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ldso: process RELR only for non-FDPIC archs

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the way RELR is applied is not a meaningful operation for FDPIC (there
is no single "base" address). it seems unlikely RELR would ever be
added for FDPIC, but if it ever is, the behavior and possibly data
format will need to be different, so guard against calling the
non-FDPIC code.
This commit is contained in:
Rich Felker
2022-08-02 17:29:01 -04:00
parent d32dadd60e
commit bf99258564
1 changed files with 2 additions and 1 deletions
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ldso/dynlink.c
+2 -1
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@@ -1375,7 +1375,8 @@ static void reloc_all(struct dso *p)
2+(dyn[DT_PLTREL]==DT_RELA));
do_relocs(p, laddr(p, dyn[DT_REL]), dyn[DT_RELSZ], 2);
do_relocs(p, laddr(p, dyn[DT_RELA]), dyn[DT_RELASZ], 3);
do_relr_relocs(p, laddr(p, dyn[DT_RELR]), dyn[DT_RELRSZ]);
if (!DL_FDPIC)
do_relr_relocs(p, laddr(p, dyn[DT_RELR]), dyn[DT_RELRSZ]);
if (head != &ldso && p->relro_start != p->relro_end) {
long ret = __syscall(SYS_mprotect, laddr(p, p->relro_start),