X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=kernel%2Fkallsyms.c;h=374faf9bfdc79c5fcac1ef2d70ce3671765362f7;hb=557055bebe9212dfa6b9f5df811dfd0dac77ec55;hp=f66da025cb7f40cb90ddeabc2bffde4878bdf02b;hpb=ffb45122766db220d0bf3d01848d575fbbcb6430;p=safe%2Fjmp%2Flinux-2.6 diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c index f66da02..374faf9 100644 --- a/kernel/kallsyms.c +++ b/kernel/kallsyms.c @@ -32,9 +32,14 @@ /* These will be re-linked against their real values during the second link stage */ extern const unsigned long kallsyms_addresses[] __attribute__((weak)); -extern const unsigned long kallsyms_num_syms __attribute__((weak)); extern const u8 kallsyms_names[] __attribute__((weak)); +/* tell the compiler that the count isn't in the small data section if the arch + * has one (eg: FRV) + */ +extern const unsigned long kallsyms_num_syms +__attribute__((weak, section(".rodata"))); + extern const u8 kallsyms_token_table[] __attribute__((weak)); extern const u16 kallsyms_token_index[] __attribute__((weak)); @@ -48,14 +53,6 @@ static inline int is_kernel_inittext(unsigned long addr) return 0; } -static inline int is_kernel_extratext(unsigned long addr) -{ - if (addr >= (unsigned long)_sextratext - && addr <= (unsigned long)_eextratext) - return 1; - return 0; -} - static inline int is_kernel_text(unsigned long addr) { if (addr >= (unsigned long)_stext && addr <= (unsigned long)_etext) @@ -75,8 +72,7 @@ static int is_ksym_addr(unsigned long addr) if (all_var) return is_kernel(addr); - return is_kernel_text(addr) || is_kernel_inittext(addr) || - is_kernel_extratext(addr); + return is_kernel_text(addr) || is_kernel_inittext(addr); } /* expand a compressed symbol data into the resulting uncompressed string, @@ -152,7 +148,7 @@ static unsigned int get_symbol_offset(unsigned long pos) /* Lookup the address for this symbol. Returns 0 if not found. */ unsigned long kallsyms_lookup_name(const char *name) { - char namebuf[KSYM_NAME_LEN+1]; + char namebuf[KSYM_NAME_LEN]; unsigned long i; unsigned int off; @@ -165,6 +161,25 @@ unsigned long kallsyms_lookup_name(const char *name) return module_kallsyms_lookup_name(name); } +int kallsyms_on_each_symbol(int (*fn)(void *, const char *, struct module *, + unsigned long), + void *data) +{ + char namebuf[KSYM_NAME_LEN]; + unsigned long i; + unsigned int off; + int ret; + + for (i = 0, off = 0; i < kallsyms_num_syms; i++) { + off = kallsyms_expand_symbol(off, namebuf); + ret = fn(data, namebuf, NULL, kallsyms_addresses[i]); + if (ret != 0) + return ret; + } + return module_kallsyms_on_each_symbol(fn, data); +} +EXPORT_SYMBOL_GPL(kallsyms_on_each_symbol); + static unsigned long get_symbol_pos(unsigned long addr, unsigned long *symbolsize, unsigned long *offset) @@ -180,7 +195,7 @@ static unsigned long get_symbol_pos(unsigned long addr, high = kallsyms_num_syms; while (high - low > 1) { - mid = (low + high) / 2; + mid = low + (high - low) / 2; if (kallsyms_addresses[mid] <= addr) low = mid; else @@ -228,10 +243,11 @@ static unsigned long get_symbol_pos(unsigned long addr, int kallsyms_lookup_size_offset(unsigned long addr, unsigned long *symbolsize, unsigned long *offset) { + char namebuf[KSYM_NAME_LEN]; if (is_ksym_addr(addr)) return !!get_symbol_pos(addr, symbolsize, offset); - return !!module_address_lookup(addr, symbolsize, offset, NULL); + return !!module_address_lookup(addr, symbolsize, offset, NULL, namebuf); } /* @@ -246,9 +262,7 @@ const char *kallsyms_lookup(unsigned long addr, unsigned long *offset, char **modname, char *namebuf) { - const char *msym; - - namebuf[KSYM_NAME_LEN] = 0; + namebuf[KSYM_NAME_LEN - 1] = 0; namebuf[0] = 0; if (is_ksym_addr(addr)) { @@ -257,16 +271,50 @@ const char *kallsyms_lookup(unsigned long addr, pos = get_symbol_pos(addr, symbolsize, offset); /* Grab name */ kallsyms_expand_symbol(get_symbol_offset(pos), namebuf); - *modname = NULL; + if (modname) + *modname = NULL; return namebuf; } /* see if it's in a module */ - msym = module_address_lookup(addr, symbolsize, offset, modname); - if (msym) - return strncpy(namebuf, msym, KSYM_NAME_LEN); + return module_address_lookup(addr, symbolsize, offset, modname, + namebuf); +} - return NULL; +int lookup_symbol_name(unsigned long addr, char *symname) +{ + symname[0] = '\0'; + symname[KSYM_NAME_LEN - 1] = '\0'; + + if (is_ksym_addr(addr)) { + unsigned long pos; + + pos = get_symbol_pos(addr, NULL, NULL); + /* Grab name */ + kallsyms_expand_symbol(get_symbol_offset(pos), symname); + return 0; + } + /* see if it's in a module */ + return lookup_module_symbol_name(addr, symname); +} + +int lookup_symbol_attrs(unsigned long addr, unsigned long *size, + unsigned long *offset, char *modname, char *name) +{ + name[0] = '\0'; + name[KSYM_NAME_LEN - 1] = '\0'; + + if (is_ksym_addr(addr)) { + unsigned long pos; + + pos = get_symbol_pos(addr, size, offset); + /* Grab name */ + kallsyms_expand_symbol(get_symbol_offset(pos), name); + modname[0] = '\0'; + return 0; + } + /* see if it's in a module */ + return lookup_module_symbol_attrs(addr, size, offset, modname, name); } /* Look up a kernel symbol and return it in a text buffer. */ @@ -275,18 +323,24 @@ int sprint_symbol(char *buffer, unsigned long address) char *modname; const char *name; unsigned long offset, size; - char namebuf[KSYM_NAME_LEN+1]; + int len; - name = kallsyms_lookup(address, &size, &offset, &modname, namebuf); + name = kallsyms_lookup(address, &size, &offset, &modname, buffer); if (!name) return sprintf(buffer, "0x%lx", address); - else { - if (modname) - return sprintf(buffer, "%s+%#lx/%#lx [%s]", name, offset, - size, modname); - else - return sprintf(buffer, "%s+%#lx/%#lx", name, offset, size); - } + + if (name != buffer) + strcpy(buffer, name); + len = strlen(buffer); + buffer += len; + + if (modname) + len += sprintf(buffer, "+%#lx/%#lx [%s]", + offset, size, modname); + else + len += sprintf(buffer, "+%#lx/%#lx", offset, size); + + return len; } /* Look up a kernel symbol and print it to the kernel messages. */ @@ -306,8 +360,8 @@ struct kallsym_iter unsigned long value; unsigned int nameoff; /* If iterating in core kernel symbols */ char type; - char name[KSYM_NAME_LEN+1]; - char module_name[MODULE_NAME_LEN + 1]; + char name[KSYM_NAME_LEN]; + char module_name[MODULE_NAME_LEN]; int exported; }; @@ -434,27 +488,16 @@ static int kallsyms_open(struct inode *inode, struct file *file) return ret; } -static int kallsyms_release(struct inode *inode, struct file *file) -{ - struct seq_file *m = (struct seq_file *)file->private_data; - kfree(m->private); - return seq_release(inode, file); -} - static const struct file_operations kallsyms_operations = { .open = kallsyms_open, .read = seq_read, .llseek = seq_lseek, - .release = kallsyms_release, + .release = seq_release_private, }; static int __init kallsyms_init(void) { - struct proc_dir_entry *entry; - - entry = create_proc_entry("kallsyms", 0444, NULL); - if (entry) - entry->proc_fops = &kallsyms_operations; + proc_create("kallsyms", 0444, NULL, &kallsyms_operations); return 0; } __initcall(kallsyms_init);