generic-library/bionic
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
94a34010c1
bionic/libc/arch-arm/syscalls/ftruncate64.S

14 lines
285 B
ArmAsm
Raw Normal View History

libc: Add ftruncate64 and improve 64-bit parameter syscall handling. This patch improves the handling of 64-bit parameters in syscalls on ARM. The ARM EABI mandates that 64-bit quantities be passed in even/odd register pairs, which requires special treatment. This allows us to simplify our implementations of pread() and pwrite() and remove the C stubs for pread64() and pwrite64(). Also add ftruncate64() to <unistd.h> Change-Id: I407e2fd223ba0093dd2d0b04c6152fadfc9ce3ef Bug 3107933
2010-12-16 16:47:14 +01:00
/* autogenerated by gensyscalls.py */
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 19:47:44 +01:00
#include <machine/asm.h>
libc: Add ftruncate64 and improve 64-bit parameter syscall handling. This patch improves the handling of 64-bit parameters in syscalls on ARM. The ARM EABI mandates that 64-bit quantities be passed in even/odd register pairs, which requires special treatment. This allows us to simplify our implementations of pread() and pwrite() and remove the C stubs for pread64() and pwrite64(). Also add ftruncate64() to <unistd.h> Change-Id: I407e2fd223ba0093dd2d0b04c6152fadfc9ce3ef Bug 3107933
2010-12-16 16:47:14 +01:00
#include <sys/linux-syscalls.h>
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 19:47:44 +01:00
ENTRY(ftruncate64)
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 14:02:50 +01:00
mov ip, r7
libc: Add ftruncate64 and improve 64-bit parameter syscall handling. This patch improves the handling of 64-bit parameters in syscalls on ARM. The ARM EABI mandates that 64-bit quantities be passed in even/odd register pairs, which requires special treatment. This allows us to simplify our implementations of pread() and pwrite() and remove the C stubs for pread64() and pwrite64(). Also add ftruncate64() to <unistd.h> Change-Id: I407e2fd223ba0093dd2d0b04c6152fadfc9ce3ef Bug 3107933
2010-12-16 16:47:14 +01:00
ldr r7, =__NR_ftruncate64
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 14:02:50 +01:00
mov r7, ip
libc: Add ftruncate64 and improve 64-bit parameter syscall handling. This patch improves the handling of 64-bit parameters in syscalls on ARM. The ARM EABI mandates that 64-bit quantities be passed in even/odd register pairs, which requires special treatment. This allows us to simplify our implementations of pread() and pwrite() and remove the C stubs for pread64() and pwrite64(). Also add ftruncate64() to <unistd.h> Change-Id: I407e2fd223ba0093dd2d0b04c6152fadfc9ce3ef Bug 3107933
2010-12-16 16:47:14 +01:00
movs r0, r0
bxpl lr
b __set_syscall_errno
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 19:47:44 +01:00
END(ftruncate64)
Reference in New Issue Copy Permalink