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(unexec): Dump the .rodata section from memory

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under IRIX6.5 in order to be able to unexec with gcc.
This commit is contained in:
Karl Heuer 1999-06-13 22:48:46 +00:00
parent 9c332a804d
commit 914eeff99a
1 changed files with 24 additions and 12 deletions
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36
src/unexsgi.c
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@ -412,6 +412,7 @@ Filesz Memsz Flags Align
*/ */
#include <config.h>
#include <sys/types.h> #include <sys/types.h>
#include <stdio.h> #include <stdio.h>
#include <sys/stat.h> #include <sys/stat.h>
@ -758,15 +759,17 @@ unexec (new_name, old_name, data_start, bss_start, entry_address)
NEW_SECTION_H (nn).sh_size = 0; NEW_SECTION_H (nn).sh_size = 0;
} }
else else
memcpy (&NEW_SECTION_H (nn), &OLD_SECTION_H (n), {
old_file_h->e_shentsize); memcpy (&NEW_SECTION_H (nn), &OLD_SECTION_H (n),
old_file_h->e_shentsize);
/* Any section that was original placed AFTER the bss /* Any section that was original placed AFTER the bss
section must now be adjusted by NEW_OFFSETS_SHIFT. */ section must now be adjusted by NEW_OFFSETS_SHIFT. */
if (NEW_SECTION_H (nn).sh_offset >= new_data2_offset)
NEW_SECTION_H (nn).sh_offset += new_offsets_shift;
}
if (NEW_SECTION_H (nn).sh_offset >= new_data2_offset)
NEW_SECTION_H (nn).sh_offset += new_offsets_shift;
/* If any section hdr refers to the section after the new .data /* If any section hdr refers to the section after the new .data
section, make it refer to next one because we have inserted section, make it refer to next one because we have inserted
a new section in between. */ a new section in between. */
@ -786,9 +789,18 @@ unexec (new_name, old_name, data_start, bss_start, entry_address)
/* Write out the sections. .data and .data1 (and data2, called /* Write out the sections. .data and .data1 (and data2, called
".data" in the strings table) get copied from the current process ".data" in the strings table) get copied from the current process
instead of the old file. */ instead of the old file. */
if (!strcmp (old_section_names + NEW_SECTION_H (n).sh_name, ".data") if (!strcmp (old_section_names + NEW_SECTION_H (nn).sh_name, ".data")
|| !strcmp (old_section_names + NEW_SECTION_H (n).sh_name, ".data1") || !strcmp (old_section_names + NEW_SECTION_H (nn).sh_name, ".data1")
|| !strcmp (old_section_names + NEW_SECTION_H (n).sh_name, ".got")) #ifdef IRIX6_5
/* Under IRIX 6.5 gcc places objects with adresses relative to
shared symbols in the section .rodata, which are adjusted at
startup time. Unfortunately they aren't adjusted after unexec,
so with this configuration we must get .rodata also from memory.
Do any other configurations need this, too?
<Wolfgang.Glas@hfm.tu-graz.ac.at> 1999-06-08. */
|| !strcmp (old_section_names + NEW_SECTION_H (nn).sh_name, ".rodata")
#endif
|| !strcmp (old_section_names + NEW_SECTION_H (nn).sh_name, ".got"))
src = (caddr_t) OLD_SECTION_H (n).sh_addr; src = (caddr_t) OLD_SECTION_H (n).sh_addr;
else else
src = old_base + OLD_SECTION_H (n).sh_offset; src = old_base + OLD_SECTION_H (n).sh_offset;
@ -859,9 +871,9 @@ unexec (new_name, old_name, data_start, bss_start, entry_address)
+ new_base); + new_base);
for (; num--; sym++) for (; num--; sym++)
{ {
/* don't patch special section indices. */
if (sym->st_shndx == SHN_UNDEF if (sym->st_shndx == SHN_UNDEF
|| sym->st_shndx == SHN_ABS || sym->st_shndx >= SHN_LORESERVE)
|| sym->st_shndx == SHN_COMMON)
continue; continue;
PATCH_INDEX (sym->st_shndx); PATCH_INDEX (sym->st_shndx);