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linux-user: add tee, splice and vmsplice

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Add support for tee, splice and vmsplice.

Originally from: vibi sreenivasan <vibi_sreenivasan@cms.com>

Riku: squashed patches together, added a test to configure
and removed compliler warning by picking up correct type for
splice param

Signed-off-by: vibisreenivasan <vibi_sreenivasan@cms.com>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
This commit is contained in:
vibisreenivasan 2009-05-16 18:32:41 +05:30 • committed by Riku Voipio
parent 099d6b0fe9
commit 3ce34dfb42
2 changed files with 63 additions and 0 deletions
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40
linux-user/syscall.c
View file

@ -6865,6 +6865,46 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
break;
#endif
#ifdef CONFIG_SPLICE
#ifdef TARGET_NR_tee
case TARGET_NR_tee:
{
ret = get_errno(tee(arg1,arg2,arg3,arg4));
}
break;
#endif
#ifdef TARGET_NR_splice
case TARGET_NR_splice:
{
loff_t loff_in, loff_out;
loff_t *ploff_in = NULL, *ploff_out = NULL;
if(arg2) {
get_user_u64(loff_in, arg2);
ploff_in = &loff_in;
}
if(arg4) {
get_user_u64(loff_out, arg2);
ploff_out = &loff_out;
}
ret = get_errno(splice(arg1, ploff_in, arg3, ploff_out, arg5, arg6));
}
break;
#endif
#ifdef TARGET_NR_vmsplice
case TARGET_NR_vmsplice:
{
int count = arg3;
struct iovec *vec;
vec = alloca(count * sizeof(struct iovec));
if (lock_iovec(VERIFY_READ, vec, arg2, count, 1) < 0)
goto efault;
ret = get_errno(vmsplice(arg1, vec, count, arg4));
unlock_iovec(vec, arg2, count, 0);
}
break;
#endif
#endif /* CONFIG_SPLICE */
default:
unimplemented:
gemu_log("qemu: Unsupported syscall: %d\n", num);