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* symtab.c (find_addr_symbol): New routine that will find the nearest 

symbol associated with an address.  It does so by exhaustive
search of the symtabs, so it's slow but complete.
This commit is contained in:
John Gilmore 1994-01-12 08:18:55 +00:00
parent 011d4ed95f
commit e0ea0fbd41
2 changed files with 71 additions and 0 deletions
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6
gdb/ChangeLog
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@ -1,3 +1,9 @@
Wed Jan 12 00:16:26 1994 John Gilmore (gnu@cygnus.com)
* symtab.c (find_addr_symbol): New routine that will find the nearest
symbol associated with an address. It does so by exhaustive
search of the symtabs, so it's slow but complete.
Tue Jan 11 23:57:30 1994 John Gilmore (gnu@cygnus.com)
* coffread.c (read_coff_symtab): Set PC bounds of _globals_ symtab

65
gdb/symtab.c
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@ -1026,6 +1026,71 @@ find_pc_symtab (pc)
}
return (s);
}
/* Find the closest symbol value (of any sort -- function or variable)
for a given address value. Slow but complete. */
struct symbol *
find_addr_symbol (addr)
CORE_ADDR addr;
{
struct symtab *symtab;
struct objfile *objfile;
register int bot, top;
register struct symbol *sym;
register CORE_ADDR sym_addr;
struct block *block;
int blocknum;
/* Info on best symbol seen so far */
register CORE_ADDR best_sym_addr = 0;
struct symbol *best_sym = 0;
/* FIXME -- we should pull in all the psymtabs, too! */
ALL_SYMTABS (objfile, symtab)
{
/* Search the global and static blocks in this symtab for
the closest symbol-address to the desired address. */
for (blocknum = GLOBAL_BLOCK; blocknum <= STATIC_BLOCK; blocknum++)
{
QUIT;
block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (symtab), blocknum);
top = BLOCK_NSYMS (block);
for (bot = 0; bot < top; bot++)
{
sym = BLOCK_SYM (block, bot);
switch (SYMBOL_CLASS (sym))
{
case LOC_STATIC:
case LOC_LABEL:
sym_addr = SYMBOL_VALUE_ADDRESS (sym);
break;
case LOC_BLOCK:
sym_addr = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
break;
default:
continue;
}
if (sym_addr <= addr)
if (sym_addr > best_sym_addr)
{
/* Quit if we found an exact match. */
if (sym_addr == addr)
return sym;
best_sym = sym;
best_sym_addr = sym_addr;
}
}
}
}
return best_sym;
}
/* Find the source file and line number for a given PC value.
Return a structure containing a symtab pointer, a line number,