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30 #include "search_list.h"
38 * opcode of the `calls' instruction
43 * register for pc relative addressing
49 literal, indexed, reg, regdef, autodec, autoinc, autoincdef,
50 bytedisp, bytedispdef, worddisp, worddispdef, longdisp, longdispdef,
51 immediate, absolute, byterel, bytereldef, wordrel, wordreldef,
54 typedef enum opermodes operandenum;
57 /* Here to document only. We can't use this when cross compiling as
58 the bitfield layout might not be the same as native.
62 unsigned int regfield:4;
63 unsigned int modefield:4;
69 * A symbol to be the child of indirect calls:
71 static Sym indirectchild;
73 static operandenum vax_operandmode (unsigned char *);
74 static char *vax_operandname (operandenum);
75 static long vax_operandlength (unsigned char *);
76 static bfd_signed_vma vax_offset (unsigned char *);
77 void vax_find_call (Sym *, bfd_vma, bfd_vma);
80 vax_operandmode (unsigned char *modep)
82 int usesreg = *modep & 0xf;
84 switch ((*modep >> 4) & 0xf)
100 return usesreg != PC ? autoinc : immediate;
102 return usesreg != PC ? autoincdef : absolute;
104 return usesreg != PC ? bytedisp : byterel;
106 return usesreg != PC ? bytedispdef : bytereldef;
108 return usesreg != PC ? worddisp : wordrel;
110 return usesreg != PC ? worddispdef : wordreldef;
112 return usesreg != PC ? longdisp : longrel;
114 return usesreg != PC ? longdispdef : longreldef;
121 vax_operandname (operandenum mode)
133 return "register deferred";
135 return "autodecrement";
137 return "autoincrement";
139 return "autoincrement deferred";
141 return "byte displacement";
143 return "byte displacement deferred";
145 return "byte relative";
147 return "byte relative deferred";
149 return "word displacement";
151 return "word displacement deferred";
153 return "word relative";
155 return "word relative deferred";
161 return "long displacement";
163 return "long displacement deferred";
165 return "long relative";
167 return "long relative deferred";
174 vax_operandlength (unsigned char *modep)
177 switch (vax_operandmode (modep))
204 return 1 + vax_operandlength (modep + 1);
210 static bfd_signed_vma
211 vax_offset (unsigned char *modep)
213 operandenum mode = vax_operandmode (modep);
215 ++modep; /* skip over the mode */
219 fprintf (stderr, "[reladdr] not relative address\n");
222 return 1 + bfd_get_signed_8 (core_bfd, modep);
224 return 2 + bfd_get_signed_16 (core_bfd, modep);
226 return 4 + bfd_get_signed_32 (core_bfd, modep);
232 vax_find_call (Sym *parent, bfd_vma p_lowpc, bfd_vma p_highpc)
234 unsigned char *instructp;
238 operandenum firstmode;
240 static bfd_boolean inited = FALSE;
245 sym_init (&indirectchild);
246 indirectchild.cg.prop.fract = 1.0;
247 indirectchild.cg.cyc.head = &indirectchild;
250 if (core_text_space == 0)
254 if (p_lowpc < s_lowpc)
258 if (p_highpc > s_highpc)
262 DBG (CALLDEBUG, printf ("[findcall] %s: 0x%lx to 0x%lx\n",
263 parent->name, (unsigned long) p_lowpc,
264 (unsigned long) p_highpc));
265 for (pc = p_lowpc; pc < p_highpc; pc += length)
268 instructp = ((unsigned char *) core_text_space
269 + pc - core_text_sect->vma);
270 if ((*instructp & 0xff) == CALLS)
273 * maybe a calls, better check it out.
274 * skip the count of the number of arguments.
277 printf ("[findcall]\t0x%lx:calls", (unsigned long) pc));
278 firstmode = vax_operandmode (instructp + length);
287 length += vax_operandlength (instructp + length);
288 mode = vax_operandmode (instructp + length);
290 printf ("\tfirst operand is %s", vax_operandname (firstmode));
291 printf ("\tsecond operand is %s\n", vax_operandname (mode)));
302 * indirect call: call through pointer
303 * either *d(r) as a parameter or local
304 * (r) as a return value
305 * *f as a global pointer
306 * [are there others that we miss?,
307 * e.g. arrays of pointers to functions???]
309 arc_add (parent, &indirectchild, (unsigned long) 0);
310 length += vax_operandlength (instructp + length);
316 * regular pc relative addressing
317 * check that this is the address of
320 destpc = pc + vax_offset (instructp + length);
321 if (destpc >= s_lowpc && destpc <= s_highpc)
323 child = sym_lookup (&symtab, destpc);
325 printf ("[findcall]\tdestpc 0x%lx",
326 (unsigned long) destpc);
327 printf (" child->name %s", child->name);
328 printf (" child->addr 0x%lx\n",
329 (unsigned long) child->addr);
331 if (child->addr == destpc)
336 arc_add (parent, child, (unsigned long) 0);
337 length += vax_operandlength (instructp + length);
344 * it looked like a calls,
345 * but it wasn't to anywhere.
351 * something funny going on.
353 DBG (CALLDEBUG, printf ("[findcall]\tbut it's a botch\n"));