diff options
| author | Mark Kettenis <kettenis@cvs.openbsd.org> | 2020-07-18 13:16:33 +0000 |
|---|---|---|
| committer | Mark Kettenis <kettenis@cvs.openbsd.org> | 2020-07-18 13:16:33 +0000 |
| commit | 996316ddcd1fc353a6ffabf383fd771a03568975 (patch) | |
| tree | f2efcaeaef1c305d94efb97589cde683e6e98683 /sys/arch/powerpc64/conf | |
| parent | fb5ebc8d61699e6b0dc96233f1804bab8446ed1d (diff) | |
Improve kernel linker script. Split binary in a .text, .rodata and .data
segment, but continue to cover these with a single PT_LOAD segment such
that we can continue to load kernels from the firmware Linux kernel.
This is important since our bootloader is a stripped down OpenBSD kernel
as well.
Proper page protections are installed by pmap_bootstrap(). This allows us
to add "relro" sections to the .rodata segment.
Diffstat (limited to 'sys/arch/powerpc64/conf')
| -rw-r--r-- | sys/arch/powerpc64/conf/ld.script | 34 |
1 files changed, 30 insertions, 4 deletions
diff --git a/sys/arch/powerpc64/conf/ld.script b/sys/arch/powerpc64/conf/ld.script index 0b5bd8125d9..1103644328f 100644 --- a/sys/arch/powerpc64/conf/ld.script +++ b/sys/arch/powerpc64/conf/ld.script @@ -1,4 +1,4 @@ -/* $OpenBSD: ld.script,v 1.3 2020/06/06 22:36:22 kettenis Exp $ */ +/* $OpenBSD: ld.script,v 1.4 2020/07/18 13:16:32 kettenis Exp $ */ /* * Copyright (c) 2013 Mark Kettenis <kettenis@openbsd.org> @@ -22,6 +22,7 @@ PHDRS { text PT_LOAD; dynamic PT_DYNAMIC; + openbsd_randomize PT_OPENBSD_RANDOMIZE; } SECTIONS @@ -30,18 +31,35 @@ SECTIONS .text : { *(.text) - *(.rodata*) } :text PROVIDE (etext = .); PROVIDE (_etext = .); - .hash : { *(.hash) } + . = ALIGN(4096); + .rela.dyn : { *(.rela.dyn) } + + .dynamic : + { + *(.dynamic) + } :dynamic :text + + .rodata : + { + *(.rodata) + *(.data.rel.ro) + } :text + + .openbsd.randomdata : + { + *(.openbsd.randomdata) + } :openbsd_randomize :text + PROVIDE (_erodata = .); . = ALIGN(4096); .data : { *(.data) - } + } :text . = ALIGN(4096); .got : { *(.got) } @@ -54,4 +72,12 @@ SECTIONS } PROVIDE (end = .); PROVIDE (_end = .); + + /DISCARD/ : + { + *(.dynsym) + *(.dynstr) + *(.gnu.hash) + *(.hash) + } } |