<div dir="ltr">Hi Derrick,<div><br></div><div>Can you send through `test.c`? What does clang's assembly say (`path/to/compiled/clang --target=aarch64-linux-gnu -march=armv8.5-a -fsanitize=hwaddress -S test.c; cat test.s`)?</div><div><br></div><div>- Mitch</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Jun 22, 2020 at 12:04 PM Derrick McKee via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org">llvm-dev@lists.llvm.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi,<br>
<br>
I am trying to execute a simple hello world program compiled like so:<br>
<br>
path/to/compiled/clang -o test --target=aarch64-linux-gnu<br>
-march=armv8.5-a -fsanitize=hwaddress<br>
--sysroot=/usr/aarch64-linux-gnu/<br>
-L/usr/lib/gcc/aarch64-linux-gnu/10.1.0/ -g test.c<br>
<br>
However, when I look at the disassembly, there is an unknown<br>
instruction listed at 0x2d51c:<br>
<br>
000000000002d4c0 main:<br>
2d4c0: ff c3 00 d1 sub sp, sp, #48<br>
2d4c4: fd 7b 02 a9 stp x29, x30, [sp, #32]<br>
2d4c8: fd 83 00 91 add x29, sp, #32<br>
2d4cc: 08 01 00 d0 adrp x8, #139264<br>
2d4d0: 08 49 47 f9 ldr x8, [x8, #3728]<br>
2d4d4: 49 d0 3b d5 mrs x9, TPIDR_EL0<br>
2d4d8: 28 69 68 f8 ldr x8, [x9, x8]<br>
2d4dc: 08 7d 40 b2 orr x8, x8, #0xffffffff<br>
2d4e0: 08 05 00 91 add x8, x8, #1<br>
2d4e4: a2 13 00 d1 sub x2, x29, #4<br>
2d4e8: e9 03 08 aa mov x9, x8<br>
2d4ec: df 64 ff 97 bl #-158852<br>
<__hwasan_check_x2_18_short><br>
2d4f0: ea 03 1f 2a mov w10, wzr<br>
2d4f4: aa c3 1f b8 stur w10, [x29, #-4]<br>
2d4f8: a2 23 00 d1 sub x2, x29, #8<br>
2d4fc: e9 03 08 aa mov x9, x8<br>
2d500: da 64 ff 97 bl #-158872<br>
<__hwasan_check_x2_18_short><br>
2d504: a0 83 1f b8 stur w0, [x29, #-8]<br>
2d508: e2 43 00 91 add x2, sp, #16<br>
2d50c: e9 03 08 aa mov x9, x8<br>
2d510: ec 64 ff 97 bl #-158800<br>
<__hwasan_check_x2_19_short><br>
2d514: e1 0b 00 f9 str x1, [sp, #16]<br>
2d518: 40 00 00 d0 adrp x0, #40960<br>
2d51c: e0 ff e5 b2 <unknown><br>
2d520: 00 40 35 91 add x0, x0, #3408<br>
2d524: ea 0f 00 b9 str w10, [sp, #12]<br>
2d528: c2 64 ff 97 bl #-158968 <printf@plt><br>
2d52c: ea 0f 40 b9 ldr w10, [sp, #12]<br>
2d530: e0 0b 00 b9 str w0, [sp, #8]<br>
2d534: e0 03 0a 2a mov w0, w10<br>
2d538: fd 7b 42 a9 ldp x29, x30, [sp, #32]<br>
2d53c: ff c3 00 91 add sp, sp, #48<br>
2d540: c0 03 5f d6 ret<br>
<br>
<br>
Am I compiling the program incorrectly? For reference, here's my clang version<br>
<br>
# llvm-project/build-10.x/install/bin/clang --version<br>
[1]<br>
clang version 10.0.1 (git@github.com:llvm/llvm-project.git<br>
a634a80615b1e012f1a61aa0cd1e2e67ef77d0bd)<br>
Target: x86_64-unknown-linux-gnu<br>
Thread model: posix<br>
<br>
-- <br>
Derrick McKee<br>
Phone: <a href="tel:(703)%20957-9362" value="+17039579362" target="_blank">(703) 957-9362</a><br>
Email: <a href="mailto:derrick.mckee@gmail.com" target="_blank">derrick.mckee@gmail.com</a><br>
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</blockquote></div>