#

# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38239 

# This will be fixed in 5.4.

# 

# Index: libgcc/ChangeLog

# ===================================================================

# --- a/libgcc/ChangeLog	(revision 234364)

# +++ b/libgcc/ChangeLog	(revision 234365)

# @@ -1,3 +1,13 @@

# +2016-03-21  Rainer Orth  <[email protected]>

# +

# +	Backport from mainline

# +	2016-03-16  Rainer Orth  <[email protected]>

# +

# +	PR target/38239

# +	* config/sol2/gmon.c [__i386__] (_mcount): Save and restore

# +	call-clobbered registers.

# +	(internal_mcount): Remove __i386__ handling.

# +

#  2016-02-10  Ian Lance Taylor  <[email protected]>

#  

#  	PR go/68562

Index: libgcc/config/sol2/gmon.c

===================================================================

--- a/libgcc/config/sol2/gmon.c	(revision 234364)

+++ b/libgcc/config/sol2/gmon.c	(revision 234365)

@@ -44,11 +44,7 @@

 extern void monstartup (char *, char *);

 extern void _mcleanup (void);

-#ifdef __i386__

-static void internal_mcount (void) __attribute__ ((used));

-#else

 static void internal_mcount (char *, unsigned short *) __attribute__ ((used));

-#endif

 static void moncontrol (int);

 struct phdr {

@@ -223,8 +219,19 @@

 /* Solaris 2 libraries use _mcount.  */

 #if defined __i386__

 asm(".globl _mcount\n"

+    "	.type	_mcount, @function\n"

     "_mcount:\n"

-    "	jmp	internal_mcount\n");

+    /* Save and restore the call-clobbered registers.  */

+    "	pushl	%eax\n"

+    "	pushl	%ecx\n"

+    "	pushl	%edx\n"

+    "	movl	12(%esp), %edx\n"

+    "	movl	4(%ebp), %eax\n"

+    "	call	internal_mcount\n"

+    "	popl	%edx\n"

+    "	popl	%ecx\n"

+    "	popl	%eax\n"

+    "	ret\n");

 #elif defined __x86_64__

 /* See GLIBC for additional information about this technique.  */

 asm(".globl _mcount\n" 

@@ -299,11 +306,7 @@

 #endif

 static void

-#ifdef __i386__

-internal_mcount (void)

-#else

 internal_mcount (char *selfpc, unsigned short *frompcindex)

-#endif

 {

   struct tostruct *top;

   struct tostruct *prevtop;

@@ -310,21 +313,6 @@

   long toindex;

   static char already_setup;

-#ifdef __i386__

-  char *selfpc;

-  unsigned short *frompcindex;

-

-  /* Find the return address for mcount and the return address for mcount's

-     caller.  */

-

-  /* selfpc = pc pushed by mcount call.

-     This identifies the function that was just entered.  */

-  selfpc = (void *) __builtin_return_address (0);

-  /* frompcindex = pc in preceding frame.

-     This identifies the caller of the function just entered.  */

-  frompcindex = (void *) __builtin_return_address (1);

-#endif

-

 /* Only necessary without the Solaris CRTs or a proper gcrt1.o, otherwise

    crtpg.o or gcrt1.o take care of that.