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Date: Mon, 23 Nov 2009 10:08:25 +1100
From: Stephen Rothwell <sfr@...b.auug.org.au>
To: Ralf Baechle <ralf@...ux-mips.org>
Cc: linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
Michal Simek <monstr@...str.eu>,
Wu Zhangjin <wuzhangjin@...il.com>
Subject: linux-next: manual merge of the mips tree with the microblaze tree
Hi Ralf,
Today's linux-next merge of the mips tree got a conflict in
scripts/recordmcount.pl between commit
3e3bc9dd3155ae0fdccdbdfb26d97e15c7acc499 ("microblaze: ftrace: Add
dynamic trace support") from the microblaze tree and commit
421e89b8ce7594cf5df27d801c433dbb69184486 ("MIPS: Tracing: Add dynamic
function tracer support") from the mips tree.
Just overlapping additions. I fixed it up (see below) and can carry the
fix as necessary. Thanks for the heads up, Ralf.
--
Cheers,
Stephen Rothwell sfr@...b.auug.org.au
diff --cc scripts/recordmcount.pl
index b30dabd,d016c71..0000000
--- a/scripts/recordmcount.pl
+++ b/scripts/recordmcount.pl
@@@ -245,9 -245,60 +245,63 @@@ if ($arch eq "x86_64")
$ld .= " -m elf64_sparc";
$cc .= " -m64";
$objcopy .= " -O elf64-sparc";
+} elsif ($arch eq "microblaze") {
+ # Microblaze calls '_mcount' instead of plain 'mcount'.
+ $mcount_regex = "^\\s*([0-9a-fA-F]+):.*\\s_mcount\$";
+
+ } elsif ($arch eq "mips") {
+ # To enable module support, we need to enable the -mlong-calls option
+ # of gcc for module, after using this option, we can not get the real
+ # offset of the calling to _mcount, but the offset of the lui
+ # instruction or the addiu one. herein, we record the address of the
+ # first one, and then we can replace this instruction by a branch
+ # instruction to jump over the profiling function to filter the
+ # indicated functions, or swith back to the lui instruction to trace
+ # them, which means dynamic tracing.
+ #
+ # c: 3c030000 lui v1,0x0
+ # c: R_MIPS_HI16 _mcount
+ # c: R_MIPS_NONE *ABS*
+ # c: R_MIPS_NONE *ABS*
+ # 10: 64630000 daddiu v1,v1,0
+ # 10: R_MIPS_LO16 _mcount
+ # 10: R_MIPS_NONE *ABS*
+ # 10: R_MIPS_NONE *ABS*
+ # 14: 03e0082d move at,ra
+ # 18: 0060f809 jalr v1
+ #
+ # for the kernel:
+ #
+ # 10: 03e0082d move at,ra
+ # 14: 0c000000 jal 0 <loongson_halt>
+ # 14: R_MIPS_26 _mcount
+ # 14: R_MIPS_NONE *ABS*
+ # 14: R_MIPS_NONE *ABS*
+ # 18: 00020021 nop
+ if ($is_module eq "0") {
+ $mcount_regex = "^\\s*([0-9a-fA-F]+):.*\\s_mcount\$";
+ } else {
+ $mcount_regex = "^\\s*([0-9a-fA-F]+): R_MIPS_HI16\\s+_mcount\$";
+ }
+ $objdump .= " -Melf-trad".$endian."mips ";
+
+ if ($endian eq "big") {
+ $endian = " -EB ";
+ $ld .= " -melf".$bits."btsmip";
+ } else {
+ $endian = " -EL ";
+ $ld .= " -melf".$bits."ltsmip";
+ }
+
+ $cc .= " -mno-abicalls -fno-pic -mabi=" . $bits . $endian;
+ $ld .= $endian;
+
+ if ($bits == 64) {
+ $function_regex =
+ "^([0-9a-fA-F]+)\\s+<(.|[^\$]L.*?|\$[^L].*?|[^\$][^L].*?)>:";
+ $type = ".dword";
+ }
+
} else {
die "Arch $arch is not supported with CONFIG_FTRACE_MCOUNT_RECORD";
}
--
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