1 /* SunOS's execv() call only specifies the argv argument, the
2 * environment settings are the same as the calling processes.
5 sethi %hi(sparc_execve), %g1
6 ba,pt %xcc, execve_merge
7 or %g1, %lo(sparc_execve), %g1
11 stx %g0, [%sp + PTREGS_OFF + PT_V9_I2]
13 sethi %hi(sparc32_execve), %g1
14 or %g1, %lo(sparc32_execve), %g1
20 add %sp, PTREGS_OFF, %o0
24 ba,pt %xcc, sys_sparc_pipe_real
25 add %sp, PTREGS_OFF, %o0
27 ba,pt %xcc, c_sys_nis_syscall
28 add %sp, PTREGS_OFF, %o0
30 ba,pt %xcc, sparc_memory_ordering
31 add %sp, PTREGS_OFF, %o1
33 ba,pt %xcc, do_sigaltstack
34 add %i6, STACK_BIAS, %o2
37 ba,pt %xcc, do_sys32_sigstack
40 ba,pt %xcc, do_sys32_sigaltstack
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), %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
111 .globl ret_from_syscall
113 /* Clear current_thread_info()->new_child. */
114 stb %g0, [%g6 + TI_NEW_CHILD]
115 ldx [%g6 + TI_FLAGS], %l0
118 ba,pt %xcc, ret_sys_call
119 ldx [%sp + PTREGS_OFF + PT_V9_I0], %o0
121 .globl sparc_exit_group
122 .type sparc_exit_group,#function
124 sethi %hi(sys_exit_group), %g7
126 or %g7, %lo(sys_exit_group), %g7
127 .size sparc_exit_group,.-sparc_exit_group
130 .type sparc_exit,#function
132 sethi %hi(sys_exit), %g7
133 or %g7, %lo(sys_exit), %g7
135 wrpr %g2, PSTATE_IE, %pstate
139 wrpr %g3, 0x0, %cansave
140 wrpr %g0, 0x0, %otherwin
141 wrpr %g2, 0x0, %pstate
143 stb %g0, [%g6 + TI_WSAVED]
144 .size sparc_exit,.-sparc_exit
146 linux_sparc_ni_syscall:
147 sethi %hi(sys_ni_syscall), %l7
149 or %l7, %lo(sys_ni_syscall), %l7
151 linux_syscall_trace32:
152 call syscall_trace_enter
153 add %sp, PTREGS_OFF, %o0
164 call syscall_trace_enter
165 add %sp, PTREGS_OFF, %o0
176 /* Linux 32-bit system calls enter here... */
178 .globl linux_sparc_syscall32
179 linux_sparc_syscall32:
180 /* Direct access to user regs, much faster. */
181 cmp %g1, NR_syscalls ! IEU1 Group
182 bgeu,pn %xcc, linux_sparc_ni_syscall ! CTI
183 srl %i0, 0, %o0 ! IEU0
184 sll %g1, 2, %l4 ! IEU0 Group
185 srl %i4, 0, %o4 ! IEU1
186 lduw [%l7 + %l4], %l7 ! Load
187 srl %i1, 0, %o1 ! IEU0 Group
188 ldx [%g6 + TI_FLAGS], %l0 ! Load
190 srl %i5, 0, %o5 ! IEU1
191 srl %i2, 0, %o2 ! IEU0 Group
192 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %g0
193 bne,pn %icc, linux_syscall_trace32 ! CTI
195 call %l7 ! CTI Group brk forced
196 srl %i3, 0, %o3 ! IEU0
199 /* Linux native system calls enter here... */
201 .globl linux_sparc_syscall
203 /* Direct access to user regs, much faster. */
204 cmp %g1, NR_syscalls ! IEU1 Group
205 bgeu,pn %xcc, linux_sparc_ni_syscall ! CTI
207 sll %g1, 2, %l4 ! IEU0 Group
209 lduw [%l7 + %l4], %l7 ! Load
210 4: mov %i2, %o2 ! IEU0 Group
211 ldx [%g6 + TI_FLAGS], %l0 ! Load
214 mov %i4, %o4 ! IEU0 Group
215 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %g0
216 bne,pn %icc, linux_syscall_trace ! CTI Group
218 2: call %l7 ! CTI Group brk forced
222 3: stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
224 ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %g3
226 mov %ulo(TSTATE_XCARRY | TSTATE_ICARRY), %g2
229 cmp %o0, -ERESTART_RESTARTBLOCK
231 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %g0
232 ldx [%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc
235 stb %g0, [%g6 + TI_SYS_NOERROR]
236 /* System call success, clear Carry condition code. */
239 stx %g3, [%sp + PTREGS_OFF + PT_V9_TSTATE]
240 bne,pn %icc, linux_syscall_trace2
241 add %l1, 0x4, %l2 ! npc = npc+4
242 stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC]
244 stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
247 /* Check if force_successful_syscall_return()
250 ldub [%g6 + TI_SYS_NOERROR], %l2
252 ldx [%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc
253 /* System call failure, set Carry condition code.
254 * Also, get abs(errno) to return to the process.
257 stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
261 linux_syscall_trace2:
262 call syscall_trace_leave
263 add %sp, PTREGS_OFF, %o0
264 stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC]
266 stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC]