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* [Bug target/99870] New: uiret generated for -mcmodel=kernel
@ 2021-04-01 16:28 hjl.tools at gmail dot com
  0 siblings, 0 replies; only message in thread
From: hjl.tools at gmail dot com @ 2021-04-01 16:28 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99870

            Bug ID: 99870
           Summary: uiret generated for -mcmodel=kernel
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
  Target Milestone: ---
            Target: x86-64

[hjl@gnu-cfl-2 tmp]$ /usr/gcc-11.0.1-x32/bin/gcc -march=sapphirerapids
-mcmodel=kernel -mno-sse -mno-mmx  -O2 -S -mno-80387 x.c 
[hjl@gnu-cfl-2 tmp]$ cat x.s
        .file   "x.c"
        .text
        .p2align 4
        .globl  foo
        .type   foo, @function
foo:
.LFB0:
        .cfi_startproc
        uiret
        .cfi_endproc
.LFE0:
        .size   foo, .-foo
        .ident  "GCC: (GNU) 11.0.1 20210330 (experimental)"
        .section        .note.GNU-stack,"",@progbits
[hjl@gnu-cfl-2 tmp]$ cat x.c
__attribute__((interrupt))
void
foo (void *frame)
{
}
[hjl@gnu-cfl-2 tmp]$ /usr/gcc-11.0.1-x32/bin/gcc -march=sapphirerapids
-mcmodel=kernel -mno-sse -mno-mmx  -O2 -S -mno-80387 x.c 
[hjl@gnu-cfl-2 tmp]$ cat x.s
        .file   "x.c"
        .text
        .p2align 4
        .globl  foo
        .type   foo, @function
foo:
.LFB0:
        .cfi_startproc
        uiret  <<<<<<  This should be iret.
        .cfi_endproc
.LFE0:
        .size   foo, .-foo
        .ident  "GCC: (GNU) 11.0.1 20210330 (experimental)"
        .section        .note.GNU-stack,"",@progbits
[hjl@gnu-cfl-2 tmp]$

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