Since the introduction of automatic immutable from the kernel, the munmap()

of ld.so boot.text region is now (silently) failing because the region is
contained within the text LOAD, which is immutable.  So create a new btext
LOAD with flags PF_X|PF_R|PF_OPENBSD_MUTABLE, and place all boot.text objects
in there.  This LOAD must also be page-aligned so it doesn't skip unmapping
some of the object region, previously it was hilariously unaligned.
ok kettenis and guenther seemed to like it also
This one is for powerpc64 and a modified version of the diff deraadt@ mailed
out to make sure the LOADs are in increasing address order.

diff --git a/libexec/ld.so/powerpc64/ld.script b/libexec/ld.so/powerpc64/ld.script
index 96614bc..5e45466 100644 (file)
--- a/libexec/ld.so/powerpc64/ld.script
+++ b/libexec/ld.so/powerpc64/ld.script
@@ -1,6 +1,7 @@
 PHDRS
 {
        rodata  PT_LOAD FILEHDR PHDRS FLAGS (4);
+       btext   PT_LOAD FLAGS (0x08000005);
        text    PT_LOAD;
        data    PT_LOAD;
        random  PT_OPENBSD_RANDOMIZE;
@@ -23,11 +24,12 @@ SECTIONS
     . = ALIGN(0x10000);
     .boot.text :
     {
+       . = ALIGN(0x1000);
        boot_text_start = .;
        *(.boot.text)
+       . = ALIGN(0x1000);
        boot_text_end = .;
-    } :text
-    . = ALIGN(0x1000);
+    } :btext
     .text      : { *(.text .text.*) } :text
 
     /* RELRO DATA */