src/org/ibex/nestedvm/support.s

   1 #include "syscalls.h"
   2
   3 #define zero $0
   4 #define v0 $2
   5 #define v1 $3
   6 #define a0 $4
   7 #define a1 $5
   8 #define a2 $6
   9 #define a3 $7
  10 #define t0 $8
  11 #define t1 $9
  12 #define t2 $10
  13 #define t3 $11
  14 #define sp $29
  15 #define ra $31
  16
  17 /* We intentionally don't take advantage of delay slots because
  18    the compiler removes them anyway */
  19
  20 .set noreorder;
  21
  22 #define SYSCALL(name) SYSCALL2(name,SYS_##name)
  23 #define SYSCALL2(name,number)  \
  24     .section .text.name,"ax",@progbits; \
  25     .align 2;       \
  26     .globl name;    \
  27     .ent name;      \
  28 name:               \
  29     li v0, number;  \
  30     syscall;        \
  31     j ra;           \
  32     nop;            \
  33     .end name;
  34
  35 #define SYSCALL_R(name) SYSCALL_R2(_##name##_r,SYS_##name)
  36 #define SYSCALL_R_LONG(name) SYSCALL_R2_LONG(_##name##_r,SYS_##name)
  37
  38 #define SYSCALL_R2(name,number) \
  39     SYSCALL_R2_BEG(name,number) \
  40     SYSCALL_R2_END(name)
  41
  42
  43 #define SYSCALL_R2_LONG(name,number)  \
  44     SYSCALL_R2_BEG(name,number) \
  45     lw a3,16(sp); \
  46     lw t0,20(sp); \
  47     lw t1,24(sp); \
  48     SYSCALL_R2_END(name)
  49
  50 #define SYSCALL_R2_BEG(name,number) \
  51     .section .text.name,"ax",@progbits; \
  52     .align 2;                  \
  53     .globl name;               \
  54     .ent name;                 \
  55 name:                          \
  56     li v0, number;             \
  57     move t2, a0;               \
  58     move a0, a1;               \
  59     move a1, a2;               \
  60     move a2, a3;               \
  61
  62 #define SYSCALL_R2_END(name) \
  63     syscall;                   \
  64     addu t3,v0,255;            \
  65     sltu t3,t3,255;            \
  66     bne t3,zero,$L##name##_errno;\
  67     nop;                       \
  68     j ra;                      \
  69     nop;                       \
  70 $L##name##_errno:              \
  71     move a0, t2;               \
  72     move a1, v0;               \
  73     j _syscall_set_errno;      \
  74     nop;                       \
  75     .end name;
  76
  77
  78     .align   2
  79     .globl   _call_helper
  80     .ent     _call_helper
  81 _call_helper:
  82     subu sp,sp,32
  83
  84     /* addr */
  85     move $2,$4
  86
  87     /* args 1-4 */
  88     move $4,$5
  89     move $5,$6
  90     move $6,$7
  91     move $7,$16
  92
  93     /* args 5 and 6 */
  94     sw $17,16(sp)
  95     sw $18,20(sp)
  96
  97     /* call the func */
  98     jal $31,$2
  99     nop
 100
 101     move $3,$2
 102     li $2,SYS_pause
 103     syscall
 104
 105     /* shouldn't get here */
 106     li $2,SYS_exit
 107     li $3,1
 108     syscall
 109
 110     .end _call_helper
 111
 112 SYSCALL2(_exit,SYS_exit)
 113 SYSCALL2(_pause,SYS_pause)
 114 SYSCALL_R(open)
 115 SYSCALL_R(close)
 116 SYSCALL_R(read)
 117 SYSCALL_R(write)
 118 SYSCALL_R(sbrk)
 119 SYSCALL_R(fstat)
 120 SYSCALL_R(lseek)
 121 SYSCALL_R(kill)
 122 SYSCALL_R(getpid)
 123 SYSCALL2(_call_java,SYS_calljava)
 124 SYSCALL_R(stat)
 125 SYSCALL_R(gettimeofday)
 126 SYSCALL(sleep)
 127 SYSCALL_R(times)
 128 SYSCALL_R(mkdir)
 129 SYSCALL(getpagesize)
 130 SYSCALL_R(unlink)
 131 SYSCALL_R(utime)
 132 SYSCALL_R(chdir)
 133 SYSCALL_R(pipe)
 134 SYSCALL_R(dup2)
 135 SYSCALL_R(fork)
 136 SYSCALL_R(waitpid)
 137 SYSCALL_R2(__getcwd_r,SYS_getcwd)
 138 SYSCALL_R2(__execve_r,SYS_exec)
 139 SYSCALL_R(fcntl)
 140 SYSCALL_R(rmdir)
 141 SYSCALL_R(sysconf)
 142 SYSCALL_R(readlink)
 143 SYSCALL_R(lstat)
 144 SYSCALL_R(symlink)
 145 SYSCALL_R(link)
 146 SYSCALL_R_LONG(getdents)
 147 SYSCALL(memcpy)
 148 SYSCALL(memset)
 149 SYSCALL_R(dup)
 150 SYSCALL_R(vfork)
 151 SYSCALL_R(chroot)
 152 SYSCALL_R(mknod)
 153 SYSCALL_R(lchown)
 154 SYSCALL_R(ftruncate)
 155 SYSCALL_R(usleep)
 156 SYSCALL(getppid)
 157 SYSCALL_R(mkfifo)
 158 SYSCALL_R(klogctl)
 159 SYSCALL_R(realpath)
 160 SYSCALL_R2_LONG(__sysctl_r,SYS_sysctl)
 161 SYSCALL_R(getpriority)
 162 SYSCALL_R(setpriority)
 163 SYSCALL_R(socket)
 164 SYSCALL_R(connect)
 165 SYSCALL_R2(__resolve_hostname_r,SYS_resolve_hostname)
 166 SYSCALL_R(accept)
 167 SYSCALL_R_LONG(setsockopt)
 168 SYSCALL_R_LONG(getsockopt)
 169 SYSCALL_R(listen)
 170 SYSCALL_R(bind)
 171 SYSCALL_R(shutdown)