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powerpc/64: Add module check for ELF ABI version 

Override the generic module ELF check to provide a check for the ELF ABI
version. This becomes important if we allow big-endian ELF ABI V2 builds
but it doesn't hurt to check now.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221128041539.1742489-3-npiggin@gmail.com
This commit is contained in:
Nicholas Piggin 2022-11-28 14:15:37 +10:00 committed by Michael Ellerman
parent f9231a996e
commit de3d098dd1
1 changed files with 10 additions and 0 deletions
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10
arch/powerpc/kernel/module_64.c
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@ -31,6 +31,16 @@
this, and makes other things simpler. Anton?
--RR. */
bool module_elf_check_arch(Elf_Ehdr *hdr)
{
unsigned long abi_level = hdr->e_flags & 0x3;
if (IS_ENABLED(CONFIG_PPC64_ELF_ABI_V2))
return abi_level == 2;
else
return abi_level < 2;
}
#ifdef CONFIG_PPC64_ELF_ABI_V2
static func_desc_t func_desc(unsigned long addr)