diff options
| -rw-r--r-- | gdb/ChangeLog | 6 | ||||
| -rw-r--r-- | gdb/symtab.c | 65 |
2 files changed, 71 insertions, 0 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 818e4d0f06..1276cc5344 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -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 diff --git a/gdb/symtab.c b/gdb/symtab.c index cf948aa0b3..880ad9663e 100644 --- a/gdb/symtab.c +++ b/gdb/symtab.c @@ -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, |
