#!/usr/bin/perl -w # use strict; use Math::BigInt; use Fcntl "SEEK_SET"; die "Format: $0 [-s ] \n" if ($#ARGV != 1 && $#ARGV != 3 || $#ARGV == 3 && $ARGV[0] ne "-s"); my $sysmap = ""; if ($#ARGV == 3) { shift; $sysmap = $ARGV[0]; shift; } my $vmlinux = $ARGV[0]; my $keyring = $ARGV[1]; # # Parse the vmlinux section table # open FD, "objdump -h $vmlinux |" || die $vmlinux; my @lines = ; close(FD) || die $vmlinux; my @sections = (); foreach my $line (@lines) { chomp($line); if ($line =~ /\s*([0-9]+)\s+(\S+)\s+([0-9a-f]+)\s+([0-9a-f]+)\s+([0-9a-f]+)\s+([0-9a-f]+)\s+2[*][*]([0-9]+)/ ) { my $seg = $1; my $name = $2; my $len = Math::BigInt->new("0x" . $3); my $vma = Math::BigInt->new("0x" . $4); my $lma = Math::BigInt->new("0x" . $5); my $foff = Math::BigInt->new("0x" . $6); my $align = 2 ** $7; push @sections, { name => $name, vma => $vma, len => $len, foff => $foff }; } } print "Have $#sections sections\n"; # # Try and parse the vmlinux symbol table. If the vmlinux file has been created # from a vmlinuz file with extract-vmlinux then the symbol table will be empty. # open FD, "nm $vmlinux 2>/dev/null |" || die $vmlinux; @lines = ; close(FD) || die $vmlinux; my %symbols = (); my $nr_symbols = 0; sub parse_symbols(@) { foreach my $line (@_) { chomp($line); if ($line =~ /([0-9a-f]+)\s([a-zA-Z])\s(\S+)/ ) { my $addr = "0x" . $1; my $type = $2; my $name = $3; $symbols{$name} = $addr; $nr_symbols++; } } } parse_symbols(@lines); if ($nr_symbols == 0 && $sysmap ne "") { print "No symbols in vmlinux, trying $sysmap\n"; open FD, "<$sysmap" || die $sysmap; @lines = ; close(FD) || die $sysmap; parse_symbols(@lines); } die "No symbols available\n" if ($nr_symbols == 0); print "Have $nr_symbols symbols\n"; die "Can't find system certificate list" unless (exists($symbols{"__cert_list_start"}) && exists($symbols{"system_certificate_list_size"})); my $start = Math::BigInt->new($symbols{"__cert_list_start"}); my $end; my $size; my $size_sym = Math::BigInt->new($symbols{"system_certificate_list_size"}); open FD, "<$vmlinux" || die $vmlinux; binmode(FD); my $s = undef; foreach my $sec (@sections) { my $s_name = $sec->{name}; my $s_vma = $sec->{vma}; my $s_len = $sec->{len}; my $s_foff = $sec->{foff}; my $s_vend = $s_vma + $s_len; next unless ($start >= $s_vma); next if ($start >= $s_vend); die "Certificate list size was not found on the same section\n" if ($size_sym < $s_vma || $size_sym > $s_vend); die "Cert object in multiple sections: ", $s_name, " and ", $s->{name}, "\n" if ($s); my $size_off = $size_sym -$s_vma + $s_foff; my $packed; die $vmlinux if (!defined(sysseek(FD, $size_off, SEEK_SET))); sysread(FD, $packed, 8); $size = unpack 'L!', $packed; $end = $start + $size; printf "Have %u bytes of certs at VMA 0x%x\n", $size, $start; die "Cert object partially overflows section $s_name\n" if ($end > $s_vend); $s = $sec; } die "Cert object not inside a section\n" unless ($s); print "Certificate list in section ", $s->{name}, "\n"; my $foff = $start - $s->{vma} + $s->{foff}; printf "Certificate list at file offset 0x%x\n", $foff; die $vmlinux if (!defined(sysseek(FD, $foff, SEEK_SET))); my $buf = ""; my $len = sysread(FD, $buf, $size); die "$vmlinux" if (!defined($len)); die "Short read on $vmlinux\n" if ($len != $size); close(FD) || die $vmlinux; open FD, ">$keyring" || die $keyring; binmode(FD); $len = syswrite(FD, $buf, $size); die "$keyring" if (!defined($len)); die "Short write on $keyring\n" if ($len != $size); close(FD) || die $keyring; '>6space:mode:
authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2017-02-03 17:10:28 +1100
committerMichael Ellerman <mpe@ellerman.id.au>2017-02-08 23:36:29 +1100
commitd7df2443cd5f67fc6ee7c05a88e4996e8177f91b (patch)
tree098a7c0ca4fceb8a65cb1f693c9d71990388933d /sound/soc/tegra/tegra_wm8753.c
parenta0615a16f7d0ceb5804d295203c302d496d8ee91 (diff)
powerpc/mm: Fix spurrious segfaults on radix with autonuma
When autonuma (Automatic NUMA balancing) marks a PTE inaccessible it clears all the protection bits but leave the PTE valid. With the Radix MMU, an attempt at executing from such a PTE will take a fault with bit 35 of SRR1 set "SRR1_ISI_N_OR_G". It is thus incorrect to treat all such faults as errors. We should pass them to handle_mm_fault() for autonuma to deal with. The case of pages that are really not executable is handled by the existing test for VM_EXEC further down. That leaves us with catching the kernel attempts at executing user pages. We can catch that earlier, even before we do find_vma. It is never valid on powerpc for the kernel to take an exec fault to begin with. So fold that test with the existing test for the kernel faulting on kernel addresses to bail out early. Fixes: 1d18ad026844 ("powerpc/mm: Detect instruction fetch denied and report") Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'sound/soc/tegra/tegra_wm8753.c')