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authorLinus Torvalds <torvalds@linux-foundation.org>2022-01-13 03:31:19 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2022-01-13 03:31:19 +0300
commit64ad9461521b1a357846ef6cedc4bccd48a046e0 (patch)
treef134404b6c6df89198a4a2f2be6fef21af133c73 /samples
parent8e5b0adeea19309c8ce0e3c9119061554973efa9 (diff)
parent9cdbeec4096804083944d05da96bbaf59a1eb4f9 (diff)
downloadlinux-64ad9461521b1a357846ef6cedc4bccd48a046e0.tar.xz
Merge tag 'x86_core_for_v5.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 core updates from Borislav Petkov: - Get rid of all the .fixup sections because this generates misleading/wrong stacktraces and confuse RELIABLE_STACKTRACE and LIVEPATCH as the backtrace misses the function which is being fixed up. - Add Straight Line Speculation mitigation support which uses a new compiler switch -mharden-sls= which sticks an INT3 after a RET or an indirect branch in order to block speculation after them. Reportedly, CPUs do speculate behind such insns. - The usual set of cleanups and improvements * tag 'x86_core_for_v5.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (32 commits) x86/entry_32: Fix segment exceptions objtool: Remove .fixup handling x86: Remove .fixup section x86/word-at-a-time: Remove .fixup usage x86/usercopy: Remove .fixup usage x86/usercopy_32: Simplify __copy_user_intel_nocache() x86/sgx: Remove .fixup usage x86/checksum_32: Remove .fixup usage x86/vmx: Remove .fixup usage x86/kvm: Remove .fixup usage x86/segment: Remove .fixup usage x86/fpu: Remove .fixup usage x86/xen: Remove .fixup usage x86/uaccess: Remove .fixup usage x86/futex: Remove .fixup usage x86/msr: Remove .fixup usage x86/extable: Extend extable functionality x86/entry_32: Remove .fixup usage x86/entry_64: Remove .fixup usage x86/copy_mc_64: Remove .fixup usage ...
Diffstat (limited to 'samples')
-rw-r--r--samples/ftrace/ftrace-direct-modify.c4
-rw-r--r--samples/ftrace/ftrace-direct-too.c2
-rw-r--r--samples/ftrace/ftrace-direct.c2
3 files changed, 4 insertions, 4 deletions
diff --git a/samples/ftrace/ftrace-direct-modify.c b/samples/ftrace/ftrace-direct-modify.c
index 2877cb053a82..2c7c31893551 100644
--- a/samples/ftrace/ftrace-direct-modify.c
+++ b/samples/ftrace/ftrace-direct-modify.c
@@ -34,7 +34,7 @@ asm (
" call my_direct_func1\n"
" leave\n"
" .size my_tramp1, .-my_tramp1\n"
-" ret\n"
+ ASM_RET
" .type my_tramp2, @function\n"
" .globl my_tramp2\n"
" my_tramp2:"
@@ -42,7 +42,7 @@ asm (
" movq %rsp, %rbp\n"
" call my_direct_func2\n"
" leave\n"
-" ret\n"
+ ASM_RET
" .size my_tramp2, .-my_tramp2\n"
" .popsection\n"
);
diff --git a/samples/ftrace/ftrace-direct-too.c b/samples/ftrace/ftrace-direct-too.c
index b97e5ed46233..c93fb0e95173 100644
--- a/samples/ftrace/ftrace-direct-too.c
+++ b/samples/ftrace/ftrace-direct-too.c
@@ -34,7 +34,7 @@ asm (
" popq %rsi\n"
" popq %rdi\n"
" leave\n"
-" ret\n"
+ ASM_RET
" .size my_tramp, .-my_tramp\n"
" .popsection\n"
);
diff --git a/samples/ftrace/ftrace-direct.c b/samples/ftrace/ftrace-direct.c
index c918b13edb49..8b551e503a48 100644
--- a/samples/ftrace/ftrace-direct.c
+++ b/samples/ftrace/ftrace-direct.c
@@ -27,7 +27,7 @@ asm (
" call my_direct_func\n"
" popq %rdi\n"
" leave\n"
-" ret\n"
+ ASM_RET
" .size my_tramp, .-my_tramp\n"
" .popsection\n"
);