(Logical change 1.55)

tests/ia64-test-dyn1.c

@@ -0,0 +1,148 @@
+#include <libunwind.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <sys/mman.h>
+
+#ifdef __ia64__
+# define GET_ENTRY(fdesc)	(((uintptr_t *) (fdesc))[0])
+# define GET_GP(fdesc)		(((uintptr_t *) (fdesc))[0])
+# define EXTRA			16
+#else
+# define GET_ENTRY(fdesc)	((uintptr_t ) (fdesc))
+# define GET_GP(fdesc)		(0)
+# define EXTRA			0
+#endif
+
+static void
+flush_cache (void *addr, size_t len)
+{
+#ifdef __ia64__
+  void *end = (char *) addr + len;
+
+  while (addr < end)
+    {
+      asm volatile ("fc %0" :: "r"(addr));
+      addr = (char *) addr + 32;
+    }
+  asm volatile (";;sync.i;;srlz.i;;");
+#endif
+}
+
+int
+make_executable (void *addr, size_t len)
+{
+  if (mprotect ((void *) (((long) addr) & -getpagesize ()), len,
+		PROT_READ | PROT_WRITE | PROT_EXEC) < 0)
+    {
+      perror ("mprotect");
+      return -1;
+    }
+  flush_cache (addr, len);
+  return 0;
+}
+
+void *
+create_func (unw_dyn_info_t *di, const char *name, long (*func) (),
+	     void *end, unw_dyn_region_info_t *region)
+{
+  void *mem, *addr, *fptr;
+  unw_word_t gp = 0;
+  size_t len;
+
+  len = (uintptr_t) end - GET_ENTRY (func) + EXTRA;
+  mem = malloc (len);
+
+#ifdef __ia64__
+  addr = (void *) GET_ENTRY (func);
+
+  /* build function descriptor: */
+  ((long *) mem)[0] = (long) mem + 16;		/* entry point */
+  ((long *) mem)[1] = GET_GP (func);		/* global-pointer */
+  fptr = mem;
+  mem = (void *) ((long) mem + 16);
+#else
+  fptr = mem;
+#endif
+
+  memcpy (mem, addr, len);
+
+  if (make_executable (mem, len) < 0)
+    return NULL;
+
+  if (di)
+    {
+      memset (di, 0, sizeof (*di));
+      di->start_ip = (unw_word_t) mem;
+      di->end_ip = (unw_word_t) mem + len;
+      di->gp = gp;
+      di->format = UNW_INFO_FORMAT_DYNAMIC;
+      di->u.pi.name_ptr = (unw_word_t) name;
+      di->u.pi.regions = region;
+    }
+  return fptr;
+}
+
+int
+main (int argc, char **argv)
+{
+  extern long func_add1 (long);
+  extern char func_add1_end[];
+  extern long func_add3 (long, long (*[])());
+  extern char func_add3_end[];
+  extern char _U_dyn_info_list[];
+  unw_dyn_region_info_t *r_pro, *r_epi;
+  unw_dyn_info_t di0, di1;
+  long (*add1) (long);
+  long (*add3_0) (long);
+  long (*add3_1) (long, long (*[])());
+  void *flist[2];
+  long ret;
+
+  add1 = create_func (NULL, "func_add1", func_add1, func_add1_end, NULL);
+
+  /* Describe the epilogue of func_add3: */
+  r_epi = alloca (_U_dyn_region_info_size (2));
+  r_epi->next = NULL;
+  r_epi->insn_count = -4;
+  r_epi->op_count = 2;
+  _U_dyn_op_pop_frames (&r_epi->op[0],
+			/* qp=*/ 1, /* when=*/ 0, /* num_frames=*/ 1);
+  _U_dyn_op_stop (&r_epi->op[1]);
+
+  /* Describe the prologue of func_add3: */
+  r_pro = alloca (_U_dyn_region_info_size (2));
+  r_pro->next = r_epi;
+  r_pro->insn_count = 3;
+  r_pro->op_count = 3;
+  _U_dyn_op_save_reg (&r_pro->op[0], /* qp=*/ 1, /* when=*/ 0,
+		      /* reg=*/ UNW_IA64_AR_PFS, /* dst=*/ UNW_IA64_GR + 35);
+  _U_dyn_op_save_reg (&r_pro->op[1], /* qp=*/ 1, /* when=*/ 2,
+		      /* reg=*/ UNW_IA64_BR + 0, /* dst=*/ UNW_IA64_GR + 34);
+  _U_dyn_op_stop (&r_pro->op[2]);
+
+  /* Create two functions which can share the region-list:  */
+  add3_0 = create_func (&di0, "func_add3/0", func_add3, func_add3_end, r_pro);
+  add3_1 = create_func (&di1, "func_add3/1", func_add3, func_add3_end, r_pro);
+
+  _U_dyn_register (&di0);
+  _U_dyn_register (&di1);
+
+  flist[0] = add3_0;
+  flist[1] = add1;
+
+  syscall (-1);		/* do something ptmon can latch onto */
+  ret = (*add3_1) (13, flist);
+
+  _U_dyn_cancel (&di0);
+  _U_dyn_cancel (&di1);
+
+  if (ret != 18)
+    {
+      fprintf (stderr, "FAILURE: (*add3_1)(13) returned %ld\n", ret);
+      exit (-1);
+    }
+  return 0;
+}