1 /* SunOS's execv() call only specifies the argv argument, the
2 * environment settings are the same as the calling processes.
18 set compat_sys_execve, %g1
23 set compat_sys_execveat, %g1
30 ba,pt %xcc, sys_sparc_pipe_real
31 add %sp, PTREGS_OFF, %o0
33 ba,pt %xcc, c_sys_nis_syscall
34 add %sp, PTREGS_OFF, %o0
36 ba,pt %xcc, sparc_memory_ordering
37 add %sp, PTREGS_OFF, %o1
40 ba,pt %xcc, do_sys32_sigstack
46 add %sp, PTREGS_OFF, %o0
52 add %sp, PTREGS_OFF, %o0
58 add %sp, PTREGS_OFF, %o0
59 call do_rt_sigreturn32
64 1: ldx [%g6 + TI_FLAGS], %l5
65 andcc %l5, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT|_TIF_NOHZ), %g0
68 call syscall_trace_leave
69 add %sp, PTREGS_OFF, %o0
73 /* This is how fork() was meant to be done, 8 instruction entry.
75 * I questioned the following code briefly, let me clear things
76 * up so you must not reason on it like I did.
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.
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
93 * In fact we should take advantage of that fact for other things
94 * during system calls...
97 sys_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
108 ba,pt %xcc, sparc_do_fork
109 add %sp, PTREGS_OFF, %o2
113 /* Clear current_thread_info()->new_child. */
114 stb %g0, [%g6 + TI_NEW_CHILD]
117 ldx [%sp + PTREGS_OFF + PT_V9_I0], %o0
118 brnz,pt %o0, ret_sys_call
119 ldx [%g6 + TI_FLAGS], %l0
120 ldx [%sp + PTREGS_OFF + PT_V9_G1], %l1
122 ldx [%sp + PTREGS_OFF + PT_V9_G2], %o0
123 ba,pt %xcc, ret_sys_call
126 .globl sparc_exit_group
127 .type sparc_exit_group,#function
129 sethi %hi(sys_exit_group), %g7
131 or %g7, %lo(sys_exit_group), %g7
132 .size sparc_exit_group,.-sparc_exit_group
135 .type sparc_exit,#function
137 sethi %hi(sys_exit), %g7
138 or %g7, %lo(sys_exit), %g7
140 wrpr %g2, PSTATE_IE, %pstate
144 wrpr %g3, 0x0, %cansave
145 wrpr %g0, 0x0, %otherwin
146 wrpr %g2, 0x0, %pstate
148 stb %g0, [%g6 + TI_WSAVED]
149 .size sparc_exit,.-sparc_exit
151 linux_sparc_ni_syscall:
152 sethi %hi(sys_ni_syscall), %l7
154 or %l7, %lo(sys_ni_syscall), %l7
156 linux_syscall_trace32:
157 call syscall_trace_enter
158 add %sp, PTREGS_OFF, %o0
162 /* Syscall tracing can modify the registers. */
163 ldx [%sp + PTREGS_OFF + PT_V9_G1], %g1
164 sethi %hi(sys_call_table32), %l7
165 ldx [%sp + PTREGS_OFF + PT_V9_I0], %i0
166 or %l7, %lo(sys_call_table32), %l7
167 ldx [%sp + PTREGS_OFF + PT_V9_I1], %i1
168 ldx [%sp + PTREGS_OFF + PT_V9_I2], %i2
169 ldx [%sp + PTREGS_OFF + PT_V9_I3], %i3
170 ldx [%sp + PTREGS_OFF + PT_V9_I4], %i4
171 ldx [%sp + PTREGS_OFF + PT_V9_I5], %i5
179 lduw [%l7 + %l4], %l7
187 call syscall_trace_enter
188 add %sp, PTREGS_OFF, %o0
192 /* Syscall tracing can modify the registers. */
193 ldx [%sp + PTREGS_OFF + PT_V9_G1], %g1
194 sethi %hi(sys_call_table64), %l7
195 ldx [%sp + PTREGS_OFF + PT_V9_I0], %i0
196 or %l7, %lo(sys_call_table64), %l7
197 ldx [%sp + PTREGS_OFF + PT_V9_I1], %i1
198 ldx [%sp + PTREGS_OFF + PT_V9_I2], %i2
199 ldx [%sp + PTREGS_OFF + PT_V9_I3], %i3
200 ldx [%sp + PTREGS_OFF + PT_V9_I4], %i4
201 ldx [%sp + PTREGS_OFF + PT_V9_I5], %i5
209 lduw [%l7 + %l4], %l7
217 /* Linux 32-bit system calls enter here... */
219 .globl linux_sparc_syscall32
220 linux_sparc_syscall32:
221 /* Direct access to user regs, much faster. */
222 cmp %g1, NR_syscalls ! IEU1 Group
223 bgeu,pn %xcc, linux_sparc_ni_syscall ! CTI
224 srl %i0, 0, %o0 ! IEU0
225 sll %g1, 2, %l4 ! IEU0 Group
226 srl %i4, 0, %o4 ! IEU1
227 lduw [%l7 + %l4], %l7 ! Load
228 srl %i1, 0, %o1 ! IEU0 Group
229 ldx [%g6 + TI_FLAGS], %l0 ! Load
231 srl %i3, 0, %o3 ! IEU0
232 srl %i2, 0, %o2 ! IEU0 Group
233 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT|_TIF_NOHZ), %g0
234 bne,pn %icc, linux_syscall_trace32 ! CTI
236 5: call %l7 ! CTI Group brk forced
237 srl %i5, 0, %o5 ! IEU1
241 /* Linux native system calls enter here... */
243 .globl linux_sparc_syscall
245 /* Direct access to user regs, much faster. */
246 cmp %g1, NR_syscalls ! IEU1 Group
247 bgeu,pn %xcc, linux_sparc_ni_syscall ! CTI
249 sll %g1, 2, %l4 ! IEU0 Group
251 lduw [%l7 + %l4], %l7 ! Load
252 4: mov %i2, %o2 ! IEU0 Group
253 ldx [%g6 + TI_FLAGS], %l0 ! Load
256 mov %i4, %o4 ! IEU0 Group
257 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT|_TIF_NOHZ), %g0
258 bne,pn %icc, linux_syscall_trace ! CTI Group
260 2: call %l7 ! CTI Group brk forced
264 3: stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
266 ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %g3
267 mov %ulo(TSTATE_XCARRY | TSTATE_ICARRY), %g2
270 cmp %o0, -ERESTART_RESTARTBLOCK
272 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT|_TIF_NOHZ), %g0
273 ldx [%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc
276 /* System call success, clear Carry condition code. */
279 stx %g3, [%sp + PTREGS_OFF + PT_V9_TSTATE]
280 bne,pn %icc, linux_syscall_trace2
281 add %l1, 0x4, %l2 ! npc = npc+4
282 stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC]
284 stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
287 /* Check if force_successful_syscall_return()
290 ldub [%g6 + TI_SYS_NOERROR], %l2
292 ldx [%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc
293 /* System call failure, set Carry condition code.
294 * Also, get abs(errno) to return to the process.
297 stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
301 linux_syscall_trace2:
302 call syscall_trace_leave
303 add %sp, PTREGS_OFF, %o0
304 stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC]
306 stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC]