examples/x86-testapp.c

   1 #include <stddef.h>
   2 #include <stdio.h>
   3 #include <string.h>
   4
   5 void *func[8], **pfunc;
   6
   7 typedef struct xxx xxx_t;
   8 struct xxx {
   9         int dummy;
  10         void **pfunc;
  11 } q;
  12
  13 #define XF_strcpy 3
  14 #define XF_printf 4
  15
  16 #define LABEL(x)                                        \
  17 asm volatile (                                          \
  18
  19 #if defined(__i386__)
  20 #define EXPORT_FUNC(x)                                  \
  21 asm volatile (                                          \
  22 "       .globl mon_" #x "\n"                            \
  23 "mon_" #x ":\n"                                         \
  24 "       movl    %0, %%eax\n"                            \
  25 "       movl    pfunc, %%ecx\n"                         \
  26 "       jmp     *(%%ecx,%%eax)\n"                       \
  27         : : "i"(XF_ ## x * sizeof(void *)) : "eax", "ecx");
  28 #elif defined(__powerpc__)
  29 #define EXPORT_FUNC(x)                                  \
  30 asm volatile (                                          \
  31 "       .globl mon_" #x "\n"                            \
  32 "mon_" #x ":\n"                                         \
  33 "       lwz     %%r11, %0(%%r2)\n"                      \
  34 "       lwz     %%r11, %1(%%r11)\n"                     \
  35 "       mtctr   %%r11\n"                                \
  36 "       bctr\n"                                 \
  37         : : "i"(offsetof(xxx_t, pfunc)), "i"(XF_ ## x * sizeof(void *)) : "r11", "r2");
  38 #elif defined(__arm__)
  39 #define EXPORT_FUNC(x)                                  \
  40 asm volatile (                                          \
  41 "       .globl mon_" #x "\n"                            \
  42 "mon_" #x ":\n"                                         \
  43 "       ldr     ip, [r8, %0]\n"                         \
  44 "       ldr     pc, [ip, %1]\n"                         \
  45         : : "i"(offsetof(xxx_t, pfunc)), "i"(XF_ ## x * sizeof(void *)) : "ip");
  46 #elif defined(__mips__)
  47 #define EXPORT_FUNC(x)                                  \
  48 asm volatile (                                          \
  49 "       .globl mon_" #x "\n"                            \
  50 "mon_" #x ":\n"                                         \
  51 "       lw      $25, %0($26)\n"                         \
  52 "       lw      $25, %1($25)\n"                         \
  53 "       jr      $25\n"                                  \
  54         : : "i"(offsetof(xxx_t, pfunc)), "i"(XF_ ## x * sizeof(void *)) : "t9");
  55 #else
  56 #error [No stub code for this arch]
  57 #endif
  58
  59 void dummy(void)
  60 {
  61 EXPORT_FUNC(printf)
  62 EXPORT_FUNC(strcpy)
  63 }
  64
  65 int main(void)
  66 {
  67 #if defined(__i386__)
  68         xxx_t *pq;
  69 #elif defined(__powerpc__)
  70         register volatile xxx_t *pq asm("r2");
  71 #elif defined(__arm__)
  72         register volatile xxx_t *pq asm("r8");
  73 #elif defined(__mips__)
  74         register volatile xxx_t *pq asm("k0");
  75 #endif
  76         char buf[32];
  77
  78         func[XF_strcpy] = strcpy;
  79         func[XF_printf] = printf;
  80         pq = &q;
  81         pq->pfunc = pfunc = func;
  82
  83         mon_strcpy(buf, "test");
  84         mon_printf("hi %s %d z\n", buf, 444);
  85
  86         return 0;
  87 }