Adding upstream version 1.22.4.upstream/1.22.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 310 insertions, 0 deletions

diff --git a/scripts/Dpkg/Shlibs/Objdump.pm b/scripts/Dpkg/Shlibs/Objdump.pm
new file mode 100644
index 0000000..bc2909c
--- /dev/null
+++ b/scripts/Dpkg/Shlibs/Objdump.pm
@@ -0,0 +1,310 @@
+# Copyright © 2007-2010 Raphaël Hertzog <hertzog@debian.org>
+# Copyright © 2007-2009,2012-2015,2017-2018 Guillem Jover <guillem@debian.org>
+#
+# This program 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 2 of the License, or
+# (at your option) any later version.
+#
+# This program 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 <https://www.gnu.org/licenses/>.
+
+=encoding utf8
+
+=head1 NAME
+
+Dpkg::Shlibs::Objdump - symbol support via objdump
+
+=head1 DESCRIPTION
+
+This module provides a class that wraps objdump to handle symbols and
+their attributes from a shared object.
+
+B<Note>: This is a private module, its API can change at any time.
+
+=cut
+
+package Dpkg::Shlibs::Objdump 0.01;
+
+use strict;
+use warnings;
+use feature qw(state);
+
+use Dpkg::Gettext;
+use Dpkg::ErrorHandling;
+use Dpkg::Shlibs::Objdump::Object;
+
+sub new {
+    my $this = shift;
+    my $class = ref($this) || $this;
+    my $self = { objects => {} };
+    bless $self, $class;
+    return $self;
+}
+
+sub add_object {
+    my ($self, $obj) = @_;
+    my $id = $obj->get_id;
+    if ($id) {
+	$self->{objects}{$id} = $obj;
+    }
+    return $id;
+}
+
+sub analyze {
+    my ($self, $file) = @_;
+    my $obj = Dpkg::Shlibs::Objdump::Object->new($file);
+
+    return $self->add_object($obj);
+}
+
+sub locate_symbol {
+    my ($self, $name) = @_;
+    foreach my $obj (values %{$self->{objects}}) {
+	my $sym = $obj->get_symbol($name);
+	if (defined($sym) && $sym->{defined}) {
+	    return $sym;
+	}
+    }
+    return;
+}
+
+sub get_object {
+    my ($self, $objid) = @_;
+    if ($self->has_object($objid)) {
+	return $self->{objects}{$objid};
+    }
+    return;
+}
+
+sub has_object {
+    my ($self, $objid) = @_;
+    return exists $self->{objects}{$objid};
+}
+
+use constant {
+    # ELF Class.
+    ELF_BITS_NONE           => 0,
+    ELF_BITS_32             => 1,
+    ELF_BITS_64             => 2,
+
+    # ELF Data encoding.
+    ELF_ORDER_NONE          => 0,
+    ELF_ORDER_2LSB          => 1,
+    ELF_ORDER_2MSB          => 2,
+
+    # ELF Machine.
+    EM_NONE                 => 0,
+    EM_SPARC                => 2,
+    EM_386                  => 3,
+    EM_68K                  => 4,
+    EM_MIPS                 => 8,
+    EM_SPARC64_OLD          => 11,
+    EM_PARISC               => 15,
+    EM_SPARC32PLUS          => 18,
+    EM_PPC                  => 20,
+    EM_PPC64                => 21,
+    EM_S390                 => 22,
+    EM_ARM                  => 40,
+    EM_ALPHA_OLD            => 41,
+    EM_SH                   => 42,
+    EM_SPARC64              => 43,
+    EM_IA64                 => 50,
+    EM_X86_64               => 62,
+    EM_OR1K                 => 92,
+    EM_AARCH64              => 183,
+    EM_ARCV2                => 195,
+    EM_RISCV                => 243,
+    EM_LOONGARCH            => 258,
+    EM_OR1K_OLD             => 0x8472,
+    EM_ALPHA                => 0x9026,
+    EM_S390_OLD             => 0xa390,
+    EM_NIOS32               => 0xfebb,
+
+    # ELF Version.
+    EV_NONE                 => 0,
+    EV_CURRENT              => 1,
+
+    # ELF Flags (might influence the ABI).
+    EF_ARM_ALIGN8           => 0x00000040,
+    EF_ARM_NEW_ABI          => 0x00000080,
+    EF_ARM_OLD_ABI          => 0x00000100,
+    EF_ARM_SOFT_FLOAT       => 0x00000200,
+    EF_ARM_HARD_FLOAT       => 0x00000400,
+    EF_ARM_EABI_MASK        => 0xff000000,
+
+    EF_IA64_ABI64           => 0x00000010,
+
+    EF_LOONGARCH_SOFT_FLOAT     => 0x00000001,
+    EF_LOONGARCH_SINGLE_FLOAT   => 0x00000002,
+    EF_LOONGARCH_DOUBLE_FLOAT   => 0x00000003,
+    EF_LOONGARCH_ABI_MASK       => 0x00000007,
+
+    EF_MIPS_ABI2            => 0x00000020,
+    EF_MIPS_32BIT           => 0x00000100,
+    EF_MIPS_FP64            => 0x00000200,
+    EF_MIPS_NAN2008         => 0x00000400,
+    EF_MIPS_ABI_MASK        => 0x0000f000,
+    EF_MIPS_ARCH_MASK       => 0xf0000000,
+
+    EF_OR1K_NODELAY         => 0x00000001,
+
+    EF_PPC64_ABI64          => 0x00000003,
+
+    EF_RISCV_FLOAT_ABI_SOFT     => 0x0000,
+    EF_RISCV_FLOAT_ABI_SINGLE   => 0x0002,
+    EF_RISCV_FLOAT_ABI_DOUBLE   => 0x0004,
+    EF_RISCV_FLOAT_ABI_QUAD     => 0x0006,
+    EF_RISCV_FLOAT_ABI_MASK     => 0x0006,
+    EF_RISCV_RVE                => 0x0008,
+
+    EF_SH_MACH_MASK         => 0x0000001f,
+};
+
+# These map machine IDs to their name.
+my %elf_mach_name = (
+    EM_NONE()               => 'none',
+    EM_386()                => 'i386',
+    EM_68K()                => 'm68k',
+    EM_AARCH64()            => 'arm64',
+    EM_ALPHA()              => 'alpha',
+    EM_ARCV2()              => 'arcv2',
+    EM_ARM()                => 'arm',
+    EM_IA64()               => 'ia64',
+    EM_LOONGARCH()          => 'loong',
+    EM_MIPS()               => 'mips',
+    EM_NIOS32()             => 'nios2',
+    EM_OR1K()               => 'or1k',
+    EM_PARISC()             => 'hppa',
+    EM_PPC()                => 'ppc',
+    EM_PPC64()              => 'ppc64',
+    EM_RISCV()              => 'riscv',
+    EM_S390()               => 's390',
+    EM_SH()                 => 'sh',
+    EM_SPARC()              => 'sparc',
+    EM_SPARC64()            => 'sparc64',
+    EM_X86_64()             => 'amd64',
+);
+
+# These map alternative or old machine IDs to their canonical form.
+my %elf_mach_map = (
+    EM_ALPHA_OLD()          => EM_ALPHA,
+    EM_OR1K_OLD()           => EM_OR1K,
+    EM_S390_OLD()           => EM_S390,
+    EM_SPARC32PLUS()        => EM_SPARC,
+    EM_SPARC64_OLD()        => EM_SPARC64,
+);
+
+# These masks will try to expose processor flags that are ABI incompatible,
+# and as such are part of defining the architecture ABI. If uncertain it is
+# always better to not mask a flag, because that preserves the historical
+# behavior, and we do not drop dependencies.
+my %elf_flags_mask = (
+    # XXX: The mask for ARM had to be disabled due to objects in the wild
+    # with EABIv4, while EABIv5 is the current one, and the soft and hard
+    # flags not always being set on armel and armhf respectively, although
+    # the Tag_ABI_VFP_args in the ARM attribute section should always be
+    # present on armhf, and there are even cases where both soft and hard
+    # float flags are set at the same time(!). Once these are confirmed to
+    # be fixed, we could reconsider enabling the below for a more strict
+    # ABI mismatch check. See #853793.
+#   EM_ARM()                => EF_ARM_EABI_MASK |
+#                              EF_ARM_NEW_ABI | EF_ARM_OLD_ABI |
+#                              EF_ARM_SOFT_FLOAT | EF_ARM_HARD_FLOAT,
+    EM_IA64()               => EF_IA64_ABI64,
+    EM_LOONGARCH()          => EF_LOONGARCH_ABI_MASK,
+    EM_MIPS()               => EF_MIPS_ABI_MASK | EF_MIPS_ABI2,
+    EM_OR1K()               => EF_OR1K_NODELAY,
+    EM_PPC64()              => EF_PPC64_ABI64,
+    EM_RISCV()              => EF_RISCV_FLOAT_ABI_MASK | EF_RISCV_RVE,
+);
+
+sub get_format {
+    my ($file) = @_;
+    state %format;
+
+    return $format{$file} if exists $format{$file};
+
+    my $header;
+
+    open my $fh, '<', $file or syserr(g_('cannot read %s'), $file);
+    my $rc = read $fh, $header, 64;
+    if (not defined $rc) {
+        syserr(g_('cannot read %s'), $file);
+    } elsif ($rc != 64) {
+        return;
+    }
+    close $fh;
+
+    my %elf;
+
+    # Unpack the identifier field.
+    @elf{qw(magic bits endian vertype osabi verabi)} = unpack 'a4C5', $header;
+
+    return unless $elf{magic} eq "\x7fELF";
+    return unless $elf{vertype} == EV_CURRENT;
+
+    my %abi;
+    my ($elf_word, $elf_endian);
+    if ($elf{bits} == ELF_BITS_32) {
+        $abi{bits} = 32;
+        $elf_word = 'L';
+    } elsif ($elf{bits} == ELF_BITS_64) {
+        $abi{bits} = 64;
+        $elf_word = 'Q';
+    } else {
+        return;
+    }
+    if ($elf{endian} == ELF_ORDER_2LSB) {
+        $abi{endian} = 'l';
+        $elf_endian = '<';
+    } elsif ($elf{endian} == ELF_ORDER_2MSB) {
+        $abi{endian} = 'b';
+        $elf_endian = '>';
+    } else {
+        return;
+    }
+
+    # Unpack the endianness and size dependent fields.
+    my $tmpl = "x16(S2Lx[${elf_word}3]L)${elf_endian}";
+    @elf{qw(type mach version flags)} = unpack $tmpl, $header;
+
+    # Canonicalize the machine ID.
+    $elf{mach} = $elf_mach_map{$elf{mach}} // $elf{mach};
+    $abi{mach} = $elf_mach_name{$elf{mach}} // $elf{mach};
+
+    # Mask any processor flags that might not change the architecture ABI.
+    $abi{flags} = $elf{flags} & ($elf_flags_mask{$elf{mach}} // 0);
+
+    # Normalize into a colon-separated string for easy comparison, and easy
+    # debugging aid.
+    $format{$file} = join ':', 'ELF', @abi{qw(bits endian mach flags)};
+
+    return $format{$file};
+}
+
+sub is_elf {
+    my $file = shift;
+    open(my $file_fh, '<', $file) or syserr(g_('cannot read %s'), $file);
+    my ($header, $result) = ('', 0);
+    if (read($file_fh, $header, 4) == 4) {
+	$result = 1 if ($header =~ /^\177ELF$/);
+    }
+    close($file_fh);
+    return $result;
+}
+
+=head1 CHANGES
+
+=head2 Version 0.xx
+
+This is a private module.
+
+=cut
+
+1;