From d960d4f2cbf18ff3476c7ac03698ec253885dd8e Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Sun, 18 Sep 2011 16:44:54 -0400 Subject: 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. --- src/thread/arm/syscall_cp.s | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 src/thread/arm/syscall_cp.s (limited to 'src/thread/arm/syscall_cp.s') diff --git a/src/thread/arm/syscall_cp.s b/src/thread/arm/syscall_cp.s new file mode 100644 index 00000000..59924fc5 --- /dev/null +++ b/src/thread/arm/syscall_cp.s @@ -0,0 +1,23 @@ +.global __syscall_cp_asm +.type __syscall_cp_asm,%function +__syscall_cp_asm: + mov ip,sp + stmfd sp!,{r4,r5,r6,r7,lr} + stmfd sp!,{r0} + bl 1f +1: mov r4,#(1f-.) + add r4,r4,lr + str r4,[r0,#4] + str sp,[r0] + mov r7,r1 + mov r0,r2 + mov r1,r3 + ldmfd ip,{r2,r3,r4,r5,r6} +1: svc 0 + ldmfd sp!,{r1} + mov r2,#0 + str r2,[r1] + ldmfd sp!,{r4,r5,r6,r7,lr} + tst lr,#1 + moveq pc,lr + bx lr -- cgit v1.2.1