git: 2947a48bea3b - stable/15 - amd64: try to fix the build with old clang that does not know about FRED
Konstantin Belousov <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.cvs.src,gmane.os.freebsd.devel.stable.scm |
|---|---|
| Message-ID | <[email protected]> |
The branch stable/15 has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=2947a48bea3b720e58f3a2e1d6740789e9cc259a commit 2947a48bea3b720e58f3a2e1d6740789e9cc259a Author: Konstantin Belousov <[email protected]> AuthorDate: 2026-07-30 09:45:51 +0000 Commit: Konstantin Belousov <[email protected]> CommitDate: 2026-08-07 10:27:34 +0000 amd64: try to fix the build with old clang that does not know about FRED (cherry picked from commit 72952bf6a307391e127d3ab4a6f073664ce62d89) --- sys/amd64/amd64/exception.S | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/sys/amd64/amd64/exception.S b/sys/amd64/amd64/exception.S index 8eb5c185974d..0e783fe4ff00 100644 --- a/sys/amd64/amd64/exception.S +++ b/sys/amd64/amd64/exception.S @@ -1403,6 +1403,23 @@ gsbase_load_fault: movq $0,PCB_GSBASE(%r8) jmp doreti +#if defined(__clang__) && (__clang_major__ <= 18) + .macro lkgs reg + .if \reg != %ax + .err "Only %ax is supported" + .endif + .byte 0xf2, 0x0f, 0x00, 0xf0 + .endm + + .macro eretu + .byte 0xf3, 0x0f, 0x01, 0xca + .endm + + .macro erets + .byte 0xf2, 0x0f, 0x01, 0xca + .endm +#endif + /* * FRED guarantees that on entry, %rflags is set to '2', which in * particular means that interrupts are disabled, and DF/AC are clear.