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Peter Zijlstra 1a6f74429c x86/retpoline: Create a retpoline thunk array 
Stick all the retpolines in a single symbol and have the individual
thunks as inner labels, this should guarantee thunk order and layout.

Previously there were 16 (or rather 15 without rsp) separate symbols and
a toolchain might reasonably expect it could displace them however it
liked, with disregard for their relative position.

However, now they're part of a larger symbol. Any change to their
relative position would disrupt this larger _array symbol and thus not
be sound.

This is the same reasoning used for data symbols. On their own there
is no guarantee about their relative position wrt to one aonther, but
we're still able to do arrays because an array as a whole is a single
larger symbol.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Borislav Petkov <bp@suse.de>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Tested-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/r/20211026120310.169659320@infradead.org
2021-10-28 23:25:27 +02:00
..
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
atomic64_32.c
atomic64_386_32.S x86/alternative: Merge include files 2021-03-11 15:58:02 +01:00
atomic64_cx8_32.S x86/alternative: Merge include files 2021-03-11 15:58:02 +01:00
cache-smp.c smp: Remove smp_call_function() and on_each_cpu() return values 2019-06-23 14:26:26 +02:00
checksum_32.S i386: propagate the calling conventions change down to csum_partial_copy_generic() 2020-08-20 15:45:18 -04:00
clear_page_64.S x86/asm: Change all ENTRY+ENDPROC to SYM_FUNC_* 2019-10-18 11:58:33 +02:00
cmdline.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
cmpxchg8b_emu.S x86/asm: Change all ENTRY+ENDPROC to SYM_FUNC_* 2019-10-18 11:58:33 +02:00
cmpxchg16b_emu.S x86/asm: Change all ENTRY+ENDPROC to SYM_FUNC_* 2019-10-18 11:58:33 +02:00
copy_mc_64.S x86, libnvdimm/test: Remove COPY_MC_TEST 2020-10-26 18:08:35 +01:00
copy_mc.c x86, libnvdimm/test: Remove COPY_MC_TEST 2020-10-26 18:08:35 +01:00
copy_page_64.S x86/alternative: Merge include files 2021-03-11 15:58:02 +01:00
copy_user_64.S x86/alternative: Merge include files 2021-03-11 15:58:02 +01:00
cpu.c x86/lib/cpu: Address missing prototypes warning 2019-08-08 08:25:53 +02:00
csum-copy_64.S amd64: switch csum_partial_copy_generic() to new calling conventions 2020-08-20 15:45:22 -04:00
csum-partial_64.c x86/lib: Fix indentation issue, remove extra tab 2019-03-21 12:24:38 +01:00
csum-wrappers_64.c amd64: switch csum_partial_copy_generic() to new calling conventions 2020-08-20 15:45:22 -04:00
delay.c x86/delay: Introduce TPAUSE delay 2020-05-07 16:06:20 +02:00
error-inject.c x86/asm: Mark all top level asm statements as .text 2019-04-19 17:46:55 +02:00
getuser.S Merge branch 'work.set_fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-10-22 09:59:21 -07:00
hweight.S x86/asm: Change all ENTRY+ENDPROC to SYM_FUNC_* 2019-10-18 11:58:33 +02:00
inat.c x86/insn: Add a __ignore_sync_check__ marker 2021-03-15 11:00:57 +01:00
insn-eval.c x86/insn: Extend error reporting from insn_fetch_from_user[_inatomic]() 2021-06-15 11:39:30 +02:00
insn.c x86/insn, tools/x86: Fix undefined behavior due to potential unaligned accesses 2021-09-24 12:37:38 +02:00
iomap_copy_64.S x86/asm: Change all ENTRY+ENDPROC to SYM_FUNC_* 2019-10-18 11:58:33 +02:00
iomem.c x86: explicitly align IO accesses in memcpy_{to,from}io 2019-02-01 09:07:48 -08:00
kaslr.c x86/kaslr: Fix incorrect i8254 outb() parameters 2019-01-11 21:35:47 +01:00
Makefile x86: Add support for 0x22/0x23 port I/O configuration space 2021-08-10 23:31:43 +02:00
memcpy_32.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
memcpy_64.S x86/alternative: Merge include files 2021-03-11 15:58:02 +01:00
memmove_64.S x86/alternative: Merge include files 2021-03-11 15:58:02 +01:00
memset_64.S x86/alternative: Merge include files 2021-03-11 15:58:02 +01:00
misc.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mmx_32.c x86: Fix various typos in comments 2021-03-18 15:31:53 +01:00
msr-reg-export.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
msr-reg.S x86/asm: Change all ENTRY+ENDPROC to SYM_FUNC_* 2019-10-18 11:58:33 +02:00
msr-smp.c x86/msr: Fix wr/rdmsr_safe_regs_on_cpu() prototypes 2021-03-22 21:37:03 +01:00
msr.c x86/msr: Make locally used functions static 2021-04-08 11:57:40 +02:00
pc-conf-reg.c x86: Add support for 0x22/0x23 port I/O configuration space 2021-08-10 23:31:43 +02:00
putuser.S Merge branch 'work.set_fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-10-22 09:59:21 -07:00
retpoline.S x86/retpoline: Create a retpoline thunk array 2021-10-28 23:25:27 +02:00
string_32.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
strstr_32.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
usercopy_32.c docs/core-api/mm: fix user memory accessors formatting 2019-03-05 21:07:20 -08:00
usercopy_64.c * Extend the recovery from MCE in kernel space also to processes which 2020-10-12 10:14:38 -07:00
usercopy.c x86/uaccess: Document copy_from_user_nmi() 2020-11-18 13:19:01 +01:00
x86-opcode-map.txt x86/insn: Add Control-flow Enforcement (CET) instructions to the opcode map 2020-03-26 12:21:40 +01:00