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Add an implementation of savectx that doesn't just call panic.

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Obtained from:	ABT Systems Ltd
Sponsored by:	The FreeBSD Foundation
This commit is contained in:
Andrew Turner 2015-07-08 14:07:06 +00:00
parent 4981c60e07
commit 80ad08a3e9
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=285271
1 changed files with 25 additions and 4 deletions
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29
sys/arm64/arm64/swtch.S
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@ -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)