18 +00:00
|
|
|
|
|
|
|
|
|
/* Describe the location of SYMBOL as an agent value in VALUE, generating
|
|
|
|
|
any necessary bytecode in AX.
|
|
|
|
|
|
|
|
|
|
NOTE drow/2003-02-26: This function is extremely minimal, because
|
|
|
|
|
doing it correctly is extremely complicated and there is no
|
|
|
|
|
publicly available stub with tracepoint support for me to test
|
|
|
|
|
against. When there is one this function should be revisited. */
|
|
|
|
|
|
2003-04-13 15:43:35 +00:00
|
|
|
|
static void
|
2003-02-28 20:03:18 +00:00
|
|
|
|
locexpr_tracepoint_var_ref (struct symbol * symbol, struct agent_expr * ax,
|
|
|
|
|
struct axs_value * value)
|
|
|
|
|
{
|
|
|
|
|
struct dwarf2_locexpr_baton *dlbaton = SYMBOL_LOCATION_BATON (symbol);
|
|
|
|
|
|
2003-04-13 15:43:35 +00:00
|
|
|
|
dwarf2_tracepoint_var_ref (symbol, ax, value, dlbaton->data, dlbaton->size);
|
2003-02-28 20:03:18 +00:00
|
|
|
|
}
|
|
|
|
|
|
Based on a patch from Daniel Berlin (dberlin@dberlin.org).
* symtab.h: Add opaque declarations of struct axs_value and
struct agent_expr.
(enum address_class): Add LOC_COMPUTED and LOC_COMPUTED_ARG.
(struct location_funcs): New type.
(struct symbol): Add "loc" to aux_value.
(SYMBOL_LOCATION_BATON, SYMBOL_LOCATION_FUNCS): New macros.
* dwarf2read.c: Include "dwarf2expr.h".
(dwarf2_symbol_mark_computed): New function.
(read_func_scope): Use it.
(var_decode_location): New function.
(new_symbol): Use it.
* dwarf2expr.c, dwarf2expr.h, dwarf2loc.c, dwarf2loc.h: New files.
* Makefile.in (SFILES): Add dwarf2loc.c and dwarf2expr.c.
(dwarf2expr_h, dwarf2loc_h): New variables.
(COMMON_OBS): Add dwarf2expr.o and dwarf2loc.o.
(dwarf2expr.o, dwarf2loc.o): New rules.
(dwarf2read.o): Add $(dwarf2expr_h) and $(dwarf2loc_h).
* buildsym.c (finish_block): Handle LOC_COMPUTED and
LOC_COMPUTED_ARG.
* findvar.c (symbol_read_needs_frame, read_var_value): Likewise.
* m2-exp.y (yylex): Likewise.
* printcmd.c (address_info, print_frame_args): Likewise.
* stack.c (print_block_frame_locals, print_frame_arg_vars): Likewise.
* symmisc.c (print_symbol, print_partial_symbols): Likewise.
* ada-lang.c (ada_resolve_subexp, symtab_for_sym)
(ada_add_block_symbols, fill_in_ada_prototype): Likewise.
* symtab.c (lookup_block_symbol): Likewise.
2003-02-21 15:24:18 +00:00
|
|
|
|
/* The set of location functions used with the DWARF-2 expression
|
|
|
|
|
evaluator. */
|
|
|
|
|
struct location_funcs dwarf2_locexpr_funcs = {
|
|
|
|
|
locexpr_read_variable,
|
|
|
|
|
locexpr_read_needs_frame,
|
|
|
|
|
locexpr_describe_location,
|
2003-02-28 20:03:18 +00:00
|
|
|
|
locexpr_tracepoint_var_ref
|
Based on a patch from Daniel Berlin (dberlin@dberlin.org).
* symtab.h: Add opaque declarations of struct axs_value and
struct agent_expr.
(enum address_class): Add LOC_COMPUTED and LOC_COMPUTED_ARG.
(struct location_funcs): New type.
(struct symbol): Add "loc" to aux_value.
(SYMBOL_LOCATION_BATON, SYMBOL_LOCATION_FUNCS): New macros.
* dwarf2read.c: Include "dwarf2expr.h".
(dwarf2_symbol_mark_computed): New function.
(read_func_scope): Use it.
(var_decode_location): New function.
(new_symbol): Use it.
* dwarf2expr.c, dwarf2expr.h, dwarf2loc.c, dwarf2loc.h: New files.
* Makefile.in (SFILES): Add dwarf2loc.c and dwarf2expr.c.
(dwarf2expr_h, dwarf2loc_h): New variables.
(COMMON_OBS): Add dwarf2expr.o and dwarf2loc.o.
(dwarf2expr.o, dwarf2loc.o): New rules.
(dwarf2read.o): Add $(dwarf2expr_h) and $(dwarf2loc_h).
* buildsym.c (finish_block): Handle LOC_COMPUTED and
LOC_COMPUTED_ARG.
* findvar.c (symbol_read_needs_frame, read_var_value): Likewise.
* m2-exp.y (yylex): Likewise.
* printcmd.c (address_info, print_frame_args): Likewise.
* stack.c (print_block_frame_locals, print_frame_arg_vars): Likewise.
* symmisc.c (print_symbol, print_partial_symbols): Likewise.
* ada-lang.c (ada_resolve_subexp, symtab_for_sym)
(ada_add_block_symbols, fill_in_ada_prototype): Likewise.
* symtab.c (lookup_block_symbol): Likewise.
2003-02-21 15:24:18 +00:00
|
|
|
|
};
|
2003-04-13 15:43:35 +00:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* Wrapper functions for location lists. These generally find
|
|
|
|
|
the appropriate location expression and call something above. */
|
|
|
|
|
|
|
|
|
|
/* Return the value of SYMBOL in FRAME using the DWARF-2 expression
|
|
|
|
|
evaluator to calculate the location. */
|
|
|
|
|
static struct value *
|
|
|
|
|
loclist_read_variable (struct symbol *symbol, struct frame_info *frame)
|
|
|
|
|
{
|
|
|
|
|
struct dwarf2_loclist_baton *dlbaton = SYMBOL_LOCATION_BATON (symbol);
|
|
|
|
|
struct value *val;
|
|
|
|
|
unsigned char *data;
|
2003-05-18 15:49:51 +00:00
|
|
|
|
size_t size;
|
2003-04-13 15:43:35 +00:00
|
|
|
|
|
|
|
|
|
data = find_location_expression (dlbaton, &size,
|
|
|
|
|
frame ? get_frame_pc (frame) : 0);
|
|
|
|
|
if (data == NULL)
|
|
|
|
|
error ("Variable \"%s\" is not available.", SYMBOL_NATURAL_NAME (symbol));
|
|
|
|
|
|
|
|
|
|
val = dwarf2_evaluate_loc_desc (symbol, frame, data, size, dlbaton->objfile);
|
|
|
|
|
|
|
|
|
|
return val;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Return non-zero iff we need a frame to evaluate SYMBOL. */
|
|
|
|
|
static int
|
|
|
|
|
loclist_read_needs_frame (struct symbol *symbol)
|
|
|
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{
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|
|
|
/* If there's a location list, then assume we need to have a frame
|
|
|
|
|
to choose the appropriate location expression. With tracking of
|
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|
|
|
global variables this is not necessarily true, but such tracking
|
|
|
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|
is disabled in GCC at the moment until we figure out how to
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|
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|
represent it. */
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|
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return 1;
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|
|
|
|
}
|
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|
|
/* Print a natural-language description of SYMBOL to STREAM. */
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|
|
|
|
static int
|
|
|
|
|
loclist_describe_location (struct symbol *symbol, struct ui_file *stream)
|
|
|
|
|
{
|
|
|
|
|
/* FIXME: Could print the entire list of locations. */
|
|
|
|
|
fprintf_filtered (stream, "a variable with multiple locations");
|
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
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|
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|
|
|
|
/* Describe the location of SYMBOL as an agent value in VALUE, generating
|
|
|
|
|
any necessary bytecode in AX. */
|
|
|
|
|
static void
|
|
|
|
|
loclist_tracepoint_var_ref (struct symbol * symbol, struct agent_expr * ax,
|
|
|
|
|
struct axs_value * value)
|
|
|
|
|
{
|
|
|
|
|
struct dwarf2_loclist_baton *dlbaton = SYMBOL_LOCATION_BATON (symbol);
|
|
|
|
|
unsigned char *data;
|
2003-05-18 15:49:51 +00:00
|
|
|
|
size_t size;
|
2003-04-13 15:43:35 +00:00
|
|
|
|
|
|
|
|
|
data = find_location_expression (dlbaton, &size, ax->scope);
|
|
|
|
|
if (data == NULL)
|
|
|
|
|
error ("Variable \"%s\" is not available.", SYMBOL_NATURAL_NAME (symbol));
|
|
|
|
|
|
|
|
|
|
dwarf2_tracepoint_var_ref (symbol, ax, value, data, size);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* The set of location functions used with the DWARF-2 expression
|
|
|
|
|
evaluator and location lists. */
|
|
|
|
|
struct location_funcs dwarf2_loclist_funcs = {
|
|
|
|
|
loclist_read_variable,
|
|
|
|
|
loclist_read_needs_frame,
|
|
|
|
|
loclist_describe_location,
|
|
|
|
|
loclist_tracepoint_var_ref
|
|
|
|
|
};
|