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 .align 32 74sys_vfork: /* Under Linux, vfork and fork are just special cases of clone. */ 75 sethi %hi(0x4000 | 0x0100 | SIGCHLD), %o0 76 or %o0, %lo(0x4000 | 0x0100 | SIGCHLD), %o0 77 ba,pt %xcc, sys_clone 78sys_fork: 79 clr %o1 80 mov SIGCHLD, %o0 81sys_clone: 82 flushw 83 movrz %o1, %fp, %o1 84 mov 0, %o3 85 ba,pt %xcc, sparc_do_fork 86 add %sp, PTREGS_OFF, %o2 87 88 .globl ret_from_syscall 89ret_from_syscall: 90 /* Clear current_thread_info()->new_child. */ 91 stb %g0, [%g6 + TI_NEW_CHILD] 92 ldx [%g6 + TI_FLAGS], %l0 93 call schedule_tail 94 mov %g7, %o0 95 ba,pt %xcc, ret_sys_call 96 ldx [%sp + PTREGS_OFF + PT_V9_I0], %o0 97 98 .globl sparc_exit 99 .type sparc_exit,#function 100sparc_exit: 101 rdpr %pstate, %g2 102 wrpr %g2, PSTATE_IE, %pstate 103 rdpr %otherwin, %g1 104 rdpr %cansave, %g3 105 add %g3, %g1, %g3 106 wrpr %g3, 0x0, %cansave 107 wrpr %g0, 0x0, %otherwin 108 wrpr %g2, 0x0, %pstate 109 ba,pt %xcc, sys_exit 110 stb %g0, [%g6 + TI_WSAVED] 111 .size sparc_exit,.-sparc_exit 112 113linux_sparc_ni_syscall: 114 sethi %hi(sys_ni_syscall), %l7 115 ba,pt %xcc, 4f 116 or %l7, %lo(sys_ni_syscall), %l7 117 118linux_syscall_trace32: 119 call syscall_trace_enter 120 add %sp, PTREGS_OFF, %o0 121 brnz,pn %o0, 3f 122 mov -ENOSYS, %o0 123 srl %i0, 0, %o0 124 srl %i4, 0, %o4 125 srl %i1, 0, %o1 126 srl %i2, 0, %o2 127 ba,pt %xcc, 2f 128 srl %i3, 0, %o3 129 130linux_syscall_trace: 131 call syscall_trace_enter 132 add %sp, PTREGS_OFF, %o0 133 brnz,pn %o0, 3f 134 mov -ENOSYS, %o0 135 mov %i0, %o0 136 mov %i1, %o1 137 mov %i2, %o2 138 mov %i3, %o3 139 b,pt %xcc, 2f 140 mov %i4, %o4 141 142 143 /* Linux 32-bit system calls enter here... */ 144 .align 32 145 .globl linux_sparc_syscall32 146linux_sparc_syscall32: 147 /* Direct access to user regs, much faster. */ 148 cmp %g1, NR_syscalls ! IEU1 Group 149 bgeu,pn %xcc, linux_sparc_ni_syscall ! CTI 150 srl %i0, 0, %o0 ! IEU0 151 sll %g1, 2, %l4 ! IEU0 Group 152 srl %i4, 0, %o4 ! IEU1 153 lduw [%l7 + %l4], %l7 ! Load 154 srl %i1, 0, %o1 ! IEU0 Group 155 ldx [%g6 + TI_FLAGS], %l0 ! Load 156 157 srl %i5, 0, %o5 ! IEU1 158 srl %i2, 0, %o2 ! IEU0 Group 159 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %g0 160 bne,pn %icc, linux_syscall_trace32 ! CTI 161 mov %i0, %l5 ! IEU1 162 call %l7 ! CTI Group brk forced 163 srl %i3, 0, %o3 ! IEU0 164 ba,a,pt %xcc, 3f 165 166 /* Linux native system calls enter here... */ 167 .align 32 168 .globl linux_sparc_syscall 169linux_sparc_syscall: 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 mov %i0, %o0 ! IEU0 174 sll %g1, 2, %l4 ! IEU0 Group 175 mov %i1, %o1 ! IEU1 176 lduw [%l7 + %l4], %l7 ! Load 1774: mov %i2, %o2 ! IEU0 Group 178 ldx [%g6 + TI_FLAGS], %l0 ! Load 179 180 mov %i3, %o3 ! IEU1 181 mov %i4, %o4 ! IEU0 Group 182 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %g0 183 bne,pn %icc, linux_syscall_trace ! CTI Group 184 mov %i0, %l5 ! IEU0 1852: call %l7 ! CTI Group brk forced 186 mov %i5, %o5 ! IEU0 187 nop 188 1893: stx %o0, [%sp + PTREGS_OFF + PT_V9_I0] 190ret_sys_call: 191 ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %g3 192 ldx [%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc 193 sra %o0, 0, %o0 194 mov %ulo(TSTATE_XCARRY | TSTATE_ICARRY), %g2 195 sllx %g2, 32, %g2 196 197 /* Check if force_successful_syscall_return() 198 * was invoked. 199 */ 200 ldub [%g6 + TI_SYS_NOERROR], %l2 201 brnz,a,pn %l2, 80f 202 stb %g0, [%g6 + TI_SYS_NOERROR] 203 204 cmp %o0, -ERESTART_RESTARTBLOCK 205 bgeu,pn %xcc, 1f 206 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %l6 20780: 208 /* System call success, clear Carry condition code. */ 209 andn %g3, %g2, %g3 210 stx %g3, [%sp + PTREGS_OFF + PT_V9_TSTATE] 211 bne,pn %icc, linux_syscall_trace2 212 add %l1, 0x4, %l2 ! npc = npc+4 213 stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC] 214 ba,pt %xcc, rtrap 215 stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC] 216 2171: 218 /* System call failure, set Carry condition code. 219 * Also, get abs(errno) to return to the process. 220 */ 221 andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %l6 222 sub %g0, %o0, %o0 223 or %g3, %g2, %g3 224 stx %o0, [%sp + PTREGS_OFF + PT_V9_I0] 225 stx %g3, [%sp + PTREGS_OFF + PT_V9_TSTATE] 226 bne,pn %icc, linux_syscall_trace2 227 add %l1, 0x4, %l2 ! npc = npc+4 228 stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC] 229 230 b,pt %xcc, rtrap 231 stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC] 232linux_syscall_trace2: 233 call syscall_trace_leave 234 add %sp, PTREGS_OFF, %o0 235 stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC] 236 ba,pt %xcc, rtrap 237 stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC] 238