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bionic/libc/arch-arm/syscalls/linkat.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 23:27:59 +02:00
/* 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 19:31:05 +01:00
#include <private/bionic_asm.h>
auto import from //depot/cupcake/@135843
2009-03-04 04:28:35 +01:00
Move away from the __ARCH_WANT_SYSCALL_NO_AT system calls. Modern architectures only get the *at(2) system calls. For example, aarch64 doesn't have open(2), and expects userspace to use openat(2) instead. Change-Id: I87b4ed79790cb8a80844f5544ac1a13fda26c7b5
2013-10-22 22:28:46 +02:00
ENTRY(linkat)
mov ip, sp
stmfd sp!, {r4, r5, r6, r7}
Add cfi directives to all arm assembly. Since the ENTRY/END macros now have .cfi_startproc/.cfi_endproc, most of the custom arm assembly has no unwind information. Adding the proper cfi directives for these and removing the arm directives. Update the gensyscalls.py script to add these cfi directives for the generated assembly. Also fix the references to non-uapi headers to the proper uapi header. In addition, remove the kill.S, tkill.S, tgkill.S for arm since they are not needed at all. The unwinder (libunwind) is able to properly unwind using the normal abort. After this change, I can unwind through the system calls again. Bug: 11559337 Bug: 11825869 Bug: 11321283 Change-Id: I18b48089ef2d000a67913ce6febc6544bbe934a3
2013-12-03 02:44:53 +01:00
.cfi_def_cfa_offset 16
.cfi_rel_offset r4, 0
.cfi_rel_offset r5, 4
.cfi_rel_offset r6, 8
.cfi_rel_offset r7, 12
Move away from the __ARCH_WANT_SYSCALL_NO_AT system calls. Modern architectures only get the *at(2) system calls. For example, aarch64 doesn't have open(2), and expects userspace to use openat(2) instead. Change-Id: I87b4ed79790cb8a80844f5544ac1a13fda26c7b5
2013-10-22 22:28:46 +02:00
ldmfd ip, {r4, r5, r6}
ldr r7, =__NR_linkat
auto import from //depot/cupcake/@135843
2009-03-04 04:28:35 +01:00
swi #0
Move away from the __ARCH_WANT_SYSCALL_NO_AT system calls. Modern architectures only get the *at(2) system calls. For example, aarch64 doesn't have open(2), and expects userspace to use openat(2) instead. Change-Id: I87b4ed79790cb8a80844f5544ac1a13fda26c7b5
2013-10-22 22:28:46 +02:00
ldmfd sp!, {r4, r5, r6, r7}
Add cfi directives to all arm assembly. Since the ENTRY/END macros now have .cfi_startproc/.cfi_endproc, most of the custom arm assembly has no unwind information. Adding the proper cfi directives for these and removing the arm directives. Update the gensyscalls.py script to add these cfi directives for the generated assembly. Also fix the references to non-uapi headers to the proper uapi header. In addition, remove the kill.S, tkill.S, tgkill.S for arm since they are not needed at all. The unwinder (libunwind) is able to properly unwind using the normal abort. After this change, I can unwind through the system calls again. Bug: 11559337 Bug: 11825869 Bug: 11321283 Change-Id: I18b48089ef2d000a67913ce6febc6544bbe934a3
2013-12-03 02:44:53 +01:00
.cfi_def_cfa_offset 0
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 22:57:30 +01:00
cmn r0, #(MAX_ERRNO + 1)
bxls lr
neg r0, r0
b __set_errno
Move away from the __ARCH_WANT_SYSCALL_NO_AT system calls. Modern architectures only get the *at(2) system calls. For example, aarch64 doesn't have open(2), and expects userspace to use openat(2) instead. Change-Id: I87b4ed79790cb8a80844f5544ac1a13fda26c7b5
2013-10-22 22:28:46 +02:00
END(linkat)
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