Implement the openat() linux syscall

Submitted by:	Roman Divacky (rdivacky@)
MFC after:	2 weeks

5 files changed, 11 insertions, 5 deletions

diff --git a/sys/amd64/linux32/linux.h b/sys/amd64/linux32/linux.h
index cf9b14c..b998402 100644
--- a/sys/amd64/linux32/linux.h
+++ b/sys/amd64/linux32/linux.h
@@ -531,6 +531,7 @@ int	linux_ioctl_unregister_handler(struct linux_ioctl_handler *h);
 #define	LINUX_O_RDONLY		00000000
 #define	LINUX_O_WRONLY		00000001
 #define	LINUX_O_RDWR		00000002
+#define	LINUX_O_ACCMODE		00000003
 #define	LINUX_O_CREAT		00000100
 #define	LINUX_O_EXCL		00000200
 #define	LINUX_O_NOCTTY		00000400
@@ -565,6 +566,8 @@ int	linux_ioctl_unregister_handler(struct linux_ioctl_handler *h);
 #define	LINUX_F_WRLCK		1
 #define	LINUX_F_UNLCK		2
 
+#define	LINUX_AT_FDCWD		-100
+
 /*
  * mount flags
  */
diff --git a/sys/amd64/linux32/linux32_dummy.c b/sys/amd64/linux32/linux32_dummy.c
index 5babd4c..5f4b797 100644
--- a/sys/amd64/linux32/linux32_dummy.c
+++ b/sys/amd64/linux32/linux32_dummy.c
@@ -97,7 +97,6 @@ DUMMY(inotify_init);
 DUMMY(inotify_add_watch);
 DUMMY(inotify_rm_watch);
 DUMMY(migrate_pages);
-DUMMY(openat);
 DUMMY(mkdirat);
 DUMMY(mknodat);
 DUMMY(fchownat);
diff --git a/sys/amd64/linux32/linux32_proto.h b/sys/amd64/linux32/linux32_proto.h
index e8a5b10..0ad4576 100644
--- a/sys/amd64/linux32/linux32_proto.h
+++ b/sys/amd64/linux32/linux32_proto.h
@@ -871,7 +871,10 @@ struct linux_migrate_pages_args {
 	register_t dummy;
 };
 struct linux_openat_args {
-	register_t dummy;
+	char dfd_l_[PADL_(l_int)]; l_int dfd; char dfd_r_[PADR_(l_int)];
+	char filename_l_[PADL_(char *)]; char * filename; char filename_r_[PADR_(char *)];
+	char flags_l_[PADL_(l_int)]; l_int flags; char flags_r_[PADR_(l_int)];
+	char mode_l_[PADL_(l_int)]; l_int mode; char mode_r_[PADR_(l_int)];
 };
 struct linux_mkdirat_args {
 	register_t dummy;
@@ -1381,7 +1384,7 @@ int	linux_unshare(struct thread *, struct linux_unshare_args *);
 #define	LINUX_SYS_AUE_linux_inotify_add_watch	AUE_NULL
 #define	LINUX_SYS_AUE_linux_inotify_rm_watch	AUE_NULL
 #define	LINUX_SYS_AUE_linux_migrate_pages	AUE_NULL
-#define	LINUX_SYS_AUE_linux_openat	AUE_NULL
+#define	LINUX_SYS_AUE_linux_openat	AUE_OPEN_RWTC
 #define	LINUX_SYS_AUE_linux_mkdirat	AUE_NULL
 #define	LINUX_SYS_AUE_linux_mknodat	AUE_NULL
 #define	LINUX_SYS_AUE_linux_fchownat	AUE_NULL
diff --git a/sys/amd64/linux32/linux32_sysent.c b/sys/amd64/linux32/linux32_sysent.c
index 3bd1885..19c86ce 100644
--- a/sys/amd64/linux32/linux32_sysent.c
+++ b/sys/amd64/linux32/linux32_sysent.c
@@ -315,7 +315,7 @@ struct sysent linux_sysent[] = {
 	{ 0, (sy_call_t *)linux_inotify_add_watch, AUE_NULL, NULL, 0, 0 },	/* 292 = linux_inotify_add_watch */
 	{ 0, (sy_call_t *)linux_inotify_rm_watch, AUE_NULL, NULL, 0, 0 },	/* 293 = linux_inotify_rm_watch */
 	{ 0, (sy_call_t *)linux_migrate_pages, AUE_NULL, NULL, 0, 0 },	/* 294 = linux_migrate_pages */
-	{ 0, (sy_call_t *)linux_openat, AUE_NULL, NULL, 0, 0 },	/* 295 = linux_openat */
+	{ AS(linux_openat_args), (sy_call_t *)linux_openat, AUE_OPEN_RWTC, NULL, 0, 0 },	/* 295 = linux_openat */
 	{ 0, (sy_call_t *)linux_mkdirat, AUE_NULL, NULL, 0, 0 },	/* 296 = linux_mkdirat */
 	{ 0, (sy_call_t *)linux_mknodat, AUE_NULL, NULL, 0, 0 },	/* 297 = linux_mknodat */
 	{ 0, (sy_call_t *)linux_fchownat, AUE_NULL, NULL, 0, 0 },	/* 298 = linux_fchownat */
diff --git a/sys/amd64/linux32/syscalls.master b/sys/amd64/linux32/syscalls.master
index 9c3ee1e..9fc4cb0 100644
--- a/sys/amd64/linux32/syscalls.master
+++ b/sys/amd64/linux32/syscalls.master
@@ -463,7 +463,8 @@
 292	AUE_NULL	STD	{ int linux_inotify_add_watch(void); }
 293	AUE_NULL	STD	{ int linux_inotify_rm_watch(void); }
 294	AUE_NULL	STD	{ int linux_migrate_pages(void); }
-295	AUE_NULL	STD	{ int linux_openat(void); }
+295	AUE_OPEN_RWTC	STD	{ int linux_openat(l_int dfd, char *filename, \
+					l_int flags, l_int mode); }
 296	AUE_NULL	STD	{ int linux_mkdirat(void); }
 297	AUE_NULL	STD	{ int linux_mknodat(void); }
 298	AUE_NULL	STD	{ int linux_fchownat(void); }