Differential D37255 Diff 112615 sys/arm64/arm64/swtch.S

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sys/arm64/arm64/swtch.S

Show First 20 Lines • Show All 74 Lines • ▼ Show 20 Lines	#ifdef VFP
bl vfp_discard		bl vfp_discard
mov x0, x19		mov x0, x19
#else		#else
mov x0, x1		mov x0, x1
#endif		#endif

/* This returns the thread pointer so no need to save it */		/* This returns the thread pointer so no need to save it */
bl ptrauth_switch		bl ptrauth_switch
		#ifdef PERTHREAD_SSP
		mov x19, x0
		#endif
/* This returns the thread pcb */		/* This returns the thread pcb */
bl pmap_switch		bl pmap_switch
mov x4, x0		mov x4, x0
		#ifdef PERTHREAD_SSP
		/* Update the per-thread stack canary pointer. */
		add x19, x19, #(TD_MD_CANARY)
		msr sp_el0, x19
		#endif

/* If we are single stepping, enable it */		/* If we are single stepping, enable it */
ldr w5, [x4, #PCB_FLAGS]		ldr w5, [x4, #PCB_FLAGS]
set_step_flag w5, x6		set_step_flag w5, x6

/* Restore the registers */		/* Restore the registers */
ldp x5, x6, [x4, #PCB_SP]		ldp x5, x6, [x4, #PCB_SP]
mov sp, x5		mov sp, x5
▲ Show 20 Lines • Show All 60 Lines • ▼ Show 20 Lines	#endif
/* This returns the thread pcb */		/* This returns the thread pcb */
bl pmap_switch		bl pmap_switch
/* Move the new pcb out of the way */		/* Move the new pcb out of the way */
mov x4, x0		mov x4, x0

mov x2, x21		mov x2, x21
mov x1, x20		mov x1, x20
mov x0, x19		mov x0, x19
		#ifdef PERTHREAD_SSP
		/* Update the per-thread stack canary pointer. */
		add x20, x20, #(TD_MD_CANARY)
		msr sp_el0, x20
		#endif

/*		/*
* Release the old thread.		* Release the old thread.
*/		*/
stlr x2, [x0, #TD_LOCK]		stlr x2, [x0, #TD_LOCK]
#if defined(SCHED_ULE) && defined(SMP)		#if defined(SCHED_ULE) && defined(SMP)
/* Spin if TD_LOCK points to a blocked_lock */		/* Spin if TD_LOCK points to a blocked_lock */
ldr x2, =_C_LABEL(blocked_lock)		ldr x2, =_C_LABEL(blocked_lock)
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