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ftrace/s390: mcount offset calculation

Do the mcount offset adjustment in the recordmcount.pl/recordmcount.[ch]
at compile time and not in ftrace_call_adjust at run time.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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commit f29638868280534ed7e2fdd93b31557232597940 1 parent 521ccb5
Martin Schwidefsky authored rostedt committed
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4 arch/s390/include/asm/ftrace.h
@@ -11,15 +11,13 @@ struct dyn_arch_ftrace { };
#ifdef CONFIG_64BIT
#define MCOUNT_INSN_SIZE 12
-#define MCOUNT_OFFSET 8
#else
#define MCOUNT_INSN_SIZE 20
-#define MCOUNT_OFFSET 4
#endif
static inline unsigned long ftrace_call_adjust(unsigned long addr)
{
- return addr - MCOUNT_OFFSET;
+ return addr;
}
#endif /* __ASSEMBLY__ */
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8 scripts/recordmcount.c
@@ -368,8 +368,10 @@ do_file(char const *const fname)
"unrecognized ET_REL file: %s\n", fname);
fail_file();
}
- if (w2(ehdr->e_machine) == EM_S390)
+ if (w2(ehdr->e_machine) == EM_S390) {
reltype = R_390_32;
+ mcount_adjust_32 = -4;
+ }
if (w2(ehdr->e_machine) == EM_MIPS) {
reltype = R_MIPS_32;
is_fake_mcount32 = MIPS32_is_fake_mcount;
@@ -384,8 +386,10 @@ do_file(char const *const fname)
"unrecognized ET_REL file: %s\n", fname);
fail_file();
}
- if (w2(ghdr->e_machine) == EM_S390)
+ if (w2(ghdr->e_machine) == EM_S390) {
reltype = R_390_64;
+ mcount_adjust_64 = -8;
+ }
if (w2(ghdr->e_machine) == EM_MIPS) {
reltype = R_MIPS_64;
Elf64_r_sym = MIPS64_r_sym;
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2  scripts/recordmcount.pl
@@ -243,12 +243,14 @@ sub check_objcopy
} elsif ($arch eq "s390" && $bits == 32) {
$mcount_regex = "^\\s*([0-9a-fA-F]+):\\s*R_390_32\\s+_mcount\$";
+ $mcount_adjust = -4;
$alignment = 4;
$ld .= " -m elf_s390";
$cc .= " -m31";
} elsif ($arch eq "s390" && $bits == 64) {
$mcount_regex = "^\\s*([0-9a-fA-F]+):\\s*R_390_(PC|PLT)32DBL\\s+_mcount\\+0x2\$";
+ $mcount_adjust = -8;
$alignment = 8;
$type = ".quad";
$ld .= " -m elf64_s390";
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