blob: 1d7e274f3f2b42bfac80354f1745c7ad48cd9e27 [file] [log] [blame]
David S. Miller6eda3a72008-04-28 00:47:20 -07001 /* 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
Heiko Carstens11347232009-01-14 14:13:56 +010023sys_sparc_pipe:
David S. Millere4265012009-01-19 21:11:27 -080024 ba,pt %xcc, sys_sparc_pipe_real
David S. Miller6eda3a72008-04-28 00:47:20 -070025 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
David S. Millerc658ad12009-12-11 00:44:47 -080065 andcc %l5, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %g0
David S. Miller6eda3a72008-04-28 00:47:20 -070066 be,pt %icc, rtrap
67 nop
David S. Millerfe06cca2008-08-24 20:10:23 -070068 call syscall_trace_leave
69 add %sp, PTREGS_OFF, %o0
David S. Miller6eda3a72008-04-28 00:47:20 -070070 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:
David S. Millerc7d5a002010-03-03 08:08:49 -0800113 /* Clear current_thread_info()->new_child. */
David S. Miller6eda3a72008-04-28 00:47:20 -0700114 stb %g0, [%g6 + TI_NEW_CHILD]
115 ldx [%g6 + TI_FLAGS], %l0
116 call schedule_tail
117 mov %g7, %o0
David S. Millerc7d5a002010-03-03 08:08:49 -0800118 ba,pt %xcc, ret_sys_call
David S. Miller6eda3a72008-04-28 00:47:20 -0700119 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:
David S. Millerfe06cca2008-08-24 20:10:23 -0700142 call syscall_trace_enter
143 add %sp, PTREGS_OFF, %o0
Roland McGrath73ccefa2008-07-27 00:30:50 -0700144 brnz,pn %o0, 3f
145 mov -ENOSYS, %o0
David S. Miller6eda3a72008-04-28 00:47:20 -0700146 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:
David S. Millerfe06cca2008-08-24 20:10:23 -0700154 call syscall_trace_enter
155 add %sp, PTREGS_OFF, %o0
Roland McGrath73ccefa2008-07-27 00:30:50 -0700156 brnz,pn %o0, 3f
157 mov -ENOSYS, %o0
David S. Miller6eda3a72008-04-28 00:47:20 -0700158 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. */
David S. Millerc658ad12009-12-11 00:44:47 -0800171 cmp %g1, NR_syscalls ! IEU1 Group
David S. Miller6eda3a72008-04-28 00:47:20 -0700172 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
David S. Millerc658ad12009-12-11 00:44:47 -0800182 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %g0
David S. Miller6eda3a72008-04-28 00:47:20 -0700183 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. */
David S. Millerc658ad12009-12-11 00:44:47 -0800194 cmp %g1, NR_syscalls ! IEU1 Group
David S. Miller6eda3a72008-04-28 00:47:20 -0700195 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
David S. Millerc658ad12009-12-11 00:44:47 -0800205 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %g0
David S. Miller6eda3a72008-04-28 00:47:20 -0700206 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
David S. Millerc658ad12009-12-11 00:44:47 -0800229 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %l6
David S. Miller6eda3a72008-04-28 00:47:20 -070023080:
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 */
David S. Millerc658ad12009-12-11 00:44:47 -0800244 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %l6
David S. Miller6eda3a72008-04-28 00:47:20 -0700245 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:
David S. Millerfe06cca2008-08-24 20:10:23 -0700256 call syscall_trace_leave
257 add %sp, PTREGS_OFF, %o0
David S. Miller6eda3a72008-04-28 00:47:20 -0700258 stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC]
259 ba,pt %xcc, rtrap
260 stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC]