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Message-ID: <20250329200656.GA127272@ax162> Date: Sat, 29 Mar 2025 13:06:56 -0700 From: Nathan Chancellor <nathan@...nel.org> To: Josh Poimboeuf <jpoimboe@...nel.org> Cc: kernel test robot <lkp@...el.com>, llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org, x86@...nel.org, Ingo Molnar <mingo@...nel.org> Subject: Re: [tip:objtool/urgent 9/23] vmlinux.o: warning: objtool: cdns_mrvl_xspi_setup_clock: unexpected end of section .text.cdns_mrvl_xspi_setup_clock On Fri, Mar 28, 2025 at 09:46:06PM -0700, Josh Poimboeuf wrote: > On Fri, Mar 28, 2025 at 04:24:49PM -0700, Nathan Chancellor wrote: > > vmlinux.o: warning: objtool: synaptics_report_mt_data: unexpected end of section .text.synaptics_report_mt_data > > vmlinux.o: warning: objtool: synaptics_report_mt_data+0x33e: (branch) > > vmlinux.o: warning: objtool: synaptics_report_mt_data+0x254: (branch) > > vmlinux.o: warning: objtool: synaptics_report_mt_data+0x1d4: (branch) > > vmlinux.o: warning: objtool: synaptics_report_mt_data+0x1b8: (branch) > > vmlinux.o: warning: objtool: synaptics_report_mt_data+0x156: (branch) > > vmlinux.o: warning: objtool: synaptics_report_mt_data+0x13a: (branch) > > vmlinux.o: warning: objtool: synaptics_report_mt_data+0xda: (branch) > > vmlinux.o: warning: objtool: synaptics_report_mt_data+0xbe: (branch) > > vmlinux.o: warning: objtool: synaptics_report_mt_data+0x63: (branch) > > vmlinux.o: warning: objtool: synaptics_report_mt_data+0x48: (branch) > > vmlinux.o: warning: objtool: synaptics_report_mt_data+0x0: <=== (sym) > > ./tools/objtool/objtool --hacks=jump_label --hacks=noinstr --static-call --uaccess --noinstr --link vmlinux.o.orig -o vmlinux.o > > Nice! Can you share the disassembly of the function? Sure thing! > objdump -drw -j .text.synaptics_report_mt_data vmlinux.o.orig 0000000000000000 <synaptics_report_mt_data>: 0: 55 push %rbp 1: 48 89 e5 mov %rsp,%rbp 4: 41 57 push %r15 6: 41 56 push %r14 8: 41 55 push %r13 a: 41 54 push %r12 c: 53 push %rbx d: 48 83 e4 f0 and $0xfffffffffffffff0,%rsp 11: 48 83 ec 50 sub $0x50,%rsp 15: 41 89 d3 mov %edx,%r11d 18: 49 89 f7 mov %rsi,%r15 1b: 48 8b 05 00 00 00 00 mov 0x0(%rip),%rax # 22 <synaptics_report_mt_data+0x22> 1e: R_X86_64_PC32 __stack_chk_guard-0x4 22: 48 89 44 24 40 mov %rax,0x40(%rsp) 27: 4c 8b 75 08 mov 0x8(%rbp),%r14 2b: 48 c7 c0 00 00 00 00 mov $0x0,%rax 2e: R_X86_64_32S _text+0x7f000000 32: 49 29 c6 sub %rax,%r14 35: 48 8b 1c 25 00 00 00 00 mov 0x0,%rbx 39: R_X86_64_32S current_task 3d: 8b 05 00 00 00 00 mov 0x0(%rip),%eax # 43 <synaptics_report_mt_data+0x43> 3f: R_X86_64_PC32 __preempt_count-0x4 43: 25 00 01 ff 00 and $0xff0100,%eax 48: 74 10 je 5a <synaptics_report_mt_data+0x5a> 4a: 3d 00 01 00 00 cmp $0x100,%eax 4f: 75 35 jne 86 <synaptics_report_mt_data+0x86> 51: 83 bb ac 14 00 00 00 cmpl $0x0,0x14ac(%rbx) 58: 74 2c je 86 <synaptics_report_mt_data+0x86> 5a: 8b 83 88 14 00 00 mov 0x1488(%rbx),%eax 60: 83 f8 02 cmp $0x2,%eax 63: 75 21 jne 86 <synaptics_report_mt_data+0x86> 65: 48 8b 83 90 14 00 00 mov 0x1490(%rbx),%rax 6c: 48 8b 08 mov (%rax),%rcx 6f: 48 8d 51 01 lea 0x1(%rcx),%rdx 73: 8b b3 8c 14 00 00 mov 0x148c(%rbx),%esi 79: 48 39 f2 cmp %rsi,%rdx 7c: 73 08 jae 86 <synaptics_report_mt_data+0x86> 7e: 48 89 10 mov %rdx,(%rax) 81: 4c 89 74 c8 08 mov %r14,0x8(%rax,%rcx,8) 86: 48 8b 07 mov (%rdi),%rax 89: 4c 8b 67 08 mov 0x8(%rdi),%r12 8d: 4c 89 7c 24 30 mov %r15,0x30(%rsp) 92: 48 8d 48 54 lea 0x54(%rax),%rcx 96: 48 89 4c 24 38 mov %rcx,0x38(%rsp) 9b: 48 b9 aa aa aa aa aa aa aa aa movabs $0xaaaaaaaaaaaaaaaa,%rcx a5: 48 89 4c 24 28 mov %rcx,0x28(%rsp) aa: 48 89 4c 24 20 mov %rcx,0x20(%rsp) af: 44 89 d9 mov %r11d,%ecx b2: 8b 15 00 00 00 00 mov 0x0(%rip),%edx # b8 <synaptics_report_mt_data+0xb8> b4: R_X86_64_PC32 __preempt_count-0x4 b8: 81 e2 00 01 ff 00 and $0xff0100,%edx be: 74 11 je d1 <synaptics_report_mt_data+0xd1> c0: 81 fa 00 01 00 00 cmp $0x100,%edx c6: 75 5b jne 123 <synaptics_report_mt_data+0x123> c8: 83 bb ac 14 00 00 00 cmpl $0x0,0x14ac(%rbx) cf: 74 52 je 123 <synaptics_report_mt_data+0x123> d1: 8b 93 88 14 00 00 mov 0x1488(%rbx),%edx d7: 83 fa 03 cmp $0x3,%edx da: 75 47 jne 123 <synaptics_report_mt_data+0x123> dc: 48 8b 93 90 14 00 00 mov 0x1490(%rbx),%rdx e3: 44 8b 83 8c 14 00 00 mov 0x148c(%rbx),%r8d ea: 49 c1 e0 03 shl $0x3,%r8 ee: 4c 8b 12 mov (%rdx),%r10 f1: 4c 89 d6 mov %r10,%rsi f4: 48 c1 e6 05 shl $0x5,%rsi f8: 4c 8d 4e 28 lea 0x28(%rsi),%r9 fc: 4d 39 c1 cmp %r8,%r9 ff: 77 22 ja 123 <synaptics_report_mt_data+0x123> 101: 49 ff c2 inc %r10 104: 4c 89 12 mov %r10,(%rdx) 107: 48 c7 44 32 08 05 00 00 00 movq $0x5,0x8(%rdx,%rsi,1) 110: 48 c7 44 32 10 01 00 00 00 movq $0x1,0x10(%rdx,%rsi,1) 119: 48 89 4c 32 18 mov %rcx,0x18(%rdx,%rsi,1) 11e: 4c 89 74 32 20 mov %r14,0x20(%rdx,%rsi,1) 123: 45 31 ed xor %r13d,%r13d 126: 41 83 fb 01 cmp $0x1,%r11d 12a: 41 0f 94 c5 sete %r13b 12e: 8b 15 00 00 00 00 mov 0x0(%rip),%edx # 134 <synaptics_report_mt_data+0x134> 130: R_X86_64_PC32 __preempt_count-0x4 134: 81 e2 00 01 ff 00 and $0xff0100,%edx 13a: 74 11 je 14d <synaptics_report_mt_data+0x14d> 13c: 81 fa 00 01 00 00 cmp $0x100,%edx 142: 75 5b jne 19f <synaptics_report_mt_data+0x19f> 144: 83 bb ac 14 00 00 00 cmpl $0x0,0x14ac(%rbx) 14b: 74 52 je 19f <synaptics_report_mt_data+0x19f> 14d: 8b 93 88 14 00 00 mov 0x1488(%rbx),%edx 153: 83 fa 03 cmp $0x3,%edx 156: 75 47 jne 19f <synaptics_report_mt_data+0x19f> 158: 48 8b 93 90 14 00 00 mov 0x1490(%rbx),%rdx 15f: 44 8b 83 8c 14 00 00 mov 0x148c(%rbx),%r8d 166: 49 c1 e0 03 shl $0x3,%r8 16a: 4c 8b 12 mov (%rdx),%r10 16d: 4c 89 d6 mov %r10,%rsi 170: 48 c1 e6 05 shl $0x5,%rsi 174: 4c 8d 4e 28 lea 0x28(%rsi),%r9 178: 4d 39 c1 cmp %r8,%r9 17b: 77 22 ja 19f <synaptics_report_mt_data+0x19f> 17d: 49 ff c2 inc %r10 180: 4c 89 12 mov %r10,(%rdx) 183: 48 c7 44 32 08 05 00 00 00 movq $0x5,0x8(%rdx,%rsi,1) 18c: 48 c7 44 32 10 01 00 00 00 movq $0x1,0x10(%rdx,%rsi,1) 195: 48 89 4c 32 18 mov %rcx,0x18(%rdx,%rsi,1) 19a: 4c 89 74 32 20 mov %r14,0x20(%rdx,%rsi,1) 19f: 41 83 fb 02 cmp $0x2,%r11d 1a3: b9 02 00 00 00 mov $0x2,%ecx 1a8: 44 0f 4d e9 cmovge %ecx,%r13d 1ac: 8b 0d 00 00 00 00 mov 0x0(%rip),%ecx # 1b2 <synaptics_report_mt_data+0x1b2> 1ae: R_X86_64_PC32 __preempt_count-0x4 1b2: 81 e1 00 01 ff 00 and $0xff0100,%ecx 1b8: 74 11 je 1cb <synaptics_report_mt_data+0x1cb> 1ba: 81 f9 00 01 00 00 cmp $0x100,%ecx 1c0: 75 5b jne 21d <synaptics_report_mt_data+0x21d> 1c2: 83 bb ac 14 00 00 00 cmpl $0x0,0x14ac(%rbx) 1c9: 74 52 je 21d <synaptics_report_mt_data+0x21d> 1cb: 8b 8b 88 14 00 00 mov 0x1488(%rbx),%ecx 1d1: 83 f9 03 cmp $0x3,%ecx 1d4: 75 47 jne 21d <synaptics_report_mt_data+0x21d> 1d6: 48 8b 8b 90 14 00 00 mov 0x1490(%rbx),%rcx 1dd: 44 8b 8b 8c 14 00 00 mov 0x148c(%rbx),%r9d 1e4: 49 c1 e1 03 shl $0x3,%r9 1e8: 48 8b 31 mov (%rcx),%rsi 1eb: 48 89 f2 mov %rsi,%rdx 1ee: 48 c1 e2 05 shl $0x5,%rdx 1f2: 4c 8d 42 28 lea 0x28(%rdx),%r8 1f6: 4d 39 c8 cmp %r9,%r8 1f9: 77 22 ja 21d <synaptics_report_mt_data+0x21d> 1fb: 48 ff c6 inc %rsi 1fe: 48 89 31 mov %rsi,(%rcx) 201: 48 c7 44 11 08 05 00 00 00 movq $0x5,0x8(%rcx,%rdx,1) 20a: 48 c7 44 11 10 00 00 00 00 movq $0x0,0x10(%rcx,%rdx,1) 213: 4c 89 6c 11 18 mov %r13,0x18(%rcx,%rdx,1) 218: 4c 89 74 11 20 mov %r14,0x20(%rcx,%rdx,1) 21d: 4d 85 ed test %r13,%r13 220: 48 89 7c 24 18 mov %rdi,0x18(%rsp) 225: 44 89 5c 24 0c mov %r11d,0xc(%rsp) 22a: 0f 84 85 00 00 00 je 2b5 <synaptics_report_mt_data+0x2b5> 230: 41 0f b7 0f movzwl (%r15),%ecx 234: 66 89 4c 24 28 mov %cx,0x28(%rsp) 239: 66 b9 e0 16 mov $0x16e0,%cx 23d: 66 ba e0 16 mov $0x16e0,%dx 241: 66 41 2b 57 04 sub 0x4(%r15),%dx 246: 66 89 54 24 2a mov %dx,0x2a(%rsp) 24b: 41 83 fb 01 cmp $0x1,%r11d 24f: 4c 89 7c 24 10 mov %r15,0x10(%rsp) 254: 0f 85 c8 00 00 00 jne 322 <synaptics_report_mt_data+0x322> 25a: 8b 0d 00 00 00 00 mov 0x0(%rip),%ecx # 260 <synaptics_report_mt_data+0x260> 25c: R_X86_64_PC32 __preempt_count-0x4 260: 81 e1 00 01 ff 00 and $0xff0100,%ecx 266: 74 19 je 281 <synaptics_report_mt_data+0x281> 268: 81 f9 00 01 00 00 cmp $0x100,%ecx 26e: 0f 85 15 01 00 00 jne 389 <synaptics_report_mt_data+0x389> 274: 83 bb ac 14 00 00 00 cmpl $0x0,0x14ac(%rbx) 27b: 0f 84 08 01 00 00 je 389 <synaptics_report_mt_data+0x389> 281: 8b 8b 88 14 00 00 mov 0x1488(%rbx),%ecx 287: 83 f9 02 cmp $0x2,%ecx 28a: 0f 85 f9 00 00 00 jne 389 <synaptics_report_mt_data+0x389> 290: 48 8b 8b 90 14 00 00 mov 0x1490(%rbx),%rcx 297: 48 8b 11 mov (%rcx),%rdx 29a: 48 8d 72 01 lea 0x1(%rdx),%rsi 29e: 8b bb 8c 14 00 00 mov 0x148c(%rbx),%edi 2a4: 48 39 fe cmp %rdi,%rsi 2a7: 0f 83 dc 00 00 00 jae 389 <synaptics_report_mt_data+0x389> 2ad: 48 89 31 mov %rsi,(%rcx) 2b0: e9 cf 00 00 00 jmp 384 <synaptics_report_mt_data+0x384> 2b5: 8b 0d 00 00 00 00 mov 0x0(%rip),%ecx # 2bb <synaptics_report_mt_data+0x2bb> 2b7: R_X86_64_PC32 __preempt_count-0x4 2bb: 81 e1 00 01 ff 00 and $0xff0100,%ecx 2c1: 74 11 je 2d4 <synaptics_report_mt_data+0x2d4> 2c3: 81 f9 00 01 00 00 cmp $0x100,%ecx 2c9: 75 35 jne 300 <synaptics_report_mt_data+0x300> 2cb: 83 bb ac 14 00 00 00 cmpl $0x0,0x14ac(%rbx) 2d2: 74 2c je 300 <synaptics_report_mt_data+0x300> 2d4: 8b 8b 88 14 00 00 mov 0x1488(%rbx),%ecx 2da: 83 f9 02 cmp $0x2,%ecx 2dd: 75 21 jne 300 <synaptics_report_mt_data+0x300> 2df: 48 8b 8b 90 14 00 00 mov 0x1490(%rbx),%rcx 2e6: 48 8b 11 mov (%rcx),%rdx 2e9: 48 8d 72 01 lea 0x1(%rdx),%rsi 2ed: 8b bb 8c 14 00 00 mov 0x148c(%rbx),%edi 2f3: 48 39 fe cmp %rdi,%rsi 2f6: 73 08 jae 300 <synaptics_report_mt_data+0x300> 2f8: 48 89 31 mov %rsi,(%rcx) 2fb: 4c 89 74 d1 08 mov %r14,0x8(%rcx,%rdx,8) 300: 8b 40 20 mov 0x20(%rax),%eax 303: 01 c0 add %eax,%eax 305: 44 8d 04 80 lea (%rax,%rax,4),%r8d 309: 48 8d 74 24 20 lea 0x20(%rsp),%rsi 30e: 48 8d 54 24 28 lea 0x28(%rsp),%rdx 313: 4c 89 e7 mov %r12,%rdi 316: 31 c9 xor %ecx,%ecx 318: e8 00 00 00 00 call 31d <synaptics_report_mt_data+0x31d> 319: R_X86_64_PLT32 input_mt_assign_slots-0x4 31d: e9 ae 01 00 00 jmp 4d0 <synaptics_report_mt_data+0x4d0> 322: 0f b7 50 54 movzwl 0x54(%rax),%edx 326: 66 89 54 24 2c mov %dx,0x2c(%rsp) 32b: 66 2b 48 58 sub 0x58(%rax),%cx 32f: 66 89 4c 24 2e mov %cx,0x2e(%rsp) 334: 8b 0d 00 00 00 00 mov 0x0(%rip),%ecx # 33a <synaptics_report_mt_data+0x33a> 336: R_X86_64_PC32 __preempt_count-0x4 33a: 41 83 fb 02 cmp $0x2,%r11d 33e: 0f 8c fd 01 00 00 jl 541 <synaptics_report_mt_data+0x541> 344: 81 e1 00 01 ff 00 and $0xff0100,%ecx 34a: 74 11 je 35d <synaptics_report_mt_data+0x35d> 34c: 81 f9 00 01 00 00 cmp $0x100,%ecx 352: 75 35 jne 389 <synaptics_report_mt_data+0x389> 354: 83 bb ac 14 00 00 00 cmpl $0x0,0x14ac(%rbx) 35b: 74 2c je 389 <synaptics_report_mt_data+0x389> 35d: 8b 8b 88 14 00 00 mov 0x1488(%rbx),%ecx 363: 83 f9 02 cmp $0x2,%ecx 366: 75 21 jne 389 <synaptics_report_mt_data+0x389> 368: 48 8b 8b 90 14 00 00 mov 0x1490(%rbx),%rcx 36f: 48 8b 11 mov (%rcx),%rdx 372: 48 8d 72 01 lea 0x1(%rdx),%rsi 376: 8b bb 8c 14 00 00 mov 0x148c(%rbx),%edi 37c: 48 39 fe cmp %rdi,%rsi 37f: 73 08 jae 389 <synaptics_report_mt_data+0x389> 381: 48 89 31 mov %rsi,(%rcx) 384: 4c 89 74 d1 08 mov %r14,0x8(%rcx,%rdx,8) 389: 8b 40 20 mov 0x20(%rax),%eax 38c: 01 c0 add %eax,%eax 38e: 44 8d 04 80 lea (%rax,%rax,4),%r8d 392: 48 8d 74 24 20 lea 0x20(%rsp),%rsi 397: 48 8d 54 24 28 lea 0x28(%rsp),%rdx 39c: 4c 89 e7 mov %r12,%rdi 39f: 44 89 e9 mov %r13d,%ecx 3a2: e8 00 00 00 00 call 3a7 <synaptics_report_mt_data+0x3a7> 3a3: R_X86_64_PLT32 input_mt_assign_slots-0x4 3a7: 49 ff cd dec %r13 3aa: 45 31 ff xor %r15d,%r15d 3ad: eb 04 jmp 3b3 <synaptics_report_mt_data+0x3b3> 3af: 90 nop 3b0: 49 ff c7 inc %r15 3b3: 42 8b 4c bc 20 mov 0x20(%rsp,%r15,4),%ecx 3b8: 4c 89 e7 mov %r12,%rdi 3bb: be 03 00 00 00 mov $0x3,%esi 3c0: ba 2f 00 00 00 mov $0x2f,%edx 3c5: e8 00 00 00 00 call 3ca <synaptics_report_mt_data+0x3ca> 3c6: R_X86_64_PLT32 input_event-0x4 3ca: 4c 89 e7 mov %r12,%rdi 3cd: 31 f6 xor %esi,%esi 3cf: ba 01 00 00 00 mov $0x1,%edx 3d4: e8 00 00 00 00 call 3d9 <synaptics_report_mt_data+0x3d9> 3d5: R_X86_64_PLT32 input_mt_report_slot_state-0x4 3d9: 42 0f bf 4c bc 28 movswl 0x28(%rsp,%r15,4),%ecx 3df: 4c 89 e7 mov %r12,%rdi 3e2: be 03 00 00 00 mov $0x3,%esi 3e7: ba 35 00 00 00 mov $0x35,%edx 3ec: e8 00 00 00 00 call 3f1 <synaptics_report_mt_data+0x3f1> 3ed: R_X86_64_PLT32 input_event-0x4 3f1: 42 0f bf 4c bc 2a movswl 0x2a(%rsp,%r15,4),%ecx 3f7: 4c 89 e7 mov %r12,%rdi 3fa: be 03 00 00 00 mov $0x3,%esi 3ff: ba 36 00 00 00 mov $0x36,%edx 404: e8 00 00 00 00 call 409 <synaptics_report_mt_data+0x409> 405: R_X86_64_PLT32 input_event-0x4 409: 4a 8b 44 fc 30 mov 0x30(%rsp,%r15,8),%rax 40e: 8b 48 08 mov 0x8(%rax),%ecx 411: 4c 89 e7 mov %r12,%rdi 414: be 03 00 00 00 mov $0x3,%esi 419: ba 3a 00 00 00 mov $0x3a,%edx 41e: e8 00 00 00 00 call 423 <synaptics_report_mt_data+0x423> 41f: R_X86_64_PLT32 input_event-0x4 423: 8b 05 00 00 00 00 mov 0x0(%rip),%eax # 429 <synaptics_report_mt_data+0x429> 425: R_X86_64_PC32 __preempt_count-0x4 429: 25 00 01 ff 00 and $0xff0100,%eax 42e: 4d 39 fd cmp %r15,%r13 431: 74 58 je 48b <synaptics_report_mt_data+0x48b> 433: 85 c0 test %eax,%eax 435: 74 18 je 44f <synaptics_report_mt_data+0x44f> 437: 3d 00 01 00 00 cmp $0x100,%eax 43c: 0f 85 6e ff ff ff jne 3b0 <synaptics_report_mt_data+0x3b0> 442: 83 bb ac 14 00 00 00 cmpl $0x0,0x14ac(%rbx) 449: 0f 84 61 ff ff ff je 3b0 <synaptics_report_mt_data+0x3b0> 44f: 8b 83 88 14 00 00 mov 0x1488(%rbx),%eax 455: 83 f8 02 cmp $0x2,%eax 458: 0f 85 52 ff ff ff jne 3b0 <synaptics_report_mt_data+0x3b0> 45e: 48 8b 83 90 14 00 00 mov 0x1490(%rbx),%rax 465: 48 8b 08 mov (%rax),%rcx 468: 48 8d 51 01 lea 0x1(%rcx),%rdx 46c: 8b b3 8c 14 00 00 mov 0x148c(%rbx),%esi 472: 48 39 f2 cmp %rsi,%rdx 475: 0f 83 35 ff ff ff jae 3b0 <synaptics_report_mt_data+0x3b0> 47b: 48 89 10 mov %rdx,(%rax) 47e: 4c 89 74 c8 08 mov %r14,0x8(%rax,%rcx,8) 483: 49 ff c7 inc %r15 486: e9 28 ff ff ff jmp 3b3 <synaptics_report_mt_data+0x3b3> 48b: 85 c0 test %eax,%eax 48d: 4c 8b 7c 24 10 mov 0x10(%rsp),%r15 492: 74 10 je 4a4 <synaptics_report_mt_data+0x4a4> 494: 3d 00 01 00 00 cmp $0x100,%eax 499: 75 35 jne 4d0 <synaptics_report_mt_data+0x4d0> 49b: 83 bb ac 14 00 00 00 cmpl $0x0,0x14ac(%rbx) 4a2: 74 2c je 4d0 <synaptics_report_mt_data+0x4d0> 4a4: 8b 83 88 14 00 00 mov 0x1488(%rbx),%eax 4aa: 83 f8 02 cmp $0x2,%eax 4ad: 75 21 jne 4d0 <synaptics_report_mt_data+0x4d0> 4af: 48 8b 83 90 14 00 00 mov 0x1490(%rbx),%rax 4b6: 48 8b 08 mov (%rax),%rcx 4b9: 48 8d 51 01 lea 0x1(%rcx),%rdx 4bd: 8b b3 8c 14 00 00 mov 0x148c(%rbx),%esi 4c3: 48 39 f2 cmp %rsi,%rdx 4c6: 73 08 jae 4d0 <synaptics_report_mt_data+0x4d0> 4c8: 48 89 10 mov %rdx,(%rax) 4cb: 4c 89 74 c8 08 mov %r14,0x8(%rax,%rcx,8) 4d0: 4c 89 e7 mov %r12,%rdi 4d3: e8 00 00 00 00 call 4d8 <synaptics_report_mt_data+0x4d8> 4d4: R_X86_64_PLT32 input_mt_drop_unused-0x4 4d8: 4c 89 e7 mov %r12,%rdi 4db: 31 f6 xor %esi,%esi 4dd: e8 00 00 00 00 call 4e2 <synaptics_report_mt_data+0x4e2> 4de: R_X86_64_PLT32 input_mt_report_pointer_emulation-0x4 4e2: 4c 89 e7 mov %r12,%rdi 4e5: 8b 74 24 0c mov 0xc(%rsp),%esi 4e9: e8 00 00 00 00 call 4ee <synaptics_report_mt_data+0x4ee> 4ea: R_X86_64_PLT32 input_mt_report_finger_count-0x4 4ee: 48 8b 7c 24 18 mov 0x18(%rsp),%rdi 4f3: 4c 89 fe mov %r15,%rsi 4f6: e8 00 00 00 00 call 4fb <synaptics_report_mt_data+0x4fb> 4f7: R_X86_64_PLT32 .text.synaptics_report_buttons-0x4 4fb: 4c 89 e7 mov %r12,%rdi 4fe: 31 f6 xor %esi,%esi 500: 31 d2 xor %edx,%edx 502: 31 c9 xor %ecx,%ecx 504: e8 00 00 00 00 call 509 <synaptics_report_mt_data+0x509> 505: R_X86_64_PLT32 input_event-0x4 509: 48 8b 05 00 00 00 00 mov 0x0(%rip),%rax # 510 <synaptics_report_mt_data+0x510> 50c: R_X86_64_PC32 __stack_chk_guard-0x4 510: 48 3b 44 24 40 cmp 0x40(%rsp),%rax 515: 75 25 jne 53c <synaptics_report_mt_data+0x53c> 517: 48 8d 65 d8 lea -0x28(%rbp),%rsp 51b: 5b pop %rbx 51c: 41 5c pop %r12 51e: 41 5d pop %r13 520: 41 5e pop %r14 522: 41 5f pop %r15 524: 5d pop %rbp 525: 31 c0 xor %eax,%eax 527: 31 c9 xor %ecx,%ecx 529: 31 ff xor %edi,%edi 52b: 31 d2 xor %edx,%edx 52d: 31 f6 xor %esi,%esi 52f: 45 31 c0 xor %r8d,%r8d 532: 45 31 c9 xor %r9d,%r9d 535: 45 31 d2 xor %r10d,%r10d 538: 45 31 db xor %r11d,%r11d 53b: c3 ret 53c: e8 00 00 00 00 call 541 <synaptics_report_mt_data+0x541> 53d: R_X86_64_PLT32 __stack_chk_fail-0x4 541: 8b 83 88 14 00 00 mov 0x1488(%rbx),%eax 547: 48 8b 83 90 14 00 00 mov 0x1490(%rbx),%rax 54e: 48 ff 00 incq (%rax) > Also, if you happen to have CONFIG_DEBUG_INFO enabled, the line number > of that last branch: > > addr2line -fpie vmlinux.o.orig -j .text.synaptics_report_mt_data 0x33e That configuration does have debug info enabled but... $ addr2line -fpie vmlinux.o.orig -j .text.synaptics_report_mt_data 0x33e synaptics_report_mt_data at ld-temp.o:? Unfortunately, I am not sure how well LTO preserves debug info; IIUC, debug info in LLVM is best effort, optimizations may or may not update the info throughout their transformations, especially by the time the LTO pipeline happens. Cheers, Nathan
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