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android_bionic/libc/arch-arm/syscalls/___fgetxattr.S

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Sort the syscalls.mk files, give all generated files the same header. No non-comment changes to the .S files. Change-Id: Iafcfd004c3ea92b64268f80ab16df615b97cefac
2013-10-16 21:27:59 +00:00
/* Generated by gensyscalls.py. Do not edit. */
Stop using the non-uapi <linux/err.h> header file. We only need it for MAX_ERRNO, and it's time we had somewhere to put the little assembler utility macros we've been putting off writing. Change-Id: I9354d2e0dc47c689296a34b5b229fc9ba75f1a83
2013-11-07 18:31:05 +00:00
#include <private/bionic_asm.h>
Add extended attribute (xattr) system call wrappers to bionic. The xattr system calls are required for the SE Android userspace in order to get and set file security contexts. In particular, libselinux requires these calls. Change-Id: I78f5eb3d8f3384aed0a5e7c6a6f001781d982017
2012-01-13 12:45:16 +00:00
libc: Add O_PATH support for fgetxattr / fsetxattr Support O_PATH file descriptors when handling fgetxattr and fsetxattr. This avoids requiring file read access to pull extended attributes. This is needed to support O_PATH file descriptors when calling SELinux's fgetfilecon() call. In particular, this allows the querying and setting of SELinux file context by using something like the following code: int dirfd = open("/path/to/dir", O_DIRECTORY); int fd = openat(dirfd, "file", O_PATH | O_NOFOLLOW); char *context; fgetfilecon(fd, &context); This change was motivated by a comment in https://android-review.googlesource.com/#/c/152680/1/toys/posix/ls.c Change-Id: Ic0cdf9f9dd0e35a63b44a4c4a08400020041eddf
2015-05-31 20:43:13 +00:00
ENTRY(___fgetxattr)
arm syscall : for eabi call_default don't use stack In the default case, we don't need to use the stack, we can save r7 with ip register (that what does eglibc). This allow to fix vfork data corruption (see 3884bfe9661955543ce203c60f9225bbdf33f6bb), because vfork now don't use the stack.
2013-01-16 13:02:50 +00:00
mov ip, r7
Add extended attribute (xattr) system call wrappers to bionic. The xattr system calls are required for the SE Android userspace in order to get and set file security contexts. In particular, libselinux requires these calls. Change-Id: I78f5eb3d8f3384aed0a5e7c6a6f001781d982017
2012-01-13 12:45:16 +00:00
ldr r7, =__NR_fgetxattr
swi #0
arm syscall : for eabi call_default don't use stack In the default case, we don't need to use the stack, we can save r7 with ip register (that what does eglibc). This allow to fix vfork data corruption (see 3884bfe9661955543ce203c60f9225bbdf33f6bb), because vfork now don't use the stack.
2013-01-16 13:02:50 +00:00
mov r7, ip
Use the kernel's MAX_ERRNO in the syscall stubs. Bug: http://code.google.com/p/android/issues/detail?id=53104 Change-Id: Iaabf7025b153e96dc5eca231a33a32d4cb7d8116
2013-03-12 21:57:30 +00:00
cmn r0, #(MAX_ERRNO + 1)
bxls lr
neg r0, r0
Ensure __set_errno is still visible on LP32. The use of the .hidden directive to avoid going via the PLT for __set_errno had the side-effect of actually making __set_errno hidden (which is odd because assembler directives don't usually affect symbols defined in a different file --- you can't even create a weak reference to a symbol that's defined in a different file). This change switches the system call stubs over to a new always-hidden __set_errno_internal and has a visible __set_errno on LP32 just for binary compatibility with old NDK apps. (cherry-pick of 7efad83d430f4d824f2aaa75edea5106f6ff8aae.) Bug: 17423135 Change-Id: I6b6d7a05dda85f923d22e5ffd169a91e23499b7b
2014-09-08 22:25:01 +00:00
b __set_errno_internal
libc: Add O_PATH support for fgetxattr / fsetxattr Support O_PATH file descriptors when handling fgetxattr and fsetxattr. This avoids requiring file read access to pull extended attributes. This is needed to support O_PATH file descriptors when calling SELinux's fgetfilecon() call. In particular, this allows the querying and setting of SELinux file context by using something like the following code: int dirfd = open("/path/to/dir", O_DIRECTORY); int fd = openat(dirfd, "file", O_PATH | O_NOFOLLOW); char *context; fgetfilecon(fd, &context); This change was motivated by a comment in https://android-review.googlesource.com/#/c/152680/1/toys/posix/ls.c Change-Id: Ic0cdf9f9dd0e35a63b44a4c4a08400020041eddf
2015-05-31 20:43:13 +00:00
END(___fgetxattr)
.hidden ___fgetxattr