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(unexec): Don't alter the info field of SHT_SYMTAB and SHT_DYNSYM sections.

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Richard M. Stallman 1994-08-23 21:35:23 +00:00
parent b16234d848
commit 8917361f1f
1 changed files with 13 additions and 10 deletions
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23
src/unexelf.c
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@ -725,20 +725,23 @@ unexec (new_name, old_name, data_start, bss_start, entry_address)
/* If any section hdr refers to the section after the new .data
section, make it refer to next one because we have inserted
a new section in between. */
a new section in between. */
PATCH_INDEX (NEW_SECTION_H (nn).sh_link);
PATCH_INDEX (NEW_SECTION_H (nn).sh_info);
/* Now, start to copy the content of sections. */
/* For symbol tables, info is a symbol table index,
so don't change it. */
if (NEW_SECTION_H (nn).sh_type != SHT_SYMTAB
&& NEW_SECTION_H (nn).sh_type != SHT_DYNSYM)
PATCH_INDEX (NEW_SECTION_H (nn).sh_info);
/* Now, start to copy the content of sections. */
if (NEW_SECTION_H (nn).sh_type == SHT_NULL
|| NEW_SECTION_H (nn).sh_type == SHT_NOBITS)
continue;
/* Write out the sections. .data and .data1 (and data2, called
* ".data" in the strings table) get copied from the current process
* instead of the old file.
*/
".data" in the strings table) get copied from the current process
instead of the old file. */
if (!strcmp (old_section_names + NEW_SECTION_H (n).sh_name, ".data")
|| !strcmp ((old_section_names + NEW_SECTION_H (n).sh_name),
".data1"))
@ -749,7 +752,7 @@ unexec (new_name, old_name, data_start, bss_start, entry_address)
memcpy (NEW_SECTION_H (nn).sh_offset + new_base, src,
NEW_SECTION_H (nn).sh_size);
/* If it is the symbol table, its st_shndx field needs to be patched. */
/* If it is the symbol table, its st_shndx field needs to be patched. */
if (NEW_SECTION_H (nn).sh_type == SHT_SYMTAB
|| NEW_SECTION_H (nn).sh_type == SHT_DYNSYM)
{
@ -769,7 +772,7 @@ unexec (new_name, old_name, data_start, bss_start, entry_address)
}
}
/* Update the symbol values of _edata and _end. */
/* Update the symbol values of _edata and _end. */
for (n = new_file_h->e_shnum - 1; n; n--)
{
byte *symnames;
@ -789,7 +792,7 @@ unexec (new_name, old_name, data_start, bss_start, entry_address)
memcpy (&symp->st_value, &new_bss_addr, sizeof (new_bss_addr));
}
/* Close the files and make the new file executable */
/* Close the files and make the new file executable. */
if (close (old_file))
fatal ("Can't close (%s): errno %d\n", old_name, errno);