static void moncontrol (int);
extern void monstartup (char *, char *);
extern void _mcleanup (void);
-extern void internal_mcount (void);
+extern void internal_mcount (
+#ifdef __x86_64__
+ char *, unsigned short *
+#else
+ void
+#endif
+ );
struct phdr {
/* char *minbrk; */
+typedef __SIZE_TYPE__ size_t;
+typedef __PTRDIFF_TYPE__ intptr_t;
+
/*
* froms is actually a bunch of unsigned shorts indexing tos
*/
static long tolimit = 0;
static char *s_lowpc = 0;
static char *s_highpc = 0;
-static unsigned long s_textsize = 0;
+static size_t s_textsize = 0;
static int ssiz;
static char *sbuf;
extern int errno;
+extern void *sbrk (intptr_t);
+
void
monstartup(char *lowpc, char *highpc)
{
- int monsize;
+ size_t monsize;
char *buffer;
- register int o;
+ register size_t o;
/*
* round lowpc and highpc to multiples of the density we're using
* so the rest of the scaling (here and in gprof) stays in ints.
*/
lowpc = (char *)
- ROUNDDOWN((unsigned long)lowpc, HISTFRACTION*sizeof(HISTCOUNTER));
+ ROUNDDOWN((size_t)lowpc, HISTFRACTION*sizeof(HISTCOUNTER));
s_lowpc = lowpc;
highpc = (char *)
- ROUNDUP((unsigned long)highpc, HISTFRACTION*sizeof(HISTCOUNTER));
+ ROUNDUP((size_t)highpc, HISTFRACTION*sizeof(HISTCOUNTER));
s_highpc = highpc;
s_textsize = highpc - lowpc;
monsize = (s_textsize / HISTFRACTION) + sizeof(struct phdr);
close( fd );
}
+#ifdef __x86_64__
+/* See GLIBC for additional information about this technique. */
+asm(".globl _mcount\n"
+ "\t.type\t_mcount, @function\n"
+ "_mcount:\n"
+ /* The compiler calls _mcount after the prologue, and does not
+ save any of the registers. Therefore we must preserve all
+ seven registers which may contain function arguments. */
+ "\tsubq\t$0x38,%rsp\n"
+ "\tmovq\t%rax,(%rsp)\n"
+ "\tmovq\t%rcx,0x08(%rsp)\n"
+ "\tmovq\t%rdx,0x10(%rsp)\n"
+ "\tmovq\t%rsi,0x18(%rsp)\n"
+ "\tmovq\t%rdi,0x20(%rsp)\n"
+ "\tmovq\t%r8,0x28(%rsp)\n"
+ "\tmovq\t%r9,0x30(%rsp)\n"
+ /* Get SELFPC (pushed by the call to this function) and
+ FROMPCINDEX (via the frame pointer. */
+ "\tmovq\t0x38(%rsp),%rdi\n"
+ "\tmovq\t0x8(%rbp),%rsi\n"
+ "\tcallq\tinternal_mcount\n"
+ /* Restore the saved registers. */
+ "\tmovq\t0x30(%rsp),%r9\n"
+ "\tmovq\t0x28(%rsp),%r8\n"
+ "\tmovq\t0x20(%rsp),%rdi\n"
+ "\tmovq\t0x18(%rsp),%rsi\n"
+ "\tmovq\t0x10(%rsp),%rdx\n"
+ "\tmovq\t0x08(%rsp),%rdx\n"
+ "\tmovq\t(%rsp),%rax\n"
+ "\taddq\t$0x38,%rsp\n"
+ "\tretq\n"
+ );
+#else
/* Solaris 2 libraries use _mcount. */
asm(".globl _mcount; _mcount: jmp internal_mcount");
/* This is for compatibility with old versions of gcc which used mcount. */
asm(".globl mcount; mcount: jmp internal_mcount");
+#endif
void
-internal_mcount (void)
+internal_mcount (
+#ifdef __x86_64__
+ char *selfpc,
+ unsigned short *frompcindex
+#else
+ void
+#endif
+ )
{
+#ifndef __x86_64__
register char *selfpc;
register unsigned short *frompcindex;
+#endif
register struct tostruct *top;
register struct tostruct *prevtop;
register long toindex;
static char already_setup;
+#ifndef __x86_64__
/*
* find the return address for mcount,
* and the return address for mcount's caller.
/* frompcindex = pc in preceding frame.
This identifies the caller of the function just entered. */
frompcindex = (void *) __builtin_return_address (1);
+#endif
if(!already_setup) {
extern char etext[];
already_setup = 1;
-/* monstartup(0, etext); */
+#ifdef __x86_64__
+ monstartup(0, etext);
+#else
monstartup((char*)0x08040000, etext);
+#endif
#ifdef USE_ONEXIT
on_exit(_mcleanup, 0);
#else
/* start */
profil((unsigned short *)(sbuf + sizeof(struct phdr)),
ssiz - sizeof(struct phdr),
- (long)s_lowpc, s_scale);
+ (size_t)s_lowpc, s_scale);
profiling = 0;
} else {