aboutsummaryrefslogtreecommitdiff
path: root/gdb/mdebugread.c
diff options
context:
space:
mode:
authorPeter Schauer <Peter.Schauer@mytum.de>1995-04-08 09:59:02 +0000
committerPeter Schauer <Peter.Schauer@mytum.de>1995-04-08 09:59:02 +0000
commit41270571562fe1b32a38ba7a49dac8a9e416d1c8 (patch)
tree00fa74fdb9921632aba5fbd09490941ea7c4bf3b /gdb/mdebugread.c
parent6d3055cb47312443549339a6142f090fcf1d5b09 (diff)
downloadgdb-41270571562fe1b32a38ba7a49dac8a9e416d1c8.zip
gdb-41270571562fe1b32a38ba7a49dac8a9e416d1c8.tar.gz
gdb-41270571562fe1b32a38ba7a49dac8a9e416d1c8.tar.bz2
* mdebugread.c (parse_symbol): Use new variable
nodebug_var_symbol_type as type of variables which don't have any ecoff debug info associated with them. (parse_symbol, parse_procedure): Use heuristics to determine if functions were compiled without debugging info and change their type to nodebug_function_symbol_type. (_initialize_mdebugread): Initialize nodebug_*_symbol_type. * source.c (line_info): Clear sal.pc for `info line' without arguments.
Diffstat (limited to 'gdb/mdebugread.c')
-rw-r--r--gdb/mdebugread.c48
1 files changed, 45 insertions, 3 deletions
diff --git a/gdb/mdebugread.c b/gdb/mdebugread.c
index 5cabe8d..7bf8e4f 100644
--- a/gdb/mdebugread.c
+++ b/gdb/mdebugread.c
@@ -278,6 +278,15 @@ static struct type *mdebug_type_fixed_dec;
static struct type *mdebug_type_float_dec;
static struct type *mdebug_type_string;
+/* Types for symbols from files compiled without debugging info. */
+
+static struct type *nodebug_func_symbol_type;
+static struct type *nodebug_var_symbol_type;
+
+/* Nonzero if we have seen ecoff debugging info for a file. */
+
+static int found_ecoff_debugging_info;
+
/* Forward declarations */
static int
@@ -744,9 +753,9 @@ parse_symbol (sh, ax, ext_sh, bigend, section_offsets)
SYMBOL_CLASS (s) = class;
add_symbol (s, b);
- /* Type could be missing in a number of cases */
- if (sh->sc == scUndefined || sh->sc == scNil)
- SYMBOL_TYPE (s) = builtin_type_int; /* undefined? */
+ /* Type could be missing if file is compiled without debugging info. */
+ if (sh->sc == scUndefined || sh->sc == scNil || sh->index == indexNil)
+ SYMBOL_TYPE (s) = nodebug_var_symbol_type;
else
SYMBOL_TYPE (s) = parse_type (cur_fd, ax, sh->index, 0, bigend, name);
/* Value of a data symbol is its memory address */
@@ -754,6 +763,7 @@ parse_symbol (sh, ax, ext_sh, bigend, section_offsets)
case stParam: /* arg to procedure, goes into current block */
max_gdbinfo++;
+ found_ecoff_debugging_info = 1;
top_stack->numargs++;
/* Special GNU C++ name. */
@@ -879,6 +889,7 @@ parse_symbol (sh, ax, ext_sh, bigend, section_offsets)
unknown-type blocks of info about structured data. `type_code'
has been set to the proper TYPE_CODE, if we know it. */
structured_common:
+ found_ecoff_debugging_info = 1;
push_parse_stack ();
top_stack->blocktype = stBlock;
@@ -1101,6 +1112,7 @@ parse_symbol (sh, ax, ext_sh, bigend, section_offsets)
}
case_stBlock_code:
+ found_ecoff_debugging_info = 1;
/* beginnning of (code) block. Value of symbol
is the displacement from procedure start */
push_parse_stack ();
@@ -1247,6 +1259,8 @@ parse_symbol (sh, ax, ext_sh, bigend, section_offsets)
break;
case stTypedef: /* type definition */
+ found_ecoff_debugging_info = 1;
+
/* Typedefs for forward declarations and opaque structs from alpha cc
are handled by cross_ref, skip them. */
if (sh->iss == 0)
@@ -1886,6 +1900,26 @@ parse_procedure (pr, search_symtab, first_off, pst)
e->pdr.regoffset = -4;
}
}
+
+ /* It would be reasonable that functions that have been compiled
+ without debugging info have a btNil type for their return value,
+ and functions that are void and are compiled with debugging info
+ have btVoid.
+ gcc and DEC f77 put out btNil types for both cases, so btNil is mapped
+ to TYPE_CODE_VOID in parse_type to get the `compiled with debugging info'
+ case right.
+ The glevel field in cur_fdr could be used to determine the presence
+ of debugging info, but GCC doesn't always pass the -g switch settings
+ to the assembler and GAS doesn't set the glevel field from the -g switch
+ settings.
+ To work around these problems, the return value type of a TYPE_CODE_VOID
+ function is adjusted accordingly if no debugging info was found in the
+ compilation unit. */
+
+ if (processing_gcc_compilation == 0
+ && found_ecoff_debugging_info == 0
+ && TYPE_CODE (TYPE_TARGET_TYPE (SYMBOL_TYPE (s))) == TYPE_CODE_VOID)
+ SYMBOL_TYPE (s) = nodebug_func_symbol_type;
}
/* Relocate the extra function info pointed to by the symbol table. */
@@ -3226,6 +3260,7 @@ psymtab_to_symtab_1 (pst, filename)
top_stack->cur_type = 0;
top_stack->procadr = 0;
top_stack->numargs = 0;
+ found_ecoff_debugging_info = 0;
if (fh)
{
@@ -4102,4 +4137,11 @@ _initialize_mdebugread ()
TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
0, "floating decimal",
(struct objfile *) NULL);
+
+ nodebug_func_symbol_type = init_type (TYPE_CODE_FUNC, 1, 0,
+ "<function, no debug info>", NULL);
+ TYPE_TARGET_TYPE (nodebug_func_symbol_type) = builtin_type_int;
+ nodebug_var_symbol_type =
+ init_type (TYPE_CODE_INT, TARGET_INT_BIT / HOST_CHAR_BIT, 0,
+ "<variable, no debug info>", NULL);
}