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author | Mystery Man <unknown@mandriva.org> | 2002-09-03 22:11:26 +0000 |
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committer | Mystery Man <unknown@mandriva.org> | 2002-09-03 22:11:26 +0000 |
commit | 27a26c82a667e1091f468e77f7a688341e3fccae (patch) | |
tree | c8c525b36c9c25cd49d2169f65abfc479cad54f5 /mdk-stage1/insmod-modutils/obj/obj_common.c | |
parent | ea2afedb2e1bb848dcc27a605a14e3e3ddebbf48 (diff) | |
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This commit was manufactured by cvs2svn to create tag 'V1_1_9_31mdk'.V1_1_9_31mdk
Diffstat (limited to 'mdk-stage1/insmod-modutils/obj/obj_common.c')
-rw-r--r-- | mdk-stage1/insmod-modutils/obj/obj_common.c | 399 |
1 files changed, 0 insertions, 399 deletions
diff --git a/mdk-stage1/insmod-modutils/obj/obj_common.c b/mdk-stage1/insmod-modutils/obj/obj_common.c deleted file mode 100644 index 2a6606c94..000000000 --- a/mdk-stage1/insmod-modutils/obj/obj_common.c +++ /dev/null @@ -1,399 +0,0 @@ -/* Elf file, section, and symbol manipulation routines. - Copyright 1996, 1997 Linux International. - - Contributed by Richard Henderson <rth@tamu.edu> - - This file is part of the Linux modutils. - - 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. */ - -#ident "$Id$" - -#include <stdlib.h> -#include <string.h> -#include <assert.h> - -#include <obj.h> -#include <util.h> -#include <module.h> - -/*======================================================================*/ - -/* Standard ELF hash function. */ -inline unsigned long -obj_elf_hash_n(const char *name, unsigned long n) -{ - unsigned long h = 0; - unsigned long g; - unsigned char ch; - - while (n > 0) - { - ch = *name++; - h = (h << 4) + ch; - if ((g = (h & 0xf0000000)) != 0) - { - h ^= g >> 24; - h &= ~g; - } - n--; - } - return h; -} - -unsigned long -obj_elf_hash (const char *name) -{ - return obj_elf_hash_n(name, strlen(name)); -} - -void -obj_set_symbol_compare (struct obj_file *f, - int (*cmp)(const char *, const char *), - unsigned long (*hash)(const char *)) -{ - if (cmp) - f->symbol_cmp = cmp; - if (hash) - { - struct obj_symbol *tmptab[HASH_BUCKETS], *sym, *next; - int i; - - f->symbol_hash = hash; - - memcpy(tmptab, f->symtab, sizeof(tmptab)); - memset(f->symtab, 0, sizeof(f->symtab)); - - for (i = 0; i < HASH_BUCKETS; ++i) - for (sym = tmptab[i]; sym ; sym = next) - { - unsigned long h = hash(sym->name) % HASH_BUCKETS; - next = sym->next; - sym->next = f->symtab[h]; - f->symtab[h] = sym; - } - } -} - -struct obj_symbol * -obj_add_symbol (struct obj_file *f, const char *name, unsigned long symidx, - int info, int secidx, ElfW(Addr) value, unsigned long size) -{ - struct obj_symbol *sym; - unsigned long hash = f->symbol_hash(name) % HASH_BUCKETS; - int n_type = ELFW(ST_TYPE)(info); - int n_binding = ELFW(ST_BIND)(info); - - for (sym = f->symtab[hash]; sym; sym = sym->next) - if (f->symbol_cmp(sym->name, name) == 0) - { - int o_secidx = sym->secidx; - int o_info = sym->info; - int o_type = ELFW(ST_TYPE)(o_info); - int o_binding = ELFW(ST_BIND)(o_info); - - /* A redefinition! Is it legal? */ - - if (secidx == SHN_UNDEF) - return sym; - else if (o_secidx == SHN_UNDEF) - goto found; - else if (n_binding == STB_GLOBAL && o_binding == STB_LOCAL) - { - /* Cope with local and global symbols of the same name - in the same object file, as might have been created - by ld -r. The only reason locals are now seen at this - level at all is so that we can do semi-sensible things - with parameters. */ - - struct obj_symbol *nsym, **p; - - nsym = arch_new_symbol(); - nsym->next = sym->next; - nsym->ksymidx = -1; - - /* Excise the old (local) symbol from the hash chain. */ - for (p = &f->symtab[hash]; *p != sym; p = &(*p)->next) - continue; - *p = sym = nsym; - goto found; - } - else if (n_binding == STB_LOCAL) - { - /* Another symbol of the same name has already been defined. - Just add this to the local table. */ - sym = arch_new_symbol(); - sym->next = NULL; - sym->ksymidx = -1; - f->local_symtab[symidx] = sym; - goto found; - } - else if (n_binding == STB_WEAK) - return sym; - else if (o_binding == STB_WEAK) - goto found; - /* Don't unify COMMON symbols with object types the programmer - doesn't expect. */ - else if (secidx == SHN_COMMON - && (o_type == STT_NOTYPE || o_type == STT_OBJECT)) - return sym; - else if (o_secidx == SHN_COMMON - && (n_type == STT_NOTYPE || n_type == STT_OBJECT)) - goto found; - else - { - /* Don't report an error if the symbol is coming from - the kernel or some external module. */ - if (secidx <= SHN_HIRESERVE) - error("%s multiply defined", name); - return sym; - } - } - - /* Completely new symbol. */ - sym = arch_new_symbol(); - sym->next = f->symtab[hash]; - f->symtab[hash] = sym; - sym->ksymidx = -1; - - if (ELFW(ST_BIND)(info) == STB_LOCAL && symidx != -1) { - if (symidx >= f->local_symtab_size) - error("local symbol %s with index %ld exceeds local_symtab_size %ld", - name, (long) symidx, (long) f->local_symtab_size); - else - f->local_symtab[symidx] = sym; - } - -found: - sym->name = name; - sym->value = value; - sym->size = size; - sym->secidx = secidx; - sym->info = info; - sym->r_type = 0; /* should be R_arch_NONE for all arch */ - - return sym; -} - -struct obj_symbol * -obj_find_symbol (struct obj_file *f, const char *name) -{ - struct obj_symbol *sym; - unsigned long hash = f->symbol_hash(name) % HASH_BUCKETS; - - for (sym = f->symtab[hash]; sym; sym = sym->next) - if (f->symbol_cmp(sym->name, name) == 0) - return sym; - - return NULL; -} - -ElfW(Addr) -obj_symbol_final_value (struct obj_file *f, struct obj_symbol *sym) -{ - if (sym) - { - if (sym->secidx >= SHN_LORESERVE) - return sym->value; - - return sym->value + f->sections[sym->secidx]->header.sh_addr; - } - else - { - /* As a special case, a NULL sym has value zero. */ - return 0; - } -} - -struct obj_section * -obj_find_section (struct obj_file *f, const char *name) -{ - int i, n = f->header.e_shnum; - - for (i = 0; i < n; ++i) - if (strcmp(f->sections[i]->name, name) == 0) - return f->sections[i]; - - return NULL; -} - -static int -obj_load_order_prio(struct obj_section *a) -{ - unsigned long af, ac; - - af = a->header.sh_flags; - - ac = 0; - if (a->name[0] != '.' || strlen(a->name) != 10 || - strcmp(a->name + 5, ".init")) ac |= 32; - if (af & SHF_ALLOC) ac |= 16; - if (!(af & SHF_WRITE)) ac |= 8; - if (af & SHF_EXECINSTR) ac |= 4; - if (a->header.sh_type != SHT_NOBITS) ac |= 2; -#if defined(ARCH_ia64) - if (af & SHF_IA_64_SHORT) ac -= 1; -#endif - - return ac; -} - -void -obj_insert_section_load_order (struct obj_file *f, struct obj_section *sec) -{ - struct obj_section **p; - int prio = obj_load_order_prio(sec); - for (p = f->load_order_search_start; *p ; p = &(*p)->load_next) - if (obj_load_order_prio(*p) < prio) - break; - sec->load_next = *p; - *p = sec; -} - -struct obj_section * -obj_create_alloced_section (struct obj_file *f, const char *name, - unsigned long align, unsigned long size) -{ - int newidx = f->header.e_shnum++; - struct obj_section *sec; - - f->sections = xrealloc(f->sections, (newidx+1) * sizeof(sec)); - f->sections[newidx] = sec = arch_new_section(); - - memset(sec, 0, sizeof(*sec)); - sec->header.sh_type = SHT_PROGBITS; - sec->header.sh_flags = SHF_WRITE|SHF_ALLOC; - sec->header.sh_size = size; - sec->header.sh_addralign = align; - sec->name = name; - sec->idx = newidx; - if (size) - sec->contents = xmalloc(size); - - obj_insert_section_load_order(f, sec); - - return sec; -} - -struct obj_section * -obj_create_alloced_section_first (struct obj_file *f, const char *name, - unsigned long align, unsigned long size) -{ - int newidx = f->header.e_shnum++; - struct obj_section *sec; - - f->sections = xrealloc(f->sections, (newidx+1) * sizeof(sec)); - f->sections[newidx] = sec = arch_new_section(); - - memset(sec, 0, sizeof(*sec)); - sec->header.sh_type = SHT_PROGBITS; - sec->header.sh_flags = SHF_WRITE|SHF_ALLOC; - sec->header.sh_size = size; - sec->header.sh_addralign = align; - sec->name = name; - sec->idx = newidx; - if (size) - sec->contents = xmalloc(size); - - sec->load_next = f->load_order; - f->load_order = sec; - if (f->load_order_search_start == &f->load_order) - f->load_order_search_start = &sec->load_next; - - return sec; -} - -void * -obj_extend_section (struct obj_section *sec, unsigned long more) -{ - unsigned long oldsize = sec->header.sh_size; - sec->contents = xrealloc(sec->contents, sec->header.sh_size += more); - return sec->contents + oldsize; -} - -/* Convert an object pointer (address) to a native pointer and vice versa. - * It gets interesting when the object has 64 bit pointers but modutils - * is running 32 bit. This is nasty code but it stops the compiler giving - * spurious warning messages. "I know what I am doing" ... - */ - -void * -obj_addr_to_native_ptr (ElfW(Addr) addr) -{ - unsigned int convert = (sizeof(void *) << 8) + sizeof(addr); /* to, from */ - union obj_ptr_4 p4; - union obj_ptr_8 p8; - switch (convert) { - case 0x0404: - p4.addr = addr; - return(p4.ptr); - break; - case 0x0408: - p4.addr = addr; - if (p4.addr != addr) { - error("obj_addr_to_native_ptr truncation %" tgt_long_fmt "x", - (tgt_long) addr); - exit(1); - } - return(p4.ptr); - break; - case 0x0804: - p8.addr = addr; - return(p8.ptr); - break; - case 0x0808: - p8.addr = addr; - return(p8.ptr); - break; - default: - error("obj_addr_to_native_ptr unknown conversion 0x%04x", convert); - exit(1); - } -} - -ElfW(Addr) -obj_native_ptr_to_addr (void *ptr) -{ - unsigned int convert = (sizeof(ElfW(Addr)) << 8) + sizeof(ptr); /* to, from */ - union obj_ptr_4 p4; - union obj_ptr_8 p8; - switch (convert) { - case 0x0404: - p4.ptr = ptr; - return(p4.addr); - break; - case 0x0408: - p8.ptr = ptr; - p4.addr = p8.addr; - if (p4.addr != p8.addr) { - error("obj_native_ptr_to_addr truncation %" tgt_long_fmt "x", - (tgt_long) p8.addr); - exit(1); - } - return(p4.addr); - break; - case 0x0804: - p4.ptr = ptr; - return(p4.addr); /* compiler expands to 8 */ - break; - case 0x0808: - p8.ptr = ptr; - return(p8.addr); - break; - default: - error("obj_native_ptr_to_addr unknown conversion 0x%04x", convert); - exit(1); - } -} |