.debug_frame is useful independent from the other .debug sections.
Add a simplified variant of the addrcfi testcase dwarfcfi.
dwarfcfi only uses dwarf_frame calls and no dwfl helpers.
Signed-off-by: Mark Wielaard <mark@klomp.org>
+2018-06-27 Mark Wielaard <mark@klomp.org>
+
+ * dwarf_begin_elf.c (check_section): Allow a single .debug_frame
+ section.
+
2018-06-26 Mark Wielaard <mark@klomp.org>
* libdw.h (dwarf_getscn_info): Remove.
Require at least one section that can be read "standalone". */
if (likely (result != NULL)
&& unlikely (result->sectiondata[IDX_debug_info] == NULL
- && result->sectiondata[IDX_debug_line] == NULL))
+ && result->sectiondata[IDX_debug_line] == NULL
+ && result->sectiondata[IDX_debug_frame] == NULL))
{
Dwarf_Sig8_Hash_free (&result->sig8_hash);
__libdw_seterrno (DWARF_E_NO_DWARF);
+2018-06-27 Mark Wielaard <mark@klomp.org>
+
+ * dwarf_cfi.c: New file.
+ * run-dwarfcfi.sh: New test.
+ * testfile11-debugframe.bz2: New testfile.
+ * testfile12-debugframe.bz2: Likewise.
+ * testfileaarch64-debugframe.bz2: Likewise.
+ * testfilearm-debugframe.bz2: Likewise.
+ * testfileppc32-debugframe.bz2: Likewise.
+ * testfileppc64-debugframe.bz2: Likewise.
+ * Makefile.am (check_PROGRAMS): Add dwarfcfi.
+ (TESTS): Add run-dwarfcfi.sh.
+ (EXTRA_DIST): Add run-dwarfcfi.sh, testfile11-debugframe.bz2,
+ testfile12-debugframe.bz2, testfileaarch64-debugframe.bz2,
+ testfilearm-debugframe.bz2, testfileppc32-debugframe.bz2 and
+ testfileppc64-debugframe.bz2.
+
2018-06-23 Mark Wielaard <mark@klomp.org>
* varlocs.c (print_expr): Take a new depth argument. Check it isn't
dwfl-bug-addr-overflow arls dwfl-bug-fd-leak \
dwfl-addr-sect dwfl-bug-report early-offscn \
dwfl-bug-getmodules dwarf-getmacros dwarf-ranges addrcfi \
+ dwarfcfi \
test-flag-nobits dwarf-getstring rerequest_tag \
alldts typeiter typeiter2 low_high_pc \
test-elf_cntl_gelf_getshdr dwflsyms dwfllines \
run-ranlib-test2.sh run-ranlib-test3.sh run-ranlib-test4.sh \
run-addrscopes.sh run-strings-test.sh run-funcscopes.sh \
run-find-prologues.sh run-allregs.sh run-addrcfi.sh \
+ run-dwarfcfi.sh \
run-nm-self.sh run-readelf-self.sh run-readelf-info-plus.sh \
run-readelf-const-values.sh \
run-varlocs-self.sh run-exprlocs-self.sh \
run-addrscopes.sh run-strings-test.sh run-funcscopes.sh \
run-nm-self.sh run-readelf-self.sh run-readelf-info-plus.sh \
run-readelf-const-values.sh testfile-const-values.debug.bz2 \
- run-addrcfi.sh \
+ run-addrcfi.sh run-dwarfcfi.sh \
+ testfile11-debugframe.bz2 testfile12-debugframe.bz2 \
+ testfileaarch64-debugframe.bz2 testfilearm-debugframe.bz2 \
+ testfileppc32-debugframe.bz2 testfileppc64-debugframe.bz2 \
run-varlocs-self.sh run-exprlocs-self.sh \
run-find-prologues.sh run-allregs.sh run-native-test.sh \
run-addrname-test.sh run-dwfl-bug-offline-rel.sh \
dwarf_ranges_LDADD = $(libdw)
dwarf_getstring_LDADD = $(libdw)
addrcfi_LDADD = $(libdw) $(libebl) $(libelf) $(argp_LDADD) -ldl
+dwarfcfi_LDADD = $(libdw) $(libelf)
test_flag_nobits_LDADD = $(libelf)
rerequest_tag_LDADD = $(libdw)
alldts_LDADD = $(libdw) $(libelf)
--- /dev/null
+/* Test program for DWARF (.debug_frame) CFI handling.
+ Copyright (C) 2009-2010, 2013, 2015, 2018 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 <error.h>
+#include ELFUTILS_HEADER(dw)
+#include <dwarf.h>
+#include <argp.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.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)
+{
+ 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);
+ else if (ops[i].number != 0)
+ printf ("(%" PRId64 ")", ops[i].number);
+ }
+ else
+ printf ("(%" PRId64 ",%" PRId64 ")",
+ ops[i].number, ops[i].number2);
+ }
+ puts ("");
+ }
+}
+
+static int
+handle_address (Dwarf_CFI *cfi, GElf_Addr pc)
+{
+ Dwarf_Frame *frame;
+ int result = dwarf_cfi_addrframe (cfi, pc, &frame);
+ if (result != 0)
+ {
+ printf ("dwarf_cfi_addrframe: %s\n", dwarf_errmsg (-1));
+ return 1;
+ }
+
+ Dwarf_Addr start = pc;
+ Dwarf_Addr end = pc;
+ bool signalp;
+ int ra_regno = dwarf_frame_info (frame, &start, &end, &signalp);
+
+ printf ("%#" PRIx64 " => [%#" PRIx64 ", %#" PRIx64 "):\n",
+ pc, start, end);
+
+ if (ra_regno < 0)
+ printf ("\treturn address register unavailable (%s)\n",
+ dwarf_errmsg (-1));
+ 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 (frame, &cfa_ops, &cfa_nops);
+
+ printf ("\tCFA ");
+ print_detail (result, cfa_ops, cfa_nops);
+
+ // Print the location of the first 10 (DWARF nr) registers
+ for (int r = 0; r < 10; r++)
+ {
+ Dwarf_Op ops_mem[3];
+ Dwarf_Op *ops;
+ size_t nops;
+ printf ("\treg%d: ", r);
+ int reg_result = dwarf_frame_register (frame, r, ops_mem, &ops, &nops);
+ print_detail (reg_result, ops, nops);
+ result |= reg_result;
+ }
+
+ free (frame);
+ return result;
+}
+
+int
+main (int argc, char *argv[])
+{
+ if (argc <= 2)
+ error (EXIT_FAILURE, 0, "need file name argument and addresses");
+
+ int fd = open (argv[1], O_RDONLY);
+ if (fd == -1)
+ error (EXIT_FAILURE, errno, "cannot open input file `%s'", argv[1]);
+
+ elf_version (EV_CURRENT);
+
+ Elf *elf = elf_begin (fd, ELF_C_READ, NULL);
+ if (elf == NULL)
+ error (EXIT_FAILURE, 0, "cannot create ELF descriptor: %s",
+ elf_errmsg (-1));
+
+ Dwarf *dwarf = dwarf_begin_elf (elf, DWARF_C_READ, NULL);
+ if (dwarf == NULL)
+ error (EXIT_FAILURE, 0, "cannot create DWARF descriptor: %s",
+ dwarf_errmsg (-1));
+
+ Dwarf_CFI *cfi = dwarf_getcfi (dwarf);
+ if (cfi == NULL)
+ error (EXIT_FAILURE, 0, "cannot get DWARF CFI from .dwarf_frame: %s",
+ dwarf_errmsg (-1));
+
+ int result = 0;
+ int args = 2;
+ do
+ {
+ char *endp;
+ uintmax_t addr = strtoumax (argv[args], &endp, 0);
+ if (endp != argv[args])
+ result |= handle_address (cfi, addr);
+ else
+ result = 1;
+ }
+ while (args++ < argc - 1);
+
+ dwarf_end (dwarf);
+ elf_end (elf);
+
+ return result;
+}
--- /dev/null
+#! /bin/sh
+# Test for dwarf_getcfi.
+# Copyright (C) 2018 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/>.
+
+. $srcdir/test-subr.sh
+
+# Test files come from run-addrcfi with all sections stripped except
+# the .debug_frame.
+# for i in <testfiles>
+# eu-strip -f $i-debugframe $i
+# eu-strip -g --remove-comment --keep-section=.debug_frame $i-debugframe
+# done
+testfiles testfile11-debugframe testfile12-debugframe
+testfiles testfileaarch64-debugframe
+testfiles testfilearm-debugframe
+testfiles testfileppc32-debugframe
+testfiles testfileppc64-debugframe
+
+testfiles testfile11-debugframe
+testrun_compare ${abs_builddir}/dwarfcfi testfile11-debugframe 0x080489b8 <<\EOF
+0x80489b8 => [0x80489b8, 0x80489b9):
+ return address in reg8
+ CFA location expression: bregx(4,4)
+ reg0: undefined
+ reg1: undefined
+ reg2: undefined
+ reg3: same_value
+ reg4: location expression: call_frame_cfa stack_value
+ reg5: same_value
+ reg6: same_value
+ reg7: same_value
+ reg8: location expression: call_frame_cfa plus_uconst(-4)
+ reg9: undefined
+EOF
+
+testfiles testfile12-debugframe
+testrun_compare ${abs_builddir}/dwarfcfi testfile12-debugframe 0x00000000000009d0 <<\EOF
+0x9d0 => [0x9d0, 0x9d1):
+ return address in reg16
+ CFA location expression: bregx(7,8)
+ reg0: same_value
+ reg1: undefined
+ reg2: undefined
+ reg3: undefined
+ reg4: undefined
+ reg5: undefined
+ reg6: same_value
+ reg7: location expression: call_frame_cfa stack_value
+ reg8: undefined
+ reg9: undefined
+EOF
+
+testfiles testfileppc32-debugframe
+testrun_compare ${abs_builddir}/dwarfcfi testfileppc32-debugframe 0x100004c0 <<\EOF
+0x100004c0 => [0x100004c0, 0x100004d0):
+ return address in reg65
+ CFA location expression: bregx(1)
+ reg0: undefined
+ reg1: location expression: call_frame_cfa stack_value
+ reg2: same_value
+ reg3: undefined
+ reg4: undefined
+ reg5: undefined
+ reg6: undefined
+ reg7: undefined
+ reg8: undefined
+ reg9: undefined
+EOF
+
+testfiles testfileppc64-debugframe
+testrun_compare ${abs_builddir}/dwarfcfi testfileppc64-debugframe 0x00000000100005b0 <<\EOF
+0x100005b0 => [0x100005b0, 0x100005d0):
+ return address in reg65
+ CFA location expression: bregx(1)
+ reg0: undefined
+ reg1: location expression: call_frame_cfa stack_value
+ reg2: same_value
+ reg3: undefined
+ reg4: undefined
+ reg5: undefined
+ reg6: undefined
+ reg7: undefined
+ reg8: undefined
+ reg9: undefined
+EOF
+
+testfiles testfilearm-debugframe
+testrun_compare ${abs_builddir}/dwarfcfi testfilearm-debugframe 0x00008510 <<\EOF
+0x8510 => [0x8510, 0x8524):
+ return address in reg14
+ CFA location expression: bregx(13)
+ reg0: undefined
+ reg1: undefined
+ reg2: undefined
+ reg3: undefined
+ reg4: same_value
+ reg5: same_value
+ reg6: same_value
+ reg7: same_value
+ reg8: same_value
+ reg9: undefined
+EOF
+
+testfiles testfileaarch64-debugframe
+testrun_compare ${abs_builddir}/dwarfcfi testfileaarch64-debugframe 0x400550 <<\EOF
+0x400550 => [0x400550, 0x400568):
+ return address in reg30
+ CFA location expression: bregx(31)
+ reg0: undefined
+ reg1: undefined
+ reg2: undefined
+ reg3: undefined
+ reg4: undefined
+ reg5: undefined
+ reg6: undefined
+ reg7: undefined
+ reg8: undefined
+ reg9: undefined
+EOF
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