From 252b5132c753830d5fd56823373aed85f2a0db63 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Mon, 3 May 1999 07:29:11 +0000 Subject: 19990502 sourceware import --- binutils/coffgrok.c | 737 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 737 insertions(+) create mode 100644 binutils/coffgrok.c (limited to 'binutils/coffgrok.c') diff --git a/binutils/coffgrok.c b/binutils/coffgrok.c new file mode 100644 index 0000000..8c4e6c9 --- /dev/null +++ b/binutils/coffgrok.c @@ -0,0 +1,737 @@ +/* coffgrok.c + Copyright (C) 1994, 95, 97, 1998 Free Software Foundation, Inc. + +This file is part of GNU Binutils. + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +/* Written by Steve Chamberlain (sac@cygnus.com) + + This module reads a coff file and builds a really simple type tree + which can be read by other programs. The first application is a + coff->sysroff converter. It can be tested with coffdump.c. + +*/ + +#include +#include "bucomm.h" + +#include "coff/internal.h" +#include "../bfd/libcoff.h" +#include "coffgrok.h" +int lofile = 1; +static struct coff_scope *top_scope; +static struct coff_scope *file_scope; +static struct coff_ofile *ofile; + +struct coff_symbol *last_function_symbol; +struct coff_type *last_function_type; +struct coff_type *last_struct; +struct coff_type *last_enum; +struct coff_sfile *cur_sfile; + +static struct coff_symbol **tindex; + + +static asymbol **syms; +static long symcount; + +#define N(x) ((x)->_n._n_nptr[1]) + +static struct coff_ptr_struct *rawsyms; +static int rawcount; +static bfd *abfd; +extern char *xcalloc (); +#define PTR_SIZE 4 +#define SHORT_SIZE 2 +#define INT_SIZE 4 +#define LONG_SIZE 4 +#define FLOAT_SIZE 4 +#define DOUBLE_SIZE 8 + +#define INDEXOF(p) ((struct coff_ptr_struct *)(p)-(rawsyms)) + +static struct coff_scope * +empty_scope () +{ + struct coff_scope *l; + l = (struct coff_scope *) (xcalloc (sizeof (struct coff_scope), 1)); + return l; +} + +static struct coff_symbol * +empty_symbol () +{ + return (struct coff_symbol *) (xcalloc (sizeof (struct coff_symbol), 1)); +} + +/*int l;*/ +static void +push_scope (link) + int link; +{ + struct coff_scope *n = empty_scope (); + if (link) + { + if (top_scope) + { + if (top_scope->list_tail) + { + top_scope->list_tail->next = n; + } + else + { + top_scope->list_head = n; + } + top_scope->list_tail = n; + } + } + n->parent = top_scope; + + top_scope = n; +} + +static void +pop_scope () +{ + top_scope = top_scope->parent; +} + +static void +do_sections_p1 (head) + struct coff_ofile *head; +{ + asection *section; + int idx; + struct coff_section *all = (struct coff_section *) (xcalloc (abfd->section_count + 1, + sizeof (struct coff_section))); + head->nsections = abfd->section_count + 1; + head->sections = all; + + for (idx = 0, section = abfd->sections; section; section = section->next, idx++) + { + long relsize; + int i = section->target_index; + arelent **relpp; + long relcount; + + relsize = bfd_get_reloc_upper_bound (abfd, section); + if (relsize < 0) + bfd_fatal (bfd_get_filename (abfd)); + if (relsize == 0) + continue; + relpp = (arelent **) xmalloc (relsize); + relcount = bfd_canonicalize_reloc (abfd, section, relpp, syms); + if (relcount < 0) + bfd_fatal (bfd_get_filename (abfd)); + + head->sections[i].name = (char *) (section->name); + head->sections[i].code = section->flags & SEC_CODE; + head->sections[i].data = section->flags & SEC_DATA; + if (strcmp (section->name, ".bss") == 0) + head->sections[i].data = 1; + head->sections[i].address = section->lma; + head->sections[i].size = section->_raw_size; + head->sections[i].number = idx; + head->sections[i].nrelocs = section->reloc_count; + head->sections[i].relocs = + (struct coff_reloc *) (xcalloc (section->reloc_count, + sizeof (struct coff_reloc))); + head->sections[i].bfd_section = section; + } + head->sections[0].name = "ABSOLUTE"; + head->sections[0].code = 0; + head->sections[0].data = 0; + head->sections[0].address = 0; + head->sections[0].size = 0; + head->sections[0].number = 0; +} + +static void +do_sections_p2 (head) + struct coff_ofile *head; +{ + asection *section; + for (section = abfd->sections; section; section = section->next) + { + unsigned int j; + + for (j = 0; j < section->reloc_count; j++) + { + int idx; + int i = section->target_index; + struct coff_reloc *r = head->sections[i].relocs + j; + arelent *sr = section->relocation + j; + r->offset = sr->address; + r->addend = sr->addend; + idx = ((coff_symbol_type *) (sr->sym_ptr_ptr[0]))->native - rawsyms; + r->symbol = tindex[idx]; + } + } +} + +static struct coff_where * +do_where (i) + int i; +{ + struct internal_syment *sym = &rawsyms[i].u.syment; + struct coff_where *where = + (struct coff_where *) (xmalloc (sizeof (struct coff_where))); + where->offset = sym->n_value; + + if (sym->n_scnum == -1) + sym->n_scnum = 0; + + switch (sym->n_sclass) + { + case C_FIELD: + where->where = coff_where_member_of_struct; + where->offset = sym->n_value / 8; + where->bitoffset = sym->n_value % 8; + where->bitsize = rawsyms[i + 1].u.auxent.x_sym.x_misc.x_lnsz.x_size; + break; + case C_MOE: + where->where = coff_where_member_of_enum; + break; + case C_MOS: + case C_MOU: + where->where = coff_where_member_of_struct; + break; + case C_AUTO: + case C_ARG: + where->where = coff_where_stack; + break; + case C_EXT: + case C_STAT: + case C_EXTDEF: + case C_LABEL: + where->where = coff_where_memory; + where->section = &ofile->sections[sym->n_scnum]; + break; + case C_REG: + case C_REGPARM: + where->where = coff_where_register; + break; + case C_ENTAG: + where->where = coff_where_entag; + break; + case C_STRTAG: + case C_UNTAG: + where->where = coff_where_strtag; + break; + case C_TPDEF: + where->where = coff_where_typedef; + break; + default: + abort (); + break; + } + return where; +} + +static +struct coff_line * +do_lines (i, name) + int i; + char *name; +{ + struct coff_line *res = (struct coff_line *) xcalloc (sizeof (struct coff_line), 1); + asection *s; + unsigned int l; + + /* Find out if this function has any line numbers in the table */ + for (s = abfd->sections; s; s = s->next) + { + for (l = 0; l < s->lineno_count; l++) + { + if (s->lineno[l].line_number == 0) + { + if (rawsyms + i == ((coff_symbol_type *) (&(s->lineno[l].u.sym[0])))->native) + { + /* These lines are for this function - so count them and stick them on */ + int c = 0; + /* Find the linenumber of the top of the function, since coff linenumbers + are relative to the start of the function. */ + int start_line = rawsyms[i + 3].u.auxent.x_sym.x_misc.x_lnsz.x_lnno; + + l++; + for (c = 0; s->lineno[l + c + 1].line_number; c++) + ; + + /* Add two extra records, one for the prologue and one for the epilogue */ + c += 1; + res->nlines = c; + res->lines = (int *) (xcalloc (sizeof (int), c)); + res->addresses = (int *) (xcalloc (sizeof (int), c)); + res->lines[0] = start_line; + res->addresses[0] = rawsyms[i].u.syment.n_value - s->vma; + for (c = 0; s->lineno[l + c + 1].line_number; c++) + { + res->lines[c + 1] = s->lineno[l + c].line_number + start_line - 1; + res->addresses[c + 1] = s->lineno[l + c].u.offset; + } + return res; + } + } + } + } + return res; +} + +static +struct coff_type * +do_type (i) + int i; +{ + struct internal_syment *sym = &rawsyms[i].u.syment; + union internal_auxent *aux = &rawsyms[i + 1].u.auxent; + struct coff_type *res = + (struct coff_type *) xmalloc (sizeof (struct coff_type)); + int type = sym->n_type; + int which_dt = 0; + int dimind = 0; + + res->type = coff_basic_type; + res->u.basic = type & 0xf; + + switch (type & 0xf) + { + case T_NULL: + case T_VOID: + if (sym->n_numaux && sym->n_sclass == C_STAT) + { + /* This is probably a section definition */ + res->type = coff_secdef_type; + res->size = aux->x_scn.x_scnlen; + } + else + { + if (type == 0) + { + /* Don't know what this is, let's make it a simple int */ + res->size = INT_SIZE; + res->u.basic = T_UINT; + } + else + { + /* Else it could be a function or pointer to void */ + res->size = 0; + } + } + break; + + + break; + case T_UCHAR: + case T_CHAR: + res->size = 1; + break; + case T_USHORT: + case T_SHORT: + res->size = SHORT_SIZE; + break; + case T_UINT: + case T_INT: + res->size = INT_SIZE; + break; + case T_ULONG: + case T_LONG: + res->size = LONG_SIZE; + break; + case T_FLOAT: + res->size = FLOAT_SIZE; + break; + case T_DOUBLE: + res->size = DOUBLE_SIZE; + break; + case T_STRUCT: + case T_UNION: + if (sym->n_numaux) + { + if (aux->x_sym.x_tagndx.p) + { + /* Refering to a struct defined elsewhere */ + res->type = coff_structref_type; + res->u.astructref.ref = tindex[INDEXOF (aux->x_sym.x_tagndx.p)]; + res->size = res->u.astructref.ref ? + res->u.astructref.ref->type->size : 0; + } + else + { + /* A definition of a struct */ + last_struct = res; + res->type = coff_structdef_type; + res->u.astructdef.elements = empty_scope (); + res->u.astructdef.idx = 0; + res->u.astructdef.isstruct = (type & 0xf) == T_STRUCT; + res->size = aux->x_sym.x_misc.x_lnsz.x_size; + } + } + else + { + /* No auxents - it's anonynmous */ + res->type = coff_structref_type; + res->u.astructref.ref = 0; + res->size = 0; + } + break; + case T_ENUM: + if (aux->x_sym.x_tagndx.p) + { + /* Refering to a enum defined elsewhere */ + res->type = coff_enumref_type; + res->u.aenumref.ref = tindex[INDEXOF (aux->x_sym.x_tagndx.p)]; + res->size = res->u.aenumref.ref->type->size; + } + else + { + /* A definition of an enum */ + last_enum = res; + res->type = coff_enumdef_type; + res->u.aenumdef.elements = empty_scope (); + res->size = aux->x_sym.x_misc.x_lnsz.x_size; + } + break; + case T_MOE: + break; + } + + for (which_dt = 5; which_dt >= 0; which_dt--) + { + switch ((type >> ((which_dt * 2) + 4)) & 0x3) + { + case 0: + break; + case DT_ARY: + { + struct coff_type *ptr = ((struct coff_type *) + xmalloc (sizeof (struct coff_type))); + int els = (dimind < DIMNUM + ? aux->x_sym.x_fcnary.x_ary.x_dimen[dimind] + : 0); + ++dimind; + ptr->type = coff_array_type; + ptr->size = els * res->size; + ptr->u.array.dim = els; + ptr->u.array.array_of = res; + res = ptr; + break; + } + case DT_PTR: + { + struct coff_type *ptr = + (struct coff_type *) xmalloc (sizeof (struct coff_type)); + ptr->size = PTR_SIZE; + ptr->type = coff_pointer_type; + ptr->u.pointer.points_to = res; + res = ptr; + break; + } + case DT_FCN: + { + struct coff_type *ptr + = (struct coff_type *) xmalloc (sizeof (struct coff_type)); + ptr->size = 0; + ptr->type = coff_function_type; + ptr->u.function.function_returns = res; + ptr->u.function.parameters = empty_scope (); + ptr->u.function.lines = do_lines (i, sym->_n._n_nptr[1]); + ptr->u.function.code = 0; + last_function_type = ptr; + res = ptr; + break; + } + } + } + return res; +} + +static struct coff_visible * +do_visible (i) + int i; +{ + struct internal_syment *sym = &rawsyms[i].u.syment; + struct coff_visible *visible = + (struct coff_visible *) (xmalloc (sizeof (struct coff_visible))); + enum coff_vis_type t; + switch (sym->n_sclass) + { + case C_MOS: + case C_MOU: + case C_FIELD: + t = coff_vis_member_of_struct; + break; + case C_MOE: + t = coff_vis_member_of_enum; + break; + + case C_REGPARM: + t = coff_vis_regparam; + break; + + case C_REG: + t = coff_vis_register; + break; + case C_STRTAG: + case C_UNTAG: + case C_ENTAG: + case C_TPDEF: + t = coff_vis_tag; + break; + case C_AUTOARG: + case C_ARG: + t = coff_vis_autoparam; + break; + case C_AUTO: + + + t = coff_vis_auto; + break; + case C_LABEL: + case C_STAT: + t = coff_vis_int_def; + break; + case C_EXT: + if (sym->n_scnum == N_UNDEF) + { + if (sym->n_value) + t = coff_vis_common; + else + t = coff_vis_ext_ref; + } + else + t = coff_vis_ext_def; + break; + default: + abort (); + break; + + } + visible->type = t; + return visible; +} + +static int +do_define (i, b) + int i; + struct coff_scope *b; +{ + static int symbol_index; + struct internal_syment *sym = &rawsyms[i].u.syment; + + /* Define a symbol and attach to block b */ + struct coff_symbol *s = empty_symbol (); + + s->number = ++symbol_index; + s->name = sym->_n._n_nptr[1]; + s->sfile = cur_sfile; + /* Glue onto the ofile list */ + if (lofile >= 0) + { + if (ofile->symbol_list_tail) + ofile->symbol_list_tail->next_in_ofile_list = s; + else + ofile->symbol_list_head = s; + ofile->symbol_list_tail = s; + /* And the block list */ + } + if (b->vars_tail) + b->vars_tail->next = s; + else + b->vars_head = s; + + b->vars_tail = s; + b->nvars++; + s->type = do_type (i); + s->where = do_where (i); + s->visible = do_visible (i); + + tindex[i] = s; + + /* We remember the lowest address in each section for each source file */ + + if (s->where->where == coff_where_memory + && s->type->type == coff_secdef_type) + { + struct coff_isection *is = cur_sfile->section + s->where->section->number; + + if (!is->init) + { + is->low = s->where->offset; + is->high = s->where->offset + s->type->size; + is->init = 1; + is->parent = s->where->section; + } + + } + + if (s->type->type == coff_function_type) + last_function_symbol = s; + + return i + sym->n_numaux + 1; +} + + +static +struct coff_ofile * +doit () +{ + int i; + int infile = 0; + struct coff_ofile *head = + (struct coff_ofile *) xmalloc (sizeof (struct coff_ofile)); + ofile = head; + head->source_head = 0; + head->source_tail = 0; + head->nsources = 0; + head->symbol_list_tail = 0; + head->symbol_list_head = 0; + do_sections_p1 (head); + push_scope (1); + + for (i = 0; i < rawcount;) + { + struct internal_syment *sym = &rawsyms[i].u.syment; + switch (sym->n_sclass) + { + case C_FILE: + { + /* new source file announced */ + struct coff_sfile *n = + (struct coff_sfile *) xmalloc (sizeof (struct coff_sfile)); + n->section = (struct coff_isection *) xcalloc (sizeof (struct coff_isection), abfd->section_count + 1); + cur_sfile = n; + n->name = sym->_n._n_nptr[1]; + n->next = 0; + + if (infile) + { + pop_scope (); + } + infile = 1; + push_scope (1); + file_scope = n->scope = top_scope; + + if (head->source_tail) + head->source_tail->next = n; + else + head->source_head = n; + head->source_tail = n; + head->nsources++; + i += sym->n_numaux + 1; + } + break; + case C_FCN: + { + char *name = sym->_n._n_nptr[1]; + if (name[1] == 'b') + { + /* Function start */ + push_scope (0); + last_function_type->u.function.code = top_scope; + top_scope->sec = ofile->sections + sym->n_scnum; + top_scope->offset = sym->n_value; + } + else + { + top_scope->size = sym->n_value - top_scope->offset + 1; + pop_scope (); + + } + i += sym->n_numaux + 1; + } + break; + + case C_BLOCK: + { + char *name = sym->_n._n_nptr[1]; + if (name[1] == 'b') + { + /* Block start */ + push_scope (1); + top_scope->sec = ofile->sections + sym->n_scnum; + top_scope->offset = sym->n_value; + + } + else + { + top_scope->size = sym->n_value - top_scope->offset + 1; + pop_scope (); + } + i += sym->n_numaux + 1; + } + break; + case C_REGPARM: + case C_ARG: + i = do_define (i, last_function_symbol->type->u.function.parameters); + break; + case C_MOS: + case C_MOU: + case C_FIELD: + i = do_define (i, last_struct->u.astructdef.elements); + break; + case C_MOE: + i = do_define (i, last_enum->u.aenumdef.elements); + break; + case C_STRTAG: + case C_ENTAG: + case C_UNTAG: + /* Various definition */ + i = do_define (i, top_scope); + break; + case C_EXT: + case C_LABEL: + i = do_define (i, file_scope); + break; + case C_STAT: + case C_TPDEF: + case C_AUTO: + case C_REG: + i = do_define (i, top_scope); + break; + default: + abort (); + case C_EOS: + i += sym->n_numaux + 1; + break; + } + } + do_sections_p2 (head); + return head; +} + +struct coff_ofile * +coff_grok (inabfd) + bfd *inabfd; +{ + long storage; + struct coff_ofile *p; + abfd = inabfd; + storage = bfd_get_symtab_upper_bound (abfd); + + if (storage < 0) + bfd_fatal (abfd->filename); + + syms = (asymbol **) xmalloc (storage); + symcount = bfd_canonicalize_symtab (abfd, syms); + if (symcount < 0) + bfd_fatal (abfd->filename); + rawsyms = obj_raw_syments (abfd); + rawcount = obj_raw_syment_count (abfd);; + tindex = (struct coff_symbol **) (xcalloc (sizeof (struct coff_symbol *), rawcount)); + + p = doit (); + return p; +} -- cgit v1.1