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

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ArmAsm
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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>
auto import from //depot/cupcake/@135843
2009-03-04 03:28:35 +00:00
libc: ARM: update syscalls with new script Used the new gensyscalls.py script to update the ARM syscalls with the BEGIN(x) and END(x) macros to give size information for the code of the syscall. Useful for valgrind. Change-Id: I8c481c8928401ac110fd19b087f7d67e4db39326
2011-02-17 18:47:44 +00:00
ENTRY(unlinkat)
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 unwind information for r7 in arm syscalls. It turns out that clang can emit code where the sp is saved in the r7 register on arm. Unfortunately, a lot of our syscalls overwrite that value while the syscall is executing, so unwinding through that syscall fails. Update the syscall generation code to add unwinding information for these uses. Bug: 28411713 Change-Id: Id51a5d43c058631bb50834527f93fa299bbcf759
2016-04-28 01:31:02 +00:00
.cfi_register r7, ip
auto import from //depot/cupcake/@135843
2009-03-04 03:28:35 +00:00
ldr r7, =__NR_unlinkat
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
Add unwind information for r7 in arm syscalls. It turns out that clang can emit code where the sp is saved in the r7 register on arm. Unfortunately, a lot of our syscalls overwrite that value while the syscall is executing, so unwinding through that syscall fails. Update the syscall generation code to add unwinding information for these uses. Bug: 28411713 Change-Id: Id51a5d43c058631bb50834527f93fa299bbcf759
2016-04-28 01:31:02 +00:00
.cfi_restore r7
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. Bug: 17423135 Change-Id: I6b6d7a05dda85f923d22e5ffd169a91e23499b7b
2014-09-08 22:25:01 +00:00
b __set_errno_internal
libc: ARM: update syscalls with new script Used the new gensyscalls.py script to update the ARM syscalls with the BEGIN(x) and END(x) macros to give size information for the code of the syscall. Useful for valgrind. Change-Id: I8c481c8928401ac110fd19b087f7d67e4db39326
2011-02-17 18:47:44 +00:00
END(unlinkat)