I'm testing on FreeBSD. I know little to nothing about the operating system. I have a couple of source files that use x86 SHA intrinsics. See https://github.com/noloader/ldns/blob/develop-sha/sha1.c and https://github.com/noloader/ldns/blob/develop-sha/sha256.c. Attempting to verify the code generation results in the following. It is mostly garbage. $ objdump -d sha1.o ... 0000000000001170 <ldns_sha1_transform_x86>: 1170: 66 0f 6f 25 00 00 00 movdqa 0x0(%rip),%xmm4 # 1178 <ldns_sha1_transform_x86+0x8> 1177: 00 1178: f3 0f 6f 06 movdqu (%rsi),%xmm0 117c: 66 0f ef db pxor %xmm3,%xmm3 1180: f3 0f 6f 17 movdqu (%rdi),%xmm2 1184: 66 0f 3a 22 5f 10 03 pinsrd $0x3,0x10(%rdi),%xmm3 118b: f3 0f 6f 7e 10 movdqu 0x10(%rsi),%xmm7 1190: 66 0f 38 00 c4 pshufb %xmm4,%xmm0 1195: f3 44 0f 6f 4e 20 movdqu 0x20(%rsi),%xmm9 119b: 66 0f 70 d2 1b pshufd $0x1b,%xmm2,%xmm2 11a0: 66 0f 6f cb movdqa %xmm3,%xmm1 11a4: f3 44 0f 6f 46 30 movdqu 0x30(%rsi),%xmm8 11aa: 66 0f fe c8 paddd %xmm0,%xmm1 11ae: 66 0f 6f f2 movdqa %xmm2,%xmm6 11b2: 66 0f 38 00 fc pshufb %xmm4,%xmm7 11b7: 0f 3a cc (bad) 11ba: f1 icebp 11bb: 00 66 0f add %ah,0xf(%rsi) 11be: 6f outsl %ds:(%rsi),(%dx) 11bf: ea (bad) 11c0: 66 0f 6f cf movdqa %xmm7,%xmm1 11c4: 0f 38 c8 (bad) 11c7: ef out %eax,(%dx) 11c8: 66 0f 6f fe movdqa %xmm6,%xmm7 11cc: 66 44 0f 38 00 cc pshufb %xmm4,%xmm9 11d2: 0f 3a cc (bad) 11d5: fd std 11d6: 00 41 0f add %al,0xf(%rcx) 11d9: 38 c8 cmp %cl,%al 11db: f1 icebp ...
Can you try with llvm-objdump? Otherwise, please install the binutils port or package.
objdump 2.17.50 has now been removed for FreeBSD 13