libgloss/nds32/vh.h

   1 #ifndef _VH_H
   2 #define _VH_H
   3
   4 /*
   5 BREAK #SWID definition:
   6 0x00 – 0x1F: Free to use
   7 0x20 – 0x1FF: Reserved for EX9
   8 0x0200 – 0x7EFF: Free to use
   9 0x7F00 – 0x7FFF: Reserved for virtual hosting
  10 */
  11 /* These are #SWID defined for Virtual Hosting. */
  12 #define VH_FOPEN        0x7F00
  13 #define VH_FREOPEN      0x7F01
  14 #define VH_FCLOSE       0x7F02
  15 #define VH_FFLUSH       0x7F03
  16 #define VH_FREAD        0x7F04
  17 #define VH_FWRITE       0x7F05
  18 #define VH_FGETC        0x7F06
  19 #define VH_FGETS        0x7F07
  20 #define VH_FPUTC        0x7F08
  21 #define VH_FPUTS        0x7F09
  22 #define VH_UNGETC       0x7F0A
  23 #define VH_FTELL        0x7F0B
  24 #define VH_FSEEK        0x7F0C
  25 #define VH_REWIND       0x7F0D
  26 #define VH_CLEARERR     0x7F0E
  27 #define VH_FEOF         0x7F0F
  28 #define VH_FERROR       0x7F10
  29 #define VH_REMOVE       0x7F11
  30 #define VH_TMPFILE      0x7F12
  31 /* From here, define Low-level routines. */
  32 #define VH_EXIT         0x7F20
  33 #define VH_OPEN         0x7F21
  34 #define VH_CLOSE        0x7F22
  35 #define VH_READ         0x7F23
  36 #define VH_WRITE        0x7F24
  37 #define VH_LSEEK        0x7F25
  38 #define VH_UNLINK       0x7F26
  39 #define VH_RENAME       0x7F27
  40 #define VH_FSTAT        0x7F28
  41 #define VH_STAT         0x7F29
  42 #define VH_GETTIMEOFDAY 0x7F2A
  43 #define VH_ISATTY       0x7F2B
  44 #define VH_SYSTEM       0x7F2C
  45 #define VH_GETERR       0x7F2D  /* The method we get errno.  */
  46 #define VH_GETPID       0x7F2E
  47 #define VH_KILL         0x7F2F
  48 #define VH_TIMES        0x7F30
  49
  50
  51 /* Define macros that generate assembly output.
  52    Generate a System Call exception to notify GDB
  53    to handle this virtual I/O routine.  */
  54
  55 .macro TYPE0 name num
  56 /* If r0 is not NULL(0), set errno.  */
  57         .text
  58         .global \name
  59         .type   \name, @function
  60         .align  2
  61 \name:
  62         BREAK   \num            /* Generate_Exception(Breakpoint);  */
  63         bnez    $r0, 1f         /* Branch if success.
  64                                    r0 value is not NULL(0).  */
  65         BREAK   VH_GETERR
  66         l.w     $r15, _impure_ptr
  67         swi     $r0, [$r15]     /* Set errno.  */
  68         move    $r0, 0          /* Set return value as 0.  */
  69 1:
  70         ret
  71         .size   \name, .-\name
  72 .endm
  73
  74 .macro TYPE1 name num
  75 /* If r0 is EOF(-1), set errno.  */
  76         .text
  77         .global \name
  78         .type   \name, @function
  79         .align  2
  80 \name:
  81         BREAK   \num            /* Generate_Exception(Breakpoint);  */
  82         addi    $r15, $r0, 1
  83         bnezs8  1f              /* Branch if success.
  84                                    r0 value is EOF(-1).  */
  85         BREAK   VH_GETERR
  86         l.w     $r15, _impure_ptr
  87         swi     $r0, [$r15]     /* Set errno.  */
  88         move    $r0, -1         /* Set return value as -1.  */
  89 1:
  90         ret
  91         .size   \name, .-\name
  92 .endm
  93
  94 .macro TYPE2 name num
  95 /* If r0 is less than r2, set errno.  */
  96         .text
  97         .global \name
  98         .type   \name, @function
  99         .align  2
 100 \name:
 101         BREAK   \num            /* Generate_Exception(Breakpoint);  */
 102         slt     $r15, $r0, $r2  /* If r15 is set, set errno.  */
 103         beqzs8  1f              /* Branch if success.
 104                                    r15 is zero.  */
 105         move    $r4, $r0        /* Keep return value r0.  */
 106         BREAK   VH_GETERR
 107         l.w     $r15, _impure_ptr
 108         swi     $r0, [$r15]     /* Set errno.  */
 109         move    $r0, $r4        /* Restore r0.  */
 110 1:
 111         ret
 112         .size   \name, .-\name
 113 .endm
 114
 115 .macro TYPE3 name num
 116 /* No errors are defined.  */
 117         .text
 118         .global \name
 119         .type   \name, @function
 120         .align  2
 121 \name:
 122         BREAK   \num            /* Generate_Exception(Breakpoint);  */
 123         ret
 124         .size   \name, .-\name
 125 .endm
 126 #endif /* _VH_H */