1	/* SunOS's execv() call only specifies the argv argument, the
  2	 * environment settings are the same as the calling processes.
  3	 */
  4sys_execve:
  5	sethi	%hi(sparc_execve), %g1
  6	ba,pt	%xcc, execve_merge
  7	 or	%g1, %lo(sparc_execve), %g1
 
 
 
 
 
  8
  9#ifdef CONFIG_COMPAT
 10sunos_execv:
 11	stx	%g0, [%sp + PTREGS_OFF + PT_V9_I2]
 12sys32_execve:
 13	sethi	%hi(sparc32_execve), %g1
 14	or	%g1, %lo(sparc32_execve), %g1
 15#endif
 16
 17execve_merge:
 18	flushw
 19	jmpl	%g1, %g0
 20	 add	%sp, PTREGS_OFF, %o0
 
 21
 22	.align	32
 23sys_sparc_pipe:
 24	ba,pt	%xcc, sys_sparc_pipe_real
 25	 add	%sp, PTREGS_OFF, %o0
 26sys_nis_syscall:
 27	ba,pt	%xcc, c_sys_nis_syscall
 28	 add	%sp, PTREGS_OFF, %o0
 29sys_memory_ordering:
 30	ba,pt	%xcc, sparc_memory_ordering
 31	 add	%sp, PTREGS_OFF, %o1
 32sys_sigaltstack:
 33	ba,pt	%xcc, do_sigaltstack
 34	 add	%i6, STACK_BIAS, %o2
 35#ifdef CONFIG_COMPAT
 36sys32_sigstack:
 37	ba,pt	%xcc, do_sys32_sigstack
 38	 mov	%i6, %o2
 39sys32_sigaltstack:
 40	ba,pt	%xcc, do_sys32_sigaltstack
 41	 mov	%i6, %o2
 42#endif
 43	.align	32
 44#ifdef CONFIG_COMPAT
 45sys32_sigreturn:
 46	add	%sp, PTREGS_OFF, %o0
 47	call	do_sigreturn32
 48	 add	%o7, 1f-.-4, %o7
 49	nop
 50#endif
 51sys_rt_sigreturn:
 52	add	%sp, PTREGS_OFF, %o0
 53	call	do_rt_sigreturn
 54	 add	%o7, 1f-.-4, %o7
 55	nop
 56#ifdef CONFIG_COMPAT
 57sys32_rt_sigreturn:
 58	add	%sp, PTREGS_OFF, %o0
 59	call	do_rt_sigreturn32
 60	 add	%o7, 1f-.-4, %o7
 61	nop
 62#endif
 63	.align	32
 641:	ldx	[%g6 + TI_FLAGS], %l5
 65	andcc	%l5, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %g0
 66	be,pt	%icc, rtrap
 67	 nop
 68	call	syscall_trace_leave
 69	 add	%sp, PTREGS_OFF, %o0
 70	ba,pt	%xcc, rtrap
 71	 nop
 72
 73	/* This is how fork() was meant to be done, 8 instruction entry.
 74	 *
 75	 * I questioned the following code briefly, let me clear things
 76	 * up so you must not reason on it like I did.
 77	 *
 78	 * Know the fork_kpsr etc. we use in the sparc32 port?  We don't
 79	 * need it here because the only piece of window state we copy to
 80	 * the child is the CWP register.  Even if the parent sleeps,
 81	 * we are safe because we stuck it into pt_regs of the parent
 82	 * so it will not change.
 83	 *
 84	 * XXX This raises the question, whether we can do the same on
 85	 * XXX sparc32 to get rid of fork_kpsr _and_ fork_kwim.  The
 86	 * XXX answer is yes.  We stick fork_kpsr in UREG_G0 and
 87	 * XXX fork_kwim in UREG_G1 (global registers are considered
 88	 * XXX volatile across a system call in the sparc ABI I think
 89	 * XXX if it isn't we can use regs->y instead, anyone who depends
 90	 * XXX upon the Y register being preserved across a fork deserves
 91	 * XXX to lose).
 92	 *
 93	 * In fact we should take advantage of that fact for other things
 94	 * during system calls...
 95	 */
 96	.align	32
 97sys_vfork: /* Under Linux, vfork and fork are just special cases of clone. */
 98	sethi	%hi(0x4000 | 0x0100 | SIGCHLD), %o0
 99	or	%o0, %lo(0x4000 | 0x0100 | SIGCHLD), %o0
100	ba,pt	%xcc, sys_clone
 
 
101sys_fork:
102	 clr	%o1
103	mov	SIGCHLD, %o0
 
 
 
104sys_clone:
105	flushw
106	movrz	%o1, %fp, %o1
107	mov	0, %o3
108	ba,pt	%xcc, sparc_do_fork
109	 add	%sp, PTREGS_OFF, %o2
110
111	.globl	ret_from_syscall
112ret_from_syscall:
113	/* Clear current_thread_info()->new_child. */
114	stb	%g0, [%g6 + TI_NEW_CHILD]
115	ldx	[%g6 + TI_FLAGS], %l0
116	call	schedule_tail
117	 mov	%g7, %o0
 
 
 
 
 
 
118	ba,pt	%xcc, ret_sys_call
119	 ldx	[%sp + PTREGS_OFF + PT_V9_I0], %o0
 
 
 
 
 
 
 
 
120
121	.globl	sparc_exit
122	.type	sparc_exit,#function
123sparc_exit:
124	rdpr	%pstate, %g2
 
 
125	wrpr	%g2, PSTATE_IE, %pstate
126	rdpr	%otherwin, %g1
127	rdpr	%cansave, %g3
128	add	%g3, %g1, %g3
129	wrpr	%g3, 0x0, %cansave
130	wrpr	%g0, 0x0, %otherwin
131	wrpr	%g2, 0x0, %pstate
132	ba,pt	%xcc, sys_exit
133	 stb	%g0, [%g6 + TI_WSAVED]
134	.size	sparc_exit,.-sparc_exit
135
136linux_sparc_ni_syscall:
137	sethi	%hi(sys_ni_syscall), %l7
138	ba,pt	%xcc, 4f
139	 or	%l7, %lo(sys_ni_syscall), %l7
140
141linux_syscall_trace32:
142	call	syscall_trace_enter
143	 add	%sp, PTREGS_OFF, %o0
144	brnz,pn	%o0, 3f
145	 mov	-ENOSYS, %o0
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
146	srl	%i0, 0, %o0
 
147	srl	%i4, 0, %o4
148	srl	%i1, 0, %o1
149	srl	%i2, 0, %o2
150	ba,pt	%xcc, 2f
151	 srl	%i3, 0, %o3
152
153linux_syscall_trace:
154	call	syscall_trace_enter
155	 add	%sp, PTREGS_OFF, %o0
156	brnz,pn	%o0, 3f
157	 mov	-ENOSYS, %o0
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
158	mov	%i0, %o0
 
159	mov	%i1, %o1
160	mov	%i2, %o2
161	mov	%i3, %o3
162	b,pt	%xcc, 2f
163	 mov	%i4, %o4
164
165
166	/* Linux 32-bit system calls enter here... */
167	.align	32
168	.globl	linux_sparc_syscall32
169linux_sparc_syscall32:
170	/* Direct access to user regs, much faster. */
171	cmp	%g1, NR_syscalls			! IEU1	Group
172	bgeu,pn	%xcc, linux_sparc_ni_syscall		! CTI
173	 srl	%i0, 0, %o0				! IEU0
174	sll	%g1, 2, %l4				! IEU0	Group
175	srl	%i4, 0, %o4				! IEU1
176	lduw	[%l7 + %l4], %l7			! Load
177	srl	%i1, 0, %o1				! IEU0	Group
178	ldx	[%g6 + TI_FLAGS], %l0		! Load
179
180	srl	%i5, 0, %o5				! IEU1
181	srl	%i2, 0, %o2				! IEU0	Group
182	andcc	%l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %g0
183	bne,pn	%icc, linux_syscall_trace32		! CTI
184	 mov	%i0, %l5				! IEU1
185	call	%l7					! CTI	Group brk forced
186	 srl	%i3, 0, %o3				! IEU0
187	ba,a,pt	%xcc, 3f
 
188
189	/* Linux native system calls enter here... */
190	.align	32
191	.globl	linux_sparc_syscall
192linux_sparc_syscall:
193	/* Direct access to user regs, much faster. */
194	cmp	%g1, NR_syscalls			! IEU1	Group
195	bgeu,pn	%xcc, linux_sparc_ni_syscall		! CTI
196	 mov	%i0, %o0				! IEU0
197	sll	%g1, 2, %l4				! IEU0	Group
198	mov	%i1, %o1				! IEU1
199	lduw	[%l7 + %l4], %l7			! Load
2004:	mov	%i2, %o2				! IEU0	Group
201	ldx	[%g6 + TI_FLAGS], %l0		! Load
202
203	mov	%i3, %o3				! IEU1
204	mov	%i4, %o4				! IEU0	Group
205	andcc	%l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %g0
206	bne,pn	%icc, linux_syscall_trace		! CTI	Group
207	 mov	%i0, %l5				! IEU0
2082:	call	%l7					! CTI	Group brk forced
209	 mov	%i5, %o5				! IEU0
210	nop
211
2123:	stx	%o0, [%sp + PTREGS_OFF + PT_V9_I0]
213ret_sys_call:
214	ldx	[%sp + PTREGS_OFF + PT_V9_TSTATE], %g3
215	ldx	[%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc
216	sra	%o0, 0, %o0
217	mov	%ulo(TSTATE_XCARRY | TSTATE_ICARRY), %g2
218	sllx	%g2, 32, %g2
219
220	/* Check if force_successful_syscall_return()
221	 * was invoked.
222	 */
223	ldub	[%g6 + TI_SYS_NOERROR], %l2
224	brnz,a,pn %l2, 80f
225	 stb	%g0, [%g6 + TI_SYS_NOERROR]
226
227	cmp	%o0, -ERESTART_RESTARTBLOCK
228	bgeu,pn	%xcc, 1f
229	 andcc	%l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %l6
23080:
 
 
231	/* System call success, clear Carry condition code. */
232	andn	%g3, %g2, %g3
 
233	stx	%g3, [%sp + PTREGS_OFF + PT_V9_TSTATE]	
234	bne,pn	%icc, linux_syscall_trace2
235	 add	%l1, 0x4, %l2			! npc = npc+4
236	stx	%l1, [%sp + PTREGS_OFF + PT_V9_TPC]
237	ba,pt	%xcc, rtrap
238	 stx	%l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
239
2401:
 
 
 
 
 
 
241	/* System call failure, set Carry condition code.
242	 * Also, get abs(errno) to return to the process.
243	 */
244	andcc	%l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %l6	
245	sub	%g0, %o0, %o0
246	or	%g3, %g2, %g3
247	stx	%o0, [%sp + PTREGS_OFF + PT_V9_I0]
248	stx	%g3, [%sp + PTREGS_OFF + PT_V9_TSTATE]
249	bne,pn	%icc, linux_syscall_trace2
250	 add	%l1, 0x4, %l2			! npc = npc+4
251	stx	%l1, [%sp + PTREGS_OFF + PT_V9_TPC]
252
253	b,pt	%xcc, rtrap
254	 stx	%l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
255linux_syscall_trace2:
256	call	syscall_trace_leave
257	 add	%sp, PTREGS_OFF, %o0
258	stx	%l1, [%sp + PTREGS_OFF + PT_V9_TPC]
259	ba,pt	%xcc, rtrap
260	 stx	%l2, [%sp + PTREGS_OFF + PT_V9_TNPC]

  1/* SPDX-License-Identifier: GPL-2.0 */
  2	/* SunOS's execv() call only specifies the argv argument, the
  3	 * environment settings are the same as the calling processes.
  4	 */
  5sys64_execve:
  6	set	sys_execve, %g1
  7	jmpl	%g1, %g0
  8	 flushw
  9
 10sys64_execveat:
 11	set	sys_execveat, %g1
 12	jmpl	%g1, %g0
 13	 flushw
 14
 15#ifdef CONFIG_COMPAT
 16sunos_execv:
 17	mov	%g0, %o2
 18sys32_execve:
 19	set	compat_sys_execve, %g1
 20	jmpl	%g1, %g0
 21	 flushw
 22
 23sys32_execveat:
 24	set	compat_sys_execveat, %g1
 25	jmpl	%g1, %g0
 26	 flushw
 27#endif
 28
 29	.align	32
 
 
 
 
 
 
 
 
 
 
 
 
 30#ifdef CONFIG_COMPAT
 31sys32_sigstack:
 32	ba,pt	%xcc, do_sys32_sigstack
 33	 mov	%i6, %o2
 
 
 
 34#endif
 35	.align	32
 36#ifdef CONFIG_COMPAT
 37sys32_sigreturn:
 38	add	%sp, PTREGS_OFF, %o0
 39	call	do_sigreturn32
 40	 add	%o7, 1f-.-4, %o7
 41	nop
 42#endif
 43sys_rt_sigreturn:
 44	add	%sp, PTREGS_OFF, %o0
 45	call	do_rt_sigreturn
 46	 add	%o7, 1f-.-4, %o7
 47	nop
 48#ifdef CONFIG_COMPAT
 49sys32_rt_sigreturn:
 50	add	%sp, PTREGS_OFF, %o0
 51	call	do_rt_sigreturn32
 52	 add	%o7, 1f-.-4, %o7
 53	nop
 54#endif
 55	.align	32
 561:	ldx	[%g6 + TI_FLAGS], %l5
 57	andcc	%l5, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT|_TIF_NOHZ), %g0
 58	be,pt	%icc, rtrap
 59	 nop
 60	call	syscall_trace_leave
 61	 add	%sp, PTREGS_OFF, %o0
 62	ba,pt	%xcc, rtrap
 63	 nop
 64
 65	/* This is how fork() was meant to be done, 8 instruction entry.
 66	 *
 67	 * I questioned the following code briefly, let me clear things
 68	 * up so you must not reason on it like I did.
 69	 *
 70	 * Know the fork_kpsr etc. we use in the sparc32 port?  We don't
 71	 * need it here because the only piece of window state we copy to
 72	 * the child is the CWP register.  Even if the parent sleeps,
 73	 * we are safe because we stuck it into pt_regs of the parent
 74	 * so it will not change.
 75	 *
 76	 * XXX This raises the question, whether we can do the same on
 77	 * XXX sparc32 to get rid of fork_kpsr _and_ fork_kwim.  The
 78	 * XXX answer is yes.  We stick fork_kpsr in UREG_G0 and
 79	 * XXX fork_kwim in UREG_G1 (global registers are considered
 80	 * XXX volatile across a system call in the sparc ABI I think
 81	 * XXX if it isn't we can use regs->y instead, anyone who depends
 82	 * XXX upon the Y register being preserved across a fork deserves
 83	 * XXX to lose).
 84	 *
 85	 * In fact we should take advantage of that fact for other things
 86	 * during system calls...
 87	 */
 88	.align	32
 89sys_vfork:
 90	flushw
 91	ba,pt	%xcc, sparc_vfork
 92	 add	%sp, PTREGS_OFF, %o0
 93
 94	.align	32
 95sys_fork:
 96	flushw
 97	ba,pt	%xcc, sparc_fork
 98	 add	%sp, PTREGS_OFF, %o0
 99
100	.align	32
101sys_clone:
102	flushw
103	ba,pt	%xcc, sparc_clone
104	 add	%sp, PTREGS_OFF, %o0
 
 
105
106	.globl	ret_from_fork
107ret_from_fork:
108	/* Clear current_thread_info()->new_child. */
109	stb	%g0, [%g6 + TI_NEW_CHILD]
 
110	call	schedule_tail
111	 mov	%g7, %o0
112	ldx	[%sp + PTREGS_OFF + PT_V9_I0], %o0
113	brnz,pt	%o0, ret_sys_call
114	 ldx	[%g6 + TI_FLAGS], %l0
115	ldx	[%sp + PTREGS_OFF + PT_V9_G1], %l1
116	call	%l1
117	 ldx	[%sp + PTREGS_OFF + PT_V9_G2], %o0
118	ba,pt	%xcc, ret_sys_call
119	 mov	0, %o0
120
121	.globl	sparc_exit_group
122	.type	sparc_exit_group,#function
123sparc_exit_group:
124	sethi	%hi(sys_exit_group), %g7
125	ba,pt	%xcc, 1f
126	 or	%g7, %lo(sys_exit_group), %g7
127	.size	sparc_exit_group,.-sparc_exit_group
128
129	.globl	sparc_exit
130	.type	sparc_exit,#function
131sparc_exit:
132	sethi	%hi(sys_exit), %g7
133	or	%g7, %lo(sys_exit), %g7
1341:	rdpr	%pstate, %g2
135	wrpr	%g2, PSTATE_IE, %pstate
136	rdpr	%otherwin, %g1
137	rdpr	%cansave, %g3
138	add	%g3, %g1, %g3
139	wrpr	%g3, 0x0, %cansave
140	wrpr	%g0, 0x0, %otherwin
141	wrpr	%g2, 0x0, %pstate
142	jmpl	%g7, %g0
143	 stb	%g0, [%g6 + TI_WSAVED]
144	.size	sparc_exit,.-sparc_exit
145
146linux_sparc_ni_syscall:
147	sethi	%hi(sys_ni_syscall), %l7
148	ba,pt	%xcc, 4f
149	 or	%l7, %lo(sys_ni_syscall), %l7
150
151linux_syscall_trace32:
152	call	syscall_trace_enter
153	 add	%sp, PTREGS_OFF, %o0
154	brnz,pn	%o0, 3f
155	 mov	-ENOSYS, %o0
156
157	/* Syscall tracing can modify the registers.  */
158	ldx	[%sp + PTREGS_OFF + PT_V9_G1], %g1
159	sethi	%hi(sys_call_table32), %l7
160	ldx	[%sp + PTREGS_OFF + PT_V9_I0], %i0
161	or	%l7, %lo(sys_call_table32), %l7
162	ldx	[%sp + PTREGS_OFF + PT_V9_I1], %i1
163	ldx	[%sp + PTREGS_OFF + PT_V9_I2], %i2
164	ldx	[%sp + PTREGS_OFF + PT_V9_I3], %i3
165	ldx	[%sp + PTREGS_OFF + PT_V9_I4], %i4
166	ldx	[%sp + PTREGS_OFF + PT_V9_I5], %i5
167
168	cmp	%g1, NR_syscalls
169	bgeu,pn	%xcc, 3f
170	 mov	-ENOSYS, %o0
171
172	sll	%g1, 2, %l4
173	srl	%i0, 0, %o0
174	lduw	[%l7 + %l4], %l7
175	srl	%i4, 0, %o4
176	srl	%i1, 0, %o1
177	srl	%i2, 0, %o2
178	ba,pt	%xcc, 5f
179	 srl	%i3, 0, %o3
180
181linux_syscall_trace:
182	call	syscall_trace_enter
183	 add	%sp, PTREGS_OFF, %o0
184	brnz,pn	%o0, 3f
185	 mov	-ENOSYS, %o0
186
187	/* Syscall tracing can modify the registers.  */
188	ldx	[%sp + PTREGS_OFF + PT_V9_G1], %g1
189	sethi	%hi(sys_call_table64), %l7
190	ldx	[%sp + PTREGS_OFF + PT_V9_I0], %i0
191	or	%l7, %lo(sys_call_table64), %l7
192	ldx	[%sp + PTREGS_OFF + PT_V9_I1], %i1
193	ldx	[%sp + PTREGS_OFF + PT_V9_I2], %i2
194	ldx	[%sp + PTREGS_OFF + PT_V9_I3], %i3
195	ldx	[%sp + PTREGS_OFF + PT_V9_I4], %i4
196	ldx	[%sp + PTREGS_OFF + PT_V9_I5], %i5
197
198	cmp	%g1, NR_syscalls
199	bgeu,pn	%xcc, 3f
200	 mov	-ENOSYS, %o0
201
202	sll	%g1, 2, %l4
203	mov	%i0, %o0
204	lduw	[%l7 + %l4], %l7
205	mov	%i1, %o1
206	mov	%i2, %o2
207	mov	%i3, %o3
208	b,pt	%xcc, 2f
209	 mov	%i4, %o4
210
211
212	/* Linux 32-bit system calls enter here... */
213	.align	32
214	.globl	linux_sparc_syscall32
215linux_sparc_syscall32:
216	/* Direct access to user regs, much faster. */
217	cmp	%g1, NR_syscalls			! IEU1	Group
218	bgeu,pn	%xcc, linux_sparc_ni_syscall		! CTI
219	 srl	%i0, 0, %o0				! IEU0
220	sll	%g1, 2, %l4				! IEU0	Group
221	srl	%i4, 0, %o4				! IEU1
222	lduw	[%l7 + %l4], %l7			! Load
223	srl	%i1, 0, %o1				! IEU0	Group
224	ldx	[%g6 + TI_FLAGS], %l0		! Load
225
226	srl	%i3, 0, %o3				! IEU0
227	srl	%i2, 0, %o2				! IEU0	Group
228	andcc	%l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT|_TIF_NOHZ), %g0
229	bne,pn	%icc, linux_syscall_trace32		! CTI
230	 mov	%i0, %l5				! IEU1
2315:	call	%l7					! CTI	Group brk forced
232	 srl	%i5, 0, %o5				! IEU1
233	ba,pt	%xcc, 3f
234	 sra	%o0, 0, %o0
235
236	/* Linux native system calls enter here... */
237	.align	32
238	.globl	linux_sparc_syscall
239linux_sparc_syscall:
240	/* Direct access to user regs, much faster. */
241	cmp	%g1, NR_syscalls			! IEU1	Group
242	bgeu,pn	%xcc, linux_sparc_ni_syscall		! CTI
243	 mov	%i0, %o0				! IEU0
244	sll	%g1, 2, %l4				! IEU0	Group
245	mov	%i1, %o1				! IEU1
246	lduw	[%l7 + %l4], %l7			! Load
2474:	mov	%i2, %o2				! IEU0	Group
248	ldx	[%g6 + TI_FLAGS], %l0		! Load
249
250	mov	%i3, %o3				! IEU1
251	mov	%i4, %o4				! IEU0	Group
252	andcc	%l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT|_TIF_NOHZ), %g0
253	bne,pn	%icc, linux_syscall_trace		! CTI	Group
254	 mov	%i0, %l5				! IEU0
2552:	call	%l7					! CTI	Group brk forced
256	 mov	%i5, %o5				! IEU0
257	nop
258
2593:	stx	%o0, [%sp + PTREGS_OFF + PT_V9_I0]
260ret_sys_call:
261	ldx	[%sp + PTREGS_OFF + PT_V9_TSTATE], %g3
 
 
262	mov	%ulo(TSTATE_XCARRY | TSTATE_ICARRY), %g2
263	sllx	%g2, 32, %g2
264
 
 
 
 
 
 
 
265	cmp	%o0, -ERESTART_RESTARTBLOCK
266	bgeu,pn	%xcc, 1f
267	 andcc	%l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT|_TIF_NOHZ), %g0
268	ldx	[%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc
269
2702:
271	/* System call success, clear Carry condition code. */
272	andn	%g3, %g2, %g3
2733:
274	stx	%g3, [%sp + PTREGS_OFF + PT_V9_TSTATE]	
275	bne,pn	%icc, linux_syscall_trace2
276	 add	%l1, 0x4, %l2			! npc = npc+4
277	stx	%l1, [%sp + PTREGS_OFF + PT_V9_TPC]
278	ba,pt	%xcc, rtrap
279	 stx	%l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
280
2811:
282	/* Check if force_successful_syscall_return()
283	 * was invoked.
284	 */
285	ldub	[%g6 + TI_SYS_NOERROR], %l2
286	brnz,pn %l2, 2b
287	 ldx	[%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc
288	/* System call failure, set Carry condition code.
289	 * Also, get abs(errno) to return to the process.
290	 */
 
291	sub	%g0, %o0, %o0
 
292	stx	%o0, [%sp + PTREGS_OFF + PT_V9_I0]
293	ba,pt	%xcc, 3b
294	 or	%g3, %g2, %g3
 
 
295
 
 
296linux_syscall_trace2:
297	call	syscall_trace_leave
298	 add	%sp, PTREGS_OFF, %o0
299	stx	%l1, [%sp + PTREGS_OFF + PT_V9_TPC]
300	ba,pt	%xcc, rtrap
301	 stx	%l2, [%sp + PTREGS_OFF + PT_V9_TNPC]