/* DWARF 2 location expression support for GDB.
- Copyright 2003 Free Software Foundation, Inc.
+
+ Copyright 2003, 2005 Free Software Foundation, Inc.
+
Contributed by Daniel Jacobowitz, MontaVista Software, Inc.
This file is part of GDB.
#include "ax-gdb.h"
#include "regcache.h"
#include "objfiles.h"
+#include "exceptions.h"
#include "elf/dwarf2.h"
#include "dwarf2expr.h"
find_location_expression (struct dwarf2_loclist_baton *baton,
size_t *locexpr_length, CORE_ADDR pc)
{
- CORE_ADDR base_address = baton->base_address;
CORE_ADDR low, high;
char *loc_ptr, *buf_end;
unsigned int addr_size = TARGET_ADDR_BIT / TARGET_CHAR_BIT, length;
CORE_ADDR base_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
+ /* Adjust base_address for relocatable objects. */
+ CORE_ADDR base_offset = ANOFFSET (baton->objfile->section_offsets,
+ SECT_OFF_TEXT (baton->objfile));
+ CORE_ADDR base_address = baton->base_address + base_offset;
loc_ptr = baton->data;
buf_end = baton->data + baton->size;
}
if (*start == NULL)
- error ("Could not find the frame base for \"%s\".",
+ error (_("Could not find the frame base for \"%s\"."),
SYMBOL_NATURAL_NAME (framefunc));
}
dwarf_expr_tls_address (void *baton, CORE_ADDR offset)
{
struct dwarf_expr_baton *debaton = (struct dwarf_expr_baton *) baton;
- CORE_ADDR addr;
+ volatile CORE_ADDR addr = 0;
+
+ if (target_get_thread_local_address_p ()
+ && gdbarch_fetch_tls_load_module_address_p (current_gdbarch))
+ {
+ ptid_t ptid = inferior_ptid;
+ struct objfile *objfile = debaton->objfile;
+ volatile struct gdb_exception ex;
- if (target_get_thread_local_address_p ())
- addr = target_get_thread_local_address (inferior_ptid,
- debaton->objfile,
- offset);
+ TRY_CATCH (ex, RETURN_MASK_ALL)
+ {
+ CORE_ADDR lm_addr;
+
+ /* Fetch the load module address for this objfile. */
+ lm_addr = gdbarch_fetch_tls_load_module_address (current_gdbarch,
+ objfile);
+ /* If it's 0, throw the appropriate exception. */
+ if (lm_addr == 0)
+ {
+ struct gdb_exception e
+ = { RETURN_ERROR, TLS_LOAD_MODULE_NOT_FOUND_ERROR, 0 };
+
+ throw_exception (e);
+ }
+
+ addr = target_get_thread_local_address (ptid, lm_addr, offset);
+ }
+ /* If an error occurred, print TLS related messages here. Otherwise,
+ throw the error to some higher catcher. */
+ if (ex.reason < 0)
+ {
+ int objfile_is_library = (objfile->flags & OBJF_SHARED);
+
+ switch (ex.error)
+ {
+ case TLS_NO_LIBRARY_SUPPORT_ERROR:
+ error (_("Cannot find thread-local variables in this thread library."));
+ break;
+ case TLS_LOAD_MODULE_NOT_FOUND_ERROR:
+ if (objfile_is_library)
+ error (_("Cannot find shared library `%s' in dynamic"
+ " linker's load module list"), objfile->name);
+ else
+ error (_("Cannot find executable file `%s' in dynamic"
+ " linker's load module list"), objfile->name);
+ break;
+ case TLS_NOT_ALLOCATED_YET_ERROR:
+ if (objfile_is_library)
+ error (_("The inferior has not yet allocated storage for"
+ " thread-local variables in\n"
+ "the shared library `%s'\n"
+ "for %s"),
+ objfile->name, target_pid_to_str (ptid));
+ else
+ error (_("The inferior has not yet allocated storage for"
+ " thread-local variables in\n"
+ "the executable `%s'\n"
+ "for %s"),
+ objfile->name, target_pid_to_str (ptid));
+ break;
+ case TLS_GENERIC_ERROR:
+ if (objfile_is_library)
+ error (_("Cannot find thread-local storage for %s, "
+ "shared library %s:\n%s"),
+ target_pid_to_str (ptid),
+ objfile->name, ex.message);
+ else
+ error (_("Cannot find thread-local storage for %s, "
+ "executable file %s:\n%s"),
+ target_pid_to_str (ptid),
+ objfile->name, ex.message);
+ break;
+ default:
+ throw_exception (ex);
+ break;
+ }
+ }
+ }
/* 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. */
else
- error ("Cannot find thread-local variables on this target");
+ error (_("Cannot find thread-local variables on this target"));
return addr;
}
unsigned char *data, unsigned short size,
struct objfile *objfile)
{
- CORE_ADDR result;
+ struct gdbarch *arch = get_frame_arch (frame);
struct value *retval;
struct dwarf_expr_baton baton;
struct dwarf_expr_context *ctx;
{
retval = allocate_value (SYMBOL_TYPE (var));
VALUE_LVAL (retval) = not_lval;
- VALUE_OPTIMIZED_OUT (retval) = 1;
+ set_value_optimized_out (retval, 1);
}
baton.frame = frame;
ctx->get_tls_address = dwarf_expr_tls_address;
dwarf_expr_eval (ctx, data, size);
- result = dwarf_expr_fetch (ctx, 0);
-
- if (ctx->in_reg)
+ if (ctx->num_pieces > 0)
+ {
+ /* We haven't implemented splicing together pieces from
+ arbitrary sources yet. */
+ error (_("The value of variable '%s' is distributed across several\n"
+ "locations, and GDB cannot access its value.\n"),
+ SYMBOL_NATURAL_NAME (var));
+ }
+ else if (ctx->in_reg)
{
- int regnum = DWARF2_REG_TO_REGNUM (result);
- retval = value_from_register (SYMBOL_TYPE (var), regnum, frame);
+ CORE_ADDR dwarf_regnum = dwarf_expr_fetch (ctx, 0);
+ int gdb_regnum = DWARF2_REG_TO_REGNUM (dwarf_regnum);
+ retval = value_from_register (SYMBOL_TYPE (var), gdb_regnum, frame);
}
else
{
- retval = allocate_value (SYMBOL_TYPE (var));
- VALUE_BFD_SECTION (retval) = SYMBOL_BFD_SECTION (var);
+ CORE_ADDR address = dwarf_expr_fetch (ctx, 0);
+ retval = allocate_value (SYMBOL_TYPE (var));
VALUE_LVAL (retval) = lval_memory;
- VALUE_LAZY (retval) = 1;
- VALUE_ADDRESS (retval) = result;
+ set_value_lazy (retval, 1);
+ VALUE_ADDRESS (retval) = address;
}
free_dwarf_expr_context (ctx);
in_reg = ctx->in_reg;
+ if (ctx->num_pieces > 0)
+ {
+ int i;
+
+ /* If the location has several pieces, and any of them are in
+ registers, then we will need a frame to fetch them from. */
+ for (i = 0; i < ctx->num_pieces; i++)
+ if (ctx->pieces[i].in_reg)
+ in_reg = 1;
+ }
+
free_dwarf_expr_context (ctx);
return baton.needs_frame || in_reg;
int size)
{
if (size == 0)
- error ("Symbol \"%s\" has been optimized out.",
+ error (_("Symbol \"%s\" has been optimized out."),
SYMBOL_PRINT_NAME (symbol));
if (size == 1
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\".",
+ error (_("Unexpected opcode after DW_OP_fbreg for symbol \"%s\"."),
SYMBOL_PRINT_NAME (symbol));
TARGET_VIRTUAL_FRAME_POINTER (ax->scope, &frame_reg, &frame_offset);
value->kind = axs_lvalue_memory;
}
else
- error ("Unsupported DWARF opcode in the location of \"%s\".",
+ error (_("Unsupported DWARF opcode in the location of \"%s\"."),
SYMBOL_PRINT_NAME (symbol));
}
\f
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);
+ {
+ val = allocate_value (SYMBOL_TYPE (symbol));
+ VALUE_LVAL (val) = not_lval;
+ set_value_optimized_out (val, 1);
+ }
+ else
+ val = dwarf2_evaluate_loc_desc (symbol, frame, data, size,
+ dlbaton->objfile);
return val;
}
data = find_location_expression (dlbaton, &size, ax->scope);
if (data == NULL)
- error ("Variable \"%s\" is not available.", SYMBOL_NATURAL_NAME (symbol));
+ error (_("Variable \"%s\" is not available."), SYMBOL_NATURAL_NAME (symbol));
dwarf2_tracepoint_var_ref (symbol, ax, value, data, size);
}