diff options
Diffstat (limited to 'linux-user/host/riscv/hostdep.h')
| -rw-r--r-- | linux-user/host/riscv/hostdep.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/linux-user/host/riscv/hostdep.h b/linux-user/host/riscv/hostdep.h new file mode 100644 index 0000000000..2ba07456ae --- /dev/null +++ b/linux-user/host/riscv/hostdep.h @@ -0,0 +1,34 @@ +/* + * hostdep.h : things which are dependent on the host architecture + * + * 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 RISCV_HOSTDEP_H +#define RISCV_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; + unsigned long *pcreg = &uc->uc_mcontext.__gregs[REG_PC]; + + if (*pcreg > (uintptr_t)safe_syscall_start + && *pcreg < (uintptr_t)safe_syscall_end) { + *pcreg = (uintptr_t)safe_syscall_start; + } +} + +#endif /* __ASSEMBLER__ */ + +#endif |