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cell-binutils  2.17cvs20070401
Defines | Functions | Variables
alpha.c File Reference
#include "gprof.h"
#include "search_list.h"
#include "source.h"
#include "symtab.h"
#include "cg_arcs.h"
#include "corefile.h"
#include "hist.h"

Go to the source code of this file.

Defines

#define OP_Jxx   0x1a
#define OP_BSR   0x34
#define Jxx_FUNC_JMP   0
#define Jxx_FUNC_JSR   1
#define Jxx_FUNC_RET   2
#define Jxx_FUNC_JSR_COROUTINE   3

Functions

void alpha_find_call (Sym *, bfd_vma, bfd_vma)

Variables

static Sym indirect_child

Define Documentation

#define Jxx_FUNC_JMP   0

Definition at line 43 of file alpha.c.

#define Jxx_FUNC_JSR   1

Definition at line 44 of file alpha.c.

#define Jxx_FUNC_JSR_COROUTINE   3

Definition at line 46 of file alpha.c.

#define Jxx_FUNC_RET   2

Definition at line 45 of file alpha.c.

#define OP_BSR   0x34

Definition at line 41 of file alpha.c.

#define OP_Jxx   0x1a

Definition at line 40 of file alpha.c.


Function Documentation

void alpha_find_call ( Sym parent,
bfd_vma  p_lowpc,
bfd_vma  p_highpc 
)

Definition at line 93 of file alpha.c.

{
  bfd_vma pc, dest_pc;
  unsigned int insn;
  Sym *child;

  if (indirect_child.name == NULL)
    {
      sym_init (&indirect_child);
      indirect_child.name = _("<indirect child>");
      indirect_child.cg.prop.fract = 1.0;
      indirect_child.cg.cyc.head = &indirect_child;
    }

  if (!core_text_space)
    {
      return;
    }
  if (p_lowpc < s_lowpc)
    {
      p_lowpc = s_lowpc;
    }
  if (p_highpc > s_highpc)
    {
      p_highpc = s_highpc;
    }
  DBG (CALLDEBUG, printf (_("[find_call] %s: 0x%lx to 0x%lx\n"),
                       parent->name, (unsigned long) p_lowpc,
                       (unsigned long) p_highpc));
  for (pc = (p_lowpc + 3) & ~(bfd_vma) 3; pc < p_highpc; pc += 4)
    {
      insn = bfd_get_32 (core_bfd, ((unsigned char *) core_text_space
                                + pc - core_text_sect->vma));
      switch (insn & (0x3f << 26))
       {
       case OP_Jxx << 26:
         /*
          * There is no simple and reliable way to determine the
          * target of a jsr (the hint bits help, but there aren't
          * enough bits to get a satisfactory hit rate).  Instead,
          * for any indirect jump we simply add an arc from PARENT
          * to INDIRECT_CHILD---that way the user it at least able
          * to see that there are other calls as well.
          */
         if ((insn & (3 << 14)) == Jxx_FUNC_JSR << 14
             || (insn & (3 << 14)) == Jxx_FUNC_JSR_COROUTINE << 14)
           {
             DBG (CALLDEBUG,
                 printf (_("[find_call] 0x%lx: jsr%s <indirect_child>\n"),
                        (unsigned long) pc,
                        ((insn & (3 << 14)) == Jxx_FUNC_JSR << 14
                         ? "" : "_coroutine")));
             arc_add (parent, &indirect_child, (unsigned long) 0);
           }
         break;

       case OP_BSR << 26:
         DBG (CALLDEBUG,
              printf (_("[find_call] 0x%lx: bsr"), (unsigned long) pc));
         /*
          * Regular PC relative addressing.  Check that this is the
          * address of a function.  The linker sometimes redirects
          * the entry point by 8 bytes to skip loading the global
          * pointer, so we allow for either address:
          */
         dest_pc = pc + 4 + (((bfd_signed_vma) (insn & 0x1fffff)
                            ^ 0x100000) - 0x100000);
         if (dest_pc >= s_lowpc && dest_pc <= s_highpc)
           {
             child = sym_lookup (&symtab, dest_pc);
             DBG (CALLDEBUG,
                 printf (" 0x%lx\t; name=%s, addr=0x%lx",
                        (unsigned long) dest_pc, child->name,
                        (unsigned long) child->addr));
             if (child->addr == dest_pc || child->addr == dest_pc - 8)
              {
                DBG (CALLDEBUG, printf ("\n"));
                /* a hit:  */
                arc_add (parent, child, (unsigned long) 0);
                continue;
              }
           }
         /*
          * Something funny going on.
          */
         DBG (CALLDEBUG, printf ("\tbut it's a botch\n"));
         break;

       default:
         break;
       }
    }
}

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Variable Documentation

Sym indirect_child [static]

Definition at line 81 of file alpha.c.