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30 #include "search_list.h"
38 * Opcodes of the call instructions:
43 #define Jxx_FUNC_JMP 0
44 #define Jxx_FUNC_JSR 1
45 #define Jxx_FUNC_RET 2
46 #define Jxx_FUNC_JSR_COROUTINE 3
49 /* Here to document only. We can't use this when cross compiling as
50 the bitfield layout might not be the same as native.
81 static Sym indirect_child
;
83 void alpha_find_call (Sym
*, bfd_vma
, bfd_vma
);
86 * On the Alpha we can only detect PC relative calls, which are
87 * usually generated for calls to functions within the same
88 * object file only. This is still better than nothing, however.
89 * (In particular it should be possible to find functions that
90 * potentially call integer division routines, for example.)
93 alpha_find_call (Sym
*parent
, bfd_vma p_lowpc
, bfd_vma p_highpc
)
99 if (indirect_child
.name
== NULL
)
101 sym_init (&indirect_child
);
102 indirect_child
.name
= _("<indirect child>");
103 indirect_child
.cg
.prop
.fract
= 1.0;
104 indirect_child
.cg
.cyc
.head
= &indirect_child
;
107 DBG (CALLDEBUG
, printf (_("[find_call] %s: 0x%lx to 0x%lx\n"),
108 parent
->name
, (unsigned long) p_lowpc
,
109 (unsigned long) p_highpc
));
110 for (pc
= (p_lowpc
+ 3) & ~(bfd_vma
) 3; pc
< p_highpc
; pc
+= 4)
112 insn
= bfd_get_32 (core_bfd
, ((unsigned char *) core_text_space
113 + pc
- core_text_sect
->vma
));
114 switch (insn
& (0x3f << 26))
118 * There is no simple and reliable way to determine the
119 * target of a jsr (the hint bits help, but there aren't
120 * enough bits to get a satisfactory hit rate). Instead,
121 * for any indirect jump we simply add an arc from PARENT
122 * to INDIRECT_CHILD---that way the user it at least able
123 * to see that there are other calls as well.
125 if ((insn
& (3 << 14)) == Jxx_FUNC_JSR
<< 14
126 || (insn
& (3 << 14)) == Jxx_FUNC_JSR_COROUTINE
<< 14)
129 printf (_("[find_call] 0x%lx: jsr%s <indirect_child>\n"),
131 ((insn
& (3 << 14)) == Jxx_FUNC_JSR
<< 14
132 ? "" : "_coroutine")));
133 arc_add (parent
, &indirect_child
, (unsigned long) 0);
139 printf (_("[find_call] 0x%lx: bsr"), (unsigned long) pc
));
141 * Regular PC relative addressing. Check that this is the
142 * address of a function. The linker sometimes redirects
143 * the entry point by 8 bytes to skip loading the global
144 * pointer, so we allow for either address:
146 dest_pc
= pc
+ 4 + (((bfd_signed_vma
) (insn
& 0x1fffff)
147 ^ 0x100000) - 0x100000);
148 if (hist_check_address (dest_pc
))
150 child
= sym_lookup (&symtab
, dest_pc
);
154 printf (" 0x%lx\t; name=%s, addr=0x%lx",
155 (unsigned long) dest_pc
, child
->name
,
156 (unsigned long) child
->addr
));
157 if (child
->addr
== dest_pc
|| child
->addr
== dest_pc
- 8)
159 DBG (CALLDEBUG
, printf ("\n"));
161 arc_add (parent
, child
, (unsigned long) 0);
167 * Something funny going on.
169 DBG (CALLDEBUG
, printf ("\tbut it's a botch\n"));
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