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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. */
65 b; /* branch format */
79 static Sym indirect_child;
81 void alpha_find_call (Sym *, bfd_vma, bfd_vma);
84 * On the Alpha we can only detect PC relative calls, which are
85 * usually generated for calls to functions within the same
86 * object file only. This is still better than nothing, however.
87 * (In particular it should be possible to find functions that
88 * potentially call integer division routines, for example.)
91 alpha_find_call (Sym *parent, bfd_vma p_lowpc, bfd_vma p_highpc)
97 if (indirect_child.name == NULL)
99 sym_init (&indirect_child);
100 indirect_child.name = _("<indirect child>");
101 indirect_child.cg.prop.fract = 1.0;
102 indirect_child.cg.cyc.head = &indirect_child;
105 if (!core_text_space)
109 if (p_lowpc < s_lowpc)
113 if (p_highpc > s_highpc)
117 DBG (CALLDEBUG, printf (_("[find_call] %s: 0x%lx to 0x%lx\n"),
118 parent->name, (unsigned long) p_lowpc,
119 (unsigned long) p_highpc));
120 for (pc = (p_lowpc + 3) & ~(bfd_vma) 3; pc < p_highpc; pc += 4)
122 insn = bfd_get_32 (core_bfd, ((unsigned char *) core_text_space
123 + pc - core_text_sect->vma));
124 switch (insn & (0x3f << 26))
128 * There is no simple and reliable way to determine the
129 * target of a jsr (the hint bits help, but there aren't
130 * enough bits to get a satisfactory hit rate). Instead,
131 * for any indirect jump we simply add an arc from PARENT
132 * to INDIRECT_CHILD---that way the user it at least able
133 * to see that there are other calls as well.
135 if ((insn & (3 << 14)) == Jxx_FUNC_JSR << 14
136 || (insn & (3 << 14)) == Jxx_FUNC_JSR_COROUTINE << 14)
139 printf (_("[find_call] 0x%lx: jsr%s <indirect_child>\n"),
141 ((insn & (3 << 14)) == Jxx_FUNC_JSR << 14
142 ? "" : "_coroutine")));
143 arc_add (parent, &indirect_child, (unsigned long) 0);
149 printf (_("[find_call] 0x%lx: bsr"), (unsigned long) pc));
151 * Regular PC relative addressing. Check that this is the
152 * address of a function. The linker sometimes redirects
153 * the entry point by 8 bytes to skip loading the global
154 * pointer, so we allow for either address:
156 dest_pc = pc + 4 + (((bfd_signed_vma) (insn & 0x1fffff)
157 ^ 0x100000) - 0x100000);
158 if (dest_pc >= s_lowpc && dest_pc <= s_highpc)
160 child = sym_lookup (&symtab, dest_pc);
162 printf (" 0x%lx\t; name=%s, addr=0x%lx",
163 (unsigned long) dest_pc, child->name,
164 (unsigned long) child->addr));
165 if (child->addr == dest_pc || child->addr == dest_pc - 8)
167 DBG (CALLDEBUG, printf ("\n"));
169 arc_add (parent, child, (unsigned long) 0);
174 * Something funny going on.
176 DBG (CALLDEBUG, printf ("\tbut it's a botch\n"));