ARM: 6511/1: ftrace: add ARM support for C version of recordmcount
Depending on the compiler version, ARM GCC calls the mcount function
either __gnu_mcount_nc or mcount.
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/scripts/recordmcount.c b/scripts/recordmcount.c
index ac6e51c..038b3d1 100644
--- a/scripts/recordmcount.c
+++ b/scripts/recordmcount.c
@@ -38,6 +38,7 @@
static char gpfx; /* prefix for global symbol name (sometimes '_') */
static struct stat sb; /* Remember .st_size, etc. */
static jmp_buf jmpenv; /* setjmp/longjmp per-file error escape */
+static const char *altmcount; /* alternate mcount symbol name */
/* setjmp() return values */
enum {
@@ -299,7 +300,9 @@
fail_file();
} break;
case EM_386: reltype = R_386_32; break;
- case EM_ARM: reltype = R_ARM_ABS32; break;
+ case EM_ARM: reltype = R_ARM_ABS32;
+ altmcount = "__gnu_mcount_nc";
+ break;
case EM_IA_64: reltype = R_IA64_IMM64; gpfx = '_'; break;
case EM_MIPS: /* reltype: e_class */ gpfx = '_'; break;
case EM_PPC: reltype = R_PPC_ADDR32; gpfx = '_'; break;
diff --git a/scripts/recordmcount.h b/scripts/recordmcount.h
index 58e933a..8087bc8 100644
--- a/scripts/recordmcount.h
+++ b/scripts/recordmcount.h
@@ -275,11 +275,12 @@
Elf_Sym const *const symp =
&sym0[Elf_r_sym(relp)];
char const *symname = &str0[w(symp->st_name)];
+ char const *mcount = '_' == gpfx ? "_mcount" : "mcount";
if ('.' == symname[0])
++symname; /* ppc64 hack */
- if (0 == strcmp((('_' == gpfx) ? "_mcount" : "mcount"),
- symname))
+ if (0 == strcmp(mcount, symname) ||
+ (altmcount && 0 == strcmp(altmcount, symname)))
mcountsym = Elf_r_sym(relp);
}