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author | Steve Chamberlain <sac@cygnus> | 1992-01-24 18:41:32 +0000 |
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committer | Steve Chamberlain <sac@cygnus> | 1992-01-24 18:41:32 +0000 |
commit | c611e285bd68ba6f2fa2f3063a002ace9b8f626f (patch) | |
tree | 272c4535b946c99f584949cab1277279323abfa1 /ld/ldexp.c | |
parent | f5e8a8f9c7213183a8e7a261cd74687c3dff335f (diff) | |
download | gdb-c611e285bd68ba6f2fa2f3063a002ace9b8f626f.zip gdb-c611e285bd68ba6f2fa2f3063a002ace9b8f626f.tar.gz gdb-c611e285bd68ba6f2fa2f3063a002ace9b8f626f.tar.bz2 |
Merging from VMS port. Doc to follow..
Diffstat (limited to 'ld/ldexp.c')
-rw-r--r-- | ld/ldexp.c | 537 |
1 files changed, 279 insertions, 258 deletions
@@ -1,10 +1,12 @@ -/* Copyright (C) 1991 Free Software Foundation, Inc. +/* This module handles expression trees. +Copyright (C) 1991 Free Software Foundation, Inc. +Written by Steve Chamberlain of Cygnus Support (sac@cygnus.com). This file is part of GLD, the Gnu Linker. GLD 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 1, or (at your option) +the Free Software Foundation; either version 2, or (at your option) any later version. GLD is distributed in the hope that it will be useful, @@ -17,25 +19,23 @@ along with GLD; see the file COPYING. If not, write to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ /* - $Id$ -*/ +This module is in charge of working out the contents of expressions. -/* - * Written by Steve Chamberlain - * steve@cygnus.com - * - * This module handles expression trees. - */ +It has to keep track of the relative/absness of a symbol etc. This is +done by keeping all values in a struct (an etree_value_type) which +contains a value, a section to which it is relative and a valid bit. + +*/ -#include "sysdep.h" #include "bfd.h" +#include "sysdep.h" #include "ld.h" #include "ldmain.h" #include "ldmisc.h" #include "ldexp.h" -#include "ldgram.tab.h" +#include "ldgram.h" #include "ldsym.h" #include "ldlang.h" @@ -43,7 +43,7 @@ extern char *output_filename; extern unsigned int undefined_global_sym_count; extern unsigned int defined_global_sym_count; extern bfd *output_bfd; -extern size_t largest_section; +extern bfd_size_type largest_section; extern lang_statement_list_type file_chain; extern args_type command_line; extern ld_config_type config; @@ -55,55 +55,55 @@ extern bfd_vma print_dot; static void -exp_print_token(outfile, code) -FILE *outfile; -token_code_type code; +DEFUN(exp_print_token,(outfile, code), + FILE *outfile AND + token_code_type code) { static struct { token_code_type code; char *name; } table[] = - { - INT, "int", - NAME,"NAME", - PLUSEQ,"+=", - MINUSEQ,"-=", - MULTEQ,"*=", - DIVEQ,"/=", - LSHIFTEQ,"<<=", - RSHIFTEQ,">>=", - ANDEQ,"&=", - OREQ,"|=", - OROR,"||", - ANDAND,"&&", - EQ,"==", - NE,"!=", - LE,"<=", - GE,">=", - LSHIFT,"<<", - RSHIFT,">>=", - ALIGN_K,"ALIGN", - BLOCK,"BLOCK", - SECTIONS,"SECTIONS", - SIZEOF_HEADERS,"SIZEOF_HEADERS", - NEXT,"NEXT", - SIZEOF,"SIZEOF", - ADDR,"ADDR", - MEMORY,"MEMORY", - - - - - - DEFINED,"DEFINED", - TARGET_K,"TARGET", - SEARCH_DIR,"SEARCH_DIR", - MAP,"MAP", - LONG,"LONG", - SHORT,"SHORT", - BYTE,"BYTE", - ENTRY,"ENTRY", - 0,(char *)NULL} ; + { + INT, "int", + NAME,"NAME", + PLUSEQ,"+=", + MINUSEQ,"-=", + MULTEQ,"*=", + DIVEQ,"/=", + LSHIFTEQ,"<<=", + RSHIFTEQ,">>=", + ANDEQ,"&=", + OREQ,"|=", + OROR,"||", + ANDAND,"&&", + EQ,"==", + NE,"!=", + LE,"<=", + GE,">=", + LSHIFT,"<<", + RSHIFT,">>=", + ALIGN_K,"ALIGN", + BLOCK,"BLOCK", + SECTIONS,"SECTIONS", + SIZEOF_HEADERS,"SIZEOF_HEADERS", + NEXT,"NEXT", + SIZEOF,"SIZEOF", + ADDR,"ADDR", + MEMORY,"MEMORY", + + + + + + DEFINED,"DEFINED", + TARGET_K,"TARGET", + SEARCH_DIR,"SEARCH_DIR", + MAP,"MAP", + LONG,"LONG", + SHORT,"SHORT", + BYTE,"BYTE", + ENTRY,"ENTRY", + 0,(char *)NULL} ; @@ -119,8 +119,8 @@ token_code_type code; } static void -make_abs(ptr) -etree_value_type *ptr; +DEFUN(make_abs,(ptr), + etree_value_type *ptr) { if (ptr->section != (lang_output_section_statement_type *)NULL) { asection *s = ptr->section->bfd_section; @@ -129,9 +129,10 @@ etree_value_type *ptr; } } + static -etree_value_type new_abs(value) -bfd_vma value; +DEFUN(etree_value_type new_abs,(value), + bfd_vma value) { etree_value_type new; new.valid = true; @@ -147,17 +148,18 @@ DEFUN(check, (os, name, op), CONST char *op) { if (os == (lang_output_section_statement_type *)NULL) { - info("%F%P %s uses undefined section %s\n", op, name); + einfo("%F%P %s uses undefined section %s\n", op, name); } if (os->processed == false) { - info("%F%P %s forward reference of section %s\n",op, name); + einfo("%F%P %s forward reference of section %s\n",op, name); } } -etree_type *exp_intop(value) -bfd_vma value; +etree_type * +DEFUN(exp_intop,(value), + bfd_vma value) { - etree_type *new = (etree_type *)ldmalloc(sizeof(new->value)); + etree_type *new = (etree_type *)ldmalloc((bfd_size_type)(sizeof(new->value))); new->type.node_code = INT; new->value.value = value; new->type.node_class = etree_value; @@ -167,9 +169,9 @@ bfd_vma value; static -etree_value_type new_rel(value, section) -bfd_vma value; -lang_output_section_statement_type *section; +DEFUN(etree_value_type new_rel,(value, section), + bfd_vma value AND + lang_output_section_statement_type *section) { etree_value_type new; new.valid = true; @@ -179,9 +181,10 @@ lang_output_section_statement_type *section; } static -etree_value_type new_rel_from_section(value, section) -bfd_vma value; -lang_output_section_statement_type *section; +DEFUN(etree_value_type + new_rel_from_section, (value, section), + bfd_vma value AND + lang_output_section_statement_type *section) { etree_value_type new; new.valid = true; @@ -194,12 +197,12 @@ lang_output_section_statement_type *section; } static etree_value_type -fold_binary(tree, current_section, allocation_done, dot, dotp) -etree_type *tree; -lang_output_section_statement_type *current_section; -lang_phase_type allocation_done; -bfd_vma dot; -bfd_vma *dotp; +DEFUN(fold_binary,(tree, current_section, allocation_done, dot, dotp), + etree_type *tree AND + lang_output_section_statement_type *current_section AND + lang_phase_type allocation_done AND + bfd_vma dot AND + bfd_vma *dotp) { etree_value_type result; @@ -226,13 +229,13 @@ bfd_vma *dotp; /* Mod, both absolule*/ if (other.value == 0) { - info("%F%S % by zero\n"); + einfo("%F%S % by zero\n"); } result.value %= other.value; break; case '/': if (other.value == 0) { - info("%F%S / by zero\n"); + einfo("%F%S / by zero\n"); } result.value /= other.value; break; @@ -263,19 +266,20 @@ bfd_vma *dotp; } return result; } -etree_value_type invalid() +etree_value_type +DEFUN_VOID(invalid) { etree_value_type new; new.valid = false; return new; } -etree_value_type fold_name(tree, current_section, allocation_done, dot) -etree_type *tree; -lang_output_section_statement_type *current_section; -lang_phase_type allocation_done; -bfd_vma dot; - +etree_value_type +DEFUN(fold_name, (tree, current_section, allocation_done, dot), + etree_type *tree AND + lang_output_section_statement_type *current_section AND + lang_phase_type allocation_done AND + bfd_vma dot) { etree_value_type result; switch (tree->type.node_code) @@ -341,7 +345,7 @@ bfd_vma dot; } } if (result.valid == false) { - info("%F%S: undefined symbol `%s' referenced in expression.\n", + einfo("%F%S: undefined symbol `%s' referenced in expression.\n", tree->name.name); } @@ -367,7 +371,7 @@ bfd_vma dot; lang_output_section_statement_type *os = lang_output_section_find(tree->name.name); check(os,tree->name.name,"SIZEOF"); - result = new_abs((bfd_vma)(os->bfd_section->size)); + result = new_abs((bfd_vma)(os->bfd_section->_raw_size)); } else { result = invalid(); @@ -381,118 +385,119 @@ bfd_vma dot; return result; } -etree_value_type exp_fold_tree(tree, current_section, allocation_done, - dot, dotp) -etree_type *tree; -lang_output_section_statement_type *current_section; -lang_phase_type allocation_done; -bfd_vma dot; -bfd_vma *dotp; +etree_value_type +DEFUN(exp_fold_tree,(tree, current_section, allocation_done, + dot, dotp), + etree_type *tree AND + lang_output_section_statement_type *current_section AND + lang_phase_type allocation_done AND + bfd_vma dot AND + bfd_vma *dotp) { etree_value_type result; if (tree == (etree_type *)NULL) { - result.valid = false; - } + result.valid = false; + } else { - switch (tree->type.node_class) + switch (tree->type.node_class) + { + case etree_value: + result = new_rel(tree->value.value, current_section); + break; + case etree_unary: + result = exp_fold_tree(tree->unary.child, + current_section, + allocation_done, dot, dotp); + if (result.valid == true) { - case etree_value: - result = new_rel(tree->value.value, current_section); - break; - case etree_unary: - result = exp_fold_tree(tree->unary.child, - current_section, - allocation_done, dot, dotp); - if (result.valid == true) - { - switch(tree->type.node_code) - { - case ALIGN_K: - if (allocation_done != lang_first_phase_enum) { - result = new_rel_from_section(ALIGN(dot, - result.value) , - current_section); + switch(tree->type.node_code) + { + case ALIGN_K: + if (allocation_done != lang_first_phase_enum) { + result = new_rel_from_section(ALIGN(dot, + result.value) , + current_section); - } - else { - result.valid = false; - } - break; - case '~': - make_abs(&result); - result.value = ~result.value; - break; - case '!': - make_abs(&result); - result.value = !result.value; - break; - case '-': - make_abs(&result); - result.value = -result.value; - break; - case NEXT: - if (allocation_done ==lang_allocating_phase_enum) { - make_abs(&result); - result.value = ALIGN(dot, result.value); - } - else { - /* Return next place aligned to value */ - result.valid = false; - } - break; - default: - FAIL(); - } } + else { + result.valid = false; + } + break; + case '~': + make_abs(&result); + result.value = ~result.value; + break; + case '!': + make_abs(&result); + result.value = !result.value; + break; + case '-': + make_abs(&result); + result.value = -result.value; + break; + case NEXT: + if (allocation_done ==lang_allocating_phase_enum) { + make_abs(&result); + result.value = ALIGN(dot, result.value); + } + else { + /* Return next place aligned to value */ + result.valid = false; + } + break; + default: + FAIL(); + } + } - break; - case etree_trinary: + break; + case etree_trinary: - result = exp_fold_tree(tree->trinary.cond, - current_section, - allocation_done, dot, dotp); - if (result.valid) { + result = exp_fold_tree(tree->trinary.cond, + current_section, + allocation_done, dot, dotp); + if (result.valid) { result = exp_fold_tree(result.value ? tree->trinary.lhs:tree->trinary.rhs, current_section, allocation_done, dot, dotp); } - break; - case etree_binary: - result = fold_binary(tree, current_section, allocation_done, - dot, dotp); - break; - case etree_assign: - if (tree->assign.dst[0] == '.' && tree->assign.dst[1] == 0) { + break; + case etree_binary: + result = fold_binary(tree, current_section, allocation_done, + dot, dotp); + break; + case etree_assign: + if (tree->assign.dst[0] == '.' && tree->assign.dst[1] == 0) { /* Assignment to dot can only be done during allocation */ if (allocation_done == lang_allocating_phase_enum) { - result = exp_fold_tree(tree->assign.src, - current_section, - lang_allocating_phase_enum, dot, dotp); - if (result.valid == false) { - info("%F%S invalid assignment to location counter\n"); - } - else { - if (current_section == - (lang_output_section_statement_type *)NULL) { - info("%F%S assignment to location counter invalid outside of SECTION\n"); - } - else { - unsigned long nextdot =result.value + - current_section->bfd_section->vma; - if (nextdot < dot) { - info("%F%S cannot move location counter backwards"); + result = exp_fold_tree(tree->assign.src, + current_section, + lang_allocating_phase_enum, dot, dotp); + if (result.valid == false) { + einfo("%F%S invalid assignment to location counter\n"); } - else { - *dotp = nextdot; + else { + if (current_section == + (lang_output_section_statement_type *)NULL) { + einfo("%F%S assignment to location counter invalid outside of SECTION\n"); + } + else { + unsigned long nextdot =result.value + + current_section->bfd_section->vma; + if (nextdot < dot) { + einfo("%F%S cannot move location counter backwards"); + } + else { + *dotp = nextdot; + } + } } - } } - } } - else { + else { ldsym_type *sy = ldsym_get(tree->assign.dst); /* If this symbol has just been created then we'll place it into @@ -502,74 +507,89 @@ bfd_vma *dotp; current_section, allocation_done, dot, dotp); if (result.valid) - { - asymbol *def; - asymbol **def_ptr = (asymbol **)ldmalloc(sizeof(asymbol **)); - /* Add this definition to script file */ - def = (asymbol *)bfd_make_empty_symbol(script_file->the_bfd); - *def_ptr = def; - - - def->value = result.value; - if (result.section != - (lang_output_section_statement_type *)NULL) { - if (current_section != - (lang_output_section_statement_type *)NULL) { + { + asymbol *def; + asymbol **def_ptr ; + /* Add this definition to script file */ + if (sy->sdefs_chain) + { + def_ptr = sy->sdefs_chain; + def = *def_ptr; + + } + else + { + def_ptr = (asymbol **)ldmalloc((bfd_size_type)(sizeof(asymbol **))); + def = (asymbol + *)bfd_make_empty_symbol(script_file->the_bfd); + + + + *def_ptr = def; + } + + def->value = result.value; + if (result.section != + (lang_output_section_statement_type *)NULL) { + if (current_section != + (lang_output_section_statement_type *)NULL) { def->section = result.section->bfd_section; def->flags = BSF_GLOBAL | BSF_EXPORT; } - else { + else { /* Force to absolute */ def->value += result.section->bfd_section->vma; - def->section = (asection *)NULL; - def->flags = BSF_GLOBAL | BSF_EXPORT | BSF_ABSOLUTE; + def->section = &bfd_abs_section; + def->flags = BSF_GLOBAL | BSF_EXPORT ; } - } - else { - def->section = (asection *)NULL; - def->flags = BSF_GLOBAL | BSF_EXPORT | BSF_ABSOLUTE; - } + } + else { + def->section = &bfd_abs_section; + def->flags = BSF_GLOBAL | BSF_EXPORT ; + } - def->udata = (PTR)NULL; - def->name = sy->name; - Q_enter_global_ref(def_ptr); - } + def->udata = (PTR)NULL; + def->name = sy->name; + + if (sy->sdefs_chain == 0) Q_enter_global_ref(def_ptr); + } } - break; - case etree_name: - result = fold_name(tree, current_section, allocation_done, dot); - break; - default: - info("%F%S Need more of these %d",tree->type.node_class ); + break; + case etree_name: + result = fold_name(tree, current_section, allocation_done, dot); + break; + default: + einfo("%F%S Need more of these %d",tree->type.node_class ); - } - } + } + } return result; } -etree_value_type exp_fold_tree_no_dot(tree, current_section, allocation_done) -etree_type *tree; -lang_output_section_statement_type *current_section; -lang_phase_type allocation_done; +etree_value_type +DEFUN(exp_fold_tree_no_dot,(tree, current_section, allocation_done), + etree_type *tree AND + lang_output_section_statement_type *current_section AND + lang_phase_type allocation_done) { return exp_fold_tree(tree, current_section, allocation_done, (bfd_vma) 0, (bfd_vma *)NULL); } etree_type * -exp_binop(code, lhs, rhs) -int code; -etree_type *lhs; -etree_type *rhs; +DEFUN(exp_binop,(code, lhs, rhs), + int code AND + etree_type *lhs AND + etree_type *rhs) { etree_type value, *new; etree_value_type r; @@ -584,17 +604,17 @@ etree_type *rhs; { return exp_intop(r.value); } - new = (etree_type *)ldmalloc(sizeof(new->binary)); + new = (etree_type *)ldmalloc((bfd_size_type)(sizeof(new->binary))); memcpy((char *)new, (char *)&value, sizeof(new->binary)); return new; } etree_type * -exp_trinop(code, cond, lhs, rhs) -int code; -etree_type *cond; -etree_type *lhs; -etree_type *rhs; +DEFUN(exp_trinop,(code, cond, lhs, rhs), + int code AND + etree_type *cond AND + etree_type *lhs AND + etree_type *rhs) { etree_type value, *new; etree_value_type r; @@ -608,16 +628,16 @@ etree_type *rhs; if (r.valid) { return exp_intop(r.value); } - new = (etree_type *)ldmalloc(sizeof(new->trinary)); + new = (etree_type *)ldmalloc((bfd_size_type)(sizeof(new->trinary))); memcpy((char *)new,(char *) &value, sizeof(new->trinary)); return new; } etree_type * -exp_unop(code, child) -int code; -etree_type *child; +DEFUN(exp_unop,(code, child), + int code AND + etree_type *child) { etree_type value, *new; @@ -625,21 +645,21 @@ etree_type *child; value.unary.type.node_code = code; value.unary.child = child; value.unary.type.node_class = etree_unary; -r = exp_fold_tree_no_dot(&value,(lang_output_section_statement_type *)NULL, - lang_first_phase_enum); -if (r.valid) { + r = exp_fold_tree_no_dot(&value,(lang_output_section_statement_type *)NULL, + lang_first_phase_enum); + if (r.valid) { return exp_intop(r.value); } - new = (etree_type *)ldmalloc(sizeof(new->unary)); + new = (etree_type *)ldmalloc((bfd_size_type)(sizeof(new->unary))); memcpy((char *)new, (char *)&value, sizeof(new->unary)); return new; } etree_type * -exp_nameop(code, name) -int code; -char *name; +DEFUN(exp_nameop,(code, name), + int code AND + CONST char *name) { etree_type value, *new; @@ -655,7 +675,7 @@ char *name; if (r.valid) { return exp_intop(r.value); } - new = (etree_type *)ldmalloc(sizeof(new->name)); + new = (etree_type *)ldmalloc((bfd_size_type)(sizeof(new->name))); memcpy((char *)new, (char *)&value, sizeof(new->name)); return new; @@ -665,10 +685,10 @@ char *name; etree_type * -exp_assop(code, dst, src) -int code; -char *dst; -etree_type *src; +DEFUN(exp_assop,(code, dst, src), + int code AND + CONST char *dst AND + etree_type *src) { etree_type value, *new; @@ -684,20 +704,21 @@ etree_type *src; return exp_intop(result); } #endif - new = (etree_type*)ldmalloc(sizeof(new->assign)); + new = (etree_type*)ldmalloc((bfd_size_type)(sizeof(new->assign))); memcpy((char *)new, (char *)&value, sizeof(new->assign)); return new; } void -exp_print_tree(outfile, tree) -FILE *outfile; -etree_type *tree; +DEFUN(exp_print_tree,(outfile, tree), + FILE *outfile AND + etree_type *tree) { switch (tree->type.node_class) { case etree_value: - fprintf(outfile,"0x%08lx",(bfd_vma)(tree->value.value)); + print_address(tree->value.value); return; + case etree_assign: #if 0 if (tree->assign.dst->sdefs != (asymbol *)NULL){ @@ -752,11 +773,11 @@ etree_type *tree; bfd_vma -exp_get_vma(tree, def, name, allocation_done) -etree_type *tree; -bfd_vma def; -char *name; -lang_phase_type allocation_done; +DEFUN(exp_get_vma,(tree, def, name, allocation_done), + etree_type *tree AND + bfd_vma def AND + char *name AND + lang_phase_type allocation_done) { etree_value_type r; @@ -765,7 +786,7 @@ lang_phase_type allocation_done; (lang_output_section_statement_type *)NULL, allocation_done); if (r.valid == false && name) { - info("%F%S Nonconstant expression for %s\n",name); + einfo("%F%S Nonconstant expression for %s\n",name); } return r.value; } @@ -775,11 +796,11 @@ lang_phase_type allocation_done; } int -exp_get_value_int(tree,def,name, allocation_done) -etree_type *tree; -int def; -char *name; -lang_phase_type allocation_done; +DEFUN(exp_get_value_int,(tree,def,name, allocation_done), + etree_type *tree AND + int def AND + char *name AND + lang_phase_type allocation_done) { return (int)exp_get_vma(tree,(bfd_vma)def,name, allocation_done); } |