| /* |
| * hostdep.h : things which are dependent on the host architecture |
| * |
| * * Written by Peter Maydell <peter.maydell@linaro.org> |
| * |
| * Copyright (C) 2016 Linaro Limited |
| * |
| * This work is licensed under the terms of the GNU GPL, version 2 or later. |
| * See the COPYING file in the top-level directory. |
| */ |
| |
| #ifndef X86_64_HOSTDEP_H |
| #define X86_64_HOSTDEP_H |
| |
| /* We have a safe-syscall.inc.S */ |
| #define HAVE_SAFE_SYSCALL |
| |
| #ifndef __ASSEMBLER__ |
| |
| /* These are defined by the safe-syscall.inc.S file */ |
| extern char safe_syscall_start[]; |
| extern char safe_syscall_end[]; |
| |
| /* Adjust the signal context to rewind out of safe-syscall if we're in it */ |
| static inline void rewind_if_in_safe_syscall(void *puc) |
| { |
| ucontext_t *uc = puc; |
| greg_t *pcreg = &uc->uc_mcontext.gregs[REG_RIP]; |
| |
| if (*pcreg > (uintptr_t)safe_syscall_start |
| && *pcreg < (uintptr_t)safe_syscall_end) { |
| *pcreg = (uintptr_t)safe_syscall_start; |
| } |
| } |
| |
| #endif /* __ASSEMBLER__ */ |
| |
| #endif |
