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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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6846351052
Introduce new flags that defines which ABI to use on creating sigframe. Those flags kernel will set according to sigaction syscall ABI, which set handler for the signal being delivered. So that will drop the dependency on TIF_IA32/TIF_X32 flags on signal deliver. Those flags will be used only under CONFIG_COMPAT. Similar way ARM uses sa_flags to differ in which mode deliver signal for 26-bit applications (look at SA_THIRYTWO). Signed-off-by: Dmitry Safonov <dsafonov@virtuozzo.com> Reviewed-by: Andy Lutomirski <luto@kernel.org> Cc: 0x7f454c46@gmail.com Cc: oleg@redhat.com Cc: linux-mm@kvack.org Cc: gorcunov@openvz.org Cc: xemul@virtuozzo.com Link: http://lkml.kernel.org/r/20160905133308.28234-7-dsafonov@virtuozzo.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
40 lines
1.1 KiB
C
40 lines
1.1 KiB
C
/*
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* x86 FPU signal frame handling methods:
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*/
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#ifndef _ASM_X86_FPU_SIGNAL_H
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#define _ASM_X86_FPU_SIGNAL_H
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#ifdef CONFIG_X86_64
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# include <uapi/asm/sigcontext.h>
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# include <asm/user32.h>
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struct ksignal;
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int ia32_setup_rt_frame(int sig, struct ksignal *ksig,
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compat_sigset_t *set, struct pt_regs *regs);
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int ia32_setup_frame(int sig, struct ksignal *ksig,
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compat_sigset_t *set, struct pt_regs *regs);
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#else
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# define user_i387_ia32_struct user_i387_struct
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# define user32_fxsr_struct user_fxsr_struct
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# define ia32_setup_frame __setup_frame
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# define ia32_setup_rt_frame __setup_rt_frame
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#endif
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#ifdef CONFIG_COMPAT
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int __copy_siginfo_to_user32(compat_siginfo_t __user *to,
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const siginfo_t *from, bool x32_ABI);
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#endif
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extern void convert_from_fxsr(struct user_i387_ia32_struct *env,
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struct task_struct *tsk);
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extern void convert_to_fxsr(struct task_struct *tsk,
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const struct user_i387_ia32_struct *env);
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unsigned long
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fpu__alloc_mathframe(unsigned long sp, int ia32_frame,
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unsigned long *buf_fx, unsigned long *size);
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extern void fpu__init_prepare_fx_sw_frame(void);
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#endif /* _ASM_X86_FPU_SIGNAL_H */
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