diff options
Diffstat (limited to 'scripts/recordmcount.pl')
| -rwxr-xr-x | scripts/recordmcount.pl | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/scripts/recordmcount.pl b/scripts/recordmcount.pl index ab368e8a007..92f09fe9639 100755 --- a/scripts/recordmcount.pl +++ b/scripts/recordmcount.pl @@ -295,6 +295,58 @@ if ($arch eq "x86_64") { $ld .= " -m elf64_sparc"; $cc .= " -m64"; $objcopy .= " -O elf64-sparc"; +} elsif ($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].*?)>:"; + $type = ".dword"; + } } elsif ($arch eq "microblaze") { # Microblaze calls '_mcount' instead of plain 'mcount'. $mcount_regex = "^\\s*([0-9a-fA-F]+):.*\\s_mcount\$"; |