On 6/03/2016 7:57 AM, Dimitry Andric wrote:
Author: dim
Date: Sun Mar 6 15:57:43 2016
New Revision: 296428
URL: https://svnweb.freebsd.org/changeset/base/296428
Log:
Since kernel modules can now contain sections of type SHT_AMD64_UNWIND,
the boot loader should not skip over these anymore while loading images.
Otherwise the kernel can still panic when it doesn't find the .eh_frame
section belonging to the .rela.eh_frame section.
Unfortunately this will require installing boot loaders from sys/boot
before attempting to boot with a new kernel.
what happens to someone who doesn't replace their bootblocks?
Or is this just the loader?
The general way we have handled this sort of thing in the past is that
we do something
that produces a nagging message for a decent time before it becomes
mandatory.
I don't like the idea of people being caught unaware by this..
Can you please give a more detailed description of what happens?
Reviewed by: kib
MFC after: 2 weeks
X-MFC-With: r296419
Modified:
head/sys/boot/common/load_elf_obj.c
Modified: head/sys/boot/common/load_elf_obj.c
==============================================================================
--- head/sys/boot/common/load_elf_obj.c Sun Mar 6 14:37:49 2016
(r296427)
+++ head/sys/boot/common/load_elf_obj.c Sun Mar 6 15:57:43 2016
(r296428)
@@ -221,6 +221,9 @@ __elfN(obj_loadimage)(struct preloaded_f
switch (shdr[i].sh_type) {
case SHT_PROGBITS:
case SHT_NOBITS:
+#if defined(__i386__) || defined(__amd64__)
+ case SHT_AMD64_UNWIND:
+#endif
lastaddr = roundup(lastaddr, shdr[i].sh_addralign);
shdr[i].sh_addr = (Elf_Addr)lastaddr;
lastaddr += shdr[i].sh_size;
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