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authorKees Cook <keescook@chromium.org>2020-08-21 12:43:08 -0700
committerIngo Molnar <mingo@kernel.org>2020-09-01 10:03:18 +0200
commitd1c0272bc1c068f8c2cb3d1b395173602b0df6e7 (patch)
tree70f65335caa4a4998231baea05cdc514d8389edd /arch/x86/boot/compressed/vmlinux.lds.S
parent7cf891a40057f851af74e68bacb01b90bd775b5d (diff)
x86/boot/compressed: Remove, discard, or assert for unwanted sections
In preparation for warning on orphan sections, stop the linker from generating the .eh_frame* sections, discard unwanted non-zero-sized generated sections, and enforce other expected-to-be-zero-sized sections (since discarding them might hide problems with them suddenly gaining unexpected entries). Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/20200821194310.3089815-28-keescook@chromium.org
Diffstat (limited to 'arch/x86/boot/compressed/vmlinux.lds.S')
-rw-r--r--arch/x86/boot/compressed/vmlinux.lds.S14
1 files changed, 12 insertions, 2 deletions
diff --git a/arch/x86/boot/compressed/vmlinux.lds.S b/arch/x86/boot/compressed/vmlinux.lds.S
index ca544a16724b..02f6feb0e55b 100644
--- a/arch/x86/boot/compressed/vmlinux.lds.S
+++ b/arch/x86/boot/compressed/vmlinux.lds.S
@@ -72,6 +72,11 @@ SECTIONS
ELF_DETAILS
DISCARDS
+ /DISCARD/ : {
+ *(.dynamic) *(.dynsym) *(.dynstr) *(.dynbss)
+ *(.hash) *(.gnu.hash)
+ *(.note.*)
+ }
.got.plt (INFO) : {
*(.got.plt)
@@ -93,13 +98,18 @@ SECTIONS
}
ASSERT(SIZEOF(.got) == 0, "Unexpected GOT entries detected!")
+ .plt : {
+ *(.plt) *(.plt.*)
+ }
+ ASSERT(SIZEOF(.plt) == 0, "Unexpected run-time procedure linkages detected!")
+
.rel.dyn : {
- *(.rel.*)
+ *(.rel.*) *(.rel_*)
}
ASSERT(SIZEOF(.rel.dyn) == 0, "Unexpected run-time relocations (.rel) detected!")
.rela.dyn : {
- *(.rela.*)
+ *(.rela.*) *(.rela_*)
}
ASSERT(SIZEOF(.rela.dyn) == 0, "Unexpected run-time relocations (.rela) detected!")
}