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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 if (!core_text_space)
111 if (p_lowpc < s_lowpc)
115 if (p_highpc > s_highpc)
119 DBG (CALLDEBUG, printf (_("[find_call] %s: 0x%lx to 0x%lx\n"),
120 parent->name, (unsigned long) p_lowpc,
121 (unsigned long) p_highpc));
122 for (pc = (p_lowpc + 3) & ~(bfd_vma) 3; pc < p_highpc; pc += 4)
124 insn = bfd_get_32 (core_bfd, ((unsigned char *) core_text_space
125 + pc - core_text_sect->vma));
126 switch (insn & (0x3f << 26))
130 * There is no simple and reliable way to determine the
131 * target of a jsr (the hint bits help, but there aren't
132 * enough bits to get a satisfactory hit rate). Instead,
133 * for any indirect jump we simply add an arc from PARENT
134 * to INDIRECT_CHILD---that way the user it at least able
135 * to see that there are other calls as well.
137 if ((insn & (3 << 14)) == Jxx_FUNC_JSR << 14
138 || (insn & (3 << 14)) == Jxx_FUNC_JSR_COROUTINE << 14)
141 printf (_("[find_call] 0x%lx: jsr%s <indirect_child>\n"),
143 ((insn & (3 << 14)) == Jxx_FUNC_JSR << 14
144 ? "" : "_coroutine")));
145 arc_add (parent, &indirect_child, (unsigned long) 0);
151 printf (_("[find_call] 0x%lx: bsr"), (unsigned long) pc));
153 * Regular PC relative addressing. Check that this is the
154 * address of a function. The linker sometimes redirects
155 * the entry point by 8 bytes to skip loading the global
156 * pointer, so we allow for either address:
158 dest_pc = pc + 4 + (((bfd_signed_vma) (insn & 0x1fffff)
159 ^ 0x100000) - 0x100000);
160 if (dest_pc >= s_lowpc && dest_pc <= s_highpc)
162 child = sym_lookup (&symtab, dest_pc);
164 printf (" 0x%lx\t; name=%s, addr=0x%lx",
165 (unsigned long) dest_pc, child->name,
166 (unsigned long) child->addr));
167 if (child->addr == dest_pc || child->addr == dest_pc - 8)
169 DBG (CALLDEBUG, printf ("\n"));
171 arc_add (parent, child, (unsigned long) 0);
176 * Something funny going on.
178 DBG (CALLDEBUG, printf ("\tbut it's a botch\n"));