<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/100283>100283</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            "value is too large for field of 1 byte" after commit 1a47f3f3db665
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            mc
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          nathanchance
      </td>
    </tr>
</table>

<pre>
    After 1a47f3f3db66589c11f8ddacfeaecc03fb80c510 (which does not appear to have a corresponding PR), I see an error when building certain Linux kernels:

```
error: <instantiation>:9:2: error: value of -130 is too large for field of 1 byte.
 jmp 801b
 ^
make[5]: *** [/builds/linux/scripts/Makefile.build:361: arch/x86/kvm/svm/vmenter.o] Error 1
```

https://elixir.bootlin.com/linux/v6.6.41/source/arch/x86/kvm/svm/vmenter.S#L60

I used `cvise --not-c` to produce

```asm
.macro ALTERNATIVE_2 oldinstr newinstr1  
 .skip (144f-143f) ^ (144f-143f < 145-144) 
 .pushsection ""
143:
 \newinstr1
144:
 .popsection
.endm
.macro FILL_RETURN_BUFFER reg  
 ALTERNATIVE_2 , "mov $0, \reg; 771: 999: .pushsection .discard.intra_function_calls; .long 999b; .popsection;; call 772f; int3; 72: 99: .pushsection .discard.intra_function_calls; .long 99b; .popsection;; call 772f; int3; 772: add $0 * 2, %rsp; dec \reg; jnz 771b; lfence; movq $-1, %gs:pcpu_hot + 6;" 
.endm
.macro CALL_UNTRAIN_RET
 ALTERNATIVE_2 , "call entry_untrain_ret" 
.endm
.macro __UNTRAIN_RET ibpb_feature call_depth_insns
 CALL_UNTRAIN_RET
 ALTERNATIVE_2 , "\call_depth_insns" 
.endm
.macro RESTORE_GUEST_SPEC_CTRL
801:
.endm
.macro RESTORE_GUEST_SPEC_CTRL_BODY
 movl 936(%rdi), %eax
 cmp %gs:x86_spec_ctrl_current, %eax
 je 801b
 mov edx, %edx
 wrmsr
 jmp 801b
.endm
.macro RESTORE_HOST_SPEC_CTRL
 ALTERNATIVE_2 , "jmp 900f" 
901:
.endm
.macro RESTORE_HOST_SPEC_CTRL_BODY
900:
 mov $0x00000048, %ecx
 jmp 901b
.endm
 RESTORE_GUEST_SPEC_CTRL
2: cli
 pop %rdi
 FILL_RETURN_BUFFER %rax 
 RESTORE_HOST_SPEC_CTRL
 __UNTRAIN_RET , "xor %eax, %eax; bts $63, %rax; movq %rax, %gs:pcpu_hot + 6;"
 pop %r12
 pop rbp
 jmp __x86_return_thunk
 RESTORE_GUEST_SPEC_CTRL_BODY
 RESTORE_HOST_SPEC_CTRL_BODY
cmpb $0, kvm_rebooting
 jne 2b

```

as a reproducer that has no error with GNU as or `clang` at the parent of 1a47f3f3db66589c11f8ddacfeaecc03fb80c510:

```
$ x86_64-linux-as --version | head -1
GNU assembler (GNU Binutils) 2.42

$ x86_64-linux-gcc -c -o /dev/null vmenter.s

$ clang --version | head -1
ClangBuiltLinux clang version 19.0.0git (https://github.com/llvm/llvm-project.git 0387cd052b081d6bc9856ef756942a5df1a2a301)

$ clang --target=x86_64-linux-gnu -c -o /dev/null vmenter.s
```

```
$ clang --version | head -1
ClangBuiltLinux clang version 19.0.0git (https://github.com/llvm/llvm-project.git 1a47f3f3db66589c11f8ddacfeaecc03fb80c510)

$ clang --target=x86_64-linux-gnu -c -o /dev/null vmenter.s
vmenter.s:51:2: error: value of -130 is too large for field of 1 byte.
 jne 2b
 ^
```

cc @MaskRay
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzEV29vozwS_zTOm1EQ2EDgRV4kafLcSn26j7LtSfcKGTMEb8Fwtslm79Of7CRt0s12u6c7XUUJtufvb2bsMTdG7hTinCRLktxN-GibXs8Vtw1Xwv3jpOyr7_NFbVFDxONZzWpWlWmaZLmIojqrKi5q5ChEyOoyC0UShUBo9q2RooGqRwOqt8CHAbkG20PD9wgcRK81mqFXlVQ7-GtLaE7oCj6BQQSuALXuNXxrUEE5ytZTCdSWSwX3Uo0HeEatsDWELUh4R8LzOw1Pjx96MYQtgLCVVMZyZSW3sleErQlb5IQtqFt-odvzdkToa5hGLARpwPY9tFzvEOpeQy2xrdxyBOV3i8FRC3ztBsjCqDwNSbI-fnX8GUmyTEhy542gi-MDDnC68Z4ZQjet84jQjRFaDtbN_MmfsZYtBp6GsAVLIyeCa9EQujlkKaGb533nmPx736GyqIOeJHew9uhFNyE5vhtrB48d3RC6wVYepA7KvretVIHouwuj9mmQBnHkNPWjFkjo5pdWfCGU3V9r_ASjwQpIGoq9NAjTqertVJA0dGkx6L4aBd4MJTfdcSbouNA9LO4f19uHxeOnv68LCr1LDmM1KPzmPyKAUxwC8ywHl41RHNfTKGY1obmLztWcyw2I4mQaxbFfPzEPo2kMCpctQCh1j1-JYvaSdECS1Yve83L8uhwM_XCScXIBVXXtzebT_X2xXT8-bR-K5dNms96Cxt2LD9fOuhohlHb9HgiNQz9MVhp3hC1hNvMpkucura_tDyppBNdVIJXVvKhH5ecLwVtXQksI2l7tHGvpRxdms6WbcYQwm9HaDaSyzCukR33_ubrf0nZUx6vK--6qCegRkESbwZFUKC7w-Kr-5TDxOtoalUD31fX7fzoB0-jEu3N1MIhhLJreAqFLSJ0ZlMLPQrZa3N8XTw-P28WnBxe690LlXUFl9fdidGBIVWi070kvLkWDLIeyqJHbUaPHpahwsE0hlVHmpPh37CHJ6gcp7xizXX95_LxdF388rb88Fl_-Wq-K1eP2_kiThdFLqn-YtVh-vvvHycKu37eQs5TQzAWxkqdjgNAE-eFEJLrhJUyHLC3MgKIQVreFGLVGZX_g-IqXu7ErFqwOZ6rqTPVNd0bf3MB_7svfPv-Iwm2cncQ8DOtXcPMPoXWt4QKsPAxf95XzBnAI_V-cnb0ThwuP8lsevR9SX2KilSfaoffYu8gcJ27sVm6dH-CN9JtIXaf2CalDr8_hew0kW0JpjfMxZecaP06f6tcPf1HAb5yILid0OVwgVRQuszTaUavCNqN6fh-syyT-ZeREN5Qv2_Xzvis0upNWqt3ZAoVAy3famOObG-Cg8XRUarANt9Bw12Gd-yVpG_jj4Qm4AYdqGoqWq507Y7kF2yAM3FWM72A-2M2932ARGoODLo2nvl-YcgPT6R618cfmbAUN8gqmp8PxaJvBrmzRRT1zE0upRitb4w5fGsT0St1b-TshYCpg2gOhmwr3hG7U2LZw7jzMW26PwHs2rRzBcpStPTaWR4YzeZQHYRDupEus7Lpr2knbjOW5W2r355_poPuvKGzguEKWzUQVJrQMs6hKS5FnSYr1LEnzmPKkqiNOOQsjt_P9xHLr2k9L2N01EGr8EBC3MulGEP_PMH04G_9HML0O2SKJ_lvXgou6fr0U3IyIEEDi8E9unrf8-6SasypnOZ_gPJrRaDbLchpPmnlEq5ngOKuqJIlYHqVZgmmaz6KaVyxBNpFzGtI4nFFGWZLQOOBxGtVlTWlNy7hmjMQhdly2gYtA0OvdRBoz4jwKQ5qxSctLbI2_D1LaCd8v3E303MerHHeGxGErjTWv_FbaFueE0iNGv8LGnYfcXydF33VvIz8ZdTv_vfQhdONdcLemkxf7Of13AAAA__9Ut1HB">