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bsd-user/signal.c: tswap_siginfo 

Convert siginfo from targer to host.

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Kyle Evans <kevans@freebsd.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
master
Warner Losh 2022-01-08 21:48:25 -07:00
parent 6c6d4b5616
commit 08eb66d5d8
1 changed files with 53 additions and 0 deletions
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53
bsd-user/signal.c
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@ -256,6 +256,59 @@ static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo,
tinfo->si_code = deposit32(si_code, 24, 8, si_type);
}
static void tswap_siginfo(target_siginfo_t *tinfo, const target_siginfo_t *info)
{
int si_type = extract32(info->si_code, 24, 8);
int si_code = sextract32(info->si_code, 0, 24);
__put_user(info->si_signo, &tinfo->si_signo);
__put_user(info->si_errno, &tinfo->si_errno);
__put_user(si_code, &tinfo->si_code); /* Zero out si_type, it's internal */
__put_user(info->si_pid, &tinfo->si_pid);
__put_user(info->si_uid, &tinfo->si_uid);
__put_user(info->si_status, &tinfo->si_status);
__put_user(info->si_addr, &tinfo->si_addr);
/*
* Unswapped, because we passed it through mostly untouched. si_value is
* opaque to the kernel, so we didn't bother with potentially wasting cycles
* to swap it into host byte order.
*/
tinfo->si_value.sival_ptr = info->si_value.sival_ptr;
/*
* We can use our internal marker of which fields in the structure
* are valid, rather than duplicating the guesswork of
* host_to_target_siginfo_noswap() here.
*/
switch (si_type) {
case QEMU_SI_NOINFO: /* No additional info */
break;
case QEMU_SI_FAULT:
__put_user(info->_reason._fault._trapno,
&tinfo->_reason._fault._trapno);
break;
case QEMU_SI_TIMER:
__put_user(info->_reason._timer._timerid,
&tinfo->_reason._timer._timerid);
__put_user(info->_reason._timer._overrun,
&tinfo->_reason._timer._overrun);
break;
case QEMU_SI_MESGQ:
__put_user(info->_reason._mesgq._mqd, &tinfo->_reason._mesgq._mqd);
break;
case QEMU_SI_POLL:
/* Note: Not generated on FreeBSD */
__put_user(info->_reason._poll._band, &tinfo->_reason._poll._band);
break;
case QEMU_SI_CAPSICUM:
__put_user(info->_reason._capsicum._syscall,
&tinfo->_reason._capsicum._syscall);
break;
default:
g_assert_not_reached();
}
}
/* Returns 1 if given signal should dump core if not handled. */
static int core_dump_signal(int sig)
{