linux_dsm_epyc7002/arch/x86
Wang YanQing b9aa0b35d8 bpf, x32: Fix bug for BPF_ALU64 | BPF_NEG
The current implementation has two errors:

1: The second xor instruction will clear carry flag which
   is necessary for following sbb instruction.
2: The select coding for sbb instruction is wrong, the coding
   is "sbb dreg_hi,ecx", but what we need is "sbb ecx,dreg_hi".

This patch rewrites the implementation and fixes the errors.

This patch fixes below errors reported by bpf/test_verifier in x32
platform when the jit is enabled:

"
0: (b4) w1 = 4
1: (b4) w2 = 4
2: (1f) r2 -= r1
3: (4f) r2 |= r1
4: (87) r2 = -r2
5: (c7) r2 s>>= 63
6: (5f) r1 &= r2
7: (bf) r0 = r1
8: (95) exit
processed 9 insns (limit 131072), stack depth 0
0: (b4) w1 = 4
1: (b4) w2 = 4
2: (1f) r2 -= r1
3: (4f) r2 |= r1
4: (87) r2 = -r2
5: (c7) r2 s>>= 63
6: (5f) r1 &= r2
7: (bf) r0 = r1
8: (95) exit
processed 9 insns (limit 131072), stack depth 0
......
Summary: 1189 PASSED, 125 SKIPPED, 15 FAILED
"

Signed-off-by: Wang YanQing <udknight@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-05-01 23:40:47 +02:00
..
boot x86/boot: Fix incorrect ifdeffery scope 2019-03-27 14:00:51 +01:00
configs Merge branch 'akpm' (patches from Andrew) 2019-03-07 19:25:37 -08:00
crypto crypto: x86/poly1305 - fix overflow during partial reduction 2019-04-08 14:43:06 +08:00
entry pidfd patches for v5.1-rc1 2019-03-16 13:47:14 -07:00
events perf/x86/amd: Add event map for AMD Family 17h 2019-04-18 14:31:54 +02:00
hyperv x86/hyperv: Prevent potential NULL pointer dereference 2019-03-21 12:24:39 +01:00
ia32 a.out: remove core dumping support 2019-03-05 10:00:35 -08:00
include * Fix for a memory leak introduced during the merge window 2019-04-16 08:52:00 -07:00
kernel Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-04-20 10:05:02 -07:00
kvm KVM: x86: avoid misreporting level-triggered irqs as edge-triggered in tracing 2019-04-16 15:38:08 +02:00
lib x86/lib: Fix indentation issue, remove extra tab 2019-03-21 12:24:38 +01:00
math-emu Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
mm x86/mm/KASLR: Fix the size of the direct mapping section 2019-04-18 10:42:58 +02:00
net bpf, x32: Fix bug for BPF_ALU64 | BPF_NEG 2019-05-01 23:40:47 +02:00
oprofile
pci x86/PCI: Fixup RTIT_BAR of Intel Denverton Trace Hub 2019-02-07 08:43:58 -06:00
platform x86/realmode: Make set_real_mode_mem() static inline 2019-03-29 10:16:27 +01:00
power mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
purgatory kbuild: move bin2c back to scripts/ from scripts/basic/ 2018-07-18 01:18:05 +09:00
ras
realmode x86/realmode: Make set_real_mode_mem() static inline 2019-03-29 10:16:27 +01:00
tools x86: Clean up 'sizeof x' => 'sizeof(x)' 2018-10-29 07:13:28 +01:00
um Merge branch 'timers-2038-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-03-05 14:08:26 -08:00
video
xen Merge branch 'akpm' (patches from Andrew) 2019-03-12 10:39:53 -07:00
.gitignore
Kbuild KVM: x86: Allow Qemu/KVM to use PVH entry point 2018-12-13 13:41:49 -05:00
Kconfig Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-04-20 10:01:11 -07:00
Kconfig.cpu x86/cpu: Create Hygon Dhyana architecture support file 2018-09-27 16:14:05 +02:00
Kconfig.debug efi/x86: Convert x86 EFI earlyprintk into generic earlycon implementation 2019-02-04 08:27:30 +01:00
Makefile x86/retpolines: Disable switch jump tables when retpolines are enabled 2019-03-28 13:39:48 +01:00
Makefile_32.cpu
Makefile.um x86, powerpc: Remove -funit-at-a-time compiler option entirely 2018-12-09 11:55:32 +01:00