Author: andrew
Date: Wed Jul 8 14:07:06 2015
New Revision: 285271
URL: https://svnweb.freebsd.org/changeset/base/285271
Log:
Add an implementation of savectx that doesn't just call panic.
Obtained from: ABT Systems Ltd
Sponsored by: The FreeBSD Foundation
Modified:
head/sys/arm64/arm64/swtch.S
Modified: head/sys/arm64/arm64/swtch.S
==============================================================================
--- head/sys/arm64/arm64/swtch.S Wed Jul 8 13:52:59 2015
(r285270)
+++ head/sys/arm64/arm64/swtch.S Wed Jul 8 14:07:06 2015
(r285271)
@@ -246,10 +246,31 @@ ENTRY(fork_trampoline)
END(fork_trampoline)
ENTRY(savectx)
- adr x0, .Lsavectx_panic_str
- bl panic
+ /* Store the callee-saved registers */
+ stp x8, x9, [x0, #PCB_REGS + 8 * 8]
+ stp x10, x11, [x0, #PCB_REGS + 10 * 8]
+ stp x12, x13, [x0, #PCB_REGS + 12 * 8]
+ stp x14, x15, [x0, #PCB_REGS + 14 * 8]
+ stp x16, x17, [x0, #PCB_REGS + 16 * 8]
+ stp x18, x19, [x0, #PCB_REGS + 18 * 8]
+ stp x20, x21, [x0, #PCB_REGS + 20 * 8]
+ stp x22, x23, [x0, #PCB_REGS + 22 * 8]
+ stp x24, x25, [x0, #PCB_REGS + 24 * 8]
+ stp x26, x27, [x0, #PCB_REGS + 26 * 8]
+ stp x28, x29, [x0, #PCB_REGS + 28 * 8]
+ str x30, [x0, #PCB_REGS + 30 * 8]
+ /* And the old stack pointer */
+ mov x5, sp
+ mrs x6, tpidr_el0
+ stp x5, x6, [x0, #PCB_SP]
+
+ /* Store the VFP registers */
+#ifdef VFP
+ mov x29, lr
+ bl vfp_save_state
+ mov lr, x29
+#endif
+
ret
-.Lsavectx_panic_str:
- .asciz "savectx"
END(savectx)
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