| Message ID | 20220109161923.85683-13-imp@bsdimp.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | bsd-user: upstream our signal implementation | expand |
On Sun, 9 Jan 2022 at 16:29, Warner Losh <imp@bsdimp.com> wrote: > > Implement host_signal_pc, host_signal_set_pc and host_signal_write for > i386. > > Signed-off-by: Kyle Evans <kevans@freebsd.org> > Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> thanks -- PMM
On 1/10/22 3:19 AM, Warner Losh wrote: > Implement host_signal_pc, host_signal_set_pc and host_signal_write for > i386. > > Signed-off-by: Kyle Evans<kevans@freebsd.org> > Signed-off-by: Warner Losh<imp@bsdimp.com> > --- > bsd-user/host/i386/host-signal.h | 37 ++++++++++++++++++++++++++++++++ > 1 file changed, 37 insertions(+) > create mode 100644 bsd-user/host/i386/host-signal.h Reviewed-by: Richard Henderson <richard.henderson@linaro.org> r~
diff --git a/bsd-user/host/i386/host-signal.h b/bsd-user/host/i386/host-signal.h new file mode 100644 index 00000000000..169e61b154c --- /dev/null +++ b/bsd-user/host/i386/host-signal.h @@ -0,0 +1,37 @@ +/* + * host-signal.h: signal info dependent on the host architecture + * + * Copyright (c) 2021 Warner Losh + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#ifndef I386_HOST_SIGNAL_H +#define I386_HOST_SIGNAL_H + +#include <sys/ucontext.h> +#include <machine/trap.h> +#include <vm/pmap.h> +#include <machine/pmap.h> + +static inline uintptr_t host_signal_pc(ucontext_t *uc) +{ + return uc->uc_mcontext.mc_eip; +} + +static inline void host_signal_set_pc(ucontext_t *uc, uintptr_t pc) +{ + uc->uc_mcontext.mc_eip = pc; +} + +static inline bool host_signal_write(siginfo_t *info, ucontext_t *uc) +{ + /* + * Look in sys/i386/i386/trap.c. NOTE: mc_err == tr_err due to type punning + * between a trapframe and mcontext on FreeBSD/i386. + */ + return uc->uc_mcontext.mc_trapno == T_PAGEFLT && + uc->uc_mcontext.mc_err & PGEX_W; +} + +#endif