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authorWarner Losh <imp@bsdimp.com>2022-01-08 21:48:25 -0700
committerWarner Losh <imp@bsdimp.com>2022-01-28 15:53:41 -0700
commit08eb66d5d837c2db9d5d57553da8448fd8e36571 (patch)
tree43024629fc5b409a8348a53e64a9af445d9a42e7 /bsd-user
parent6c6d4b5616b391934851f049f41a7cbde12140d9 (diff)
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>
Diffstat (limited to 'bsd-user')
-rw-r--r--bsd-user/signal.c53
1 files changed, 53 insertions, 0 deletions
diff --git a/bsd-user/signal.c b/bsd-user/signal.c
index 366e047ccc..34e8c811ad 100644
--- a/bsd-user/signal.c
+++ b/bsd-user/signal.c
@@ -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)
{