must keep SYMS until all_symbols_read is called to give the linker time to
copy the symbol information. */
+struct sym_aux
+{
+ uint32_t slot;
+ unsigned id;
+};
+
struct plugin_symtab
{
int nsyms;
- uint32_t *slots;
+ struct sym_aux *aux;
struct ld_plugin_symbol *syms;
+ unsigned id;
};
/* All that we have to remember about a file. */
Returns the address of the next entry. */
static char *
-parse_table_entry (char *p, struct ld_plugin_symbol *entry, uint32_t *slot)
+parse_table_entry (char *p, struct ld_plugin_symbol *entry,
+ struct sym_aux *aux)
{
unsigned char t;
enum ld_plugin_symbol_kind translate_kind[] =
LDPV_HIDDEN
};
- entry->name = strdup (p);
+ entry->name = xstrdup (p);
while (*p)
p++;
p++;
if (strlen (entry->comdat_key) == 0)
entry->comdat_key = NULL;
else
- entry->comdat_key = strdup (entry->comdat_key);
+ entry->comdat_key = xstrdup (entry->comdat_key);
t = *p;
check (t <= 4, LDPL_FATAL, "invalid symbol kind found");
entry->size = *(uint64_t *) p;
p += 8;
- *slot = *(uint32_t *) p;
+ aux->slot = *(uint32_t *) p;
p += 4;
entry->resolution = LDPR_UNKNOWN;
return p;
}
-/* Return the section in ELF that is named NAME. */
+#define LTO_SECTION_PREFIX ".gnu.lto_.symtab"
+
+/* Translate the IL symbol table SYMTAB. Append the slots and symbols to OUT. */
+
+static void
+translate (Elf_Data *symtab, struct plugin_symtab *out)
+{
+ struct sym_aux *aux;
+ char *data = symtab->d_buf;
+ char *end = data + symtab->d_size;
+ struct ld_plugin_symbol *syms = NULL;
+ int n, len;
+
+ /* This overestimates the output buffer sizes, but at least
+ the algorithm is O(1) now. */
+
+ len = (end - data)/8 + out->nsyms + 1;
+ syms = xrealloc (out->syms, len * sizeof (struct ld_plugin_symbol));
+ aux = xrealloc (out->aux, len * sizeof (struct sym_aux));
+
+ for (n = out->nsyms; data < end; n++)
+ {
+ aux[n].id = out->id;
+ data = parse_table_entry (data, &syms[n], &aux[n]);
+ }
+
+ assert(n < len);
+
+ out->nsyms = n;
+ out->syms = syms;
+ out->aux = aux;
+}
+
+/* Process all lto symtabs of file ELF. */
-static Elf_Scn *
-get_section (Elf *elf, const char *name)
+static int
+process_symtab (Elf *elf, struct plugin_symtab *out)
{
+ int found = 0;
Elf_Scn *section = 0;
GElf_Ehdr header;
GElf_Ehdr *t = gelf_getehdr (elf, &header);
if (t == NULL)
- return NULL;
+ return 0;
assert (t == &header);
while ((section = elf_nextscn(elf, section)) != 0)
assert (tshdr == &shdr);
t = elf_strptr (elf, header.e_shstrndx, shdr.sh_name);
assert (t != NULL);
- if (strcmp (t, name) == 0)
- return section;
- }
- return NULL;
-}
-
-/* Returns the IL symbol table of file ELF. */
-
-static Elf_Data *
-get_symtab (Elf *elf)
-{
- Elf_Data *data = 0;
- Elf_Scn *section = get_section (elf, ".gnu.lto_.symtab");
- if (!section)
- return NULL;
-
- data = elf_getdata (section, data);
- assert (data);
- return data;
-}
-
-/* Translate the IL symbol table SYMTAB. Write the slots and symbols in OUT. */
-
-static void
-translate (Elf_Data *symtab, struct plugin_symtab *out)
-{
- uint32_t *slots = NULL;
- char *data = symtab->d_buf;
- char *end = data + symtab->d_size;
- struct ld_plugin_symbol *syms = NULL;
- int n = 0;
-
- while (data < end)
- {
- n++;
- syms = realloc (syms, n * sizeof (struct ld_plugin_symbol));
- check (syms, LDPL_FATAL, "could not allocate memory");
- slots = realloc (slots, n * sizeof (uint32_t));
- check (slots, LDPL_FATAL, "could not allocate memory");
- data = parse_table_entry (data, &syms[n - 1], &slots[n - 1]);
+ if (strncmp (t, LTO_SECTION_PREFIX, strlen (LTO_SECTION_PREFIX)) == 0)
+ {
+ char *s = strrchr (t, '.');
+ if (s)
+ sscanf (s, ".%x", &out->id);
+ translate (elf_getdata (section, NULL), out);
+ found = 1;
+ }
}
-
- out->nsyms = n;
- out->syms = syms;
- out->slots = slots;
+ return found;
}
/* Free all memory that is no longer needed after writing the symbol
{
struct plugin_file_info *info = &claimed_files[i];
struct plugin_symtab *symtab = &info->symtab;
- free (symtab->slots);
+ free (symtab->aux);
free (info->name);
}
if (arguments_file_name)
free (arguments_file_name);
arguments_file_name = NULL;
-
- if (resolution_file)
- {
- free (resolution_file);
- resolution_file = NULL;
- }
}
/* Writes the relocations to disk. */
unsigned int i;
FILE *f;
+ check (resolution_file, LDPL_FATAL, "resolution file not specified");
f = fopen (resolution_file, "w");
check (f, LDPL_FATAL, "could not open file");
struct ld_plugin_symbol *syms = symtab->syms;
unsigned j;
- assert (syms);
get_symbols (info->handle, symtab->nsyms, syms);
fprintf (f, "%s %d\n", info->name, info->symtab.nsyms);
for (j = 0; j < info->symtab.nsyms; j++)
{
- uint32_t slot = symtab->slots[j];
+ uint32_t slot = symtab->aux[j].slot;
unsigned int resolution = syms[j].resolution;
- fprintf (f, "%d %s %s\n", slot, lto_resolution_str[resolution], syms[j].name);
+ fprintf (f, "%d %x %s %s\n", slot, symtab->aux[j].id,
+ lto_resolution_str[resolution], syms[j].name);
}
}
fclose (f);
static void
add_output_files (FILE *f)
{
- char fname[1000]; /* FIXME: Remove this restriction. */
-
for (;;)
{
+ const unsigned piece = 32;
+ char *buf, *s = xmalloc (piece);
size_t len;
- char *s = fgets (fname, sizeof (fname), f);
- if (!s)
- break;
+ buf = s;
+cont:
+ if (!fgets (buf, piece, f))
+ break;
len = strlen (s);
- check (s[len - 1] == '\n', LDPL_FATAL, "file name too long");
+ if (s[len - 1] != '\n')
+ {
+ s = xrealloc (s, len + piece);
+ buf = s + len;
+ goto cont;
+ }
s[len - 1] = '\0';
num_output_files++;
- output_files = realloc (output_files, num_output_files * sizeof (char *));
- output_files[num_output_files - 1] = strdup (s);
+ output_files
+ = xrealloc (output_files, num_output_files * sizeof (char *));
+ output_files[num_output_files - 1] = s;
add_input_file (output_files[num_output_files - 1]);
}
}
all_symbols_read_handler (void)
{
unsigned i;
- unsigned num_lto_args = num_claimed_files + lto_wrapper_num_args + 2 + 1;
+ unsigned num_lto_args = num_claimed_files + lto_wrapper_num_args + 1;
char **lto_argv;
const char **lto_arg_ptr;
if (num_claimed_files == 0)
return LDPS_OK;
}
- lto_argv = (char **) calloc (sizeof (char *), num_lto_args);
+ lto_argv = (char **) xcalloc (sizeof (char *), num_lto_args);
lto_arg_ptr = (const char **) lto_argv;
assert (lto_wrapper_argv);
- resolution_file = make_temp_file ("");
-
write_resolution ();
free_1 ();
for (i = 0; i < lto_wrapper_num_args; i++)
*lto_arg_ptr++ = lto_wrapper_argv[i];
- *lto_arg_ptr++ = "-fresolution";
- *lto_arg_ptr++ = resolution_file;
-
for (i = 0; i < num_claimed_files; i++)
{
struct plugin_file_info *info = &claimed_files[i];
static enum ld_plugin_status
cleanup_handler (void)
{
+ unsigned int i;
int t;
if (debug)
check (t == 0, LDPL_FATAL, "could not unlink arguments file");
}
- if (resolution_file)
+ for (i = 0; i < num_output_files; i++)
{
- t = unlink (resolution_file);
- check (t == 0, LDPL_FATAL, "could not unlink resolution file");
+ t = unlink (output_files[i]);
+ check (t == 0, LDPL_FATAL, "could not unlink output file");
}
free_2 ();
enum ld_plugin_status status;
Elf *elf;
struct plugin_file_info lto_file;
- Elf_Data *symtab;
+
+ memset (<o_file, 0, sizeof (struct plugin_file_info));
if (file->offset != 0)
{
}
else
{
- lto_file.name = strdup (file->name);
+ lto_file.name = xstrdup (file->name);
elf = elf_begin (file->fd, ELF_C_READ, NULL);
}
lto_file.handle = file->handle;
*claimed = 0;
- if (!elf)
+ if (!elf || !process_symtab (elf, <o_file.symtab))
goto err;
- symtab = get_symtab (elf);
- if (!symtab)
- goto err;
-
- translate (symtab, <o_file.symtab);
-
status = add_symbols (file->handle, lto_file.symtab.nsyms,
lto_file.symtab.syms);
check (status == LDPS_OK, LDPL_FATAL, "could not add symbols");
*claimed = 1;
num_claimed_files++;
claimed_files =
- realloc (claimed_files,
- num_claimed_files * sizeof (struct plugin_file_info));
+ xrealloc (claimed_files,
+ num_claimed_files * sizeof (struct plugin_file_info));
claimed_files[num_claimed_files - 1] = lto_file;
goto cleanup;
else if (!strncmp (option, "-pass-through=", strlen("-pass-through=")))
{
num_pass_through_items++;
- pass_through_items = realloc (pass_through_items,
- num_pass_through_items * sizeof (char *));
+ pass_through_items = xrealloc (pass_through_items,
+ num_pass_through_items * sizeof (char *));
pass_through_items[num_pass_through_items - 1] =
- strdup (option + strlen ("-pass-through="));
+ xstrdup (option + strlen ("-pass-through="));
}
else
{
int size;
+ char *opt = xstrdup (option);
lto_wrapper_num_args += 1;
size = lto_wrapper_num_args * sizeof (char *);
- lto_wrapper_argv = (char **) realloc (lto_wrapper_argv, size);
- lto_wrapper_argv[lto_wrapper_num_args - 1] = strdup(option);
+ lto_wrapper_argv = (char **) xrealloc (lto_wrapper_argv, size);
+ lto_wrapper_argv[lto_wrapper_num_args - 1] = opt;
+ if (strncmp (option, "-fresolution=", sizeof ("-fresolution=") - 1) == 0)
+ resolution_file = opt + sizeof ("-fresolution=") - 1;
}
}
projects / thirdparty / gcc.git / blobdiff