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Steve Capper

2013-Nov-08 17:12 UTC

[klibc] [PATCH 0/3] Introduce arm64 support

Hello,

This series introduces arm64 support to klibc.

I've rebased the work from Neil Williams and Anil Singhar into the
following three patches. Most of the code changes are due to new
syscall implementations being needed for arm64 as a only a minimal set
of syscalls are defined in the arm64 kernel.

This series is to be applied against the latest klibc, just after
 25a66fa README.klibc: update build information

I have tested this series on x86_64 running Ubuntu 13.04 in KVM, on ARM
running Fedora 18 on an Arndale board, and for Aarch64 by running Open
Embedded on the ARMv8A FVP model.

The testing regime included running the klibc supplied tests, as well
as running the mksh test suite (with mksh both statically compiled and
linked against /lib/klibc-xxxxx.so).

Any comments/critique/flames welcome.

Cheers,
-- 
Steve

Steve Capper (3):
  syscalls: Fixup some syscalls
  syscalls: Add syscalls needed by arm64
  arm64: Introduce arm64 support

 Makefile                                  |  3 +-
 usr/include/arch/arm64/klibc/archconfig.h | 17 ++++++++++
 usr/include/arch/arm64/klibc/archsetjmp.h | 20 ++++++++++++
 usr/include/arch/arm64/klibc/archsignal.h | 14 +++++++++
 usr/include/arch/arm64/klibc/archstat.h   | 29 +++++++++++++++++
 usr/include/arch/arm64/klibc/asmmacros.h  | 11 +++++++
 usr/include/sys/stat.h                    |  3 +-
 usr/include/unistd.h                      |  7 +++--
 usr/klibc/Kbuild                          |  3 ++
 usr/klibc/README.klibc                    |  1 +
 usr/klibc/SYSCALLS.def                    | 47 ++++++++++++++--------------
 usr/klibc/access.c                        | 12 +++++++
 usr/klibc/arch/arm64/Kbuild               |  7 +++++
 usr/klibc/arch/arm64/MCONFIG              | 23 ++++++++++++++
 usr/klibc/arch/arm64/crt0.S               | 19 +++++++++++
 usr/klibc/arch/arm64/pipe.c               | 10 ++++++
 usr/klibc/arch/arm64/setjmp.S             | 52 +++++++++++++++++++++++++++++++
 usr/klibc/arch/arm64/syscall.S            | 25 +++++++++++++++
 usr/klibc/arch/arm64/sysstub.ph           | 25 +++++++++++++++
 usr/klibc/arch/arm64/vfork.S              | 34 ++++++++++++++++++++
 usr/klibc/chmod.c                         | 17 ++++++++++
 usr/klibc/chown.c                         | 12 +++++++
 usr/klibc/dup2.c                          | 11 +++++++
 usr/klibc/lchown.c                        | 12 +++++++
 usr/klibc/link.c                          | 12 +++++++
 usr/klibc/lstat.c                         | 17 ++++++++++
 usr/klibc/mkdir.c                         | 14 +++++++++
 usr/klibc/mknod.c                         | 14 +++++++++
 usr/klibc/open64.c                        | 22 +++++++++++++
 usr/klibc/poll.c                          | 21 +++++++++++++
 usr/klibc/readlink.c                      | 12 +++++++
 usr/klibc/rename.c                        | 11 +++++++
 usr/klibc/rmdir.c                         | 12 +++++++
 usr/klibc/select.c                        | 34 ++++++++++++++++++++
 usr/klibc/stat.c                          | 17 ++++++++++
 usr/klibc/symlink.c                       | 12 +++++++
 usr/klibc/unlink.c                        | 12 +++++++
 usr/klibc/utimes.c                        | 20 ++++++++++++
 38 files changed, 616 insertions(+), 28 deletions(-)
 create mode 100644 usr/include/arch/arm64/klibc/archconfig.h
 create mode 100644 usr/include/arch/arm64/klibc/archsetjmp.h
 create mode 100644 usr/include/arch/arm64/klibc/archsignal.h
 create mode 100644 usr/include/arch/arm64/klibc/archstat.h
 create mode 100644 usr/include/arch/arm64/klibc/asmmacros.h
 create mode 100644 usr/klibc/access.c
 create mode 100644 usr/klibc/arch/arm64/Kbuild
 create mode 100644 usr/klibc/arch/arm64/MCONFIG
 create mode 100644 usr/klibc/arch/arm64/crt0.S
 create mode 100644 usr/klibc/arch/arm64/pipe.c
 create mode 100644 usr/klibc/arch/arm64/setjmp.S
 create mode 100644 usr/klibc/arch/arm64/syscall.S
 create mode 100644 usr/klibc/arch/arm64/sysstub.ph
 create mode 100644 usr/klibc/arch/arm64/vfork.S
 create mode 100644 usr/klibc/chmod.c
 create mode 100644 usr/klibc/chown.c
 create mode 100644 usr/klibc/dup2.c
 create mode 100644 usr/klibc/lchown.c
 create mode 100644 usr/klibc/link.c
 create mode 100644 usr/klibc/lstat.c
 create mode 100644 usr/klibc/mkdir.c
 create mode 100644 usr/klibc/mknod.c
 create mode 100644 usr/klibc/open64.c
 create mode 100644 usr/klibc/poll.c
 create mode 100644 usr/klibc/readlink.c
 create mode 100644 usr/klibc/rename.c
 create mode 100644 usr/klibc/rmdir.c
 create mode 100644 usr/klibc/select.c
 create mode 100644 usr/klibc/stat.c
 create mode 100644 usr/klibc/symlink.c
 create mode 100644 usr/klibc/unlink.c
 create mode 100644 usr/klibc/utimes.c

-- 
1.8.1.4

Steve Capper

2013-Nov-08 17:12 UTC

head link

[klibc] [PATCH 1/3] syscalls: Fixup some syscalls

mknodat and mkdirat contain a spurious repeated parameter, linkat
is missing the final int flags parameter, and symlinkat has the
first two parameters transposed.

Also declarations are missing for utimensat and fchownat.

This patch fixes up these syscall declarations.

Signed-off-by: Steve Capper <steve.capper at linaro.org>
---
 usr/include/sys/stat.h | 3 ++-
 usr/include/unistd.h   | 7 ++++---
 usr/klibc/SYSCALLS.def | 6 +++---
 3 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/usr/include/sys/stat.h b/usr/include/sys/stat.h
index 4850429..46f36f5 100644
--- a/usr/include/sys/stat.h
+++ b/usr/include/sys/stat.h
@@ -69,8 +69,9 @@ __extern int fstatat(int, const char *, struct stat *, int);
 __extern int lstat(const char *, struct stat *);
 __extern mode_t umask(mode_t);
 __extern int mknod(const char *, mode_t, dev_t);
-__extern int mknodat(int, const char *, const char *, mode_t, dev_t);
+__extern int mknodat(int, const char *, mode_t, dev_t);
 __extern int mkfifo(const char *, mode_t);
+__extern int utimensat(int, const char *, const struct timespec *, int);
 
 __extern_inline int mkfifo(const char *__p, mode_t __m)
 {
diff --git a/usr/include/unistd.h b/usr/include/unistd.h
index f0e19c2..606eccd 100644
--- a/usr/include/unistd.h
+++ b/usr/include/unistd.h
@@ -61,7 +61,7 @@ __extern int setfsuid(uid_t);
 __extern int access(const char *, int);
 __extern int faccessat(int, const char *, int, int);
 __extern int link(const char *, const char *);
-__extern int linkat(int, const char *, int, const char *);
+__extern int linkat(int, const char *, int, const char *, int);
 __extern int unlink(const char *);
 __extern int unlinkat(int, const char *, int);
 __extern int chdir(const char *);
@@ -70,19 +70,20 @@ __extern int chmod(const char *, mode_t);
 __extern int fchmod(int, mode_t);
 __extern int fchmodat(int, const char *, mode_t);
 __extern int mkdir(const char *, mode_t);
-__extern int mkdirat(int, const char *, const char *, mode_t);
+__extern int mkdirat(int, const char *, mode_t);
 __extern int rmdir(const char *);
 __extern int pipe(int *);
 __extern int pipe2(int *, int);
 __extern int chroot(const char *);
 __extern int symlink(const char *, const char *);
-__extern int symlinkat(int, const char *, const char *);
+__extern int symlinkat(const char *, int, const char *);
 __extern int readlink(const char *, char *, size_t);
 __extern int readlinkat(int, const char *, char *, size_t);
 __extern int chown(const char *, uid_t, gid_t);
 __extern int fchown(int, uid_t, gid_t);
 __extern int lchown(const char *, uid_t, gid_t);
 __extern char *getcwd(char *, size_t);
+__extern int fchownat(int, const char *, uid_t, gid_t, int);
 
 /* Also in <fcntl.h> */
 #ifndef _KLIBC_IN_OPEN_C
diff --git a/usr/klibc/SYSCALLS.def b/usr/klibc/SYSCALLS.def
index 9b07aa2..4630d14 100644
--- a/usr/klibc/SYSCALLS.def
+++ b/usr/klibc/SYSCALLS.def
@@ -109,7 +109,7 @@ int swapoff(const char *);
 int access(const char *, int);
 int faccessat(int, const char *, int, int);
 int link(const char *, const char *);
-<?> int linkat(int, const char *, int, const char *);
+<?> int linkat(int, const char *, int, const char *, int);
 int unlink(const char *);
 <?> int unlinkat(int, const char *, int);
 int chdir(const char *);
@@ -117,12 +117,12 @@ int fchdir(int);
 int rename(const char *, const char *);
 <?> int renameat(int, const char *, int, const char *);
 int mknod(const char *, mode_t, dev_t);
-<?> int mknodat(int, const char *, const char *, mode_t, dev_t);
+<?> int mknodat(int, const char *, mode_t, dev_t);
 int chmod(const char *, mode_t);
 int fchmod(int, mode_t);
 <?> int fchmodat(int, const char *, mode_t);
 int mkdir(const char *, mode_t);
-<?> int mkdirat(int, const char *, const char *, mode_t);
+<?> int mkdirat(int, const char *, mode_t);
 int rmdir(const char *);
 <!alpha,ia64,mips,mips64,sh,sparc,sparc64> int pipe(int *);
 int pipe2(int *, int);
-- 
1.8.1.4

Steve Capper

2013-Nov-08 17:12 UTC

head link

[klibc] [PATCH 2/3] syscalls: Add syscalls needed by arm64

arm64 uses generic syscalls, and does not include the "noat",
"noflags", and "deprecated" syscalls.
i.e. __ARCH_WANT_SYSCALL_{NO_AT|NO_FLAGS|DEPRECATED}

This patch adds the syscalls needed for klibc to run on arm64.

Signed-off-by: Steve Capper <steve.capper at linaro.org>
---
 usr/klibc/Kbuild       |  3 +++
 usr/klibc/SYSCALLS.def | 33 +++++++++++++++++----------------
 usr/klibc/access.c     | 12 ++++++++++++
 usr/klibc/chmod.c      | 17 +++++++++++++++++
 usr/klibc/chown.c      | 12 ++++++++++++
 usr/klibc/dup2.c       | 11 +++++++++++
 usr/klibc/lchown.c     | 12 ++++++++++++
 usr/klibc/link.c       | 12 ++++++++++++
 usr/klibc/lstat.c      | 17 +++++++++++++++++
 usr/klibc/mkdir.c      | 14 ++++++++++++++
 usr/klibc/mknod.c      | 14 ++++++++++++++
 usr/klibc/open64.c     | 22 ++++++++++++++++++++++
 usr/klibc/poll.c       | 21 +++++++++++++++++++++
 usr/klibc/readlink.c   | 12 ++++++++++++
 usr/klibc/rename.c     | 11 +++++++++++
 usr/klibc/rmdir.c      | 12 ++++++++++++
 usr/klibc/select.c     | 34 ++++++++++++++++++++++++++++++++++
 usr/klibc/stat.c       | 17 +++++++++++++++++
 usr/klibc/symlink.c    | 12 ++++++++++++
 usr/klibc/unlink.c     | 12 ++++++++++++
 usr/klibc/utimes.c     | 20 ++++++++++++++++++++
 21 files changed, 314 insertions(+), 16 deletions(-)
 create mode 100644 usr/klibc/access.c
 create mode 100644 usr/klibc/chmod.c
 create mode 100644 usr/klibc/chown.c
 create mode 100644 usr/klibc/dup2.c
 create mode 100644 usr/klibc/lchown.c
 create mode 100644 usr/klibc/link.c
 create mode 100644 usr/klibc/lstat.c
 create mode 100644 usr/klibc/mkdir.c
 create mode 100644 usr/klibc/mknod.c
 create mode 100644 usr/klibc/open64.c
 create mode 100644 usr/klibc/poll.c
 create mode 100644 usr/klibc/readlink.c
 create mode 100644 usr/klibc/rename.c
 create mode 100644 usr/klibc/rmdir.c
 create mode 100644 usr/klibc/select.c
 create mode 100644 usr/klibc/stat.c
 create mode 100644 usr/klibc/symlink.c
 create mode 100644 usr/klibc/unlink.c
 create mode 100644 usr/klibc/utimes.c

diff --git a/usr/klibc/Kbuild b/usr/klibc/Kbuild
index 2bef9ca..7e185e2 100644
--- a/usr/klibc/Kbuild
+++ b/usr/klibc/Kbuild
@@ -58,6 +58,9 @@ klib-y += vsnprintf.o snprintf.o vsprintf.o sprintf.o \
 	  inet/inet_ntoa.o inet/inet_aton.o inet/inet_addr.o \
 	  inet/inet_ntop.o inet/inet_pton.o inet/bindresvport.o \
 	  send.o recv.o \
+	  access.o chmod.o chown.o dup2.o mknod.o poll.o rename.o stat.o \
+	  lchown.o link.o rmdir.o unlink.o utimes.o lstat.o mkdir.o \
+	  readlink.o select.o symlink.o open64.o \
 	  ctype/isalnum.o ctype/isalpha.o ctype/isascii.o \
 	  ctype/isblank.o ctype/iscntrl.o ctype/isdigit.o \
 	  ctype/isgraph.o ctype/islower.o ctype/isprint.o \
diff --git a/usr/klibc/SYSCALLS.def b/usr/klibc/SYSCALLS.def
index 4630d14..c2f36e7 100644
--- a/usr/klibc/SYSCALLS.def
+++ b/usr/klibc/SYSCALLS.def
@@ -106,31 +106,31 @@ int swapoff(const char *);
 /*
  * Inode-related system calls
  */
-int access(const char *, int);
+<?> int access(const char *, int);
 int faccessat(int, const char *, int, int);
-int link(const char *, const char *);
+<?> int link(const char *, const char *);
 <?> int linkat(int, const char *, int, const char *, int);
-int unlink(const char *);
+<?> int unlink(const char *);
 <?> int unlinkat(int, const char *, int);
 int chdir(const char *);
 int fchdir(int);
-int rename(const char *, const char *);
+<?> int rename(const char *, const char *);
 <?> int renameat(int, const char *, int, const char *);
-int mknod(const char *, mode_t, dev_t);
+<?> int mknod(const char *, mode_t, dev_t);
 <?> int mknodat(int, const char *, mode_t, dev_t);
-int chmod(const char *, mode_t);
+<?> int chmod(const char *, mode_t);
 int fchmod(int, mode_t);
 <?> int fchmodat(int, const char *, mode_t);
-int mkdir(const char *, mode_t);
+<?> int mkdir(const char *, mode_t);
 <?> int mkdirat(int, const char *, mode_t);
-int rmdir(const char *);
+<?> int rmdir(const char *);
 <!alpha,ia64,mips,mips64,sh,sparc,sparc64> int pipe(int *);
 int pipe2(int *, int);
 mode_t umask(mode_t);
 int chroot(const char *);
-int symlink(const char *, const char *);
+<?> int symlink(const char *, const char *);
 <?> int symlinkat(const char *, int, const char *);
-int readlink(const char *, char *, size_t);
+<?> int readlink(const char *, char *, size_t);
 <?> int readlinkat(int, const char *, char *, int);
 <!ppc64> int stat64,stat::stat(const char *, struct stat *);
 <!ppc64> int lstat64,lstat::lstat(const char *, struct stat *);
@@ -141,14 +141,15 @@ int readlink(const char *, char *, size_t);
 /* XXX: Is this right?! */
 <?> int fstatat64,newfstatat,fstatat::fstatat(int, const char *, struct
stat *, int);
 int getdents64,getdents::getdents(unsigned int, struct dirent *, unsigned int);
-int chown32,chown::chown(const char *, uid_t, gid_t);
+<?> int chown32,chown::chown(const char *, uid_t, gid_t);
 int fchown32,fchown::fchown(int, uid_t, gid_t);
 <?> int fchownat(int, const char *, uid_t, gid_t, int);
-int lchown32,lchown::lchown(const char *, uid_t, gid_t);
+<?> int lchown32,lchown::lchown(const char *, uid_t, gid_t);
 int getcwd::__getcwd(char *, size_t);
 <?> int utime(const char *, const struct utimbuf *);
 <?> int utimes(const char *, const struct timeval *);
 <?> int futimesat(int, const char *, const struct timeval *);
+<?> int utimensat(int, const char *, const struct timespec *, int);
 <?> int inotify_init();
 <?> int inotify_add_watch(int, const char *, __u32);
 <?> int inotify_rm_watch(int, __u32);
@@ -158,7 +159,7 @@ int getcwd::__getcwd(char *, size_t);
  */
 <!i386,m68k,64> int open::__open(const char *, int, mode_t);
 <?!i386,m68k,64> int openat::__openat(int, const char *, int, mode_t);
-<64> int open(const char *, int, mode_t);
+<?64> int open(const char *, int, mode_t);
 <64> int openat(int, const char *, int, mode_t);
 ssize_t read(int, void *, size_t);
 ssize_t write(int, const void *, size_t);
@@ -166,14 +167,14 @@ int close(int);
 <64> off_t lseek(int, off_t, int);
 <32> int _llseek::__llseek(int, unsigned long, unsigned long, off_t *,
int);
 int dup(int);
-int dup2(int, int);
+<?> int dup2(int, int);
 int dup3(int, int, int);
 <i386> int fcntl64 at varadic::fcntl(int, int, unsigned long);
 <ppc64> int fcntl(int, int, unsigned long);
 <!i386,ppc64> int fcntl64,fcntl::fcntl(int, int, unsigned long);
 int ioctl(int, int, void *);
 int flock(int, int);
-int _newselect,select::select(int, fd_set *, fd_set *, fd_set *, struct timeval
*);
+<?> int _newselect,select::select(int, fd_set *, fd_set *, fd_set *,
struct timeval *);
 #if defined(__NR_pselect) && !_KLIBC_USE_RT_SIG
 int pselect(int, fd_set *, fd_set *, fd_set *, const struct timespec *, const
sigset_t *);
 #elif defined(__NR_pselect7)
@@ -181,7 +182,7 @@ int pselect7::__pselect7(int, fd_set *, fd_set *, fd_set *,
struct timespec *, c
 #elif defined(__NR_pselect6)
 int pselect6::__pselect6(int, fd_set *, fd_set *, fd_set *, struct timespec *,
const struct __pselect6 *);
 #endif
-int poll(struct pollfd *, nfds_t, long);
+<?> int poll(struct pollfd *, nfds_t, long);
 <?> int ppoll::__ppoll(struct pollfd *, nfds_t, struct timespec *, const
sigset_t *, size_t);
 int fsync(int);
 int fdatasync,fsync::fdatasync(int);
diff --git a/usr/klibc/access.c b/usr/klibc/access.c
new file mode 100644
index 0000000..0f24856
--- /dev/null
+++ b/usr/klibc/access.c
@@ -0,0 +1,12 @@
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+
+#ifndef __NR_access
+
+int access(const char *pathname, int mode)
+{
+	return faccessat(AT_FDCWD, pathname, mode, 0);
+}
+
+#endif  /* __NR_access */
diff --git a/usr/klibc/chmod.c b/usr/klibc/chmod.c
new file mode 100644
index 0000000..d067752
--- /dev/null
+++ b/usr/klibc/chmod.c
@@ -0,0 +1,17 @@
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/syscall.h>
+
+#ifndef __NR_chmod
+
+int chmod(const char *path, mode_t mode)
+{
+	int fd = open(path, O_RDONLY);
+	int ret = fchmod(fd, mode);
+	close(fd);
+	return ret;
+}
+
+#endif  /* __NR_chmod */
diff --git a/usr/klibc/chown.c b/usr/klibc/chown.c
new file mode 100644
index 0000000..089cfc5
--- /dev/null
+++ b/usr/klibc/chown.c
@@ -0,0 +1,12 @@
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+
+#ifndef __NR_chown
+
+int chown(const char *path, uid_t owner, gid_t group)
+{
+	return fchownat(AT_FDCWD, path, owner, group, 0);
+}
+
+#endif  /* __NR_chown  */
diff --git a/usr/klibc/dup2.c b/usr/klibc/dup2.c
new file mode 100644
index 0000000..67e2171
--- /dev/null
+++ b/usr/klibc/dup2.c
@@ -0,0 +1,11 @@
+#include <unistd.h>
+#include <sys/syscall.h>
+
+#ifndef __NR_dup2
+
+int dup2(int fd, int fd2)
+{
+	return dup3(fd, fd2, 0);
+}
+
+#endif /* __NR_dup2 */
diff --git a/usr/klibc/lchown.c b/usr/klibc/lchown.c
new file mode 100644
index 0000000..9a9e1e1
--- /dev/null
+++ b/usr/klibc/lchown.c
@@ -0,0 +1,12 @@
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+
+#ifndef __NR_lchown
+
+int lchown(const char *path, uid_t owner, gid_t group)
+{
+	return fchownat(AT_FDCWD, path, owner, group, AT_SYMLINK_NOFOLLOW);
+}
+
+#endif /* __NR_lchown */
diff --git a/usr/klibc/link.c b/usr/klibc/link.c
new file mode 100644
index 0000000..1d4b70e
--- /dev/null
+++ b/usr/klibc/link.c
@@ -0,0 +1,12 @@
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+
+#ifndef __NR_link
+
+int link(const char *oldpath, const char *newpath)
+{
+	return linkat(AT_FDCWD, oldpath, AT_FDCWD, newpath, 0);
+}
+
+#endif  /* __NR_link */
diff --git a/usr/klibc/lstat.c b/usr/klibc/lstat.c
new file mode 100644
index 0000000..0282eec
--- /dev/null
+++ b/usr/klibc/lstat.c
@@ -0,0 +1,17 @@
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/syscall.h>
+
+#ifndef __NR_lstat
+
+int lstat(const char *path, struct stat *buf)
+{
+	int fd = open(path, O_RDONLY | O_PATH | O_NOFOLLOW);
+	int ret = fstat(fd, buf);
+	close(fd);
+	return ret;
+}
+
+#endif  /* __NR_lstat  */
diff --git a/usr/klibc/mkdir.c b/usr/klibc/mkdir.c
new file mode 100644
index 0000000..27673e3
--- /dev/null
+++ b/usr/klibc/mkdir.c
@@ -0,0 +1,14 @@
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+
+#ifndef __NR_mkdir
+
+int mkdir(const char *pathname, mode_t mode)
+{
+	return mkdirat(AT_FDCWD, pathname, mode);
+}
+
+#endif /* __NR_mkdir */
diff --git a/usr/klibc/mknod.c b/usr/klibc/mknod.c
new file mode 100644
index 0000000..727505f
--- /dev/null
+++ b/usr/klibc/mknod.c
@@ -0,0 +1,14 @@
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+
+#ifndef __NR_mknod
+
+int mknod(const char *pathname, mode_t mode, dev_t dev)
+{
+	return mknodat(AT_FDCWD, pathname, mode, dev);
+}
+
+#endif  /* __NR_mknod  */
diff --git a/usr/klibc/open64.c b/usr/klibc/open64.c
new file mode 100644
index 0000000..6ca603e
--- /dev/null
+++ b/usr/klibc/open64.c
@@ -0,0 +1,22 @@
+/*
+ * open64.c
+ *
+ * For 64 bit systems without the open syscall, pass straight
+ * through into openat.
+ */
+
+#define _KLIBC_IN_OPEN_C
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/syscall.h>
+
+#if !defined(__NR_open) && _BITSIZE == 64
+
+__extern int openat(int, const char *, int, ...);
+
+int open(const char *pathname, int flags, mode_t mode)
+{
+	return openat(AT_FDCWD, pathname, flags, mode);
+}
+
+#endif
diff --git a/usr/klibc/poll.c b/usr/klibc/poll.c
new file mode 100644
index 0000000..69da693
--- /dev/null
+++ b/usr/klibc/poll.c
@@ -0,0 +1,21 @@
+#include <errno.h>
+#include <sys/poll.h>
+#include <sys/syscall.h>
+
+#ifndef __NR_poll
+
+int poll (struct pollfd *fds, nfds_t nfds, long timeout)
+{
+	struct timespec timeout_ts;
+	struct timespec *timeout_ts_p = NULL;
+
+	if (timeout >= 0) {
+		timeout_ts.tv_sec = timeout / 1000;
+		timeout_ts.tv_nsec = (timeout % 1000) * 1000000;
+		timeout_ts_p = &timeout_ts;
+	}
+
+	return ppoll(fds, nfds, timeout_ts_p, 0);
+}
+
+#endif /* __NR_poll */
diff --git a/usr/klibc/readlink.c b/usr/klibc/readlink.c
new file mode 100644
index 0000000..0e67442
--- /dev/null
+++ b/usr/klibc/readlink.c
@@ -0,0 +1,12 @@
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+
+#ifndef __NR_readlink
+
+int readlink(const char *path, char *buf, size_t bufsiz)
+{
+	return readlinkat(AT_FDCWD, path, buf, bufsiz);
+}
+
+#endif /* __NR_readlink */
diff --git a/usr/klibc/rename.c b/usr/klibc/rename.c
new file mode 100644
index 0000000..587c26f
--- /dev/null
+++ b/usr/klibc/rename.c
@@ -0,0 +1,11 @@
+#include <fcntl.h>
+#include <stdio.h>
+
+#ifndef __NR_rename
+
+int rename(const char *oldpath, const char *newpath)
+{
+	return renameat(AT_FDCWD, oldpath, AT_FDCWD, newpath);
+}
+
+#endif /* __NR_rename */
diff --git a/usr/klibc/rmdir.c b/usr/klibc/rmdir.c
new file mode 100644
index 0000000..94ae5f2
--- /dev/null
+++ b/usr/klibc/rmdir.c
@@ -0,0 +1,12 @@
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+
+#ifndef __NR_rmdir
+
+int rmdir(const char *pathname)
+{
+	return unlinkat(AT_FDCWD, pathname, AT_REMOVEDIR);
+}
+
+#endif /* __NR_rmdir */
diff --git a/usr/klibc/select.c b/usr/klibc/select.c
new file mode 100644
index 0000000..e416794
--- /dev/null
+++ b/usr/klibc/select.c
@@ -0,0 +1,34 @@
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/select.h>
+#include <errno.h>
+#include <sys/syscall.h>
+
+#if !defined(__NR_select) && !defined(__NR__newselect)
+
+struct __pselect6;
+__extern int __pselect6(int, fd_set *, fd_set *, fd_set *,
+                        const struct timespec *, const struct __pselect6 *);
+
+int select(int nfds, fd_set *readfds, fd_set *writefds,
+			fd_set *exceptfds, struct timeval *timeout)
+{
+	int result;
+	struct timespec ts;
+
+	if (timeout) {
+		ts.tv_sec = timeout->tv_sec;
+		ts.tv_nsec = timeout->tv_usec * 1000;
+	}
+
+	result = __pselect6(nfds, readfds, writefds, exceptfds, &ts, NULL);
+
+	if (timeout) {
+		timeout->tv_sec = ts.tv_sec;
+		timeout->tv_usec = ts.tv_nsec / 1000;
+	}
+
+	return result;
+}
+
+#endif
diff --git a/usr/klibc/stat.c b/usr/klibc/stat.c
new file mode 100644
index 0000000..92343f1
--- /dev/null
+++ b/usr/klibc/stat.c
@@ -0,0 +1,17 @@
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/syscall.h>
+
+#ifndef __NR_stat
+
+int stat(const char *path, struct stat *buf)
+{
+	int fd = open(path, O_RDONLY);
+	int ret = fstat(fd, buf);
+	close(fd);
+	return ret;
+}
+
+#endif /* __NR_stat */
diff --git a/usr/klibc/symlink.c b/usr/klibc/symlink.c
new file mode 100644
index 0000000..080394f
--- /dev/null
+++ b/usr/klibc/symlink.c
@@ -0,0 +1,12 @@
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+
+#ifndef __NR_symlink
+
+int symlink(const char *oldpath, const char *newpath)
+{
+	return symlinkat(oldpath, AT_FDCWD, newpath);
+}
+
+#endif /* __NR_symlink */
diff --git a/usr/klibc/unlink.c b/usr/klibc/unlink.c
new file mode 100644
index 0000000..6dfe66c
--- /dev/null
+++ b/usr/klibc/unlink.c
@@ -0,0 +1,12 @@
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+
+#ifndef __NR_unlink
+
+int unlink(const char *pathname)
+{
+	return unlinkat(AT_FDCWD, pathname, 0);
+}
+
+#endif  /* __NR_unlink */
diff --git a/usr/klibc/utimes.c b/usr/klibc/utimes.c
new file mode 100644
index 0000000..fd378a6
--- /dev/null
+++ b/usr/klibc/utimes.c
@@ -0,0 +1,20 @@
+#include <fcntl.h>
+#include <sys/time.h>
+#include <sys/stat.h>
+#include <sys/syscall.h>
+
+#ifndef __NR_utimes
+
+int utimes(const char *file, const struct timeval tvp[2])
+{
+	struct timespec ts[2];
+
+	if (tvp) {
+		ts->tv_sec = tvp->tv_sec;
+		ts->tv_nsec = tvp->tv_usec * 1000;
+	}
+
+	return utimensat(AT_FDCWD, file, &ts[0], 0);
+}
+
+#endif /* __NR_utimes */
-- 
1.8.1.4

Steve Capper

2013-Nov-08 17:12 UTC

head link

[klibc] [PATCH 3/3] arm64: Introduce arm64 support

Based on work by Neil Williams (codehelp at debian.org) and Anil Singhar
(anil.singhar at linaro.org), this patch introduces arm64 support.

Signed-off-by: Steve Capper <steve.capper at linaro.org>
---
 Makefile                                  |  3 +-
 usr/include/arch/arm64/klibc/archconfig.h | 17 ++++++++++
 usr/include/arch/arm64/klibc/archsetjmp.h | 20 ++++++++++++
 usr/include/arch/arm64/klibc/archsignal.h | 14 +++++++++
 usr/include/arch/arm64/klibc/archstat.h   | 29 +++++++++++++++++
 usr/include/arch/arm64/klibc/asmmacros.h  | 11 +++++++
 usr/klibc/README.klibc                    |  1 +
 usr/klibc/SYSCALLS.def                    |  8 ++---
 usr/klibc/arch/arm64/Kbuild               |  7 +++++
 usr/klibc/arch/arm64/MCONFIG              | 23 ++++++++++++++
 usr/klibc/arch/arm64/crt0.S               | 19 +++++++++++
 usr/klibc/arch/arm64/pipe.c               | 10 ++++++
 usr/klibc/arch/arm64/setjmp.S             | 52 +++++++++++++++++++++++++++++++
 usr/klibc/arch/arm64/syscall.S            | 25 +++++++++++++++
 usr/klibc/arch/arm64/sysstub.ph           | 25 +++++++++++++++
 usr/klibc/arch/arm64/vfork.S              | 34 ++++++++++++++++++++
 16 files changed, 293 insertions(+), 5 deletions(-)
 create mode 100644 usr/include/arch/arm64/klibc/archconfig.h
 create mode 100644 usr/include/arch/arm64/klibc/archsetjmp.h
 create mode 100644 usr/include/arch/arm64/klibc/archsignal.h
 create mode 100644 usr/include/arch/arm64/klibc/archstat.h
 create mode 100644 usr/include/arch/arm64/klibc/asmmacros.h
 create mode 100644 usr/klibc/arch/arm64/Kbuild
 create mode 100644 usr/klibc/arch/arm64/MCONFIG
 create mode 100644 usr/klibc/arch/arm64/crt0.S
 create mode 100644 usr/klibc/arch/arm64/pipe.c
 create mode 100644 usr/klibc/arch/arm64/setjmp.S
 create mode 100644 usr/klibc/arch/arm64/syscall.S
 create mode 100644 usr/klibc/arch/arm64/sysstub.ph
 create mode 100644 usr/klibc/arch/arm64/vfork.S

diff --git a/Makefile b/Makefile
index 0a3ee69..a7da622 100644
--- a/Makefile
+++ b/Makefile
@@ -30,7 +30,8 @@ export OBJDUMP  := $(KLIBCROSS)objdump
 
 NOSTDINC_FLAGS := -nostdlib -nostdinc -isystem $(shell $(CC)
-print-file-name=include)
 
-ARCH	          := $(shell uname -m | sed -e s/i.86/i386/ -e s/parisc64/parisc/
-e s/sun4u/sparc64/ -e s/arm.*/arm/ -e s/sa110/arm/ -e s/sh.*/sh/)
+ARCH	          := $(shell uname -m | sed -e s/i.86/i386/ -e s/parisc64/parisc/
-e s/sun4u/sparc64/ -e s/arm.*/arm/ -e s/sa110/arm/ \
+			-e s/aarch64.*/arm64/ -e s/sh.*/sh/)
 export KLIBCARCH  ?= $(ARCH)
 export KLIBCARCHDIR := $(shell echo $(KLIBCARCH) | sed -e s/s390x/s390/)
 
diff --git a/usr/include/arch/arm64/klibc/archconfig.h
b/usr/include/arch/arm64/klibc/archconfig.h
new file mode 100644
index 0000000..5e2004b
--- /dev/null
+++ b/usr/include/arch/arm64/klibc/archconfig.h
@@ -0,0 +1,17 @@
+/*
+ * include/arch/arm64/klibc/archconfig.h
+ *
+ * See include/klibc/sysconfig.h for the options that can be set in
+ * this file.
+ *
+ */
+
+#ifndef _KLIBC_ARCHCONFIG_H
+#define _KLIBC_ARCHCONFIG_H
+
+/* Use rt_* signals */
+#define _KLIBC_USE_RT_SIG 1
+#define _KLIBC_NO_MMU 0
+#define _KLIBC_REAL_VFORK 1
+
+#endif				/* _KLIBC_ARCHCONFIG_H */
diff --git a/usr/include/arch/arm64/klibc/archsetjmp.h
b/usr/include/arch/arm64/klibc/archsetjmp.h
new file mode 100644
index 0000000..1738617
--- /dev/null
+++ b/usr/include/arch/arm64/klibc/archsetjmp.h
@@ -0,0 +1,20 @@
+/*
+ * arch/arm64/include/klibc/archsetjmp.h
+ */
+
+#ifndef _KLIBC_ARCHSETJMP_H
+#define _KLIBC_ARCHSETJMP_H
+
+/*
+ * x19-x28 are callee saved, also save fp, lr, sp.
+ * d8-d15 are also callee saved.
+ */
+
+struct __jmp_buf {
+	uint64_t __gregs[13];
+	uint64_t __fpregs[8];
+};
+
+typedef struct __jmp_buf jmp_buf[1];
+
+#endif				/* _SETJMP_H */
diff --git a/usr/include/arch/arm64/klibc/archsignal.h
b/usr/include/arch/arm64/klibc/archsignal.h
new file mode 100644
index 0000000..94e6bc8
--- /dev/null
+++ b/usr/include/arch/arm64/klibc/archsignal.h
@@ -0,0 +1,14 @@
+/*
+ * arch/arm64/include/klibc/archsignal.h
+ *
+ * Architecture-specific signal definitions
+ *
+ */
+
+#ifndef _KLIBC_ARCHSIGNAL_H
+#define _KLIBC_ARCHSIGNAL_H
+
+#include <asm/signal.h>
+/* No special stuff for this architecture */
+
+#endif
diff --git a/usr/include/arch/arm64/klibc/archstat.h
b/usr/include/arch/arm64/klibc/archstat.h
new file mode 100644
index 0000000..a1a3e79
--- /dev/null
+++ b/usr/include/arch/arm64/klibc/archstat.h
@@ -0,0 +1,29 @@
+#ifndef _KLIBC_ARCHSTAT_H
+#define _KLIBC_ARCHSTAT_H
+
+#include <klibc/stathelp.h>
+
+struct stat {
+          unsigned long   st_dev;         /* Device.  */
+          unsigned long   st_ino;         /* File serial number.  */
+          unsigned int    st_mode;        /* File mode.  */
+          unsigned int    st_nlink;       /* Link count.  */
+          unsigned int    st_uid;         /* User ID of the file's owner. 
*/
+          unsigned int    st_gid;         /* Group ID of the file's group.
*/
+          unsigned long   st_rdev;        /* Device number, if device.  */
+          unsigned long   __pad1;
+          long            st_size;        /* Size of file, in bytes.  */
+          int             st_blksize;     /* Optimal block size for I/O.  */
+          int             __pad2;
+          long            st_blocks;      /* Number 512-byte blocks allocated.
*/
+          long            st_atime;       /* Time of last access.  */
+          unsigned long   st_atime_nsec;
+          long            st_mtime;       /* Time of last modification.  */
+          unsigned long   st_mtime_nsec;
+          long            st_ctime;       /* Time of last status change.  */
+          unsigned long   st_ctime_nsec;
+          unsigned int    __unused4;
+          unsigned int    __unused5;
+  };
+
+#endif
diff --git a/usr/include/arch/arm64/klibc/asmmacros.h
b/usr/include/arch/arm64/klibc/asmmacros.h
new file mode 100644
index 0000000..c298f66
--- /dev/null
+++ b/usr/include/arch/arm64/klibc/asmmacros.h
@@ -0,0 +1,11 @@
+/*
+ * usr/include/arch/arm64/klibc/asmmacros.h
+ *
+ * Assembly macros used by arm64 system call stubs
+ */
+
+#ifndef _KLIBC_ASMMACROS_H
+#define _KLIBC_ASMMACROS_H
+
+
+#endif /* _KLIBC_ASMMACROS_H */
diff --git a/usr/klibc/README.klibc b/usr/klibc/README.klibc
index 7de5fea..c72ae47 100644
--- a/usr/klibc/README.klibc
+++ b/usr/klibc/README.klibc
@@ -36,6 +36,7 @@ b) If you're cross-compiling, you need to set KLIBCARCH to
the
    arm-thumb:	 Untested
    arm:		 Working
    arm26:	 Not yet ported
+   arm64:	 Working
    avr32:	 Not yet ported
    cris:	 Working
    h8300:	 Not yet ported
diff --git a/usr/klibc/SYSCALLS.def b/usr/klibc/SYSCALLS.def
index c2f36e7..c1f5b70 100644
--- a/usr/klibc/SYSCALLS.def
+++ b/usr/klibc/SYSCALLS.def
@@ -21,7 +21,7 @@ void _exit,exit::_exit(int);
 <?!ia64> pid_t clone::__clone(unsigned long, void *);
 <?ia64> pid_t clone::__clone2(unsigned long, void *, void *);
 # if ! _KLIBC_NO_MMU
-<!sparc,sparc64,ia64> pid_t fork();
+<!sparc,sparc64,ia64,arm64> pid_t fork();
 <sparc,sparc64> pid_t fork at forkish();
 #endif
 #if _KLIBC_REAL_VFORK
@@ -124,7 +124,7 @@ int fchmod(int, mode_t);
 <?> int mkdir(const char *, mode_t);
 <?> int mkdirat(int, const char *, mode_t);
 <?> int rmdir(const char *);
-<!alpha,ia64,mips,mips64,sh,sparc,sparc64> int pipe(int *);
+<!alpha,arm64,ia64,mips,mips64,sh,sparc,sparc64> int pipe(int *);
 int pipe2(int *, int);
 mode_t umask(mode_t);
 int chroot(const char *);
@@ -132,8 +132,8 @@ int chroot(const char *);
 <?> int symlinkat(const char *, int, const char *);
 <?> int readlink(const char *, char *, size_t);
 <?> int readlinkat(int, const char *, char *, int);
-<!ppc64> int stat64,stat::stat(const char *, struct stat *);
-<!ppc64> int lstat64,lstat::lstat(const char *, struct stat *);
+<!arm64,ppc64> int stat64,stat::stat(const char *, struct stat *);
+<!arm64,ppc64> int lstat64,lstat::lstat(const char *, struct stat *);
 <!ppc64> int fstat64,fstat::fstat(int, struct stat *);
 <ppc64> int stat::stat(const char *, struct stat *);
 <ppc64> int lstat::lstat(const char *, struct stat *);
diff --git a/usr/klibc/arch/arm64/Kbuild b/usr/klibc/arch/arm64/Kbuild
new file mode 100644
index 0000000..c23bd69
--- /dev/null
+++ b/usr/klibc/arch/arm64/Kbuild
@@ -0,0 +1,7 @@
+
+# klibc files for arm64
+#
+
+klib-y := setjmp.o syscall.o vfork.o pipe.o
+always  := crt0.o
+targets := crt0.o
diff --git a/usr/klibc/arch/arm64/MCONFIG b/usr/klibc/arch/arm64/MCONFIG
new file mode 100644
index 0000000..dfebc5e
--- /dev/null
+++ b/usr/klibc/arch/arm64/MCONFIG
@@ -0,0 +1,23 @@
+# -*- makefile -*-
+#
+# arch/arm64/MCONFIG
+#
+# Special rules for this architecture.  Note that this is actually
+# included from the main Makefile, and that pathnames should be
+# accordingly.
+#
+
+CPU_ARCH ?= armv8-a
+CPU_TUNE ?= generic
+
+KLIBCOPTFLAGS += -g -Os -march=$(CPU_ARCH) -mtune=$(CPU_TUNE)
+KLIBCBITSIZE  = 64
+KLIBCREQFLAGS += -fno-exceptions
+
+# Extra linkflags when building the shared version of the library
+# This address needs to be reachable using normal inter-module
+# calls, and work on the memory models for this architecture
+
+# On arm64, binaries are normally loaded at 4MB. Place klibc.so
+# a little before that at 2MB to prevent overlap.
+KLIBCSHAREDFLAGS = -Ttext 0x0200000
diff --git a/usr/klibc/arch/arm64/crt0.S b/usr/klibc/arch/arm64/crt0.S
new file mode 100644
index 0000000..0b2dd32
--- /dev/null
+++ b/usr/klibc/arch/arm64/crt0.S
@@ -0,0 +1,19 @@
+#
+# arch/arm64/crt0.S
+#
+# void _start(void)
+# {
+#    __libc_init(elf_structure, atexit_ptr);
+# }
+#
+
+	.text
+	.balign 8
+	.type _start,#function
+	.globl _start
+
+_start:
+	mov	x0, sp
+	mov	x1, #0
+	bl	__libc_init
+	.size _start,.-_start
diff --git a/usr/klibc/arch/arm64/pipe.c b/usr/klibc/arch/arm64/pipe.c
new file mode 100644
index 0000000..f10a69e
--- /dev/null
+++ b/usr/klibc/arch/arm64/pipe.c
@@ -0,0 +1,10 @@
+#include <unistd.h>
+
+#ifndef __NR_pipe
+
+int pipe(int pipefd[2])
+{
+	return pipe2(pipefd, 0);
+}
+
+#endif  /* __NR_pipe */
diff --git a/usr/klibc/arch/arm64/setjmp.S b/usr/klibc/arch/arm64/setjmp.S
new file mode 100644
index 0000000..3d5c1c6
--- /dev/null
+++ b/usr/klibc/arch/arm64/setjmp.S
@@ -0,0 +1,52 @@
+#
+# arch/arm64/setjmp.S
+#
+# setjmp/longjmp for arm64
+#
+
+#include <klibc/asmmacros.h>
+
+	.text
+	.balign 8
+	.globl setjmp
+	.type setjmp, #function
+setjmp:
+	mov	x1, sp
+	stp	x19, x20, [x0, #0]
+	stp	x21, x22, [x0, #16]
+	stp	x23, x24, [x0, #32]
+	stp	x25, x26, [x0, #48]
+	stp	x27, x28, [x0, #64]
+	stp	x29, x30, [x0, #80]
+	str	x1,       [x0, #96]
+	stp	d8, d9,   [x0, #104]
+	stp	d10, d11, [x0, #120]
+	stp	d12, d13, [x0, #136]
+	stp	d14, d15, [x0, #152]
+	mov	x0, #0 			/* set the return value of setjmp */
+	br	x30
+	.size setjmp,.-setjmp
+
+	.text
+	.balign 8
+	.globl longjmp
+	.type longjmp, #function
+longjmp:
+	ldp	x19, x20, [x0, #0]
+	ldp	x21, x22, [x0, #16]
+	ldp	x23, x24, [x0, #32]
+	ldp	x25, x26, [x0, #48]
+	ldp	x27, x28, [x0, #64]
+	ldp	x29, x30, [x0, #80]
+	ldr	x2,	  [x0, #96]
+	ldp	d8, d9,   [x0, #104]
+	ldp	d10, d11, [x0, #120]
+	ldp	d12, d13, [x0, #136]
+	ldp	d14, d15, [x0, #152]
+	mov	sp, x2
+	mov	x0, x1
+	cbnz	x1, 1f
+	mov	x0, #1
+1:
+	br	x30
+	.size longjmp,.-longjmp
diff --git a/usr/klibc/arch/arm64/syscall.S b/usr/klibc/arch/arm64/syscall.S
new file mode 100644
index 0000000..3ce91fb
--- /dev/null
+++ b/usr/klibc/arch/arm64/syscall.S
@@ -0,0 +1,25 @@
+/*
+ * arch/arm64/syscall.S
+ *
+ * System call common handling - if the return
+ * value from the system call is negative, then
+ * extract the magnitude and return it as errno and
+ * return -1, if the return value is 0 that is
+ * success case.
+ */
+
+	.type	__syscall_common,#function
+	.globl  __syscall_common
+	.balign 8
+
+__syscall_common:
+	cmp	x0, #0x0
+	b.ge	2f
+	neg	x0, x0
+	ldr	x8, 1f
+	str	x0, [x8]
+	mov	x0, #-1
+2:
+	ret
+1:
+	.dword	errno
diff --git a/usr/klibc/arch/arm64/sysstub.ph b/usr/klibc/arch/arm64/sysstub.ph
new file mode 100644
index 0000000..47cbfd9
--- /dev/null
+++ b/usr/klibc/arch/arm64/sysstub.ph
@@ -0,0 +1,25 @@
+# -*- perl -*-
+#
+# arch/arm64/sysstub.ph
+#
+# Script to generate system call stubs
+#
+
+sub make_sysstub($$$$$@) {
+    my($outputdir, $fname, $type, $sname, $stype, @args) = @_;
+
+    open(OUT, '>', "${outputdir}/${fname}.S");
+    print  OUT "#include <asm/unistd.h>\n";
+    print  OUT "#include <klibc/asmmacros.h>\n";
+    print  OUT "	.text\n";
+    print  OUT "	.type	${fname}, #function\n";
+    print  OUT "	.globl	${fname}\n";
+    print  OUT "	.balign	8\n";
+    print  OUT "${fname}:\n";
+    print  OUT "	mov w8,__NR_${sname}\n";
+    print  OUT "	svc	0\n";
+    print  OUT "	b	__syscall_common\n";
+    print  OUT "	.size	${fname},.-${fname}\n";
+}
+
+1;
diff --git a/usr/klibc/arch/arm64/vfork.S b/usr/klibc/arch/arm64/vfork.S
new file mode 100644
index 0000000..494326c
--- /dev/null
+++ b/usr/klibc/arch/arm64/vfork.S
@@ -0,0 +1,34 @@
+/*
+ * arch/arm64/vfork.S
+ *
+ * vfork - a system call which must not use the stack.
+ */
+
+#include <klibc/asmmacros.h>
+#include <asm/unistd.h>
+
+	.type	vfork,#function
+	.globl	vfork
+	.balign	8
+
+vfork:
+	/* Prepare for the system call */
+        /* 1. Push the function pointer and argument location
+              on to the child process stack */
+        /* 2. Gather the Flags */
+        /* New sp is already in x1.  */
+        mov     x0, #0x4111     /* CLONE_VM | CLONE_VFORK | SIGCHLD */
+        mov     x1, sp
+        mov     w8,__NR_clone
+        svc     0
+        cmp     x0, #0x0
+        b.ge    2f
+        neg     x0, x0
+        ldr     x8, 1f
+        str     x0, [x8]
+        mov     x0, #-1
+2:
+        ret
+1:
+        .dword   errno
+        .size   vfork,.-vfork
-- 
1.8.1.4

H. Peter Anvin

2013-Nov-08 17:24 UTC

head link

[klibc] [PATCH 3/3] arm64: Introduce arm64 support

On 11/08/2013 09:12 AM, Steve Capper wrote:> +
> +/*
> + * x19-x28 are callee saved, also save fp, lr, sp.
> + * d8-d15 are also callee saved.
> + */
> +
> +struct __jmp_buf {
> +	uint64_t __gregs[13];
> +	uint64_t __fpregs[8];
> +};
> +
Since the index of these arrays have no connection with what is stored
in them, they should be named fields in the structure, not an array.

Do we need the fpregs saved even though klibc doesn't do fp?
> diff --git a/usr/klibc/arch/arm64/pipe.c b/usr/klibc/arch/arm64/pipe.c
> new file mode 100644
> index 0000000..f10a69e
> --- /dev/null
> +++ b/usr/klibc/arch/arm64/pipe.c
> @@ -0,0 +1,10 @@
> +#include <unistd.h>
> +
> +#ifndef __NR_pipe
> +
> +int pipe(int pipefd[2])
> +{
> +	return pipe2(pipefd, 0);
> +}
> +
> +#endif  /* __NR_pipe */
This is a generic routine, right?  It should be part of the generic
ersatz functions, no?

	-hpa

maximilian attems

2013-Nov-08 18:35 UTC

head link

[klibc] [PATCH 0/3] Introduce arm64 support

On Fri, Nov 08, 2013 at 05:12:13PM +0000, Steve Capper
wrote:> 
> I've rebased the work from Neil Williams and Anil Singhar into the
> following three patches. Most of the code changes are due to new
> syscall implementations being needed for arm64 as a only a minimal set
> of syscalls are defined in the arm64 kernel.
Why did their Signed-off get missing?

H. Peter Anvin

2013-Nov-08 19:32 UTC

head link

[klibc] [PATCH 0/3] Introduce arm64 support

On 11/08/2013 10:35 AM, maximilian attems wrote:> On Fri, Nov 08, 2013 at 05:12:13PM +0000, Steve Capper wrote:
>>
>> I've rebased the work from Neil Williams and Anil Singhar into the
>> following three patches. Most of the code changes are due to new
>> syscall implementations being needed for arm64 as a only a minimal set
>> of syscalls are defined in the arm64 kernel.
> 
> Why did their Signed-off get missing?
> 
Presumably because they got reworked substantially.  It is a hard case;
I often use an Originally-by: tag for that if the rework is substantial
enough that I feel that leaving the original Author tag is actively
misleading.

	-hpa

H. Peter Anvin

2013-Nov-08 19:34 UTC

head link

[klibc] [PATCH 3/3] arm64: Introduce arm64 support

On 11/08/2013 09:12 AM, Steve Capper wrote:> -<!ppc64> int stat64,stat::stat(const char *, struct stat *);
> -<!ppc64> int lstat64,lstat::lstat(const char *, struct stat *);
> +<!arm64,ppc64> int stat64,stat::stat(const char *, struct stat *);
> +<!arm64,ppc64> int lstat64,lstat::lstat(const char *, struct stat
*);
This should have been part of the previous patch but using <?!ppc64>.

	-hpa

H. Peter Anvin

2013-Nov-08 19:37 UTC

head link

[klibc] [PATCH 2/3] syscalls: Add syscalls needed by arm64

On 11/08/2013 09:12 AM, Steve Capper wrote:> diff --git a/usr/klibc/lstat.c b/usr/klibc/lstat.c
> new file mode 100644
> index 0000000..0282eec
> --- /dev/null
> +++ b/usr/klibc/lstat.c
> @@ -0,0 +1,17 @@
> +#include <fcntl.h>
> +#include <unistd.h>
> +#include <sys/types.h>
> +#include <sys/stat.h>
> +#include <sys/syscall.h>
> +
> +#ifndef __NR_lstat
> +
> +int lstat(const char *path, struct stat *buf)
> +{
> +	int fd = open(path, O_RDONLY | O_PATH | O_NOFOLLOW);
> +	int ret = fstat(fd, buf);
> +	close(fd);
> +	return ret;
> +}
> +
> +#endif  /* __NR_lstat  */
  [...]
> diff --git a/usr/klibc/stat.c b/usr/klibc/stat.c
> new file mode 100644
> index 0000000..92343f1
> --- /dev/null
> +++ b/usr/klibc/stat.c
> @@ -0,0 +1,17 @@
> +#include <fcntl.h>
> +#include <unistd.h>
> +#include <sys/types.h>
> +#include <sys/stat.h>
> +#include <sys/syscall.h>
> +
> +#ifndef __NR_stat
> +
> +int stat(const char *path, struct stat *buf)
> +{
> +	int fd = open(path, O_RDONLY);
> +	int ret = fstat(fd, buf);
> +	close(fd);
> +	return ret;
> +}
> +
> +#endif /* __NR_stat */
No.  Just... no.  Especially not O_RDONLY without O_PATH.

But do an implementation based on fstatat() instead.

	-hpa

H. Peter Anvin

2013-Nov-08 19:46 UTC

head link

[klibc] [PATCH 2/3] syscalls: Add syscalls needed by arm64

On 11/08/2013 09:12 AM, Steve Capper wrote:> diff --git a/usr/klibc/open64.c b/usr/klibc/open64.c
> new file mode 100644
> index 0000000..6ca603e
> --- /dev/null
> +++ b/usr/klibc/open64.c
> @@ -0,0 +1,22 @@
> +/*
> + * open64.c
> + *
> + * For 64 bit systems without the open syscall, pass straight
> + * through into openat.
> + */
> +
> +#define _KLIBC_IN_OPEN_C
> +#include <unistd.h>
> +#include <fcntl.h>
> +#include <sys/syscall.h>
> +
> +#if !defined(__NR_open) && _BITSIZE == 64
> +
> +__extern int openat(int, const char *, int, ...);
> +
> +int open(const char *pathname, int flags, mode_t mode)
> +{
> +	return openat(AT_FDCWD, pathname, flags, mode);
> +}
> +
> +#endif
This applies equally to a 32-bit platform that doesn't define __NR_open,
except there we need to add O_LARGEFILE to the flags and call __openat
in order to not have to pull in openat.c as well.

I suggest merging this into open.c and making it look something like:

#ifndef __NR_open

# if __BITSIZE == 32

extern int __openat(int, const char *, int, mode_t);

int open(const char *pathname, int flags, mode_t mode)
{
	return __openat(AT_FDCWD, pathname, flags | O_LARGEFILE, mode);
}

# else

extern int openat(int, const char *, int, ...);

int open(const char *pathname, int flags, mode_t mode)
{
	return openat(AT_FDCWD, pathname, flags, mode);
}

# endif

#elif _BITSIZE == 32 && !defined(__i386__) && !defined(__m68k__)

... the rest of the current file ...

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