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* Added new "symbol" command which is able to search for a symbol that

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matches the specified pattern in all loaded kernel images.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24592 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler 2008-03-26 16:10:06 +00:00
parent dc1a7867e0
commit 5dafcc2b1b
1 changed files with 51 additions and 0 deletions
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51
src/system/kernel/elf.cpp
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@ -262,6 +262,56 @@ get_symbol_bind_string(struct Elf32_Sym *symbol)
}
/*! Searches a symbol (pattern) in all kernel images */
static int
dump_symbol(int argc, char **argv)
{
if (argc != 2 || !strcmp(argv[1], "--help")) {
kprintf("usage: %s <symbol-name>\n", argv[0]);
return 0;
}
struct elf_image_info *image = NULL;
struct hash_iterator iterator;
const char *pattern = argv[1];
hash_open(sImagesHash, &iterator);
while ((image = (elf_image_info *)hash_next(sImagesHash, &iterator))
!= NULL) {
if (image->num_debug_symbols > 0) {
// search extended debug symbol table (contains static symbols)
for (uint32 i = 0; i < image->num_debug_symbols; i++) {
struct Elf32_Sym *symbol = &image->debug_symbols[i];
const char *name = image->debug_string_table + symbol->st_name;
if (symbol->st_value > 0 && strstr(name, pattern) != 0) {
kprintf("%p %5lu %s:%s\n",
(void *)(symbol->st_value + image->text_region.delta),
symbol->st_size, image->name, name);
}
}
} else {
// search standard symbol lookup table
for (uint32 i = 0; i < HASHTABSIZE(image); i++) {
for (uint32 j = HASHBUCKETS(image)[i]; j != STN_UNDEF;
j = HASHCHAINS(image)[j]) {
struct Elf32_Sym *symbol = &image->syms[j];
const char *name = SYMNAME(image, symbol);
if (symbol->st_value > 0 && strstr(name, pattern) != 0) {
kprintf("%p %5lu %s:%s\n", (void *)(symbol->st_value
+ image->text_region.delta),
symbol->st_size, image->name, name);
}
}
}
}
}
hash_close(sImagesHash, &iterator, false);
return 0;
}
static int
dump_symbols(int argc, char **argv)
{
@ -1754,6 +1804,7 @@ elf_init(kernel_args *args)
add_debugger_command("ls", &dump_address_info, "lookup symbol for a particular address");
add_debugger_command("symbols", &dump_symbols, "dump symbols for image");
add_debugger_command("symbol", &dump_symbol, "search symbol in images");
add_debugger_command("image", &dump_image, "dump image info");
sInitialized = true;