From 465c6cca2668a2db2a4ffce3dca5714017873f2b Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Fri, 6 Aug 2010 03:26:24 -0400 Subject: tracing: Extend recordmcount to better support Blackfin mcount The mcount call on Blackfin systems includes some stack manipulation around the actual call site, so extend the build time perl script to support this. This way we can avoid doing the calculation at runtime. Signed-off-by: Mike Frysinger LKML-Reference: <1281079584-21205-1-git-send-email-vapier@gentoo.org> Signed-off-by: Steven Rostedt --- scripts/recordmcount.pl | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'scripts/recordmcount.pl') diff --git a/scripts/recordmcount.pl b/scripts/recordmcount.pl index f3c9c0a..2c56539 100755 --- a/scripts/recordmcount.pl +++ b/scripts/recordmcount.pl @@ -159,6 +159,7 @@ my $section_regex; # Find the start of a section my $function_regex; # Find the name of a function # (return offset and func name) my $mcount_regex; # Find the call site to mcount (return offset) +my $mcount_adjust; # Address adjustment to mcount offset my $alignment; # The .align value to use for $mcount_section my $section_type; # Section header plus possible alignment command my $can_use_local = 0; # If we can use local function references @@ -213,6 +214,7 @@ $section_regex = "Disassembly of section\\s+(\\S+):"; $function_regex = "^([0-9a-fA-F]+)\\s+<(.*?)>:"; $mcount_regex = "^\\s*([0-9a-fA-F]+):.*\\smcount\$"; $section_type = '@progbits'; +$mcount_adjust = 0; $type = ".long"; if ($arch eq "x86_64") { @@ -351,6 +353,9 @@ if ($arch eq "x86_64") { } elsif ($arch eq "microblaze") { # Microblaze calls '_mcount' instead of plain 'mcount'. $mcount_regex = "^\\s*([0-9a-fA-F]+):.*\\s_mcount\$"; +} elsif ($arch eq "blackfin") { + $mcount_regex = "^\\s*([0-9a-fA-F]+):.*\\s__mcount\$"; + $mcount_adjust = -4; } else { die "Arch $arch is not supported with CONFIG_FTRACE_MCOUNT_RECORD"; } @@ -511,7 +516,7 @@ while () { } # is this a call site to mcount? If so, record it to print later if ($text_found && /$mcount_regex/) { - push(@offsets, hex $1); + push(@offsets, (hex $1) + $mcount_adjust); } } -- cgit v1.1