Release 4.7 kernel/kallsyms.c

Directory: kernel
/*
 * kallsyms.c: in-kernel printing of symbolic oopses and stack traces.
 *
 * Rewritten and vastly simplified by Rusty Russell for in-kernel
 * module loader:
 *   Copyright 2002 Rusty Russell <rusty@rustcorp.com.au> IBM Corporation
 *
 * ChangeLog:
 *
 * (25/Aug/2004) Paulo Marques <pmarques@grupopie.com>
 *      Changed the compression method from stem compression to "table lookup"
 *      compression (see scripts/kallsyms.c for a more complete description)
 */
#include <linux/kallsyms.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/seq_file.h>
#include <linux/fs.h>
#include <linux/kdb.h>
#include <linux/err.h>
#include <linux/proc_fs.h>
#include <linux/sched.h>	/* for cond_resched */
#include <linux/mm.h>
#include <linux/ctype.h>
#include <linux/slab.h>
#include <linux/compiler.h>

#include <asm/sections.h>

#ifdef CONFIG_KALLSYMS_ALL

#define all_var 1
#else

#define all_var 0
#endif

/*
 * These will be re-linked against their real values
 * during the second link stage.
 */
extern const unsigned long kallsyms_addresses[] __weak;
extern const int kallsyms_offsets[] __weak;
extern const u8 kallsyms_names[] __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 unsigned long kallsyms_relative_base
__attribute__((weak, section(".rodata")));

extern const u8 kallsyms_token_table[] __weak;
extern const u16 kallsyms_token_index[] __weak;

extern const unsigned long kallsyms_markers[] __weak;



static inline int is_kernel_inittext(unsigned long addr)
{
	if (addr >= (unsigned long)_sinittext
	    && addr <= (unsigned long)_einittext)
		return 1;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
andrew morton andrew morton 35 100.00% 1 100.00%
Total 35 100.00% 1 100.00%



static inline int is_kernel_text(unsigned long addr)
{
	if ((addr >= (unsigned long)_stext && addr <= (unsigned long)_etext) ||
	    arch_is_kernel_text(addr))
		return 1;
	return in_gate_area_no_mm(addr);
}

Contributors
Person Tokens Prop Commits CommitProp
andrew morton andrew morton 34 75.56% 2 40.00%
mike frysinger mike frysinger 7 15.56% 1 20.00%
keith owens keith owens 3 6.67% 1 20.00%
stephen wilson stephen wilson 1 2.22% 1 20.00%
Total 45 100.00% 5 100.00%



static inline int is_kernel(unsigned long addr)
{
	if (addr >= (unsigned long)_stext && addr <= (unsigned long)_end)
		return 1;
	return in_gate_area_no_mm(addr);
}

Contributors
Person Tokens Prop Commits CommitProp
keith owens keith owens 37 97.37% 1 50.00%
stephen wilson stephen wilson 1 2.63% 1 50.00%
Total 38 100.00% 2 100.00%



static int is_ksym_addr(unsigned long addr)
{
	if (all_var)
		return is_kernel(addr);

	return is_kernel_text(addr) || is_kernel_inittext(addr);
}

Contributors
Person Tokens Prop Commits CommitProp
franck bui-huu franck bui-huu 31 100.00% 1 100.00%
Total 31 100.00% 1 100.00%

/*
 * Expand a compressed symbol data into the resulting uncompressed string,
 * if uncompressed string is too long (>= maxlen), it will be truncated,
 * given the offset to where the symbol is in the compressed stream.
 */


static unsigned int kallsyms_expand_symbol(unsigned int off,
					   char *result, size_t maxlen)
{
	int len, skipped_first = 0;
	const u8 *tptr, *data;

	/* Get the compressed symbol length from the first symbol byte. */
	data = &kallsyms_names[off];
	len = *data;
	data++;

	/*
         * Update the offset to return the offset for the next symbol on
         * the compressed stream.
         */
	off += len + 1;

	/*
         * For every byte on the compressed symbol data, copy the table
         * entry for that byte.
         */
	while (len) {
		tptr = &kallsyms_token_table[kallsyms_token_index[*data]];
		data++;
		len--;

		while (*tptr) {
			if (skipped_first) {
				if (maxlen <= 1)
					goto tail;
				*result = *tptr;
				result++;
				maxlen--;
			} else
				skipped_first = 1;
			tptr++;
		}
	}

tail:
	if (maxlen)
		*result = '\0';

	/* Return to offset to the next symbol. */
	return off;
}

Contributors
Person Tokens Prop Commits CommitProp
paulo marques paulo marques 113 81.29% 1 25.00%
chen gang chen gang 21 15.11% 1 25.00%
manish katiyar manish katiyar 4 2.88% 1 25.00%
jan beulich jan beulich 1 0.72% 1 25.00%
Total 139 100.00% 4 100.00%

/*
 * Get symbol type information. This is encoded as a single char at the
 * beginning of the symbol name.
 */


static char kallsyms_get_symbol_type(unsigned int off)
{
	/*
         * Get just the first code, look it up in the token table,
         * and return the first char from this token.
         */
	return kallsyms_token_table[kallsyms_token_index[kallsyms_names[off + 1]]];
}


Contributors
Person Tokens Prop Commits CommitProp
paulo marques paulo marques 24 96.00% 1 50.00%
manish katiyar manish katiyar 1 4.00% 1 50.00%
Total 25 100.00% 2 100.00%

/*
 * Find the offset on the compressed stream given and index in the
 * kallsyms array.
 */


static unsigned int get_symbol_offset(unsigned long pos)
{
	const u8 *name;
	int i;

	/*
         * Use the closest marker we have. We have markers every 256 positions,
         * so that should be close enough.
         */
	name = &kallsyms_names[kallsyms_markers[pos >> 8]];

	/*
         * Sequentially scan all the symbols up to the point we're searching
         * for. Every symbol is stored in a [<len>][<len> bytes of data] format,
         * so we just need to add the len to the current pointer for every
         * symbol we wish to skip.
         */
	for (i = 0; i < (pos & 0xFF); i++)
		name = name + (*name) + 1;

	return name - kallsyms_names;
}

Contributors
Person Tokens Prop Commits CommitProp
paulo marques paulo marques 64 95.52% 1 33.33%
manish katiyar manish katiyar 2 2.99% 1 33.33%
jan beulich jan beulich 1 1.49% 1 33.33%
Total 67 100.00% 3 100.00%



static unsigned long kallsyms_sym_address(int idx)
{
	if (!IS_ENABLED(CONFIG_KALLSYMS_BASE_RELATIVE))
		return kallsyms_addresses[idx];

	/* values are unsigned offsets if --absolute-percpu is not in effect */
	if (!IS_ENABLED(CONFIG_KALLSYMS_ABSOLUTE_PERCPU))
		return kallsyms_relative_base + (u32)kallsyms_offsets[idx];

	/* ...otherwise, positive offsets are absolute values */
	if (kallsyms_offsets[idx] >= 0)
		return kallsyms_offsets[idx];

	/* ...and negative offsets are relative to kallsyms_relative_base - 1 */
	return kallsyms_relative_base - 1 - kallsyms_offsets[idx];
}

Contributors
Person Tokens Prop Commits CommitProp
ard biesheuvel ard biesheuvel 71 100.00% 1 100.00%
Total 71 100.00% 1 100.00%

/* Lookup the address for this symbol. Returns 0 if not found. */


unsigned long kallsyms_lookup_name(const char *name)
{
	char namebuf[KSYM_NAME_LEN];
	unsigned long i;
	unsigned int off;

	for (i = 0, off = 0; i < kallsyms_num_syms; i++) {
		off = kallsyms_expand_symbol(off, namebuf, ARRAY_SIZE(namebuf));

		if (strcmp(namebuf, name) == 0)
			return kallsyms_sym_address(i);
	}
	return module_kallsyms_lookup_name(name);
}
Contributors
Person Tokens Prop Commits CommitProp
andrew morton andrew morton 62 76.54% 2 33.33%
paulo marques paulo marques 10 12.35% 1 16.67%
chen gang chen gang 5 6.17% 1 16.67%
ard biesheuvel ard biesheuvel 3 3.70% 1 16.67%
mika kukkonen mika kukkonen 1 1.23% 1 16.67%
Total 81 100.00% 6 100.00%


EXPORT_SYMBOL_GPL(kallsyms_lookup_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, ARRAY_SIZE(namebuf));
		ret = fn(data, namebuf, NULL, kallsyms_sym_address(i));
		if (ret != 0)
			return ret;
	}
	return module_kallsyms_on_each_symbol(fn, data);
}
Contributors
Person Tokens Prop Commits CommitProp
anders kaseorg anders kaseorg 105 92.92% 1 33.33%
chen gang chen gang 5 4.42% 1 33.33%
ard biesheuvel ard biesheuvel 3 2.65% 1 33.33%
Total 113 100.00% 3 100.00%


EXPORT_SYMBOL_GPL(kallsyms_on_each_symbol);



static unsigned long get_symbol_pos(unsigned long addr,
				    unsigned long *symbolsize,
				    unsigned long *offset)
{
	unsigned long symbol_start = 0, symbol_end = 0;
	unsigned long i, low, high, mid;

	/* This kernel should never had been booted. */
	if (!IS_ENABLED(CONFIG_KALLSYMS_BASE_RELATIVE))
		BUG_ON(!kallsyms_addresses);
	else
		BUG_ON(!kallsyms_offsets);

	/* Do a binary search on the sorted kallsyms_addresses array. */
	low = 0;
	high = kallsyms_num_syms;

	while (high - low > 1) {
		mid = low + (high - low) / 2;
		if (kallsyms_sym_address(mid) <= addr)
			low = mid;
		else
			high = mid;
	}

	/*
         * Search for the first aliased symbol. Aliased
         * symbols are symbols with the same address.
         */
	while (low && kallsyms_sym_address(low-1) == kallsyms_sym_address(low))
		--low;

	symbol_start = kallsyms_sym_address(low);

	/* Search for next non-aliased symbol. */
	for (i = low + 1; i < kallsyms_num_syms; i++) {
		if (kallsyms_sym_address(i) > symbol_start) {
			symbol_end = kallsyms_sym_address(i);
			break;
		}
	}

	/* If we found no next symbol, we use the end of the section. */
	if (!symbol_end) {
		if (is_kernel_inittext(addr))
			symbol_end = (unsigned long)_einittext;
		else if (all_var)
			symbol_end = (unsigned long)_end;
		else
			symbol_end = (unsigned long)_etext;
	}

	if (symbolsize)
		*symbolsize = symbol_end - symbol_start;
	if (offset)
		*offset = addr - symbol_start;

	return low;
}

Contributors
Person Tokens Prop Commits CommitProp
paulo marques paulo marques 85 34.55% 1 8.33%
ard biesheuvel ard biesheuvel 33 13.41% 1 8.33%
franck bui-huu franck bui-huu 32 13.01% 1 8.33%
andrew morton andrew morton 28 11.38% 1 8.33%
ingo molnar ingo molnar 21 8.54% 1 8.33%
rusty russell rusty russell 19 7.72% 1 8.33%
alexey dobriyan alexey dobriyan 8 3.25% 1 8.33%
sam ravnborg sam ravnborg 7 2.85% 1 8.33%
keith owens keith owens 5 2.03% 1 8.33%
manish katiyar manish katiyar 4 1.63% 1 8.33%
vegard nossum vegard nossum 3 1.22% 1 8.33%
kai germaschewski kai germaschewski 1 0.41% 1 8.33%
Total 246 100.00% 12 100.00%

/*
 * Lookup an address but don't bother to find any names.
 */


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, namebuf);
}

Contributors
Person Tokens Prop Commits CommitProp
franck bui-huu franck bui-huu 52 86.67% 1 50.00%
rusty russell rusty russell 8 13.33% 1 50.00%
Total 60 100.00% 2 100.00%

/*
 * Lookup an address
 * - modname is set to NULL if it's in the kernel.
 * - We guarantee that the returned name is valid until we reschedule even if.
 *   It resides in a module.
 * - We also guarantee that modname will be valid until rescheduled.
 */


const char *kallsyms_lookup(unsigned long addr,
			    unsigned long *symbolsize,
			    unsigned long *offset,
			    char **modname, char *namebuf)
{
	namebuf[KSYM_NAME_LEN - 1] = 0;
	namebuf[0] = 0;

	if (is_ksym_addr(addr)) {
		unsigned long pos;

		pos = get_symbol_pos(addr, symbolsize, offset);
		/* Grab name */
		kallsyms_expand_symbol(get_symbol_offset(pos),
				       namebuf, KSYM_NAME_LEN);
		if (modname)
			*modname = NULL;
		return namebuf;
	}

	/* See if it's in a module. */
	return module_address_lookup(addr, symbolsize, offset, modname,
				     namebuf);
}

Contributors
Person Tokens Prop Commits CommitProp
franck bui-huu franck bui-huu 80 72.73% 1 10.00%
rusty russell rusty russell 14 12.73% 2 20.00%
kyle mcmartin kyle mcmartin 4 3.64% 1 10.00%
david howells david howells 3 2.73% 1 10.00%
ingo molnar ingo molnar 3 2.73% 1 10.00%
tejun heo tejun heo 2 1.82% 1 10.00%
chen gang chen gang 2 1.82% 1 10.00%
manish katiyar manish katiyar 1 0.91% 1 10.00%
andi kleen andi kleen 1 0.91% 1 10.00%
Total 110 100.00% 10 100.00%



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, KSYM_NAME_LEN);
		return 0;
	}
	/* See if it's in a module. */
	return lookup_module_symbol_name(addr, symname);
}

Contributors
Person Tokens Prop Commits CommitProp
alexey dobriyan alexey dobriyan 73 93.59% 1 25.00%
tejun heo tejun heo 2 2.56% 1 25.00%
chen gang chen gang 2 2.56% 1 25.00%
manish katiyar manish katiyar 1 1.28% 1 25.00%
Total 78 100.00% 4 100.00%



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, KSYM_NAME_LEN);
		modname[0] = '\0';
		return 0;
	}
	/* See if it's in a module. */
	return lookup_module_symbol_attrs(addr, size, offset, modname, name);
}

Contributors
Person Tokens Prop Commits CommitProp
alexey dobriyan alexey dobriyan 100 95.24% 1 25.00%
chen gang chen gang 2 1.90% 1 25.00%
tejun heo tejun heo 2 1.90% 1 25.00%
manish katiyar manish katiyar 1 0.95% 1 25.00%
Total 105 100.00% 4 100.00%

/* Look up a kernel symbol and return it in a text buffer. */


static int __sprint_symbol(char *buffer, unsigned long address,
			   int symbol_offset, int add_offset)
{
	char *modname;
	const char *name;
	unsigned long offset, size;
	int len;

	address += symbol_offset;
	name = kallsyms_lookup(address, &size, &offset, &modname, buffer);
	if (!name)
		return sprintf(buffer, "0x%lx", address - symbol_offset);

	if (name != buffer)
		strcpy(buffer, name);
	len = strlen(buffer);
	offset -= symbol_offset;

	if (add_offset)
		len += sprintf(buffer + len, "+%#lx/%#lx", offset, size);

	if (modname)
		len += sprintf(buffer + len, " [%s]", modname);

	return len;
}

Contributors
Person Tokens Prop Commits CommitProp
rusty russell rusty russell 54 38.57% 1 11.11%
hugh dickins hugh dickins 31 22.14% 1 11.11%
ingo molnar ingo molnar 16 11.43% 1 11.11%
namhyung kim namhyung kim 15 10.71% 2 22.22%
stephen boyd stephen boyd 15 10.71% 1 11.11%
robert s. peterson robert s. peterson 6 4.29% 1 11.11%
mika kukkonen mika kukkonen 2 1.43% 1 11.11%
andi kleen andi kleen 1 0.71% 1 11.11%
Total 140 100.00% 9 100.00%

/**
 * sprint_symbol - Look up a kernel symbol and return it in a text buffer
 * @buffer: buffer to be stored
 * @address: address to lookup
 *
 * This function looks up a kernel symbol with @address and stores its name,
 * offset, size and module name to @buffer if possible. If no symbol was found,
 * just saves its @address as is.
 *
 * This function returns the number of bytes stored in @buffer.
 */


int sprint_symbol(char *buffer, unsigned long address)
{
	return __sprint_symbol(buffer, address, 0, 1);
}
Contributors
Person Tokens Prop Commits CommitProp
namhyung kim namhyung kim 23 92.00% 1 50.00%
stephen boyd stephen boyd 2 8.00% 1 50.00%
Total 25 100.00% 2 100.00%


EXPORT_SYMBOL_GPL(sprint_symbol);

/**
 * sprint_symbol_no_offset - Look up a kernel symbol and return it in a text buffer
 * @buffer: buffer to be stored
 * @address: address to lookup
 *
 * This function looks up a kernel symbol with @address and stores its name
 * and module name to @buffer if possible. If no symbol was found, just saves
 * its @address as is.
 *
 * This function returns the number of bytes stored in @buffer.
 */


int sprint_symbol_no_offset(char *buffer, unsigned long address)
{
	return __sprint_symbol(buffer, address, 0, 0);
}
Contributors
Person Tokens Prop Commits CommitProp
stephen boyd stephen boyd 25 100.00% 1 100.00%
Total 25 100.00% 1 100.00%


EXPORT_SYMBOL_GPL(sprint_symbol_no_offset);

/**
 * sprint_backtrace - Look up a backtrace symbol and return it in a text buffer
 * @buffer: buffer to be stored
 * @address: address to lookup
 *
 * This function is for stack backtrace and does the same thing as
 * sprint_symbol() but with modified/decreased @address. If there is a
 * tail-call to the function marked "noreturn", gcc optimized out code after
 * the call so that the stack-saved return address could point outside of the
 * caller. This function ensures that kallsyms will find the original caller
 * by decreasing @address.
 *
 * This function returns the number of bytes stored in @buffer.
 */


int sprint_backtrace(char *buffer, unsigned long address)
{
	return __sprint_symbol(buffer, address, -1, 1);
}

Contributors
Person Tokens Prop Commits CommitProp
namhyung kim namhyung kim 24 92.31% 1 50.00%
stephen boyd stephen boyd 2 7.69% 1 50.00%
Total 26 100.00% 2 100.00%

/* Look up a kernel symbol and print it to the kernel messages. */


void __print_symbol(const char *fmt, unsigned long address)
{
	char buffer[KSYM_SYMBOL_LEN];

	sprint_symbol(buffer, address);

	printk(fmt, buffer);
}
Contributors
Person Tokens Prop Commits CommitProp
robert s. peterson robert s. peterson 26 76.47% 1 33.33%
rusty russell rusty russell 5 14.71% 1 33.33%
ingo molnar ingo molnar 3 8.82% 1 33.33%
Total 34 100.00% 3 100.00%


EXPORT_SYMBOL(__print_symbol);

/* To avoid using get_symbol_offset for every symbol, we carry prefix along. */

struct kallsym_iter {
	
loff_t pos;
	
unsigned long value;
	
unsigned int nameoff; /* If iterating in core kernel symbols. */
	
char type;
	
char name[KSYM_NAME_LEN];
	
char module_name[MODULE_NAME_LEN];
	
int exported;
};



static int get_ksymbol_mod(struct kallsym_iter *iter)
{
	if (module_get_kallsym(iter->pos - kallsyms_num_syms, &iter->value,
				&iter->type, iter->name, iter->module_name,
				&iter->exported) < 0)
		return 0;
	return 1;
}

Contributors
Person Tokens Prop Commits CommitProp
rusty russell rusty russell 36 67.92% 1 33.33%
alexey dobriyan alexey dobriyan 12 22.64% 1 33.33%
adam b. jerome adam b. jerome 5 9.43% 1 33.33%
Total 53 100.00% 3 100.00%

/* Returns space to next name. */


static unsigned long get_ksymbol_core(struct kallsym_iter *iter)
{
	unsigned off = iter->nameoff;

	iter->module_name[0] = '\0';
	iter->value = kallsyms_sym_address(iter->pos);

	iter->type = kallsyms_get_symbol_type(off);

	off = kallsyms_expand_symbol(off, iter->name, ARRAY_SIZE(iter->name));

	return off - iter->nameoff;
}

Contributors
Person Tokens Prop Commits CommitProp
rusty russell rusty russell 33 45.21% 1 14.29%
andrew morton andrew morton 15 20.55% 2 28.57%
paulo marques paulo marques 10 13.70% 1 14.29%
chen gang chen gang 7 9.59% 1 14.29%
alexey dobriyan alexey dobriyan 5 6.85% 1 14.29%
ard biesheuvel ard biesheuvel 3 4.11% 1 14.29%
Total 73 100.00% 7 100.00%



static void reset_iter(struct kallsym_iter *iter, loff_t new_pos)
{
	iter->name[0] = '\0';
	iter->nameoff = get_symbol_offset(new_pos);
	iter->pos = new_pos;
}

Contributors
Person Tokens Prop Commits CommitProp
rusty russell rusty russell 30 78.95% 1 50.00%
paulo marques paulo marques 8 21.05% 1 50.00%
Total 38 100.00% 2 100.00%

/* Returns false if pos at or past end of file. */


static int update_iter(struct kallsym_iter *iter, loff_t pos)
{
	/* Module symbols can be accessed randomly. */
	if (pos >= kallsyms_num_syms) {
		iter->pos = pos;
		return get_ksymbol_mod(iter);
	}

	/* If we're not on the desired position, reset to new position. */
	if (pos != iter->pos)
		reset_iter(iter, pos);

	iter->nameoff += get_ksymbol_core(iter);
	iter->pos++;

	return 1;
}

Contributors
Person Tokens Prop Commits CommitProp
rusty russell rusty russell 55 80.88% 1 33.33%
paulo marques paulo marques 7 10.29% 1 33.33%
andrew morton andrew morton 6 8.82% 1 33.33%
Total 68 100.00% 3 100.00%



static void *s_next(struct seq_file *m, void *p, loff_t *pos)
{
	(*pos)++;

	if (!update_iter(m->private, *pos))
		return NULL;
	return p;
}

Contributors
Person Tokens Prop Commits CommitProp
rusty russell rusty russell 45 100.00% 1 100.00%
Total 45 100.00% 1 100.00%



static void *s_start(struct seq_file *m, loff_t *pos)
{
	if (!update_iter(m->private, *pos))
		return NULL;
	return m->private;
}

Contributors
Person Tokens Prop Commits CommitProp
rusty russell rusty russell 37 100.00% 1 100.00%
Total 37 100.00% 1 100.00%



static void s_stop(struct seq_file *m, void *p)
{
}

Contributors
Person Tokens Prop Commits CommitProp
rusty russell rusty russell 14 100.00% 1 100.00%
Total 14 100.00% 1 100.00%



static int s_show(struct seq_file *m, void *p)
{
	struct kallsym_iter *iter = m->private;

	/* Some debugging symbols have no name.  Ignore them. */
	if (!iter->name[0])
		return 0;

	if (iter->module_name[0]) {
		char type;

		/*
                 * Label it "global" if it is exported,
                 * "local" if not exported.
                 */
		type = iter->exported ? toupper(iter->type) :
					tolower(iter->type);
		seq_printf(m, "%pK %c %s\t[%s]\n", (void *)iter->value,
			   type, iter->name, iter->module_name);
	} else
		seq_printf(m, "%pK %c %s\n", (void *)iter->value,
			   iter->type, iter->name);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
rusty russell rusty russell 88 70.40% 1 25.00%
alexey dobriyan alexey dobriyan 30 24.00% 1 25.00%
kees cook kees cook 6 4.80% 1 25.00%
manish katiyar manish katiyar 1 0.80% 1 25.00%
Total 125 100.00% 4 100.00%


static const struct seq_operations kallsyms_op = {
	.start = s_start,
	.next = s_next,
	.stop = s_stop,
	.show = s_show
};



static int kallsyms_open(struct inode *inode, struct file *file)
{
	/*
         * We keep iterator in m->private, since normal case is to
         * s_start from where we left off, so we avoid doing
         * using get_symbol_offset for every symbol.
         */
	struct kallsym_iter *iter;
	iter = __seq_open_private(file, &kallsyms_op, sizeof(*iter));
	if (!iter)
		return -ENOMEM;
	reset_iter(iter, 0);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
rusty russell rusty russell 47 82.46% 2 40.00%
rob jones rob jones 7 12.28% 1 20.00%
paulo marques paulo marques 2 3.51% 1 20.00%
manish katiyar manish katiyar 1 1.75% 1 20.00%
Total 57 100.00% 5 100.00%

#ifdef	CONFIG_KGDB_KDB


const char *kdb_walk_kallsyms(loff_t *pos)
{
	static struct kallsym_iter kdb_walk_kallsyms_iter;
	if (*pos == 0) {
		memset(&kdb_walk_kallsyms_iter, 0,
		       sizeof(kdb_walk_kallsyms_iter));
		reset_iter(&kdb_walk_kallsyms_iter, 0);
	}
	while (1) {
		if (!update_iter(&kdb_walk_kallsyms_iter, *pos))
			return NULL;
		++*pos;
		/* Some debugging symbols have no name.  Ignore them. */
		if (kdb_walk_kallsyms_iter.name[0])
			return kdb_walk_kallsyms_iter.name;
	}
}
Contributors
Person Tokens Prop Commits CommitProp
jason wessel jason wessel 86 100.00% 1 100.00%
Total 86 100.00% 1 100.00%

#endif	/* CONFIG_KGDB_KDB */


static const struct file_operations kallsyms_operations = {
	.open = kallsyms_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = seq_release_private,
};



static int __init kallsyms_init(void)
{
	proc_create("kallsyms", 0444, NULL, &kallsyms_operations);
	return 0;
}
Contributors
Person Tokens Prop Commits CommitProp
rusty russell rusty russell 19 79.17% 1 25.00%
denis v. lunev denis v. lunev 3 12.50% 1 25.00%
adrian bunk adrian bunk 1 4.17% 1 25.00%
linus torvalds linus torvalds 1 4.17% 1 25.00%
Total 24 100.00% 4 100.00%


device_initcall(kallsyms_init);
Overall Contributors
Person Tokens Prop Commits CommitProp
rusty russell rusty russell 613 25.61% 4 7.41%
paulo marques paulo marques 341 14.24% 1 1.85%
alexey dobriyan alexey dobriyan 237 9.90% 4 7.41%
franck bui-huu franck bui-huu 196 8.19% 1 1.85%
andrew morton andrew morton 182 7.60% 5 9.26%
ard biesheuvel ard biesheuvel 137 5.72% 1 1.85%
anders kaseorg anders kaseorg 110 4.59% 1 1.85%
jason wessel jason wessel 95 3.97% 1 1.85%
namhyung kim namhyung kim 64 2.67% 2 3.70%
keith owens keith owens 63 2.63% 2 3.70%
ingo molnar ingo molnar 50 2.09% 1 1.85%
stephen boyd stephen boyd 50 2.09% 1 1.85%
chen gang chen gang 45 1.88% 1 1.85%
robert s. peterson robert s. peterson 34 1.42% 1 1.85%
manish katiyar manish katiyar 33 1.38% 1 1.85%
hugh dickins hugh dickins 31 1.29% 1 1.85%
david howells david howells 15 0.63% 3 5.56%
sam ravnborg sam ravnborg 10 0.42% 1 1.85%
tejun heo tejun heo 9 0.38% 2 3.70%
jan beulich jan beulich 8 0.33% 1 1.85%
gideon israel dsouza gideon israel dsouza 8 0.33% 1 1.85%
adam b. jerome adam b. jerome 8 0.33% 1 1.85%
rob jones rob jones 7 0.29% 1 1.85%
mike frysinger mike frysinger 7 0.29% 1 1.85%
kees cook kees cook 6 0.25% 1 1.85%
frederic weisbecker frederic weisbecker 5 0.21% 1 1.85%
kyle mcmartin kyle mcmartin 4 0.17% 1 1.85%
tim schmielau tim schmielau 4 0.17% 1 1.85%
mika kukkonen mika kukkonen 4 0.17% 1 1.85%
denis v. lunev denis v. lunev 3 0.13% 1 1.85%
vegard nossum vegard nossum 3 0.13% 1 1.85%
helge deller helge deller 2 0.08% 1 1.85%
andi kleen andi kleen 2 0.08% 1 1.85%
adrian bunk adrian bunk 2 0.08% 1 1.85%
kai germaschewski kai germaschewski 2 0.08% 2 3.70%
stephen wilson stephen wilson 2 0.08% 1 1.85%
martin peschke martin peschke 1 0.04% 1 1.85%
linus torvalds linus torvalds 1 0.04% 1 1.85%
Total 2394 100.00% 54 100.00%
  Directory: kernel

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
	Person	Tokens	Prop	Commits	CommitProp
andrew morton	andrew morton	35	100.00%	1	100.00%
	Total	35	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.7 kernel/kallsyms.c

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