796 lines
17 KiB
C
796 lines
17 KiB
C
#include "util.h"
|
|
#include "../perf.h"
|
|
#include "string.h"
|
|
#include "symbol.h"
|
|
|
|
#include <libelf.h>
|
|
#include <gelf.h>
|
|
#include <elf.h>
|
|
|
|
const char *sym_hist_filter;
|
|
|
|
static struct symbol *symbol__new(u64 start, u64 len,
|
|
const char *name, unsigned int priv_size,
|
|
u64 obj_start, int verbose)
|
|
{
|
|
size_t namelen = strlen(name) + 1;
|
|
struct symbol *self = calloc(1, priv_size + sizeof(*self) + namelen);
|
|
|
|
if (!self)
|
|
return NULL;
|
|
|
|
if (verbose >= 2)
|
|
printf("new symbol: %016Lx [%08lx]: %s, hist: %p, obj_start: %p\n",
|
|
(u64)start, (unsigned long)len, name, self->hist, (void *)(unsigned long)obj_start);
|
|
|
|
self->obj_start= obj_start;
|
|
self->hist = NULL;
|
|
self->hist_sum = 0;
|
|
|
|
if (sym_hist_filter && !strcmp(name, sym_hist_filter))
|
|
self->hist = calloc(sizeof(u64), len);
|
|
|
|
if (priv_size) {
|
|
memset(self, 0, priv_size);
|
|
self = ((void *)self) + priv_size;
|
|
}
|
|
self->start = start;
|
|
self->end = len ? start + len - 1 : start;
|
|
memcpy(self->name, name, namelen);
|
|
|
|
return self;
|
|
}
|
|
|
|
static void symbol__delete(struct symbol *self, unsigned int priv_size)
|
|
{
|
|
free(((void *)self) - priv_size);
|
|
}
|
|
|
|
static size_t symbol__fprintf(struct symbol *self, FILE *fp)
|
|
{
|
|
if (!self->module)
|
|
return fprintf(fp, " %llx-%llx %s\n",
|
|
self->start, self->end, self->name);
|
|
else
|
|
return fprintf(fp, " %llx-%llx %s \t[%s]\n",
|
|
self->start, self->end, self->name, self->module->name);
|
|
}
|
|
|
|
struct dso *dso__new(const char *name, unsigned int sym_priv_size)
|
|
{
|
|
struct dso *self = malloc(sizeof(*self) + strlen(name) + 1);
|
|
|
|
if (self != NULL) {
|
|
strcpy(self->name, name);
|
|
self->syms = RB_ROOT;
|
|
self->sym_priv_size = sym_priv_size;
|
|
self->find_symbol = dso__find_symbol;
|
|
self->slen_calculated = 0;
|
|
}
|
|
|
|
return self;
|
|
}
|
|
|
|
static void dso__delete_symbols(struct dso *self)
|
|
{
|
|
struct symbol *pos;
|
|
struct rb_node *next = rb_first(&self->syms);
|
|
|
|
while (next) {
|
|
pos = rb_entry(next, struct symbol, rb_node);
|
|
next = rb_next(&pos->rb_node);
|
|
rb_erase(&pos->rb_node, &self->syms);
|
|
symbol__delete(pos, self->sym_priv_size);
|
|
}
|
|
}
|
|
|
|
void dso__delete(struct dso *self)
|
|
{
|
|
dso__delete_symbols(self);
|
|
free(self);
|
|
}
|
|
|
|
static void dso__insert_symbol(struct dso *self, struct symbol *sym)
|
|
{
|
|
struct rb_node **p = &self->syms.rb_node;
|
|
struct rb_node *parent = NULL;
|
|
const u64 ip = sym->start;
|
|
struct symbol *s;
|
|
|
|
while (*p != NULL) {
|
|
parent = *p;
|
|
s = rb_entry(parent, struct symbol, rb_node);
|
|
if (ip < s->start)
|
|
p = &(*p)->rb_left;
|
|
else
|
|
p = &(*p)->rb_right;
|
|
}
|
|
rb_link_node(&sym->rb_node, parent, p);
|
|
rb_insert_color(&sym->rb_node, &self->syms);
|
|
}
|
|
|
|
struct symbol *dso__find_symbol(struct dso *self, u64 ip)
|
|
{
|
|
struct rb_node *n;
|
|
|
|
if (self == NULL)
|
|
return NULL;
|
|
|
|
n = self->syms.rb_node;
|
|
|
|
while (n) {
|
|
struct symbol *s = rb_entry(n, struct symbol, rb_node);
|
|
|
|
if (ip < s->start)
|
|
n = n->rb_left;
|
|
else if (ip > s->end)
|
|
n = n->rb_right;
|
|
else
|
|
return s;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
size_t dso__fprintf(struct dso *self, FILE *fp)
|
|
{
|
|
size_t ret = fprintf(fp, "dso: %s\n", self->name);
|
|
|
|
struct rb_node *nd;
|
|
for (nd = rb_first(&self->syms); nd; nd = rb_next(nd)) {
|
|
struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
|
|
ret += symbol__fprintf(pos, fp);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int dso__load_kallsyms(struct dso *self, symbol_filter_t filter, int verbose)
|
|
{
|
|
struct rb_node *nd, *prevnd;
|
|
char *line = NULL;
|
|
size_t n;
|
|
FILE *file = fopen("/proc/kallsyms", "r");
|
|
int count = 0;
|
|
|
|
if (file == NULL)
|
|
goto out_failure;
|
|
|
|
while (!feof(file)) {
|
|
u64 start;
|
|
struct symbol *sym;
|
|
int line_len, len;
|
|
char symbol_type;
|
|
|
|
line_len = getline(&line, &n, file);
|
|
if (line_len < 0)
|
|
break;
|
|
|
|
if (!line)
|
|
goto out_failure;
|
|
|
|
line[--line_len] = '\0'; /* \n */
|
|
|
|
len = hex2u64(line, &start);
|
|
|
|
len++;
|
|
if (len + 2 >= line_len)
|
|
continue;
|
|
|
|
symbol_type = toupper(line[len]);
|
|
/*
|
|
* We're interested only in code ('T'ext)
|
|
*/
|
|
if (symbol_type != 'T' && symbol_type != 'W')
|
|
continue;
|
|
/*
|
|
* Well fix up the end later, when we have all sorted.
|
|
*/
|
|
sym = symbol__new(start, 0xdead, line + len + 2,
|
|
self->sym_priv_size, 0, verbose);
|
|
|
|
if (sym == NULL)
|
|
goto out_delete_line;
|
|
|
|
if (filter && filter(self, sym))
|
|
symbol__delete(sym, self->sym_priv_size);
|
|
else {
|
|
dso__insert_symbol(self, sym);
|
|
count++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Now that we have all sorted out, just set the ->end of all
|
|
* symbols
|
|
*/
|
|
prevnd = rb_first(&self->syms);
|
|
|
|
if (prevnd == NULL)
|
|
goto out_delete_line;
|
|
|
|
for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) {
|
|
struct symbol *prev = rb_entry(prevnd, struct symbol, rb_node),
|
|
*curr = rb_entry(nd, struct symbol, rb_node);
|
|
|
|
prev->end = curr->start - 1;
|
|
prevnd = nd;
|
|
}
|
|
|
|
free(line);
|
|
fclose(file);
|
|
|
|
return count;
|
|
|
|
out_delete_line:
|
|
free(line);
|
|
out_failure:
|
|
return -1;
|
|
}
|
|
|
|
static int dso__load_perf_map(struct dso *self, symbol_filter_t filter, int verbose)
|
|
{
|
|
char *line = NULL;
|
|
size_t n;
|
|
FILE *file;
|
|
int nr_syms = 0;
|
|
|
|
file = fopen(self->name, "r");
|
|
if (file == NULL)
|
|
goto out_failure;
|
|
|
|
while (!feof(file)) {
|
|
u64 start, size;
|
|
struct symbol *sym;
|
|
int line_len, len;
|
|
|
|
line_len = getline(&line, &n, file);
|
|
if (line_len < 0)
|
|
break;
|
|
|
|
if (!line)
|
|
goto out_failure;
|
|
|
|
line[--line_len] = '\0'; /* \n */
|
|
|
|
len = hex2u64(line, &start);
|
|
|
|
len++;
|
|
if (len + 2 >= line_len)
|
|
continue;
|
|
|
|
len += hex2u64(line + len, &size);
|
|
|
|
len++;
|
|
if (len + 2 >= line_len)
|
|
continue;
|
|
|
|
sym = symbol__new(start, size, line + len,
|
|
self->sym_priv_size, start, verbose);
|
|
|
|
if (sym == NULL)
|
|
goto out_delete_line;
|
|
|
|
if (filter && filter(self, sym))
|
|
symbol__delete(sym, self->sym_priv_size);
|
|
else {
|
|
dso__insert_symbol(self, sym);
|
|
nr_syms++;
|
|
}
|
|
}
|
|
|
|
free(line);
|
|
fclose(file);
|
|
|
|
return nr_syms;
|
|
|
|
out_delete_line:
|
|
free(line);
|
|
out_failure:
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* elf_symtab__for_each_symbol - iterate thru all the symbols
|
|
*
|
|
* @self: struct elf_symtab instance to iterate
|
|
* @index: uint32_t index
|
|
* @sym: GElf_Sym iterator
|
|
*/
|
|
#define elf_symtab__for_each_symbol(syms, nr_syms, index, sym) \
|
|
for (index = 0, gelf_getsym(syms, index, &sym);\
|
|
index < nr_syms; \
|
|
index++, gelf_getsym(syms, index, &sym))
|
|
|
|
static inline uint8_t elf_sym__type(const GElf_Sym *sym)
|
|
{
|
|
return GELF_ST_TYPE(sym->st_info);
|
|
}
|
|
|
|
static inline int elf_sym__is_function(const GElf_Sym *sym)
|
|
{
|
|
return elf_sym__type(sym) == STT_FUNC &&
|
|
sym->st_name != 0 &&
|
|
sym->st_shndx != SHN_UNDEF &&
|
|
sym->st_size != 0;
|
|
}
|
|
|
|
static inline int elf_sym__is_label(const GElf_Sym *sym)
|
|
{
|
|
return elf_sym__type(sym) == STT_NOTYPE &&
|
|
sym->st_name != 0 &&
|
|
sym->st_shndx != SHN_UNDEF &&
|
|
sym->st_shndx != SHN_ABS;
|
|
}
|
|
|
|
static inline const char *elf_sec__name(const GElf_Shdr *shdr,
|
|
const Elf_Data *secstrs)
|
|
{
|
|
return secstrs->d_buf + shdr->sh_name;
|
|
}
|
|
|
|
static inline int elf_sec__is_text(const GElf_Shdr *shdr,
|
|
const Elf_Data *secstrs)
|
|
{
|
|
return strstr(elf_sec__name(shdr, secstrs), "text") != NULL;
|
|
}
|
|
|
|
static inline const char *elf_sym__name(const GElf_Sym *sym,
|
|
const Elf_Data *symstrs)
|
|
{
|
|
return symstrs->d_buf + sym->st_name;
|
|
}
|
|
|
|
static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
|
|
GElf_Shdr *shp, const char *name,
|
|
size_t *index)
|
|
{
|
|
Elf_Scn *sec = NULL;
|
|
size_t cnt = 1;
|
|
|
|
while ((sec = elf_nextscn(elf, sec)) != NULL) {
|
|
char *str;
|
|
|
|
gelf_getshdr(sec, shp);
|
|
str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name);
|
|
if (!strcmp(name, str)) {
|
|
if (index)
|
|
*index = cnt;
|
|
break;
|
|
}
|
|
++cnt;
|
|
}
|
|
|
|
return sec;
|
|
}
|
|
|
|
#define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \
|
|
for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \
|
|
idx < nr_entries; \
|
|
++idx, pos = gelf_getrel(reldata, idx, &pos_mem))
|
|
|
|
#define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \
|
|
for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \
|
|
idx < nr_entries; \
|
|
++idx, pos = gelf_getrela(reldata, idx, &pos_mem))
|
|
|
|
static int dso__synthesize_plt_symbols(struct dso *self, Elf *elf,
|
|
GElf_Ehdr *ehdr, Elf_Scn *scn_dynsym,
|
|
GElf_Shdr *shdr_dynsym,
|
|
size_t dynsym_idx, int verbose)
|
|
{
|
|
uint32_t nr_rel_entries, idx;
|
|
GElf_Sym sym;
|
|
u64 plt_offset;
|
|
GElf_Shdr shdr_plt;
|
|
struct symbol *f;
|
|
GElf_Shdr shdr_rel_plt;
|
|
Elf_Data *reldata, *syms, *symstrs;
|
|
Elf_Scn *scn_plt_rel, *scn_symstrs;
|
|
char sympltname[1024];
|
|
int nr = 0, symidx;
|
|
|
|
scn_plt_rel = elf_section_by_name(elf, ehdr, &shdr_rel_plt,
|
|
".rela.plt", NULL);
|
|
if (scn_plt_rel == NULL) {
|
|
scn_plt_rel = elf_section_by_name(elf, ehdr, &shdr_rel_plt,
|
|
".rel.plt", NULL);
|
|
if (scn_plt_rel == NULL)
|
|
return 0;
|
|
}
|
|
|
|
if (shdr_rel_plt.sh_link != dynsym_idx)
|
|
return 0;
|
|
|
|
if (elf_section_by_name(elf, ehdr, &shdr_plt, ".plt", NULL) == NULL)
|
|
return 0;
|
|
|
|
/*
|
|
* Fetch the relocation section to find the indexes to the GOT
|
|
* and the symbols in the .dynsym they refer to.
|
|
*/
|
|
reldata = elf_getdata(scn_plt_rel, NULL);
|
|
if (reldata == NULL)
|
|
return -1;
|
|
|
|
syms = elf_getdata(scn_dynsym, NULL);
|
|
if (syms == NULL)
|
|
return -1;
|
|
|
|
scn_symstrs = elf_getscn(elf, shdr_dynsym->sh_link);
|
|
if (scn_symstrs == NULL)
|
|
return -1;
|
|
|
|
symstrs = elf_getdata(scn_symstrs, NULL);
|
|
if (symstrs == NULL)
|
|
return -1;
|
|
|
|
nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize;
|
|
plt_offset = shdr_plt.sh_offset;
|
|
|
|
if (shdr_rel_plt.sh_type == SHT_RELA) {
|
|
GElf_Rela pos_mem, *pos;
|
|
|
|
elf_section__for_each_rela(reldata, pos, pos_mem, idx,
|
|
nr_rel_entries) {
|
|
symidx = GELF_R_SYM(pos->r_info);
|
|
plt_offset += shdr_plt.sh_entsize;
|
|
gelf_getsym(syms, symidx, &sym);
|
|
snprintf(sympltname, sizeof(sympltname),
|
|
"%s@plt", elf_sym__name(&sym, symstrs));
|
|
|
|
f = symbol__new(plt_offset, shdr_plt.sh_entsize,
|
|
sympltname, self->sym_priv_size, 0, verbose);
|
|
if (!f)
|
|
return -1;
|
|
|
|
dso__insert_symbol(self, f);
|
|
++nr;
|
|
}
|
|
} else if (shdr_rel_plt.sh_type == SHT_REL) {
|
|
GElf_Rel pos_mem, *pos;
|
|
elf_section__for_each_rel(reldata, pos, pos_mem, idx,
|
|
nr_rel_entries) {
|
|
symidx = GELF_R_SYM(pos->r_info);
|
|
plt_offset += shdr_plt.sh_entsize;
|
|
gelf_getsym(syms, symidx, &sym);
|
|
snprintf(sympltname, sizeof(sympltname),
|
|
"%s@plt", elf_sym__name(&sym, symstrs));
|
|
|
|
f = symbol__new(plt_offset, shdr_plt.sh_entsize,
|
|
sympltname, self->sym_priv_size, 0, verbose);
|
|
if (!f)
|
|
return -1;
|
|
|
|
dso__insert_symbol(self, f);
|
|
++nr;
|
|
}
|
|
} else {
|
|
/*
|
|
* TODO: There are still one more shdr_rel_plt.sh_type
|
|
* I have to investigate, but probably should be ignored.
|
|
*/
|
|
}
|
|
|
|
return nr;
|
|
}
|
|
|
|
static int dso__load_sym(struct dso *self, int fd, const char *name,
|
|
symbol_filter_t filter, int verbose, struct module *mod)
|
|
{
|
|
Elf_Data *symstrs, *secstrs;
|
|
uint32_t nr_syms;
|
|
int err = -1;
|
|
uint32_t index;
|
|
GElf_Ehdr ehdr;
|
|
GElf_Shdr shdr;
|
|
Elf_Data *syms;
|
|
GElf_Sym sym;
|
|
Elf_Scn *sec, *sec_dynsym, *sec_strndx;
|
|
Elf *elf;
|
|
size_t dynsym_idx;
|
|
int nr = 0;
|
|
|
|
elf = elf_begin(fd, ELF_C_READ_MMAP, NULL);
|
|
if (elf == NULL) {
|
|
if (verbose)
|
|
fprintf(stderr, "%s: cannot read %s ELF file.\n",
|
|
__func__, name);
|
|
goto out_close;
|
|
}
|
|
|
|
if (gelf_getehdr(elf, &ehdr) == NULL) {
|
|
if (verbose)
|
|
fprintf(stderr, "%s: cannot get elf header.\n", __func__);
|
|
goto out_elf_end;
|
|
}
|
|
|
|
/*
|
|
* We need to check if we have a .dynsym, so that we can handle the
|
|
* .plt, synthesizing its symbols, that aren't on the symtabs (be it
|
|
* .dynsym or .symtab)
|
|
*/
|
|
sec_dynsym = elf_section_by_name(elf, &ehdr, &shdr,
|
|
".dynsym", &dynsym_idx);
|
|
if (sec_dynsym != NULL) {
|
|
nr = dso__synthesize_plt_symbols(self, elf, &ehdr,
|
|
sec_dynsym, &shdr,
|
|
dynsym_idx, verbose);
|
|
if (nr < 0)
|
|
goto out_elf_end;
|
|
}
|
|
|
|
/*
|
|
* But if we have a full .symtab (that is a superset of .dynsym) we
|
|
* should add the symbols not in the .dynsyn
|
|
*/
|
|
sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL);
|
|
if (sec == NULL) {
|
|
if (sec_dynsym == NULL)
|
|
goto out_elf_end;
|
|
|
|
sec = sec_dynsym;
|
|
gelf_getshdr(sec, &shdr);
|
|
}
|
|
|
|
syms = elf_getdata(sec, NULL);
|
|
if (syms == NULL)
|
|
goto out_elf_end;
|
|
|
|
sec = elf_getscn(elf, shdr.sh_link);
|
|
if (sec == NULL)
|
|
goto out_elf_end;
|
|
|
|
symstrs = elf_getdata(sec, NULL);
|
|
if (symstrs == NULL)
|
|
goto out_elf_end;
|
|
|
|
sec_strndx = elf_getscn(elf, ehdr.e_shstrndx);
|
|
if (sec_strndx == NULL)
|
|
goto out_elf_end;
|
|
|
|
secstrs = elf_getdata(sec_strndx, NULL);
|
|
if (symstrs == NULL)
|
|
goto out_elf_end;
|
|
|
|
nr_syms = shdr.sh_size / shdr.sh_entsize;
|
|
|
|
memset(&sym, 0, sizeof(sym));
|
|
self->adjust_symbols = (ehdr.e_type == ET_EXEC ||
|
|
elf_section_by_name(elf, &ehdr, &shdr,
|
|
".gnu.prelink_undo",
|
|
NULL) != NULL);
|
|
elf_symtab__for_each_symbol(syms, nr_syms, index, sym) {
|
|
struct symbol *f;
|
|
u64 obj_start;
|
|
struct section *section = NULL;
|
|
int is_label = elf_sym__is_label(&sym);
|
|
const char *section_name;
|
|
|
|
if (!is_label && !elf_sym__is_function(&sym))
|
|
continue;
|
|
|
|
sec = elf_getscn(elf, sym.st_shndx);
|
|
if (!sec)
|
|
goto out_elf_end;
|
|
|
|
gelf_getshdr(sec, &shdr);
|
|
|
|
if (is_label && !elf_sec__is_text(&shdr, secstrs))
|
|
continue;
|
|
|
|
section_name = elf_sec__name(&shdr, secstrs);
|
|
obj_start = sym.st_value;
|
|
|
|
if (self->adjust_symbols) {
|
|
if (verbose >= 2)
|
|
printf("adjusting symbol: st_value: %Lx sh_addr: %Lx sh_offset: %Lx\n",
|
|
(u64)sym.st_value, (u64)shdr.sh_addr, (u64)shdr.sh_offset);
|
|
|
|
sym.st_value -= shdr.sh_addr - shdr.sh_offset;
|
|
}
|
|
|
|
if (mod) {
|
|
section = mod->sections->find_section(mod->sections, section_name);
|
|
if (section)
|
|
sym.st_value += section->vma;
|
|
else {
|
|
fprintf(stderr, "dso__load_sym() module %s lookup of %s failed\n",
|
|
mod->name, section_name);
|
|
goto out_elf_end;
|
|
}
|
|
}
|
|
|
|
f = symbol__new(sym.st_value, sym.st_size,
|
|
elf_sym__name(&sym, symstrs),
|
|
self->sym_priv_size, obj_start, verbose);
|
|
if (!f)
|
|
goto out_elf_end;
|
|
|
|
if (filter && filter(self, f))
|
|
symbol__delete(f, self->sym_priv_size);
|
|
else {
|
|
f->module = mod;
|
|
dso__insert_symbol(self, f);
|
|
nr++;
|
|
}
|
|
}
|
|
|
|
err = nr;
|
|
out_elf_end:
|
|
elf_end(elf);
|
|
out_close:
|
|
return err;
|
|
}
|
|
|
|
int dso__load(struct dso *self, symbol_filter_t filter, int verbose)
|
|
{
|
|
int size = strlen(self->name) + sizeof("/usr/lib/debug%s.debug");
|
|
char *name = malloc(size);
|
|
int variant = 0;
|
|
int ret = -1;
|
|
int fd;
|
|
|
|
if (!name)
|
|
return -1;
|
|
|
|
self->adjust_symbols = 0;
|
|
|
|
if (strncmp(self->name, "/tmp/perf-", 10) == 0)
|
|
return dso__load_perf_map(self, filter, verbose);
|
|
|
|
more:
|
|
do {
|
|
switch (variant) {
|
|
case 0: /* Fedora */
|
|
snprintf(name, size, "/usr/lib/debug%s.debug", self->name);
|
|
break;
|
|
case 1: /* Ubuntu */
|
|
snprintf(name, size, "/usr/lib/debug%s", self->name);
|
|
break;
|
|
case 2: /* Sane people */
|
|
snprintf(name, size, "%s", self->name);
|
|
break;
|
|
|
|
default:
|
|
goto out;
|
|
}
|
|
variant++;
|
|
|
|
fd = open(name, O_RDONLY);
|
|
} while (fd < 0);
|
|
|
|
ret = dso__load_sym(self, fd, name, filter, verbose, NULL);
|
|
close(fd);
|
|
|
|
/*
|
|
* Some people seem to have debuginfo files _WITHOUT_ debug info!?!?
|
|
*/
|
|
if (!ret)
|
|
goto more;
|
|
|
|
out:
|
|
free(name);
|
|
return ret;
|
|
}
|
|
|
|
static int dso__load_module(struct dso *self, struct mod_dso *mods, const char *name,
|
|
symbol_filter_t filter, int verbose)
|
|
{
|
|
struct module *mod = mod_dso__find_module(mods, name);
|
|
int err = 0, fd;
|
|
|
|
if (mod == NULL || !mod->active)
|
|
return err;
|
|
|
|
fd = open(mod->path, O_RDONLY);
|
|
|
|
if (fd < 0)
|
|
return err;
|
|
|
|
err = dso__load_sym(self, fd, name, filter, verbose, mod);
|
|
close(fd);
|
|
|
|
return err;
|
|
}
|
|
|
|
int dso__load_modules(struct dso *self, symbol_filter_t filter, int verbose)
|
|
{
|
|
struct mod_dso *mods = mod_dso__new_dso("modules");
|
|
struct module *pos;
|
|
struct rb_node *next;
|
|
int err;
|
|
|
|
err = mod_dso__load_modules(mods);
|
|
|
|
if (err <= 0)
|
|
return err;
|
|
|
|
/*
|
|
* Iterate over modules, and load active symbols.
|
|
*/
|
|
next = rb_first(&mods->mods);
|
|
while (next) {
|
|
pos = rb_entry(next, struct module, rb_node);
|
|
err = dso__load_module(self, mods, pos->name, filter, verbose);
|
|
|
|
if (err < 0)
|
|
break;
|
|
|
|
next = rb_next(&pos->rb_node);
|
|
}
|
|
|
|
if (err < 0) {
|
|
mod_dso__delete_modules(mods);
|
|
mod_dso__delete_self(mods);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static inline void dso__fill_symbol_holes(struct dso *self)
|
|
{
|
|
struct symbol *prev = NULL;
|
|
struct rb_node *nd;
|
|
|
|
for (nd = rb_last(&self->syms); nd; nd = rb_prev(nd)) {
|
|
struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
|
|
|
|
if (prev) {
|
|
u64 hole = 0;
|
|
int alias = pos->start == prev->start;
|
|
|
|
if (!alias)
|
|
hole = prev->start - pos->end - 1;
|
|
|
|
if (hole || alias) {
|
|
if (alias)
|
|
pos->end = prev->end;
|
|
else if (hole)
|
|
pos->end = prev->start - 1;
|
|
}
|
|
}
|
|
prev = pos;
|
|
}
|
|
}
|
|
|
|
static int dso__load_vmlinux(struct dso *self, const char *vmlinux,
|
|
symbol_filter_t filter, int verbose)
|
|
{
|
|
int err, fd = open(vmlinux, O_RDONLY);
|
|
|
|
if (fd < 0)
|
|
return -1;
|
|
|
|
err = dso__load_sym(self, fd, vmlinux, filter, verbose, NULL);
|
|
|
|
if (err > 0)
|
|
dso__fill_symbol_holes(self);
|
|
|
|
close(fd);
|
|
|
|
return err;
|
|
}
|
|
|
|
int dso__load_kernel(struct dso *self, const char *vmlinux,
|
|
symbol_filter_t filter, int verbose, int modules)
|
|
{
|
|
int err = -1;
|
|
|
|
if (vmlinux) {
|
|
err = dso__load_vmlinux(self, vmlinux, filter, verbose);
|
|
if (err > 0 && modules)
|
|
err = dso__load_modules(self, filter, verbose);
|
|
}
|
|
|
|
if (err <= 0)
|
|
err = dso__load_kallsyms(self, filter, verbose);
|
|
|
|
return err;
|
|
}
|
|
|
|
void symbol__init(void)
|
|
{
|
|
elf_version(EV_CURRENT);
|
|
}
|