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D25319.id73220.diff
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Index: libexec/rtld-elf/rtld.c
===================================================================
--- libexec/rtld-elf/rtld.c
+++ libexec/rtld-elf/rtld.c
@@ -2182,6 +2182,34 @@
}
}
}
+
+static void
+parse_rtld_phdr(Obj_Entry *obj)
+{
+ const Elf_Phdr *ph;
+ Elf_Addr note_start, note_end;
+
+ obj->stack_flags = PF_X | PF_R | PF_W;
+ for (ph = obj->phdr; (const char *)ph < (const char *)obj->phdr +
+ obj->phsize; ph++) {
+ switch (ph->p_type) {
+ case PT_GNU_STACK:
+ obj->stack_flags = ph->p_flags;
+ break;
+ case PT_GNU_RELRO:
+ obj->relro_page = obj->relocbase +
+ trunc_page(ph->p_vaddr);
+ obj->relro_size = round_page(ph->p_memsz);
+ break;
+ case PT_NOTE:
+ note_start = (Elf_Addr)obj->relocbase + ph->p_vaddr;
+ note_end = note_start + ph->p_filesz;
+ digest_notes(obj, note_start, note_end);
+ break;
+ }
+ }
+}
+
/*
* Initialize the dynamic linker. The argument is the address at which
* the dynamic linker has been mapped into memory. The primary task of
@@ -2251,6 +2279,9 @@
/* Replace the path with a dynamically allocated copy. */
obj_rtld.path = xstrdup(ld_path_rtld);
+ parse_rtld_phdr(&obj_rtld);
+ obj_enforce_relro(&obj_rtld);
+
r_debug.r_brk = r_debug_state;
r_debug.r_state = RT_CONSISTENT;
}
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D25319: rtld: parse rtld own phdr, notes, and enforce relro.
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