test_vsyscall: Remove asm int support

The corresponding kernel code never made it into a released kernel.

1 files changed, 0 insertions, 127 deletions

diff --git a/test_vsyscall.cc b/test_vsyscall.cc
index e131c37..b285856 100644
--- a/test_vsyscall.cc
+++ b/test_vsyscall.cc
@@ -313,129 +313,6 @@ int call(int argc, char **argv)
   return 1;
 }
 
-int intxx(int argc, char **argv)
-{
-  unsigned long vec;
-  char *end;
-
-  if (argc != 1) {
-    printf("Usage: intxx <vector>\n");
-    return 1;
-  }
-
-  errno = 0;
-  vec = strtoul(argv[0], &end, 0);
-  if (errno || *end || vec > 0xff) {
-    printf("Bad argumant\n");
-    return 1;
-  }
-
-  printf("About to execute int 0x%02x\n",
-	 (unsigned)vec);
-
-  switch (vec) {
-  case 0xcc:
-    asm volatile ("int %0" : : "i" (0xcc));
-    break;
-
-  case 0x40:
-    asm volatile ("int %0" : : "i" (0x40));
-    break;
-
-  case 0x41:
-    asm volatile ("int %0" : : "i" (0x41));
-    break;
-
-  case 0x42:
-    asm volatile ("int %0" : : "i" (0x42));
-    break;
-
-  default:
-    printf("Sorry, not implemented.\n");
-  }
-  return 0;
-}
-
-struct __attribute__((packed)) farptr {
-  uint32_t offset;
-  uint16_t sel;
-};
-
-#if __x86_64__
-static bool to_farptr(farptr *out, uint16_t sel, void *offset)
-{
-  out->sel = sel;
-  out->offset = (uint32_t)(unsigned long)offset;
-  return out->offset == (unsigned long)offset;
-}
-#endif
-
-int intcc32(int argc, char **argv)
-{
-  if (argc != 0) {
-    printf("Usage: intcc32\n");
-    return 1;
-  }
-
-#if __x86_64__
-  // Install a 32-bit code descriptor
-  struct user_desc desc;
-  memset(&desc, 0, sizeof(desc));
-  desc.entry_number = 0;
-  desc.base_addr = 0;
-  desc.limit = 0xFFFFF;
-  desc.seg_32bit = 1;
-  desc.contents = MODIFY_LDT_CONTENTS_CODE;
-  desc.limit_in_pages = 1;
-
-  if (modify_ldt(1, &desc, sizeof(desc)) != 0) {
-    perror("modify_ldt");
-    return 1;
-  }
-
-  /* Load the initial CS. */
-  uint16_t initial_cs;
-  asm ("mov %%cs,%[initial_cs]" : [initial_cs] "=rm" (initial_cs));
-  printf("Initial CS = 0x%04X (entry %d)\n",
-	 (unsigned)initial_cs, (int)(initial_cs >> 3));
-
-  extern char landing_32, landing_64;
-
-  /* Set up the pointers. */
-  static farptr ptr32, ptr64;
-  if (!to_farptr(&ptr32, 0x4, &landing_32) || !to_farptr(&ptr64, initial_cs, &landing_64)) {
-    printf("Something's mapped too high\n");
-    return 1;
-  }
-
-  /* Go for it! */
-  asm volatile (
-		"mov %%rsp,%%rsi\n"		// Save rsp (avoids truncation).
-		"ljmpl *(%%eax)\n"		// Switch to 32-bit mode.
-
-		// 32-bit mode!
-		// (Well, sort of.  DS and ES are 0, so we can't use them.)
-		".code32\n"
-		"landing_32:\n"
-		"\tint $0xcc\n"			// Try int 0xcc.
-		"\tljmpl *%%cs:(%%ecx)\n"	// Switch back.
-
-		// 64-bit mode again!
-		".code64\n"
-		"landing_64:\n"
-		"\tmov %%rsi,%%rsp"
-		:
-		: "a" (&ptr32), "c" (&ptr64)
-		: "rsi", "cc");
-
-  printf("Holy cow!  We survived!\n");
-#else
-  printf("Not supported on 32-bit builds\n");
-#endif
-
-  return 0;
-}
-
 int main(int argc, char **argv)
 {
   struct sigaction sa_segv;
@@ -457,10 +334,6 @@ int main(int argc, char **argv)
     return test(argc - 2, argv + 2);
   if (!strcmp(argv[1], "bench"))
     return bench(argc - 2, argv + 2);
-  if (!strcmp(argv[1], "int"))
-    return intxx(argc - 2, argv + 2);
-  if (!strcmp(argv[1], "intcc32"))
-    return intcc32(argc - 2, argv + 2);
   if (!strcmp(argv[1], "call"))
     return call(argc - 2, argv + 2);