path: root/src/setjmp
diff options
authorRich Felker <>2011-09-18 16:44:54 -0400
committerRich Felker <>2011-09-18 16:44:54 -0400
commitd960d4f2cbf18ff3476c7ac03698ec253885dd8e (patch)
treec7570054ccddf4febc86c046a0b90b3021d1a457 /src/setjmp
parent4f4bf0ad2e8c729de92db06318b9614ab2cdcc5c (diff)
initial commit of the arm port
this port assumes eabi calling conventions, eabi linux syscall convention, and presence of the kernel helpers at 0xffff0f?0 needed for threads support. otherwise it makes very few assumptions, and the code should work even on armv4 without thumb support, as well as on systems with thumb interworking. the bits headers declare this a little endian system, but as far as i can tell the code should work equally well on big endian. some small details are probably broken; so far, testing has been limited to qemu/aboriginal linux.
Diffstat (limited to 'src/setjmp')
2 files changed, 32 insertions, 0 deletions
diff --git a/src/setjmp/arm/longjmp.s b/src/setjmp/arm/longjmp.s
new file mode 100644
index 00000000..037cb3d3
--- /dev/null
+++ b/src/setjmp/arm/longjmp.s
@@ -0,0 +1,15 @@ _longjmp longjmp
+.type _longjmp,%function
+.type longjmp,%function
+ mov ip,r0
+ movs r0,r1
+ moveq r0,#1
+ ldmia ip!, {v1,v2,v3,v4,v5,v6,sl,fp}
+ ldr sp,[ip],#4
+ ldr lr,[ip],#4
+ tst lr,#1
+ moveq pc,lr
+ bx lr
diff --git a/src/setjmp/arm/setjmp.s b/src/setjmp/arm/setjmp.s
new file mode 100644
index 00000000..41e02d82
--- /dev/null
+++ b/src/setjmp/arm/setjmp.s
@@ -0,0 +1,17 @@ __setjmp _setjmp setjmp
+.type __setjmp,%function
+.type _setjmp,%function
+.type setjmp,%function
+ mov ip,r0
+ stmia ip!,{v1,v2,v3,v4,v5,v6,sl,fp}
+ mov r2,sp
+ stmia ip!,{r2,lr}
+ mov r0,#0
+ tst lr,#1
+ moveq pc,lr
+ bx lr