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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/113312] Update __attribute__((interrupt)) for Intel FRED
Date: Thu, 11 Jan 2024 02:19:25 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113312

--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to H. Peter Anvin from comment #3)
> Created attachment 57032 [details]
> FRED assembly entry stub (example, slightly modified from the Linux kerne=
l)

Can you do

asm_fred_entry_\type:
        endbr64
        push    %rdi
        push    %rsi
        push    %rdx
        push    %rax
        push    %r8
        push    %r9
        push    %r10
        push    %r11
        push    %rbx
        push    %rbp
        push    %r12
        push    %r13
        push    %r14
        push    %r15
        lea     15*8(%rsp),%rdi <<<<<< RDI will point to the event info aft=
er
CALL.
        call    fred_entry_\type        /* call C code */
        endbr64
        pop     %r15
        pop     %r14
        pop     %r13
        pop     %r12
        pop     %rbp
        pop     %rbx
        pop     %r11
        pop     %r10
        pop     %r9
        pop     %r8
        pop     %rax
        pop     %rdx
        pop     %rsi
        pop     %rdi
        \eret=