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[23.128.96.18]) by mx.google.com with ESMTP id d6si1586724edo.493.2020.05.14.04.23.32; Thu, 14 May 2020 04:23:55 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=fail header.i=@infradead.org header.s=merlin.20170209 header.b="fm/AP6vd"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726202AbgENLWI (ORCPT + 99 others); Thu, 14 May 2020 07:22:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34340 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725925AbgENLWH (ORCPT ); Thu, 14 May 2020 07:22:07 -0400 Received: from merlin.infradead.org (unknown [IPv6:2001:8b0:10b:1231::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3A743C061A0C for ; Thu, 14 May 2020 04:22:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=In-Reply-To:Content-Transfer-Encoding: Content-Type:MIME-Version:References:Message-ID:Subject:Cc:To:From:Date: Sender:Reply-To:Content-ID:Content-Description; bh=ftsVDocK0rc+NTyQA8hwSXAcjJrHOYtEYId0ITmf2Sg=; b=fm/AP6vdxmTmwFlfkbK2di5QNz edP8ZPsgAt1Wh6/bYdctFgvaXutQzVjSJMXbxXjqJsouetuRu+6NiajLrw5iYVDfT/NnwmWWmMi9m nJRc7QBWXREYZnyxpOvgUUDpdSeGIugnB21/kiE0WpeuJbLZ4G9LNSRTDs2V2X6MQPVIJ32wvOux2 Rb6Ip0p0Uji/HgETrhhCcGxRdOcMN+xg7XrpOlivZLASaoybPuuY4aFV7wNFTov/bV6sIstJVZqpf JqtbSIC2dM86dYzLX9gdIsDw3zyBqvMLSjphwTprk0cfqsQi1RDxy6v52cXzSHiw6iwxG+cGzPChl +FH2YPoQ==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jZBvt-00057u-Dv; Thu, 14 May 2020 11:21:45 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id DF40E3060F3; Thu, 14 May 2020 13:21:42 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id C8E9E2B892DDA; Thu, 14 May 2020 13:21:42 +0200 (CEST) Date: Thu, 14 May 2020 13:21:42 +0200 From: Peter Zijlstra To: Marco Elver Cc: Will Deacon , LKML , Thomas Gleixner , "Paul E. McKenney" , Ingo Molnar , Dmitry Vyukov Subject: Re: [PATCH v5 00/18] Rework READ_ONCE() to improve codegen Message-ID: <20200514112142.GV2978@hirez.programming.kicks-ass.net> References: <20200512190755.GL2957@hirez.programming.kicks-ass.net> <20200513111057.GN2957@hirez.programming.kicks-ass.net> <20200513123243.GO2957@hirez.programming.kicks-ass.net> <20200513124021.GB20278@willie-the-truck> <20200513132440.GN2978@hirez.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="xHFwDpU9dbj6ez1V" Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --xHFwDpU9dbj6ez1V Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit On Wed, May 13, 2020 at 03:58:30PM +0200, Marco Elver wrote: > On Wed, 13 May 2020 at 15:24, Peter Zijlstra wrote: > > > > On Wed, May 13, 2020 at 03:15:55PM +0200, Marco Elver wrote: > > > So far so good, except: both __no_sanitize_or_inline and > > > __no_kcsan_or_inline *do* avoid KCSAN instrumenting plain accesses, it > > > just doesn't avoid explicit kcsan_check calls, like those in > > > READ/WRITE_ONCE if KCSAN is enabled for the compilation unit. That's > > > just because macros won't be redefined just for __no_sanitize > > > functions. Similarly, READ_ONCE_NOCHECK does work as expected, and its > > > access is unchecked. > > > > > > This will have the expected result: > > > __no_sanitize_or_inline void foo(void) { x++; } // no data races reported > > > > > > This will not work as expected: > > > __no_sanitize_or_inline void foo(void) { READ_ONCE(x); } // data > > > races are reported > > > > > > All this could be fixed if GCC devs would finally take my patch to > > > make -fsanitize=thread distinguish volatile [1], but then we have to > > > wait ~years for the new compilers to reach us. So please don't hold > > > your breath for this one any time soon. > > > [1] https://gcc.gnu.org/pipermail/gcc-patches/2020-April/544452.html > > > > Right, but that does not address the much larger issue of the attribute > > vs inline tranwreck :/ > > Could you check if Clang is equally broken for you? I think GCC and > Clang have differing behaviour on this. No idea what it takes to fix > GCC though. So I have some good and some maybe not so good news. Given the patch below (on top of tglx's entry-v5-the-rest tag); I did find that I could actually build alternative.o for gcc-{8,9,10} and indeed clang-10. Any earlier gcc (I tried, 5,6,7) does not build: ../arch/x86/include/asm/ptrace.h:126:28: error: inlining failed in call to always_inline ‘user_mode’: function attribute mismatch I dumped the poke_int3_handler output using objdump, find the attached files. It looks like clang-10 doesn't want to turn UBSAN off :/ The GCC files look OK, no funny calls in those. (the config has KASAN/UBSAN on, it looks like KCSAN and KASAN are mutually exclusive) --- diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c index 77c83833d91e..06d8db612efc 100644 --- a/arch/x86/kernel/alternative.c +++ b/arch/x86/kernel/alternative.c @@ -990,7 +990,7 @@ static __always_inline int patch_cmp(const void *key, const void *elt) return 0; } -int noinstr poke_int3_handler(struct pt_regs *regs) +int noinstr __no_kcsan __no_sanitize_address __no_sanitize_undefined poke_int3_handler(struct pt_regs *regs) { struct bp_patching_desc *desc; struct text_poke_loc *tp; diff --git a/include/linux/compiler-clang.h b/include/linux/compiler-clang.h index 2cb42d8bdedc..5e83aada6553 100644 --- a/include/linux/compiler-clang.h +++ b/include/linux/compiler-clang.h @@ -15,6 +15,13 @@ /* all clang versions usable with the kernel support KASAN ABI version 5 */ #define KASAN_ABI_VERSION 5 +#if __has_feature(undefined_sanitizer) +#define __no_sanitize_undefined \ + __attribute__((no_sanitize("undefined"))) +#else +#define __no_sanitize_undefined +#endif + #if __has_feature(address_sanitizer) || __has_feature(hwaddress_sanitizer) /* Emulate GCC's __SANITIZE_ADDRESS__ flag */ #define __SANITIZE_ADDRESS__ diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h index 7dd4e0349ef3..8196a121a78e 100644 --- a/include/linux/compiler-gcc.h +++ b/include/linux/compiler-gcc.h @@ -138,6 +138,12 @@ #define KASAN_ABI_VERSION 3 #endif +#if __has_attribute(__no_sanitize_undefined__) +#define __no_sanitize_undefined __attribute__((no_sanitize_undefined)) +#else +#define __no_sanitize_undefined +#endif + #if __has_attribute(__no_sanitize_address__) #define __no_sanitize_address __attribute__((no_sanitize_address)) #else --xHFwDpU9dbj6ez1V Content-Type: text/plain; charset=us-ascii Content-Disposition: attachment; filename="poke_int3_handler-gcc8.asm" 0000 0000000000000000 : 0000 0: f6 87 88 00 00 00 03 testb $0x3,0x88(%rdi) 0007 7: 75 5d jne 66 0009 9: 48 8b 35 00 00 00 00 mov 0x0(%rip),%rsi # 10 000c c: R_X86_64_PC32 .bss+0x105c 0010 10: 48 85 f6 test %rsi,%rsi 0013 13: 74 51 je 66 0015 15: 8b 46 0c mov 0xc(%rsi),%eax 0018 18: 48 8d 56 0c lea 0xc(%rsi),%rdx 001c 1c: 85 c0 test %eax,%eax 001e 1e: 74 46 je 66 0020 20: 8d 48 01 lea 0x1(%rax),%ecx 0023 23: f0 0f b1 4e 0c lock cmpxchg %ecx,0xc(%rsi) 0028 28: 75 2d jne 57 002a 2a: 48 8b 97 80 00 00 00 mov 0x80(%rdi),%rdx 0031 31: 48 63 46 08 movslq 0x8(%rsi),%rax 0035 35: 48 8b 0e mov (%rsi),%rcx 0038 38: 4c 8d 42 ff lea -0x1(%rdx),%r8 003c 3c: 83 f8 01 cmp $0x1,%eax 003f 3f: 7f 28 jg 69 0041 41: 4c 63 09 movslq (%rcx),%r9 0044 44: 31 c0 xor %eax,%eax 0046 46: 49 81 c1 00 00 00 00 add $0x0,%r9 0049 49: R_X86_64_32S _stext 004d 4d: 4d 39 c8 cmp %r9,%r8 0050 50: 74 48 je 9a 0052 52: f0 ff 4e 0c lock decl 0xc(%rsi) 0056 56: c3 retq 0057 57: 85 c0 test %eax,%eax 0059 59: 74 0b je 66 005b 5b: 8d 48 01 lea 0x1(%rax),%ecx 005e 5e: f0 0f b1 0a lock cmpxchg %ecx,(%rdx) 0062 62: 74 c6 je 2a 0064 64: eb f1 jmp 57 0066 66: 31 c0 xor %eax,%eax 0068 68: c3 retq 0069 69: 49 89 cb mov %rcx,%r11 006c 6c: 49 89 c2 mov %rax,%r10 006f 6f: 49 d1 ea shr %r10 0072 72: 4c 89 d1 mov %r10,%rcx 0075 75: 48 c1 e1 04 shl $0x4,%rcx 0079 79: 4c 01 d9 add %r11,%rcx 007c 7c: 4c 63 09 movslq (%rcx),%r9 007f 7f: 49 81 c1 00 00 00 00 add $0x0,%r9 0082 82: R_X86_64_32S _stext 0086 86: 4d 39 c8 cmp %r9,%r8 0089 89: 0f 82 95 00 00 00 jb 124 008f 8f: 0f 87 84 00 00 00 ja 119 0095 95: 48 85 c9 test %rcx,%rcx 0098 98: 74 29 je c3 009a 9a: 0f b6 41 08 movzbl 0x8(%rcx),%eax 009e 9e: 44 8d 48 34 lea 0x34(%rax),%r9d 00a2 a2: 41 80 f9 1f cmp $0x1f,%r9b 00a6 a6: 76 02 jbe aa 00a8 a8: 0f 0b ud2 00aa aa: 45 0f b6 c9 movzbl %r9b,%r9d 00ae ae: 4d 0f be 89 00 00 00 movsbq 0x0(%r9),%r9 00b5 b5: 00 00b2 b2: R_X86_64_32S .rodata+0x620 00b6 b6: 4d 01 c8 add %r9,%r8 00b9 b9: 3c e8 cmp $0xe8,%al 00bb bb: 74 2a je e7 00bd bd: 77 08 ja c7 00bf bf: 3c cc cmp $0xcc,%al 00c1 c1: 75 e5 jne a8 00c3 c3: 31 c0 xor %eax,%eax 00c5 c5: eb 8b jmp 52 00c7 c7: 3c e9 cmp $0xe9,%al 00c9 c9: 74 04 je cf 00cb cb: 3c eb cmp $0xeb,%al 00cd cd: 75 d9 jne a8 00cf cf: 4c 63 49 04 movslq 0x4(%rcx),%r9 00d3 d3: b8 01 00 00 00 mov $0x1,%eax 00d8 d8: 4d 01 c8 add %r9,%r8 00db db: 4c 89 87 80 00 00 00 mov %r8,0x80(%rdi) 00e2 e2: e9 6b ff ff ff jmpq 52 00e7 e7: 4c 63 49 04 movslq 0x4(%rcx),%r9 00eb eb: 48 8b 87 98 00 00 00 mov 0x98(%rdi),%rax 00f2 f2: 48 83 c2 04 add $0x4,%rdx 00f6 f6: 48 8d 48 f8 lea -0x8(%rax),%rcx 00fa fa: 4d 01 c8 add %r9,%r8 00fd fd: 48 89 8f 98 00 00 00 mov %rcx,0x98(%rdi) 0104 104: 48 89 50 f8 mov %rdx,-0x8(%rax) 0108 108: b8 01 00 00 00 mov $0x1,%eax 010d 10d: 4c 89 87 80 00 00 00 mov %r8,0x80(%rdi) 0114 114: e9 39 ff ff ff jmpq 52 0119 119: 4c 8d 50 ff lea -0x1(%rax),%r10 011d 11d: 4c 8d 59 10 lea 0x10(%rcx),%r11 0121 121: 49 d1 ea shr %r10 0124 124: 4c 89 d0 mov %r10,%rax 0127 127: 4d 85 d2 test %r10,%r10 012a 12a: 0f 85 3c ff ff ff jne 6c 0130 130: e9 1d ff ff ff jmpq 52 --xHFwDpU9dbj6ez1V Content-Type: text/plain; charset=us-ascii Content-Disposition: attachment; filename="poke_int3_handler-gcc9.asm" 0000 0000000000000000 : 0000 0: f6 87 88 00 00 00 03 testb $0x3,0x88(%rdi) 0007 7: 75 4d jne 56 0009 9: 48 8b 15 00 00 00 00 mov 0x0(%rip),%rdx # 10 000c c: R_X86_64_PC32 .bss+0x105c 0010 10: 48 85 d2 test %rdx,%rdx 0013 13: 74 41 je 56 0015 15: 8b 42 0c mov 0xc(%rdx),%eax 0018 18: 48 8d 4a 0c lea 0xc(%rdx),%rcx 001c 1c: 85 c0 test %eax,%eax 001e 1e: 74 36 je 56 0020 20: 8d 70 01 lea 0x1(%rax),%esi 0023 23: f0 0f b1 31 lock cmpxchg %esi,(%rcx) 0027 27: 75 f3 jne 1c 0029 29: 4c 8b 8f 80 00 00 00 mov 0x80(%rdi),%r9 0030 30: 48 63 42 08 movslq 0x8(%rdx),%rax 0034 34: 48 8b 32 mov (%rdx),%rsi 0037 37: 49 8d 49 ff lea -0x1(%r9),%rcx 003b 3b: 83 f8 01 cmp $0x1,%eax 003e 3e: 7f 19 jg 59 0040 40: 4c 63 06 movslq (%rsi),%r8 0043 43: 31 c0 xor %eax,%eax 0045 45: 49 81 c0 00 00 00 00 add $0x0,%r8 0048 48: R_X86_64_32S _stext 004c 4c: 4c 39 c1 cmp %r8,%rcx 004f 4f: 74 39 je 8a 0051 51: f0 ff 4a 0c lock decl 0xc(%rdx) 0055 55: c3 retq 0056 56: 31 c0 xor %eax,%eax 0058 58: c3 retq 0059 59: 49 89 f3 mov %rsi,%r11 005c 5c: 49 89 c2 mov %rax,%r10 005f 5f: 49 d1 ea shr %r10 0062 62: 4c 89 d6 mov %r10,%rsi 0065 65: 48 c1 e6 04 shl $0x4,%rsi 0069 69: 4c 01 de add %r11,%rsi 006c 6c: 4c 63 06 movslq (%rsi),%r8 006f 6f: 49 81 c0 00 00 00 00 add $0x0,%r8 0072 72: R_X86_64_32S _stext 0076 76: 4c 39 c1 cmp %r8,%rcx 0079 79: 0f 82 a2 00 00 00 jb 121 007f 7f: 0f 87 83 00 00 00 ja 108 0085 85: 48 85 f6 test %rsi,%rsi 0088 88: 74 45 je cf 008a 8a: 0f b6 46 08 movzbl 0x8(%rsi),%eax 008e 8e: 44 8d 40 34 lea 0x34(%rax),%r8d 0092 92: 41 80 f8 1f cmp $0x1f,%r8b 0096 96: 76 02 jbe 9a 0098 98: 0f 0b ud2 009a 9a: 45 0f b6 c0 movzbl %r8b,%r8d 009e 9e: 4d 0f be 80 00 00 00 movsbq 0x0(%r8),%r8 00a5 a5: 00 00a2 a2: R_X86_64_32S .rodata+0x620 00a6 a6: 4c 01 c1 add %r8,%rcx 00a9 a9: 3c e8 cmp $0xe8,%al 00ab ab: 74 29 je d6 00ad ad: 76 1c jbe cb 00af af: 83 e0 fd and $0xfffffffd,%eax 00b2 b2: 3c e9 cmp $0xe9,%al 00b4 b4: 75 e2 jne 98 00b6 b6: 48 63 46 04 movslq 0x4(%rsi),%rax 00ba ba: 48 01 c1 add %rax,%rcx 00bd bd: b8 01 00 00 00 mov $0x1,%eax 00c2 c2: 48 89 8f 80 00 00 00 mov %rcx,0x80(%rdi) 00c9 c9: eb 86 jmp 51 00cb cb: 3c cc cmp $0xcc,%al 00cd cd: 75 c9 jne 98 00cf cf: 31 c0 xor %eax,%eax 00d1 d1: e9 7b ff ff ff jmpq 51 00d6 d6: 48 63 46 04 movslq 0x4(%rsi),%rax 00da da: 49 83 c1 04 add $0x4,%r9 00de de: 48 01 c1 add %rax,%rcx 00e1 e1: 48 8b 87 98 00 00 00 mov 0x98(%rdi),%rax 00e8 e8: 48 8d 70 f8 lea -0x8(%rax),%rsi 00ec ec: 48 89 b7 98 00 00 00 mov %rsi,0x98(%rdi) 00f3 f3: 4c 89 48 f8 mov %r9,-0x8(%rax) 00f7 f7: b8 01 00 00 00 mov $0x1,%eax 00fc fc: 48 89 8f 80 00 00 00 mov %rcx,0x80(%rdi) 0103 103: e9 49 ff ff ff jmpq 51 0108 108: 48 83 e8 01 sub $0x1,%rax 010c 10c: 4c 8d 5e 10 lea 0x10(%rsi),%r11 0110 110: 48 d1 e8 shr %rax 0113 113: 48 85 c0 test %rax,%rax 0116 116: 0f 85 40 ff ff ff jne 5c 011c 11c: e9 30 ff ff ff jmpq 51 0121 121: 4c 89 d0 mov %r10,%rax 0124 124: eb ed jmp 113 --xHFwDpU9dbj6ez1V Content-Type: text/plain; charset=us-ascii Content-Disposition: attachment; filename="poke_int3_handler-gcc10.asm" 0000 0000000000000000 : 0000 0: f6 87 88 00 00 00 03 testb $0x3,0x88(%rdi) 0007 7: 75 4d jne 56 0009 9: 48 8b 15 00 00 00 00 mov 0x0(%rip),%rdx # 10 000c c: R_X86_64_PC32 .bss+0x105c 0010 10: 48 85 d2 test %rdx,%rdx 0013 13: 74 41 je 56 0015 15: 8b 42 0c mov 0xc(%rdx),%eax 0018 18: 48 8d 4a 0c lea 0xc(%rdx),%rcx 001c 1c: 85 c0 test %eax,%eax 001e 1e: 74 36 je 56 0020 20: 8d 70 01 lea 0x1(%rax),%esi 0023 23: f0 0f b1 31 lock cmpxchg %esi,(%rcx) 0027 27: 75 f3 jne 1c 0029 29: 4c 8b 8f 80 00 00 00 mov 0x80(%rdi),%r9 0030 30: 48 63 42 08 movslq 0x8(%rdx),%rax 0034 34: 48 8b 32 mov (%rdx),%rsi 0037 37: 49 8d 49 ff lea -0x1(%r9),%rcx 003b 3b: 83 f8 01 cmp $0x1,%eax 003e 3e: 7f 19 jg 59 0040 40: 4c 63 06 movslq (%rsi),%r8 0043 43: 31 c0 xor %eax,%eax 0045 45: 49 81 c0 00 00 00 00 add $0x0,%r8 0048 48: R_X86_64_32S _stext 004c 4c: 4c 39 c1 cmp %r8,%rcx 004f 4f: 74 39 je 8a 0051 51: f0 ff 4a 0c lock decl 0xc(%rdx) 0055 55: c3 retq 0056 56: 31 c0 xor %eax,%eax 0058 58: c3 retq 0059 59: 49 89 f3 mov %rsi,%r11 005c 5c: 49 89 c2 mov %rax,%r10 005f 5f: 49 d1 ea shr %r10 0062 62: 4c 89 d6 mov %r10,%rsi 0065 65: 48 c1 e6 04 shl $0x4,%rsi 0069 69: 4c 01 de add %r11,%rsi 006c 6c: 4c 63 06 movslq (%rsi),%r8 006f 6f: 49 81 c0 00 00 00 00 add $0x0,%r8 0072 72: R_X86_64_32S _stext 0076 76: 4c 39 c1 cmp %r8,%rcx 0079 79: 0f 82 a2 00 00 00 jb 121 007f 7f: 0f 87 83 00 00 00 ja 108 0085 85: 48 85 f6 test %rsi,%rsi 0088 88: 74 45 je cf 008a 8a: 0f b6 46 08 movzbl 0x8(%rsi),%eax 008e 8e: 44 8d 40 34 lea 0x34(%rax),%r8d 0092 92: 41 80 f8 1f cmp $0x1f,%r8b 0096 96: 76 02 jbe 9a 0098 98: 0f 0b ud2 009a 9a: 45 0f b6 c0 movzbl %r8b,%r8d 009e 9e: 4d 0f be 80 00 00 00 movsbq 0x0(%r8),%r8 00a5 a5: 00 00a2 a2: R_X86_64_32S .rodata+0x620 00a6 a6: 4c 01 c1 add %r8,%rcx 00a9 a9: 3c e8 cmp $0xe8,%al 00ab ab: 74 29 je d6 00ad ad: 76 1c jbe cb 00af af: 83 e0 fd and $0xfffffffd,%eax 00b2 b2: 3c e9 cmp $0xe9,%al 00b4 b4: 75 e2 jne 98 00b6 b6: 48 63 46 04 movslq 0x4(%rsi),%rax 00ba ba: 48 01 c1 add %rax,%rcx 00bd bd: b8 01 00 00 00 mov $0x1,%eax 00c2 c2: 48 89 8f 80 00 00 00 mov %rcx,0x80(%rdi) 00c9 c9: eb 86 jmp 51 00cb cb: 3c cc cmp $0xcc,%al 00cd cd: 75 c9 jne 98 00cf cf: 31 c0 xor %eax,%eax 00d1 d1: e9 7b ff ff ff jmpq 51 00d6 d6: 48 63 46 04 movslq 0x4(%rsi),%rax 00da da: 49 83 c1 04 add $0x4,%r9 00de de: 48 01 c1 add %rax,%rcx 00e1 e1: 48 8b 87 98 00 00 00 mov 0x98(%rdi),%rax 00e8 e8: 48 8d 70 f8 lea -0x8(%rax),%rsi 00ec ec: 48 89 b7 98 00 00 00 mov %rsi,0x98(%rdi) 00f3 f3: 4c 89 48 f8 mov %r9,-0x8(%rax) 00f7 f7: b8 01 00 00 00 mov $0x1,%eax 00fc fc: 48 89 8f 80 00 00 00 mov %rcx,0x80(%rdi) 0103 103: e9 49 ff ff ff jmpq 51 0108 108: 48 83 e8 01 sub $0x1,%rax 010c 10c: 4c 8d 5e 10 lea 0x10(%rsi),%r11 0110 110: 48 d1 e8 shr %rax 0113 113: 48 85 c0 test %rax,%rax 0116 116: 0f 85 40 ff ff ff jne 5c 011c 11c: e9 30 ff ff ff jmpq 51 0121 121: 4c 89 d0 mov %r10,%rax 0124 124: eb ed jmp 113 --xHFwDpU9dbj6ez1V Content-Type: text/plain; charset=us-ascii Content-Disposition: attachment; filename="poke_int3_handler-clang10.asm" 0000 0000000000000000 : 0000 0: 55 push %rbp 0001 1: 48 89 e5 mov %rsp,%rbp 0004 4: 41 57 push %r15 0006 6: 41 56 push %r14 0008 8: 41 55 push %r13 000a a: 41 54 push %r12 000c c: 53 push %rbx 000d d: 45 31 ff xor %r15d,%r15d 0010 10: f6 87 88 00 00 00 03 testb $0x3,0x88(%rdi) 0017 17: 0f 85 3a 01 00 00 jne 157 001d 1d: 4c 8b 2d 00 00 00 00 mov 0x0(%rip),%r13 # 24 0020 20: R_X86_64_PC32 .bss+0x4 0024 24: 4d 85 ed test %r13,%r13 0027 27: 0f 84 2a 01 00 00 je 157 002d 2d: 45 8b 65 0c mov 0xc(%r13),%r12d 0031 31: 45 85 e4 test %r12d,%r12d 0034 34: 0f 84 1d 01 00 00 je 157 003a 3a: 49 89 fe mov %rdi,%r14 003d 3d: 0f 1f 00 nopl (%rax) 0040 40: 41 8d 4c 24 01 lea 0x1(%r12),%ecx 0045 45: 31 db xor %ebx,%ebx 0047 47: 44 89 e0 mov %r12d,%eax 004a 4a: f0 41 0f b1 4d 0c lock cmpxchg %ecx,0xc(%r13) 0050 50: 0f 94 c3 sete %bl 0053 53: 41 89 c4 mov %eax,%r12d 0056 56: 80 fb 01 cmp $0x1,%bl 0059 59: 77 0e ja 69 005b 5b: 84 db test %bl,%bl 005d 5d: 75 2c jne 8b 005f 5f: 45 85 e4 test %r12d,%r12d 0062 62: 75 dc jne 40 0064 64: e9 ee 00 00 00 jmpq 157 0069 69: 48 c7 c7 00 00 00 00 mov $0x0,%rdi 006c 6c: R_X86_64_32S .data+0x160 0070 70: 48 89 de mov %rbx,%rsi 0073 73: e8 00 00 00 00 callq 78 0074 74: R_X86_64_PLT32 __ubsan_handle_load_invalid_value-0x4 0078 78: 48 c7 c7 00 00 00 00 mov $0x0,%rdi 007b 7b: R_X86_64_32S .data+0x180 007f 7f: 48 89 de mov %rbx,%rsi 0082 82: e8 00 00 00 00 callq 87 0083 83: R_X86_64_PLT32 __ubsan_handle_load_invalid_value-0x4 0087 87: 84 db test %bl,%bl 0089 89: 74 d4 je 5f 008b 8b: 49 8b 86 80 00 00 00 mov 0x80(%r14),%rax 0092 92: 48 83 c0 ff add $0xffffffffffffffff,%rax 0096 96: 41 83 7d 08 02 cmpl $0x2,0x8(%r13) 009b 9b: 0f 8d c4 00 00 00 jge 165 00a1 a1: 49 8b 4d 00 mov 0x0(%r13),%rcx 00a5 a5: 48 63 11 movslq (%rcx),%rdx 00a8 a8: 48 8d 92 00 00 00 00 lea 0x0(%rdx),%rdx 00ab ab: R_X86_64_32S _stext 00af af: 45 31 ff xor %r15d,%r15d 00b2 b2: 48 39 c2 cmp %rax,%rdx 00b5 b5: 0f 85 97 00 00 00 jne 152 00bb bb: 8a 59 08 mov 0x8(%rcx),%bl 00be be: 31 d2 xor %edx,%edx 00c0 c0: 80 fb e8 cmp $0xe8,%bl 00c3 c3: 7f 0c jg d1 00c5 c5: 80 fb cc cmp $0xcc,%bl 00c8 c8: 74 1f je e9 00ca ca: 80 fb e8 cmp $0xe8,%bl 00cd cd: 74 13 je e2 00cf cf: eb 1d jmp ee 00d1 d1: 80 fb e9 cmp $0xe9,%bl 00d4 d4: 74 0c je e2 00d6 d6: 80 fb eb cmp $0xeb,%bl 00d9 d9: 75 13 jne ee 00db db: ba 02 00 00 00 mov $0x2,%edx 00e0 e0: eb 0c jmp ee 00e2 e2: ba 05 00 00 00 mov $0x5,%edx 00e7 e7: eb 05 jmp ee 00e9 e9: ba 01 00 00 00 mov $0x1,%edx 00ee ee: 48 01 d0 add %rdx,%rax 00f1 f1: 8a 51 08 mov 0x8(%rcx),%dl 00f4 f4: 80 fa e8 cmp $0xe8,%dl 00f7 f7: 7f 3b jg 134 00f9 f9: 45 31 ff xor %r15d,%r15d 00fc fc: 80 fa cc cmp $0xcc,%dl 00ff ff: 74 51 je 152 0101 101: 80 fa e8 cmp $0xe8,%dl 0104 104: 0f 85 b1 00 00 00 jne 1bb 010a 10a: 48 63 49 04 movslq 0x4(%rcx),%rcx 010e 10e: 48 01 c1 add %rax,%rcx 0111 111: 49 8b 86 80 00 00 00 mov 0x80(%r14),%rax 0118 118: 49 8b 96 98 00 00 00 mov 0x98(%r14),%rdx 011f 11f: 48 83 c0 04 add $0x4,%rax 0123 123: 48 8d 72 f8 lea -0x8(%rdx),%rsi 0127 127: 49 89 b6 98 00 00 00 mov %rsi,0x98(%r14) 012e 12e: 48 89 42 f8 mov %rax,-0x8(%rdx) 0132 132: eb 11 jmp 145 0134 134: 80 fa e9 cmp $0xe9,%dl 0137 137: 74 05 je 13e 0139 139: 80 fa eb cmp $0xeb,%dl 013c 13c: 75 7d jne 1bb 013e 13e: 48 63 49 04 movslq 0x4(%rcx),%rcx 0142 142: 48 01 c1 add %rax,%rcx 0145 145: 49 89 8e 80 00 00 00 mov %rcx,0x80(%r14) 014c 14c: 41 bf 01 00 00 00 mov $0x1,%r15d 0152 152: f0 41 ff 4d 0c lock decl 0xc(%r13) 0157 157: 44 89 f8 mov %r15d,%eax 015a 15a: 5b pop %rbx 015b 15b: 41 5c pop %r12 015d 15d: 41 5d pop %r13 015f 15f: 41 5e pop %r14 0161 161: 41 5f pop %r15 0163 163: 5d pop %rbp 0164 164: c3 retq 0165 165: 49 63 55 08 movslq 0x8(%r13),%rdx 0169 169: 45 31 ff xor %r15d,%r15d 016c 16c: 48 85 d2 test %rdx,%rdx 016f 16f: 74 e1 je 152 0171 171: 49 8b 4d 00 mov 0x0(%r13),%rcx 0175 175: eb 05 jmp 17c 0177 177: 48 d1 ea shr %rdx 017a 17a: 74 d6 je 152 017c 17c: 48 89 d6 mov %rdx,%rsi 017f 17f: 48 83 e6 fe and $0xfffffffffffffffe,%rsi 0183 183: 48 63 3c f1 movslq (%rcx,%rsi,8),%rdi 0187 187: 48 8d bf 00 00 00 00 lea 0x0(%rdi),%rdi 018a 18a: R_X86_64_32S _stext 018e 18e: 48 39 c7 cmp %rax,%rdi 0191 191: 77 e4 ja 177 0193 193: 48 8d 0c f1 lea (%rcx,%rsi,8),%rcx 0197 197: 48 63 31 movslq (%rcx),%rsi 019a 19a: 48 8d b6 00 00 00 00 lea 0x0(%rsi),%rsi 019d 19d: R_X86_64_32S _stext 01a1 1a1: 48 39 c6 cmp %rax,%rsi 01a4 1a4: 73 0a jae 1b0 01a6 1a6: 48 83 c1 10 add $0x10,%rcx 01aa 1aa: 48 83 c2 ff add $0xffffffffffffffff,%rdx 01ae 1ae: eb c7 jmp 177 01b0 1b0: 48 85 c9 test %rcx,%rcx 01b3 1b3: 0f 85 02 ff ff ff jne bb 01b9 1b9: eb 97 jmp 152 01bb 1bb: 0f 0b ud2 01bd 1bd: 48 c7 c7 00 00 00 00 mov $0x0,%rdi 01c0 1c0: R_X86_64_32S .data+0xc0 01c4 1c4: e8 00 00 00 00 callq 1c9 01c5 1c5: R_X86_64_PLT32 __ubsan_handle_builtin_unreachable-0x4 --xHFwDpU9dbj6ez1V--