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ARM: Allow building __longjmp as Thumb.

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Convert __longjmp code to allow building as Thumb.

ports/ChangeLog.arm:

2013-10-04  Will Newton  <will.newton@linaro.org>

	* sysdeps/arm/__longjmp.S (NO_THUMB): Remove define.
	(__longjmp): Use Thumb supported instructions.
	* sysdeps/unix/sysv/linux/arm/____longjmp_chk.S (NO_THUMB):
	Remove define.
This commit is contained in:
Will Newton 2013-09-25 10:14:20 +01:00
parent 66a9be9d58
commit 6d9b9a67af
3 changed files with 10 additions and 5 deletions
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7
ports/ChangeLog.arm
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@ -1,3 +1,10 @@
2013-10-04 Will Newton <will.newton@linaro.org>
* sysdeps/arm/__longjmp.S (NO_THUMB): Remove define.
(__longjmp): Use Thumb supported instructions.
* sysdeps/unix/sysv/linux/arm/____longjmp_chk.S (NO_THUMB):
Remove define.
2013-10-03 Will Newton <will.newton@linaro.org> 2013-10-03 Will Newton <will.newton@linaro.org>
* sysdeps/arm/__longjmp.S (__longjmp): Demangle fp, sp * sysdeps/arm/__longjmp.S (__longjmp): Demangle fp, sp

6
ports/sysdeps/arm/__longjmp.S
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@ -16,8 +16,6 @@
License along with the GNU C Library. If not, see License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */ <http://www.gnu.org/licenses/>. */
/* ??? Needs more rearrangement for the LDM to handle thumb mode. */
#define NO_THUMB
#include <sysdep.h> #include <sysdep.h>
#include <bits/setjmp.h> #include <bits/setjmp.h>
#include <rtld-global-offsets.h> #include <rtld-global-offsets.h>
@ -28,6 +26,7 @@
ENTRY (__longjmp) ENTRY (__longjmp)
mov ip, r0 mov ip, r0
movs r0, r1 /* get the return value in place */ movs r0, r1 /* get the return value in place */
it eq
moveq r0, #1 /* can't let setjmp() return zero! */ moveq r0, #1 /* can't let setjmp() return zero! */
#ifdef CHECK_SP #ifdef CHECK_SP
@ -44,7 +43,8 @@ ENTRY (__longjmp)
#ifdef PTR_DEMANGLE #ifdef PTR_DEMANGLE
PTR_DEMANGLE (fp, a4, a3, a2) PTR_DEMANGLE (fp, a4, a3, a2)
ldr a4, [ip], #4 ldr a4, [ip], #4
PTR_DEMANGLE2 (sp, a4, a3) PTR_DEMANGLE2 (a4, a4, a3)
mov sp, a4
ldr a4, [ip], #4 ldr a4, [ip], #4
PTR_DEMANGLE2 (lr, a4, a3) PTR_DEMANGLE2 (lr, a4, a3)
#else #else

2
ports/sysdeps/unix/sysv/linux/arm/____longjmp_chk.S
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@ -15,8 +15,6 @@
License along with the GNU C Library. If not, see License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */ <http://www.gnu.org/licenses/>. */
/* ??? Needs more rearrangement for the LDM to handle thumb mode. */
#define NO_THUMB
#include <sysdep.h> #include <sysdep.h>
.section .rodata.str1.1,"aMS",%progbits,1 .section .rodata.str1.1,"aMS",%progbits,1