arch/sparc64/solaris/entry64.S

   1 /* $Id: entry64.S,v 1.7 2002/02/09 19:49:31 davem Exp $
   2  * entry64.S:  Solaris syscall emulation entry point.
   3  *
   4  * Copyright (C) 1996,1997,1998 Jakub Jelinek   (jj@sunsite.mff.cuni.cz)
   5  * Copyright (C) 1995,1997 David S. Miller (davem@caip.rutgers.edu)
   6  * Copyright (C) 1996 Miguel de Icaza      (miguel@nuclecu.unam.mx)
   7  */
   8
   9 #include <linux/errno.h>
  10
  11 #include <asm/head.h>
  12 #include <asm/asi.h>
  13 #include <asm/smp.h>
  14 #include <asm/ptrace.h>
  15 #include <asm/page.h>
  16 #include <asm/signal.h>
  17 #include <asm/pgtable.h>
  18 #include <asm/processor.h>
  19 #include <asm/thread_info.h>
  20
  21 #include "conv.h"
  22
  23 #define NR_SYSCALLS     256
  24
  25         .text
  26 solaris_syscall_trace:
  27         call            syscall_trace
  28          nop
  29         srl             %i0, 0, %o0
  30         mov             %i4, %o4
  31         srl             %i1, 0, %o1
  32         mov             %i5, %o5
  33         andcc           %l3, 1, %g0
  34         be,pt           %icc, 2f
  35          srl            %i2, 0, %o2
  36         b,pt            %xcc, 2f
  37          add            %sp, PTREGS_OFF, %o0
  38
  39 solaris_sucks:
  40 /* Solaris is a big system which needs to be able to do all the things
  41  * in Inf+1 different ways */
  42         add             %i6, 0x5c, %o0
  43         mov             %i0, %g1
  44         mov             %i1, %i0
  45         mov             %i2, %i1
  46         srl             %o0, 0, %o0
  47         mov             %i3, %i2
  48         movrz           %g1, 256, %g1 /* Ensure we don't loop forever */
  49         mov             %i4, %i3
  50         mov             %i5, %i4
  51         ba,pt           %xcc, solaris_sparc_syscall
  52 exen:    lduwa          [%o0] ASI_S, %i5
  53
  54 exenf:  ba,pt           %xcc, solaris_sparc_syscall
  55          clr            %i5
  56
  57 /* For shared binaries, binfmt_elf32 already sets up personality
  58    and exec_domain. This is to handle static binaries as well */
  59 solaris_reg:
  60         call            solaris_register
  61          nop
  62         ba,pt           %xcc, 1f
  63          mov            %i4, %o4
  64
  65 linux_syscall_for_solaris:
  66         sethi           %hi(sys_call_table32), %l6
  67         or              %l6, %lo(sys_call_table32), %l6
  68         sll             %l3, 2, %l4
  69         ba,pt           %xcc, 10f
  70          lduw           [%l6 + %l4], %l3
  71
  72         /* Solaris system calls enter here... */
  73         .align  32
  74         .globl  solaris_sparc_syscall, entry64_personality_patch
  75 solaris_sparc_syscall:
  76 entry64_personality_patch:
  77         ldub            [%g4 + 0x0], %l0
  78         cmp             %g1, 255
  79         bg,pn           %icc, solaris_unimplemented
  80          srl            %g1, 0, %g1
  81         sethi           %hi(solaris_sys_table), %l7
  82         or              %l7, %lo(solaris_sys_table), %l7
  83         brz,pn          %g1, solaris_sucks
  84          mov            %i4, %o4
  85         sll             %g1, 2, %l4
  86         cmp             %l0, 1
  87         bne,pn          %icc, solaris_reg
  88 1:       srl            %i0, 0, %o0
  89         lduw            [%l7 + %l4], %l3
  90         srl             %i1, 0, %o1
  91         ldx             [%g6 + TI_FLAGS], %l5
  92         cmp             %l3, NR_SYSCALLS
  93         bleu,a,pn       %xcc, linux_syscall_for_solaris
  94          nop
  95         andcc           %l3, 1, %g0
  96         bne,a,pn        %icc, 10f
  97          add            %sp, PTREGS_OFF, %o0
  98 10:     srl             %i2, 0, %o2
  99         mov             %i5, %o5
 100         andn            %l3, 3, %l7
 101         andcc           %l5, _TIF_SYSCALL_TRACE, %g0
 102         bne,pn          %icc, solaris_syscall_trace
 103          mov            %i0, %l5
 104 2:      call            %l7
 105          srl            %i3, 0, %o3
 106 ret_from_solaris:
 107         stx             %o0, [%sp + PTREGS_OFF + PT_V9_I0]
 108         ldx             [%g6 + TI_FLAGS], %l6
 109         sra             %o0, 0, %o0
 110         mov             %ulo(TSTATE_XCARRY | TSTATE_ICARRY), %g2
 111         ldx             [%sp + PTREGS_OFF + PT_V9_TSTATE], %g3
 112         cmp             %o0, -ERESTART_RESTARTBLOCK
 113         sllx            %g2, 32, %g2
 114         bgeu,pn         %xcc, 1f
 115          andcc          %l6, _TIF_SYSCALL_TRACE, %l6
 116
 117         /* System call success, clear Carry condition code. */
 118         andn            %g3, %g2, %g3
 119         stx             %g3, [%sp + PTREGS_OFF + PT_V9_TSTATE]
 120         bne,pn          %icc, solaris_syscall_trace2
 121          ldx            [%sp + PTREGS_OFF + PT_V9_TNPC], %l1
 122         andcc           %l1, 1, %g0
 123         bne,pn          %icc, 2f
 124          clr            %l6
 125         add             %l1, 0x4, %l2
 126         stx             %l1, [%sp + PTREGS_OFF + PT_V9_TPC]      ! pc = npc
 127         call            rtrap
 128          stx            %l2, [%sp + PTREGS_OFF + PT_V9_TNPC] !npc = npc+4
 129
 130         /* When tnpc & 1, this comes from setcontext and we don't want to advance pc */
 131 2:      andn            %l1, 3, %l1
 132         call            rtrap
 133          stx            %l1, [%sp + PTREGS_OFF + PT_V9_TNPC] !npc = npc&~3
 134
 135 1:
 136         /* System call failure, set Carry condition code.
 137          * Also, get abs(errno) to return to the process.
 138          */
 139         sub             %g0, %o0, %o0
 140         or              %g3, %g2, %g3
 141         cmp             %o0, ERANGE     /* 0-ERANGE are identity mapped */
 142         bleu,pt         %icc, 1f
 143          cmp            %o0, EMEDIUMTYPE
 144         bgu,pn          %icc, 1f
 145          sethi          %hi(solaris_err_table), %l6
 146         sll             %o0, 2, %o0
 147         or              %l6, %lo(solaris_err_table), %l6
 148         ldsw            [%l6 + %o0], %o0
 149 1:      stx             %o0, [%sp + PTREGS_OFF + PT_V9_I0]
 150         mov             1, %l6
 151         stx             %g3, [%sp + PTREGS_OFF + PT_V9_TSTATE]
 152         bne,pn          %icc, solaris_syscall_trace2
 153          ldx            [%sp + PTREGS_OFF + PT_V9_TNPC], %l1
 154         andcc           %l1, 1, %g0
 155         bne,pn          %icc, 2b
 156          add            %l1, 0x4, %l2
 157         stx             %l1, [%sp + PTREGS_OFF + PT_V9_TPC]  ! pc = npc
 158         call            rtrap
 159          stx            %l2, [%sp + PTREGS_OFF + PT_V9_TNPC] !npc = npc+4
 160
 161 solaris_syscall_trace2:
 162         call            syscall_trace
 163          add            %l1, 0x4, %l2                   /* npc = npc+4 */
 164         andcc           %l1, 1, %g0
 165         bne,pn          %icc, 2b
 166          nop
 167         stx             %l1, [%sp + PTREGS_OFF + PT_V9_TPC]
 168         call            rtrap
 169          stx            %l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
 170
 171         /* This one is tricky, so that's why we do it in assembly */
 172         .globl          solaris_sigsuspend
 173 solaris_sigsuspend:
 174         call            do_sol_sigsuspend
 175          nop
 176         brlz,pn         %o0, ret_from_solaris
 177          nop
 178         call            sys_sigsuspend
 179          stx            %o0, [%sp + PTREGS_OFF + PT_V9_I0]
 180
 181         .globl          solaris_getpid
 182 solaris_getpid:
 183         call            sys_getppid
 184          nop
 185         call            sys_getpid
 186          stx            %o0, [%sp + PTREGS_OFF + PT_V9_I1]
 187         b,pt            %xcc, ret_from_solaris
 188          nop
 189
 190         .globl  solaris_getuid
 191 solaris_getuid:
 192         call            sys_geteuid
 193          nop
 194         call            sys_getuid
 195          stx            %o1, [%sp + PTREGS_OFF + PT_V9_I1]
 196         b,pt            %xcc, ret_from_solaris
 197          nop
 198
 199         .globl  solaris_getgid
 200 solaris_getgid:
 201         call            sys_getegid
 202          nop
 203         call            sys_getgid
 204          stx            %o1, [%sp + PTREGS_OFF + PT_V9_I1]
 205         b,pt            %xcc, ret_from_solaris
 206          nop
 207
 208         .globl          solaris_unimplemented
 209 solaris_unimplemented:
 210         call            do_sol_unimplemented
 211          add            %sp, PTREGS_OFF, %o0
 212         ba,pt           %xcc, ret_from_solaris
 213          nop
 214
 215         .section        __ex_table,#alloc
 216         .align          4
 217         .word           exen, exenf
 218