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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 | /* SPDX-License-Identifier: GPL-2.0 */ /* SunOS's execv() call only specifies the argv argument, the * environment settings are the same as the calling processes. */ sys64_execve: set sys_execve, %g1 jmpl %g1, %g0 flushw sys64_execveat: set sys_execveat, %g1 jmpl %g1, %g0 flushw #ifdef CONFIG_COMPAT sunos_execv: mov %g0, %o2 sys32_execve: set compat_sys_execve, %g1 jmpl %g1, %g0 flushw sys32_execveat: set compat_sys_execveat, %g1 jmpl %g1, %g0 flushw #endif .align 32 #ifdef CONFIG_COMPAT sys32_sigstack: ba,pt %xcc, do_sys32_sigstack mov %i6, %o2 #endif .align 32 #ifdef CONFIG_COMPAT sys32_sigreturn: add %sp, PTREGS_OFF, %o0 call do_sigreturn32 add %o7, 1f-.-4, %o7 nop #endif sys_rt_sigreturn: add %sp, PTREGS_OFF, %o0 call do_rt_sigreturn add %o7, 1f-.-4, %o7 nop #ifdef CONFIG_COMPAT sys32_rt_sigreturn: add %sp, PTREGS_OFF, %o0 call do_rt_sigreturn32 add %o7, 1f-.-4, %o7 nop #endif .align 32 1: ldx [%g6 + TI_FLAGS], %l5 andcc %l5, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT|_TIF_NOHZ), %g0 be,pt %icc, rtrap nop call syscall_trace_leave add %sp, PTREGS_OFF, %o0 ba,pt %xcc, rtrap nop /* This is how fork() was meant to be done, 8 instruction entry. * * I questioned the following code briefly, let me clear things * up so you must not reason on it like I did. * * Know the fork_kpsr etc. we use in the sparc32 port? We don't * need it here because the only piece of window state we copy to * the child is the CWP register. Even if the parent sleeps, * we are safe because we stuck it into pt_regs of the parent * so it will not change. * * XXX This raises the question, whether we can do the same on * XXX sparc32 to get rid of fork_kpsr _and_ fork_kwim. The * XXX answer is yes. We stick fork_kpsr in UREG_G0 and * XXX fork_kwim in UREG_G1 (global registers are considered * XXX volatile across a system call in the sparc ABI I think * XXX if it isn't we can use regs->y instead, anyone who depends * XXX upon the Y register being preserved across a fork deserves * XXX to lose). * * In fact we should take advantage of that fact for other things * during system calls... */ .align 32 sys_vfork: flushw ba,pt %xcc, sparc_vfork add %sp, PTREGS_OFF, %o0 .align 32 sys_fork: flushw ba,pt %xcc, sparc_fork add %sp, PTREGS_OFF, %o0 .align 32 sys_clone: flushw ba,pt %xcc, sparc_clone add %sp, PTREGS_OFF, %o0 .globl ret_from_fork ret_from_fork: /* Clear current_thread_info()->new_child. */ stb %g0, [%g6 + TI_NEW_CHILD] call schedule_tail mov %g7, %o0 ldx [%sp + PTREGS_OFF + PT_V9_I0], %o0 brnz,pt %o0, ret_sys_call ldx [%g6 + TI_FLAGS], %l0 ldx [%sp + PTREGS_OFF + PT_V9_G1], %l1 call %l1 ldx [%sp + PTREGS_OFF + PT_V9_G2], %o0 ba,pt %xcc, ret_sys_call mov 0, %o0 .globl sparc_exit_group .type sparc_exit_group,#function sparc_exit_group: sethi %hi(sys_exit_group), %g7 ba,pt %xcc, 1f or %g7, %lo(sys_exit_group), %g7 .size sparc_exit_group,.-sparc_exit_group .globl sparc_exit .type sparc_exit,#function sparc_exit: sethi %hi(sys_exit), %g7 or %g7, %lo(sys_exit), %g7 1: rdpr %pstate, %g2 wrpr %g2, PSTATE_IE, %pstate rdpr %otherwin, %g1 rdpr %cansave, %g3 add %g3, %g1, %g3 wrpr %g3, 0x0, %cansave wrpr %g0, 0x0, %otherwin wrpr %g2, 0x0, %pstate jmpl %g7, %g0 stb %g0, [%g6 + TI_WSAVED] .size sparc_exit,.-sparc_exit linux_sparc_ni_syscall: sethi %hi(sys_ni_syscall), %l7 ba,pt %xcc, 4f or %l7, %lo(sys_ni_syscall), %l7 linux_syscall_trace32: call syscall_trace_enter add %sp, PTREGS_OFF, %o0 brnz,pn %o0, 3f mov -ENOSYS, %o0 /* Syscall tracing can modify the registers. */ ldx [%sp + PTREGS_OFF + PT_V9_G1], %g1 sethi %hi(sys_call_table32), %l7 ldx [%sp + PTREGS_OFF + PT_V9_I0], %i0 or %l7, %lo(sys_call_table32), %l7 ldx [%sp + PTREGS_OFF + PT_V9_I1], %i1 ldx [%sp + PTREGS_OFF + PT_V9_I2], %i2 ldx [%sp + PTREGS_OFF + PT_V9_I3], %i3 ldx [%sp + PTREGS_OFF + PT_V9_I4], %i4 ldx [%sp + PTREGS_OFF + PT_V9_I5], %i5 cmp %g1, NR_syscalls bgeu,pn %xcc, 3f mov -ENOSYS, %o0 sll %g1, 2, %l4 srl %i0, 0, %o0 lduw [%l7 + %l4], %l7 srl %i4, 0, %o4 srl %i1, 0, %o1 srl %i2, 0, %o2 ba,pt %xcc, 5f srl %i3, 0, %o3 linux_syscall_trace: call syscall_trace_enter add %sp, PTREGS_OFF, %o0 brnz,pn %o0, 3f mov -ENOSYS, %o0 /* Syscall tracing can modify the registers. */ ldx [%sp + PTREGS_OFF + PT_V9_G1], %g1 sethi %hi(sys_call_table64), %l7 ldx [%sp + PTREGS_OFF + PT_V9_I0], %i0 or %l7, %lo(sys_call_table64), %l7 ldx [%sp + PTREGS_OFF + PT_V9_I1], %i1 ldx [%sp + PTREGS_OFF + PT_V9_I2], %i2 ldx [%sp + PTREGS_OFF + PT_V9_I3], %i3 ldx [%sp + PTREGS_OFF + PT_V9_I4], %i4 ldx [%sp + PTREGS_OFF + PT_V9_I5], %i5 cmp %g1, NR_syscalls bgeu,pn %xcc, 3f mov -ENOSYS, %o0 sll %g1, 2, %l4 mov %i0, %o0 lduw [%l7 + %l4], %l7 mov %i1, %o1 mov %i2, %o2 mov %i3, %o3 b,pt %xcc, 2f mov %i4, %o4 /* Linux 32-bit system calls enter here... */ .align 32 .globl linux_sparc_syscall32 linux_sparc_syscall32: /* Direct access to user regs, much faster. */ cmp %g1, NR_syscalls ! IEU1 Group bgeu,pn %xcc, linux_sparc_ni_syscall ! CTI srl %i0, 0, %o0 ! IEU0 sll %g1, 2, %l4 ! IEU0 Group srl %i4, 0, %o4 ! IEU1 lduw [%l7 + %l4], %l7 ! Load srl %i1, 0, %o1 ! IEU0 Group ldx [%g6 + TI_FLAGS], %l0 ! Load srl %i3, 0, %o3 ! IEU0 srl %i2, 0, %o2 ! IEU0 Group andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT|_TIF_NOHZ), %g0 bne,pn %icc, linux_syscall_trace32 ! CTI mov %i0, %l5 ! IEU1 5: call %l7 ! CTI Group brk forced srl %i5, 0, %o5 ! IEU1 ba,pt %xcc, 3f sra %o0, 0, %o0 /* Linux native system calls enter here... */ .align 32 .globl linux_sparc_syscall linux_sparc_syscall: /* Direct access to user regs, much faster. */ cmp %g1, NR_syscalls ! IEU1 Group bgeu,pn %xcc, linux_sparc_ni_syscall ! CTI mov %i0, %o0 ! IEU0 sll %g1, 2, %l4 ! IEU0 Group mov %i1, %o1 ! IEU1 lduw [%l7 + %l4], %l7 ! Load 4: mov %i2, %o2 ! IEU0 Group ldx [%g6 + TI_FLAGS], %l0 ! Load mov %i3, %o3 ! IEU1 mov %i4, %o4 ! IEU0 Group andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT|_TIF_NOHZ), %g0 bne,pn %icc, linux_syscall_trace ! CTI Group mov %i0, %l5 ! IEU0 2: call %l7 ! CTI Group brk forced mov %i5, %o5 ! IEU0 nop 3: stx %o0, [%sp + PTREGS_OFF + PT_V9_I0] ret_sys_call: ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %g3 mov %ulo(TSTATE_XCARRY | TSTATE_ICARRY), %g2 sllx %g2, 32, %g2 cmp %o0, -ERESTART_RESTARTBLOCK bgeu,pn %xcc, 1f andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT|_TIF_NOHZ), %g0 ldx [%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc 2: /* System call success, clear Carry condition code. */ andn %g3, %g2, %g3 3: stx %g3, [%sp + PTREGS_OFF + PT_V9_TSTATE] bne,pn %icc, linux_syscall_trace2 add %l1, 0x4, %l2 ! npc = npc+4 stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC] ba,pt %xcc, rtrap stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC] 1: /* Check if force_successful_syscall_return() * was invoked. */ ldub [%g6 + TI_SYS_NOERROR], %l2 brnz,pn %l2, 2b ldx [%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc /* System call failure, set Carry condition code. * Also, get abs(errno) to return to the process. */ sub %g0, %o0, %o0 stx %o0, [%sp + PTREGS_OFF + PT_V9_I0] ba,pt %xcc, 3b or %g3, %g2, %g3 linux_syscall_trace2: call syscall_trace_leave add %sp, PTREGS_OFF, %o0 stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC] ba,pt %xcc, rtrap stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC] |