David S. Miller | 6eda3a7 | 2008-04-28 00:47:20 -0700 | [diff] [blame] | 1 | /* SunOS's execv() call only specifies the argv argument, the |
| 2 | * environment settings are the same as the calling processes. |
| 3 | */ |
| 4 | sys_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 |
| 10 | sunos_execv: |
| 11 | stx %g0, [%sp + PTREGS_OFF + PT_V9_I2] |
| 12 | sys32_execve: |
| 13 | sethi %hi(sparc32_execve), %g1 |
| 14 | or %g1, %lo(sparc32_execve), %g1 |
| 15 | #endif |
| 16 | |
| 17 | execve_merge: |
| 18 | flushw |
| 19 | jmpl %g1, %g0 |
| 20 | add %sp, PTREGS_OFF, %o0 |
| 21 | |
| 22 | .align 32 |
Heiko Carstens | 1134723 | 2009-01-14 14:13:56 +0100 | [diff] [blame] | 23 | sys_sparc_pipe: |
David S. Miller | e426501 | 2009-01-19 21:11:27 -0800 | [diff] [blame] | 24 | ba,pt %xcc, sys_sparc_pipe_real |
David S. Miller | 6eda3a7 | 2008-04-28 00:47:20 -0700 | [diff] [blame] | 25 | add %sp, PTREGS_OFF, %o0 |
| 26 | sys_nis_syscall: |
| 27 | ba,pt %xcc, c_sys_nis_syscall |
| 28 | add %sp, PTREGS_OFF, %o0 |
| 29 | sys_memory_ordering: |
| 30 | ba,pt %xcc, sparc_memory_ordering |
| 31 | add %sp, PTREGS_OFF, %o1 |
| 32 | sys_sigaltstack: |
| 33 | ba,pt %xcc, do_sigaltstack |
| 34 | add %i6, STACK_BIAS, %o2 |
| 35 | #ifdef CONFIG_COMPAT |
| 36 | sys32_sigstack: |
| 37 | ba,pt %xcc, do_sys32_sigstack |
| 38 | mov %i6, %o2 |
| 39 | sys32_sigaltstack: |
| 40 | ba,pt %xcc, do_sys32_sigaltstack |
| 41 | mov %i6, %o2 |
| 42 | #endif |
| 43 | .align 32 |
| 44 | #ifdef CONFIG_COMPAT |
| 45 | sys32_sigreturn: |
| 46 | add %sp, PTREGS_OFF, %o0 |
| 47 | call do_sigreturn32 |
| 48 | add %o7, 1f-.-4, %o7 |
| 49 | nop |
| 50 | #endif |
| 51 | sys_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 |
| 57 | sys32_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 |
| 64 | 1: ldx [%g6 + TI_FLAGS], %l5 |
David S. Miller | c658ad1 | 2009-12-11 00:44:47 -0800 | [diff] [blame] | 65 | andcc %l5, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %g0 |
David S. Miller | 6eda3a7 | 2008-04-28 00:47:20 -0700 | [diff] [blame] | 66 | be,pt %icc, rtrap |
| 67 | nop |
David S. Miller | fe06cca | 2008-08-24 20:10:23 -0700 | [diff] [blame] | 68 | call syscall_trace_leave |
| 69 | add %sp, PTREGS_OFF, %o0 |
David S. Miller | 6eda3a7 | 2008-04-28 00:47:20 -0700 | [diff] [blame] | 70 | 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 |
| 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 |
| 101 | sys_fork: |
| 102 | clr %o1 |
| 103 | mov SIGCHLD, %o0 |
| 104 | sys_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 |
| 112 | ret_from_syscall: |
David S. Miller | c7d5a00 | 2010-03-03 08:08:49 -0800 | [diff] [blame] | 113 | /* Clear current_thread_info()->new_child. */ |
David S. Miller | 6eda3a7 | 2008-04-28 00:47:20 -0700 | [diff] [blame] | 114 | stb %g0, [%g6 + TI_NEW_CHILD] |
| 115 | ldx [%g6 + TI_FLAGS], %l0 |
| 116 | call schedule_tail |
| 117 | mov %g7, %o0 |
David S. Miller | c7d5a00 | 2010-03-03 08:08:49 -0800 | [diff] [blame] | 118 | ba,pt %xcc, ret_sys_call |
David S. Miller | 6eda3a7 | 2008-04-28 00:47:20 -0700 | [diff] [blame] | 119 | ldx [%sp + PTREGS_OFF + PT_V9_I0], %o0 |
| 120 | |
| 121 | .globl sparc_exit |
| 122 | .type sparc_exit,#function |
| 123 | sparc_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 | |
| 136 | linux_sparc_ni_syscall: |
| 137 | sethi %hi(sys_ni_syscall), %l7 |
| 138 | ba,pt %xcc, 4f |
| 139 | or %l7, %lo(sys_ni_syscall), %l7 |
| 140 | |
| 141 | linux_syscall_trace32: |
David S. Miller | fe06cca | 2008-08-24 20:10:23 -0700 | [diff] [blame] | 142 | call syscall_trace_enter |
| 143 | add %sp, PTREGS_OFF, %o0 |
Roland McGrath | 73ccefa | 2008-07-27 00:30:50 -0700 | [diff] [blame] | 144 | brnz,pn %o0, 3f |
| 145 | mov -ENOSYS, %o0 |
David S. Miller | 6eda3a7 | 2008-04-28 00:47:20 -0700 | [diff] [blame] | 146 | 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 | |
| 153 | linux_syscall_trace: |
David S. Miller | fe06cca | 2008-08-24 20:10:23 -0700 | [diff] [blame] | 154 | call syscall_trace_enter |
| 155 | add %sp, PTREGS_OFF, %o0 |
Roland McGrath | 73ccefa | 2008-07-27 00:30:50 -0700 | [diff] [blame] | 156 | brnz,pn %o0, 3f |
| 157 | mov -ENOSYS, %o0 |
David S. Miller | 6eda3a7 | 2008-04-28 00:47:20 -0700 | [diff] [blame] | 158 | 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 |
| 169 | linux_sparc_syscall32: |
| 170 | /* Direct access to user regs, much faster. */ |
David S. Miller | c658ad1 | 2009-12-11 00:44:47 -0800 | [diff] [blame] | 171 | cmp %g1, NR_syscalls ! IEU1 Group |
David S. Miller | 6eda3a7 | 2008-04-28 00:47:20 -0700 | [diff] [blame] | 172 | 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. Miller | c658ad1 | 2009-12-11 00:44:47 -0800 | [diff] [blame] | 182 | andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %g0 |
David S. Miller | 6eda3a7 | 2008-04-28 00:47:20 -0700 | [diff] [blame] | 183 | 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 |
| 192 | linux_sparc_syscall: |
| 193 | /* Direct access to user regs, much faster. */ |
David S. Miller | c658ad1 | 2009-12-11 00:44:47 -0800 | [diff] [blame] | 194 | cmp %g1, NR_syscalls ! IEU1 Group |
David S. Miller | 6eda3a7 | 2008-04-28 00:47:20 -0700 | [diff] [blame] | 195 | 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 |
| 200 | 4: 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. Miller | c658ad1 | 2009-12-11 00:44:47 -0800 | [diff] [blame] | 205 | andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %g0 |
David S. Miller | 6eda3a7 | 2008-04-28 00:47:20 -0700 | [diff] [blame] | 206 | bne,pn %icc, linux_syscall_trace ! CTI Group |
| 207 | mov %i0, %l5 ! IEU0 |
| 208 | 2: call %l7 ! CTI Group brk forced |
| 209 | mov %i5, %o5 ! IEU0 |
| 210 | nop |
| 211 | |
| 212 | 3: stx %o0, [%sp + PTREGS_OFF + PT_V9_I0] |
| 213 | ret_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. Miller | c658ad1 | 2009-12-11 00:44:47 -0800 | [diff] [blame] | 229 | andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %l6 |
David S. Miller | 6eda3a7 | 2008-04-28 00:47:20 -0700 | [diff] [blame] | 230 | 80: |
| 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 | |
| 240 | 1: |
| 241 | /* System call failure, set Carry condition code. |
| 242 | * Also, get abs(errno) to return to the process. |
| 243 | */ |
David S. Miller | c658ad1 | 2009-12-11 00:44:47 -0800 | [diff] [blame] | 244 | andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %l6 |
David S. Miller | 6eda3a7 | 2008-04-28 00:47:20 -0700 | [diff] [blame] | 245 | 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] |
| 255 | linux_syscall_trace2: |
David S. Miller | fe06cca | 2008-08-24 20:10:23 -0700 | [diff] [blame] | 256 | call syscall_trace_leave |
| 257 | add %sp, PTREGS_OFF, %o0 |
David S. Miller | 6eda3a7 | 2008-04-28 00:47:20 -0700 | [diff] [blame] | 258 | stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC] |
| 259 | ba,pt %xcc, rtrap |
| 260 | stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC] |