> 2023年4月4日 06:21，Daniil Kovalev <dkova...@compiler-toolchain-for.me> 写道：
>
> If a program requires fr1, we should set the FR bit of CP0 control status
> register and add F64 hardware flag. The corresponding `else if` branch
> statement is copied from the linux kernel sources (see `arch_check_elf`
> function
> in linux/arch/mips/kernel/elf.c).
>
> Signed-off-by: Daniil Kovalev <dkova...@compiler-toolchain-for.me>
Reviewed-by: Jiaxun Yang <jiaxun.y...@flygoat.com>
Thanks!
> ---
> linux-user/mips/cpu_loop.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/linux-user/mips/cpu_loop.c b/linux-user/mips/cpu_loop.c
> index d5c1c7941d..8735e58bad 100644
> --- a/linux-user/mips/cpu_loop.c
> +++ b/linux-user/mips/cpu_loop.c
> @@ -290,7 +290,10 @@ void target_cpu_copy_regs(CPUArchState *env, struct
> target_pt_regs *regs)
> env->CP0_Status |= (1 << CP0St_FR);
> env->hflags |= MIPS_HFLAG_F64;
> }
> - } else if (!prog_req.fre && !prog_req.frdefault &&
> + } else if (prog_req.fr1) {
> + env->CP0_Status |= (1 << CP0St_FR);
> + env->hflags |= MIPS_HFLAG_F64;
> + } else if (!prog_req.fre && !prog_req.frdefault &&
> !prog_req.fr1 && !prog_req.single && !prog_req.soft) {
> fprintf(stderr, "qemu: Can't find a matching FPU mode\n");
> exit(1);
> --
> 2.40.0
>
