[PATCH v6 3/9] elf: Parse gnu properties for the loader
Adhemerval Zanella
adhemerval.zanella@linaro.org
Tue Mar 11 17:09:50 GMT 2025
So it can opt-in for memory sealing.
Checked on x86_64-linux-gnu.
---
elf/rtld.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/elf/rtld.c b/elf/rtld.c
index 00b25c1a73..727e16f233 100644
--- a/elf/rtld.c
+++ b/elf/rtld.c
@@ -1724,11 +1724,15 @@ dl_main (const ElfW(Phdr) *phdr,
/* PT_GNU_RELRO is usually the last phdr. */
size_t cnt = rtld_ehdr->e_phnum;
while (cnt-- > 0)
- if (rtld_phdr[cnt].p_type == PT_GNU_RELRO)
+ switch (rtld_phdr[cnt].p_type)
{
+ case PT_GNU_RELRO:
_dl_rtld_map.l_relro_addr = rtld_phdr[cnt].p_vaddr;
_dl_rtld_map.l_relro_size = rtld_phdr[cnt].p_memsz;
break;
+ case PT_GNU_PROPERTY:
+ _dl_process_pt_gnu_property (&_dl_rtld_map, -1, &rtld_phdr[cnt]);
+ break;
}
/* Add the dynamic linker to the TLS list if it also uses TLS. */
--
2.43.0
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