No attempt is made to emulate it on the host.
Signed-off-by: Andreas Schwab <schwab@suse.de>
---
v2: fix spacing
---
linux-user/syscall.c | 39 +++++++++++++++++++++++++++++++++++++++
1 file changed, 39 insertions(+)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index bed154139e..92b4f59c05 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -1033,6 +1033,12 @@ safe_syscall5(int, mq_timedsend, int, mqdes, const char *, msg_ptr,
safe_syscall5(int, mq_timedreceive, int, mqdes, char *, msg_ptr,
size_t, len, unsigned *, prio, const struct timespec *, timeout)
#endif
+#if defined(TARGET_NR_copy_file_range) && defined(__NR_copy_file_range)
+safe_syscall6(ssize_t, copy_file_range, int, infd, loff_t *, pinoff,
+ int, outfd, loff_t *, poutoff, size_t, length,
+ unsigned int, flags)
+#endif
+
/* We do ioctl like this rather than via safe_syscall3 to preserve the
* "third argument might be integer or pointer or not present" behaviour of
* the libc function.
@@ -12601,6 +12607,39 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
ret = get_errno(kcmp(arg1, arg2, arg3, arg4, arg5));
break;
#endif
+#if defined(TARGET_NR_copy_file_range) && defined(__NR_copy_file_range)
+ case TARGET_NR_copy_file_range:
+ {
+ loff_t inoff, outoff;
+ loff_t *pinoff = NULL, *poutoff = NULL;
+
+ if (arg2) {
+ if (get_user_u64(inoff, arg2)) {
+ goto efault;
+ }
+ pinoff = &inoff;
+ }
+ if (arg4) {
+ if (get_user_u64(outoff, arg4)) {
+ goto efault;
+ }
+ poutoff = &outoff;
+ }
+ ret = get_errno(safe_copy_file_range(arg1, pinoff, arg3, poutoff,
+ arg5, arg6));
+ if (arg2) {
+ if (put_user_u64(inoff, arg2)) {
+ goto efault;
+ }
+ }
+ if (arg4) {
+ if (put_user_u64(outoff, arg4)) {
+ goto efault;
+ }
+ }
+ }
+ break;
+#endif
default:
unimplemented:
--
2.16.1
--
Andreas Schwab, SUSE Labs, schwab@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."
Le 06/02/2018 à 11:31, Andreas Schwab a écrit : > No attempt is made to emulate it on the host. I don't understand what you mean here... > Signed-off-by: Andreas Schwab <schwab@suse.de> > --- > v2: fix spacing > --- > linux-user/syscall.c | 39 +++++++++++++++++++++++++++++++++++++++ > 1 file changed, 39 insertions(+) > > diff --git a/linux-user/syscall.c b/linux-user/syscall.c > index bed154139e..92b4f59c05 100644 > --- a/linux-user/syscall.c > +++ b/linux-user/syscall.c ... > +#if defined(TARGET_NR_copy_file_range) && defined(__NR_copy_file_range) > + case TARGET_NR_copy_file_range: > + { > + loff_t inoff, outoff; > + loff_t *pinoff = NULL, *poutoff = NULL; > + > + if (arg2) { > + if (get_user_u64(inoff, arg2)) { > + goto efault; > + } > + pinoff = &inoff; > + } > + if (arg4) { > + if (get_user_u64(outoff, arg4)) { > + goto efault; > + } > + poutoff = &outoff; > + } > + ret = get_errno(safe_copy_file_range(arg1, pinoff, arg3, poutoff, > + arg5, arg6)); > + if (arg2) { > + if (put_user_u64(inoff, arg2)) { > + goto efault; > + } > + } > + if (arg4) { > + if (put_user_u64(outoff, arg4)) { > + goto efault; > + } > + } According to the linux implementation, this should be something like: if (ret > 0) { if (arg2) { if (put_user_u64(inoff, arg2)) { ret = -TARGET_EFAULT; } } if (arg4) { if (put_user_u64(outoff, arg4)) { ret = -TARGET_EFAULT; } } } [TARGET_NR_splice should do this the same way] Thanks, Laurent
On Feb 15 2018, Laurent Vivier <laurent@vivier.eu> wrote: > Le 06/02/2018 à 11:31, Andreas Schwab a écrit : >> No attempt is made to emulate it on the host. > > I don't understand what you mean here... If your host doesn't have it, neither will the emulation. Andreas. -- Andreas Schwab, SUSE Labs, schwab@suse.de GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7 "And now for something completely different."
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