Update copyright dates with scripts/update-copyrights.

[thirdparty/glibc.git] / sysdeps / x86_64 / _mcount.S

diff --git a/sysdeps/x86_64/_mcount.S b/sysdeps/x86_64/_mcount.S
index 132f307277603640cfbb4c7f2dfe8b2e84bc67fa..5d7edd2a29e06956e878bf0b688ed4c557ebffc5 100644 (file)
--- a/sysdeps/x86_64/_mcount.S
+++ b/sysdeps/x86_64/_mcount.S
@@ -1,5 +1,5 @@
 /* Machine-specific calling sequence for `mcount' profiling function.  x86-64 version.
-   Copyright (C) 2002 Free Software Foundation, Inc.
+   Copyright (C) 2002-2016 Free Software Foundation, Inc.
    Contributed by Andreas Jaeger <aj@suse.de>.
    This file is part of the GNU C Library.
 
@@ -14,9 +14,8 @@
    Lesser General Public License for more details.
 
    You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, write to the Free
-   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-   02111-1307 USA.  */
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
 
 /* Assembly stub to invoke _mcount().  Compiler generated code calls
    this stub after executing a function's prologue and without saving any
@@ -25,8 +24,8 @@
 
 #include <sysdep.h>
 
-       ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(_mcount)
-       ASM_TYPE_DIRECTIVE(C_SYMBOL_NAME(_mcount), @function)
+       .globl C_SYMBOL_NAME(_mcount)
+       .type C_SYMBOL_NAME(_mcount), @function
        .align ALIGNARG(4)
 C_LABEL(_mcount)
        /* Allocate space for 7 registers.  */
@@ -41,7 +40,7 @@ C_LABEL(_mcount)
 
        /* Setup parameter for __mcount_internal.  */
        /* selfpc is the return address on the stack.  */
-       movq    48(%rsp),%rsi
+       movq    56(%rsp),%rsi
        /* Get frompc via the frame pointer.  */
        movq    8(%rbp),%rdi
 #ifdef PIC
@@ -51,17 +50,55 @@ C_LABEL(_mcount)
 #endif
        /* Pop the saved registers.  Please note that `mcount' has no
           return value.  */
-       movq    (%rsp),%r9
-       movq    8(%rsp),%r8
-       movq    16(%rsp),%rdi
+       movq    48(%rsp),%r9
+       movq    40(%rsp),%r8
+       movq    32(%rsp),%rdi
        movq    24(%rsp),%rsi
-       movq    32(%rsp),%rdx
-       movq    40(%rsp),%rcx
-       movq    48(%rsp),%rax
+       movq    16(%rsp),%rdx
+       movq    8(%rsp),%rcx
+       movq    (%rsp),%rax
        addq    $56,%rsp
        ret
 
        ASM_SIZE_DIRECTIVE(C_SYMBOL_NAME(_mcount))
 
 #undef mcount
-weak_alias(_mcount, mcount)
+weak_alias (_mcount, mcount)
+
+       .globl C_SYMBOL_NAME(__fentry__)
+       .type C_SYMBOL_NAME(__fentry__), @function
+       .align ALIGNARG(4)
+C_LABEL(__fentry__)
+       /* Allocate space for 7 registers.  */
+       subq    $64,%rsp
+       movq    %rax,(%rsp)
+       movq    %rcx,8(%rsp)
+       movq    %rdx,16(%rsp)
+       movq    %rsi,24(%rsp)
+       movq    %rdi,32(%rsp)
+       movq    %r8,40(%rsp)
+       movq    %r9,48(%rsp)
+
+       /* Setup parameter for __mcount_internal.  */
+       /* selfpc is the return address on the stack.  */
+       movq    64(%rsp),%rsi
+       /* caller is the return address above it */
+       movq    72(%rsp),%rdi
+#ifdef PIC
+       call C_SYMBOL_NAME(__mcount_internal)@PLT
+#else
+       call C_SYMBOL_NAME(__mcount_internal)
+#endif
+       /* Pop the saved registers.  Please note that `__fentry__' has no
+          return value.  */
+       movq    48(%rsp),%r9
+       movq    40(%rsp),%r8
+       movq    32(%rsp),%rdi
+       movq    24(%rsp),%rsi
+       movq    16(%rsp),%rdx
+       movq    8(%rsp),%rcx
+       movq    (%rsp),%rax
+       addq    $64,%rsp
+       ret
+
+       ASM_SIZE_DIRECTIVE(C_SYMBOL_NAME(__fentry__))