sdcc/support/regression/tests/bug-3741.c

   1 /** bug-3741.c: A segfault at compile time that only happens on some systems?
   2 */
   3
   4 #include <testfwk.h>
   5
   6 #define PRN_TILE_WIDTH          20
   7
   8 #if defined(__SDCC_z80) || defined(SDCC_sm83)
   9 #define PR __preserves_regs(b, c, h, l)
  10 #else
  11 #define PR
  12 #define __banked
  13 #endif
  14
  15 void mymemset(void *s, unsigned char c, unsigned int n);
  16 unsigned char * get_xy(unsigned char x, unsigned char y);
  17 unsigned char get_byte(unsigned char * addr) PR;
  18 void vmemcpy(unsigned char *dest, unsigned char *sour, unsigned int len);
  19
  20 unsigned char * _VRAM8000 = (__xdata unsigned char *)0x8000;
  21 unsigned char * _VRAM9000 = (__xdata unsigned char *)0x9000;
  22
  23 unsigned char some_func(unsigned char sx, unsigned char sy, unsigned char sw, unsigned char sh, unsigned char centered) __banked {
  24
  25     unsigned char tile_data[16], rows = ((sh & 0x01) ? (sh + 1) : sh), x_ofs = (centered) ? ((PRN_TILE_WIDTH - sw) >> 1) : 0;
  26
  27     for (unsigned char y = 0; y != rows; y++) {
  28         unsigned char * map_addr = get_xy(sx, y + sy);
  29         for (unsigned char x = 0; x != PRN_TILE_WIDTH; x++) {
  30             if ((x >= x_ofs) && (x < (x_ofs + sw)) && (y < sh))  {
  31                 unsigned char tile = get_byte(map_addr++);
  32                 unsigned char * source = (((y + sy) > 11) || (tile > 127)) ? _VRAM8000 : _VRAM9000;
  33                 vmemcpy(tile_data, source + ((unsigned int)tile << 4), sizeof(tile_data));
  34             }
  35             else mymemset(tile_data, 0x00, sizeof(tile_data));
  36         }
  37     }
  38     return 0x01;
  39 }
  40
  41 void
  42 testBug (void)
  43 {
  44 }
  45
  46 void mymemset(void *s, unsigned char c, unsigned int n)
  47 {
  48     (void)s;
  49     (void)c;
  50     (void)n;
  51 }
  52
  53 unsigned char * get_xy(unsigned char x, unsigned char y)
  54 {
  55     (void)x;
  56     (void)y;
  57     return(0);
  58 }
  59
  60 unsigned char get_byte(unsigned char * addr) PR
  61 {
  62     (void)addr;
  63     return(0);
  64 }
  65
  66 void vmemcpy(unsigned char *dest, unsigned char *sour, unsigned int len)
  67 {
  68     (void)dest;
  69     (void)sour;
  70     (void)len;
  71 }
  72