Squashed 'third_party/elfutils/' content from commit 555e15e
Change-Id: I61cde98949e47e5c8c09c33260de17f30921be79
git-subtree-dir: third_party/elfutils
git-subtree-split: 555e15ebe8bf1eb33d00747173cfc80cc65648a4
diff --git a/tests/addrcfi.c b/tests/addrcfi.c
new file mode 100644
index 0000000..589b851
--- /dev/null
+++ b/tests/addrcfi.c
@@ -0,0 +1,233 @@
+/* Test program for CFI handling.
+ Copyright (C) 2009-2010, 2013, 2015 Red Hat, Inc.
+ This file is part of elfutils.
+
+ This file is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ elfutils is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#include <config.h>
+#include <assert.h>
+#include <inttypes.h>
+#include ELFUTILS_HEADER(dwfl)
+#include <dwarf.h>
+#include <argp.h>
+#include <stdio.h>
+#include <stdio_ext.h>
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "../libdw/known-dwarf.h"
+
+static const char *
+op_name (unsigned int code)
+{
+ static const char *const known[] =
+ {
+#define DWARF_ONE_KNOWN_DW_OP(NAME, CODE) [CODE] = #NAME,
+ DWARF_ALL_KNOWN_DW_OP
+#undef DWARF_ONE_KNOWN_DW_OP
+ };
+
+ if (likely (code < sizeof (known) / sizeof (known[0])))
+ return known[code];
+
+ return NULL;
+}
+
+static void
+print_detail (int result, const Dwarf_Op *ops, size_t nops, Dwarf_Addr bias)
+{
+ if (result < 0)
+ printf ("indeterminate (%s)\n", dwarf_errmsg (-1));
+ else if (nops == 0)
+ printf ("%s\n", ops == NULL ? "same_value" : "undefined");
+ else
+ {
+ printf ("%s expression:", result == 0 ? "location" : "value");
+ for (size_t i = 0; i < nops; ++i)
+ {
+ printf (" %s", op_name(ops[i].atom));
+ if (ops[i].number2 == 0)
+ {
+ if (ops[i].atom == DW_OP_addr)
+ printf ("(%#" PRIx64 ")", ops[i].number + bias);
+ else if (ops[i].number != 0)
+ printf ("(%" PRId64 ")", ops[i].number);
+ }
+ else
+ printf ("(%" PRId64 ",%" PRId64 ")",
+ ops[i].number, ops[i].number2);
+ }
+ puts ("");
+ }
+}
+
+struct stuff
+{
+ Dwarf_Frame *frame;
+ Dwarf_Addr bias;
+};
+
+static int
+print_register (void *arg,
+ int regno,
+ const char *setname,
+ const char *prefix,
+ const char *regname,
+ int bits __attribute__ ((unused)),
+ int type __attribute__ ((unused)))
+{
+ struct stuff *stuff = arg;
+
+ printf ("\t%s reg%u (%s%s): ", setname, regno, prefix, regname);
+
+ Dwarf_Op ops_mem[2];
+ Dwarf_Op *ops;
+ size_t nops;
+ int result = dwarf_frame_register (stuff->frame, regno, ops_mem, &ops, &nops);
+ print_detail (result, ops, nops, stuff->bias);
+
+ return DWARF_CB_OK;
+}
+
+static int
+handle_cfi (Dwfl *dwfl, const char *which, Dwarf_CFI *cfi,
+ GElf_Addr pc, struct stuff *stuff)
+{
+ if (cfi == NULL)
+ {
+ printf ("handle_cfi no CFI (%s): %s\n", which, dwarf_errmsg (-1));
+ return -1;
+ }
+
+ int result = dwarf_cfi_addrframe (cfi, pc - stuff->bias, &stuff->frame);
+ if (result != 0)
+ {
+ printf ("dwarf_cfi_addrframe (%s): %s\n", which, dwarf_errmsg (-1));
+ return 1;
+ }
+
+ Dwarf_Addr start = pc;
+ Dwarf_Addr end = pc;
+ bool signalp;
+ int ra_regno = dwarf_frame_info (stuff->frame, &start, &end, &signalp);
+ if (ra_regno >= 0)
+ {
+ start += stuff->bias;
+ end += stuff->bias;
+ }
+
+ printf ("%s has %#" PRIx64 " => [%#" PRIx64 ", %#" PRIx64 "):\n",
+ which, pc, start, end);
+
+ if (ra_regno < 0)
+ printf ("\treturn address register unavailable (%s)\n",
+ dwarf_errmsg (0));
+ else
+ printf ("\treturn address in reg%u%s\n",
+ ra_regno, signalp ? " (signal frame)" : "");
+
+ // Point cfa_ops to dummy to match print_detail expectations.
+ // (nops == 0 && cfa_ops != NULL => "undefined")
+ Dwarf_Op dummy;
+ Dwarf_Op *cfa_ops = &dummy;
+ size_t cfa_nops;
+ result = dwarf_frame_cfa (stuff->frame, &cfa_ops, &cfa_nops);
+
+ printf ("\tCFA ");
+ print_detail (result, cfa_ops, cfa_nops, stuff->bias);
+
+ (void) dwfl_module_register_names (dwfl_addrmodule (dwfl, pc),
+ &print_register, stuff);
+
+ return 0;
+}
+
+static int
+handle_address (GElf_Addr pc, Dwfl *dwfl)
+{
+ Dwfl_Module *mod = dwfl_addrmodule (dwfl, pc);
+
+ struct stuff stuff;
+ stuff.frame = NULL;
+ stuff.bias = 0;
+ int res = handle_cfi (dwfl, ".eh_frame",
+ dwfl_module_eh_cfi (mod, &stuff.bias), pc, &stuff);
+ free (stuff.frame);
+
+ stuff.frame = NULL;
+ stuff.bias = 0;
+ res &= handle_cfi (dwfl, ".debug_frame",
+ dwfl_module_dwarf_cfi (mod, &stuff.bias), pc, &stuff);
+ free (stuff.frame);
+
+ return res;
+}
+
+int
+main (int argc, char *argv[])
+{
+ int remaining;
+
+ /* Set locale. */
+ (void) setlocale (LC_ALL, "");
+
+ Dwfl *dwfl = NULL;
+ (void) argp_parse (dwfl_standard_argp (), argc, argv, 0, &remaining, &dwfl);
+ assert (dwfl != NULL);
+
+ int result = 0;
+
+ /* Now handle the addresses. In case none are given on the command
+ line, read from stdin. */
+ if (remaining == argc)
+ {
+ /* We use no threads here which can interfere with handling a stream. */
+ (void) __fsetlocking (stdin, FSETLOCKING_BYCALLER);
+
+ char *buf = NULL;
+ size_t len = 0;
+ while (!feof_unlocked (stdin))
+ {
+ if (getline (&buf, &len, stdin) < 0)
+ break;
+
+ char *endp;
+ uintmax_t addr = strtoumax (buf, &endp, 0);
+ if (endp != buf)
+ result |= handle_address (addr, dwfl);
+ else
+ result = 1;
+ }
+
+ free (buf);
+ }
+ else
+ {
+ do
+ {
+ char *endp;
+ uintmax_t addr = strtoumax (argv[remaining], &endp, 0);
+ if (endp != argv[remaining])
+ result |= handle_address (addr, dwfl);
+ else
+ result = 1;
+ }
+ while (++remaining < argc);
+ }
+
+ dwfl_end (dwfl);
+
+ return result;
+}