-/* ELF support for BFD.
- Copyright (C) 1991 Free Software Foundation, Inc.
+/* ELF executable support for BFD.
+ Copyright (C) 1991, 1992 Free Software Foundation, Inc.
Written by Fred Fish @ Cygnus Support, from information published
in "UNIX System V Release 4, Programmers Guide: ANSI C and
- Programming Support Tools".
-
+ Programming Support Tools". Sufficient support for gdb.
+
+ Rewritten by Mark Eichin @ Cygnus Support, from information
+ published in "System V Application Binary Interface", chapters 4
+ and 5, as well as the various "Processor Supplement" documents
+ derived from it. Added support for assembler and other object file
+ utilities.
+
This file is part of BFD, the Binary File Descriptor library.
This program is free software; you can redistribute it and/or modify
#include "sysdep.h"
#include "libbfd.h"
#include "obstack.h"
-#include "elf-common.h"
-#include "elf-internal.h"
-#include "elf-external.h"
+#include "elf/common.h"
+#include "elf/internal.h"
+#include "elf/external.h"
#ifdef HAVE_PROCFS /* Some core file support requires host /proc files */
#include <sys/procfs.h>
} elf_symbol_type;
/* Some private data is stashed away for future use using the tdata pointer
- in the bfd structure. This information is different for ELF core files
- and other ELF files. */
+ in the bfd structure. */
-typedef struct
+struct elf_obj_tdata
{
- void *prstatus; /* The raw /proc prstatus structure */
- void *prpsinfo; /* The raw /proc prpsinfo structure */
-} elf_core_tdata;
-
-#define core_prpsinfo(bfd) (((elf_core_tdata *)((bfd)->tdata))->prpsinfo)
-#define core_prstatus(bfd) (((elf_core_tdata *)((bfd)->tdata))->prstatus)
+ Elf_Internal_Ehdr elf_header[1]; /* Actual data, but ref like ptr */
+ Elf_Internal_Shdr *elf_sect_ptr;
+ struct strtab *strtab_ptr;
+ int symtab_section;
+ void *prstatus; /* The raw /proc prstatus structure */
+ void *prpsinfo; /* The raw /proc prpsinfo structure */
+};
-typedef struct
-{
- file_ptr symtab_filepos; /* Offset to start of ELF symtab section */
- long symtab_filesz; /* Size of ELF symtab section */
- file_ptr strtab_filepos; /* Offset to start of ELF string tbl section */
- long strtab_filesz; /* Size of ELF string tbl section */
-} elf_obj_tdata;
-
-#define elf_tdata(bfd) ((elf_obj_tdata *) ((bfd) -> tdata))
-#define elf_symtab_filepos(bfd) (elf_tdata(bfd) -> symtab_filepos)
-#define elf_symtab_filesz(bfd) (elf_tdata(bfd) -> symtab_filesz)
-#define elf_strtab_filepos(bfd) (elf_tdata(bfd) -> strtab_filepos)
-#define elf_strtab_filesz(bfd) (elf_tdata(bfd) -> strtab_filesz)
+#define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
+#define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
+#define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
+#define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr)
+#define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
+#define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
+#define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
/* Translate an ELF symbol in external format into an ELF symbol in internal
format. */
dst -> st_shndx = bfd_h_get_16 (abfd, (bfd_byte *) src -> st_shndx);
}
-
-/* Translate an ELF header in external format into an ELF header in internal
+/* Translate an ELF symbol in internal format into an ELF symbol in external
format. */
+static void
+DEFUN(elf_swap_symbol_out,(abfd, src, dst),
+ bfd *abfd AND
+ Elf_Internal_Sym *src AND
+ Elf_External_Sym *dst)
+{
+ bfd_h_put_32 (abfd, src->st_name, dst->st_name);
+ bfd_h_put_32 (abfd, src->st_value, dst->st_value);
+ bfd_h_put_32 (abfd, src->st_size, dst->st_size);
+ bfd_h_put_8 (abfd, src->st_info, dst->st_info);
+ bfd_h_put_8 (abfd, src->st_other, dst->st_other);
+ bfd_h_put_16 (abfd, src->st_shndx, dst->st_shndx);
+}
+
+
+/* Translate an ELF file header in external format into an ELF file header in
+ internal format. */
+
static void
DEFUN(elf_swap_ehdr_in,(abfd, src, dst),
bfd *abfd AND
Elf_External_Ehdr *src AND
Elf_Internal_Ehdr *dst)
{
- bcopy (src -> e_ident, dst -> e_ident, EI_NIDENT);
+ memcpy (dst -> e_ident, src -> e_ident, EI_NIDENT);
dst -> e_type = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_type);
dst -> e_machine = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_machine);
dst -> e_version = bfd_h_get_32 (abfd, (bfd_byte *) src -> e_version);
dst -> e_shstrndx = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_shstrndx);
}
+/* Translate an ELF file header in internal format into an ELF file header in
+ external format. */
+
+static void
+DEFUN(elf_swap_ehdr_out,(abfd, src, dst),
+ bfd *abfd AND
+ Elf_Internal_Ehdr *src AND
+ Elf_External_Ehdr *dst)
+{
+ memcpy (dst -> e_ident, src -> e_ident, EI_NIDENT);
+ /* note that all elements of dst are *arrays of unsigned char* already... */
+ bfd_h_put_16 (abfd, src->e_type, dst->e_type);
+ bfd_h_put_16 (abfd, src->e_machine, dst->e_machine);
+ bfd_h_put_32 (abfd, src->e_version, dst->e_version);
+ bfd_h_put_32 (abfd, src->e_entry, dst->e_entry);
+ bfd_h_put_32 (abfd, src->e_phoff, dst->e_phoff);
+ bfd_h_put_32 (abfd, src->e_shoff, dst->e_shoff);
+ bfd_h_put_32 (abfd, src->e_flags, dst->e_flags);
+ bfd_h_put_16 (abfd, src->e_ehsize, dst->e_ehsize);
+ bfd_h_put_16 (abfd, src->e_phentsize, dst->e_phentsize);
+ bfd_h_put_16 (abfd, src->e_phnum, dst->e_phnum);
+ bfd_h_put_16 (abfd, src->e_shentsize, dst->e_shentsize);
+ bfd_h_put_16 (abfd, src->e_shnum, dst->e_shnum);
+ bfd_h_put_16 (abfd, src->e_shstrndx, dst->e_shstrndx);
+}
+
/* Translate an ELF section header table entry in external format into an
ELF section header table entry in internal format. */
Elf_External_Shdr *src AND
Elf_Internal_Shdr *dst)
{
- dst -> sh_name = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_name);
- dst -> sh_type = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_type);
- dst -> sh_flags = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_flags);
- dst -> sh_addr = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_addr);
- dst -> sh_offset = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_offset);
- dst -> sh_size = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_size);
- dst -> sh_link = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_link);
- dst -> sh_info = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_info);
- dst -> sh_addralign = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_addralign);
- dst -> sh_entsize = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_entsize);
+ dst->sh_name = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_name);
+ dst->sh_type = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_type);
+ dst->sh_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_flags);
+ dst->sh_addr = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_addr);
+ dst->sh_offset = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_offset);
+ dst->sh_size = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_size);
+ dst->sh_link = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_link);
+ dst->sh_info = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_info);
+ dst->sh_addralign = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_addralign);
+ dst->sh_entsize = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_entsize);
+ /* we haven't done any processing on it yet, so... */
+ dst->rawdata = (void*)0;
+}
+
+/* Translate an ELF section header table entry in internal format into an
+ ELF section header table entry in external format. */
+
+static void
+DEFUN(elf_swap_shdr_out,(abfd, src, dst),
+ bfd *abfd AND
+ Elf_Internal_Shdr *src AND
+ Elf_External_Shdr *dst)
+{
+ /* note that all elements of dst are *arrays of unsigned char* already... */
+ bfd_h_put_32 (abfd, src->sh_name, dst->sh_name);
+ bfd_h_put_32 (abfd, src->sh_type, dst->sh_type);
+ bfd_h_put_32 (abfd, src->sh_flags, dst->sh_flags);
+ bfd_h_put_32 (abfd, src->sh_addr, dst->sh_addr);
+ bfd_h_put_32 (abfd, src->sh_offset, dst->sh_offset);
+ bfd_h_put_32 (abfd, src->sh_size, dst->sh_size);
+ bfd_h_put_32 (abfd, src->sh_link, dst->sh_link);
+ bfd_h_put_32 (abfd, src->sh_info, dst->sh_info);
+ bfd_h_put_32 (abfd, src->sh_addralign, dst->sh_addralign);
+ bfd_h_put_32 (abfd, src->sh_entsize, dst->sh_entsize);
}
Elf_External_Phdr *src AND
Elf_Internal_Phdr *dst)
{
- dst -> p_type = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_type);
- dst -> p_offset = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_offset);
- dst -> p_vaddr = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_vaddr);
- dst -> p_paddr = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_paddr);
- dst -> p_filesz = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_filesz);
- dst -> p_memsz = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_memsz);
- dst -> p_flags = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_flags);
- dst -> p_align = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_align);
+ dst->p_type = bfd_h_get_32 (abfd, (bfd_byte *) src->p_type);
+ dst->p_offset = bfd_h_get_32 (abfd, (bfd_byte *) src->p_offset);
+ dst->p_vaddr = bfd_h_get_32 (abfd, (bfd_byte *) src->p_vaddr);
+ dst->p_paddr = bfd_h_get_32 (abfd, (bfd_byte *) src->p_paddr);
+ dst->p_filesz = bfd_h_get_32 (abfd, (bfd_byte *) src->p_filesz);
+ dst->p_memsz = bfd_h_get_32 (abfd, (bfd_byte *) src->p_memsz);
+ dst->p_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->p_flags);
+ dst->p_align = bfd_h_get_32 (abfd, (bfd_byte *) src->p_align);
+}
+
+
+/* Translate an ELF reloc from external format to internal format. */
+static void
+DEFUN(elf_swap_reloc_in,(abfd, src, dst),
+ bfd *abfd AND
+ Elf_External_Rel *src AND
+ Elf_Internal_Rel *dst)
+{
+ dst->r_offset = bfd_h_get_32 (abfd, (bfd_byte *) src->r_offset);
+ dst->r_info = bfd_h_get_32 (abfd, (bfd_byte *) src->r_info);
+}
+
+static void
+DEFUN(elf_swap_reloca_in,(abfd, src, dst),
+ bfd *abfd AND
+ Elf_External_Rela *src AND
+ Elf_Internal_Rela *dst)
+{
+ dst->r_offset = bfd_h_get_32 (abfd, (bfd_byte *) src->r_offset);
+ dst->r_info = bfd_h_get_32 (abfd, (bfd_byte *) src->r_info);
+ dst->r_addend = bfd_h_get_32 (abfd, (bfd_byte *) src->r_addend);
+}
+
+/* Translate an ELF reloc from internal format to external format. */
+static void
+DEFUN(elf_swap_reloc_out,(abfd, src, dst),
+ bfd *abfd AND
+ Elf_Internal_Rel *src AND
+ Elf_External_Rel *dst)
+{
+ bfd_h_put_32 (abfd, src->r_offset, dst->r_offset);
+ bfd_h_put_32 (abfd, src->r_info, dst->r_info);
+}
+
+static void
+DEFUN(elf_swap_reloca_out,(abfd, src, dst),
+ bfd *abfd AND
+ Elf_Internal_Rela *src AND
+ Elf_External_Rela *dst)
+{
+ bfd_h_put_32 (abfd, src->r_offset, dst->r_offset);
+ bfd_h_put_32 (abfd, src->r_info, dst->r_info);
+ bfd_h_put_32 (abfd, src->r_addend, dst->r_addend);
+}
+
+static char *EXFUN(elf_read, (bfd *, long, int));
+static struct sec * EXFUN(section_from_elf_index, (bfd *, int));
+static int EXFUN(elf_section_from_bfd_section, (bfd *, struct sec *));
+static boolean EXFUN(elf_slurp_symbol_table, (bfd *, asymbol **));
+static void EXFUN(elf_info_to_howto, (bfd *, arelent *, Elf_Internal_Rela *));
+static char *EXFUN(elf_get_str_section, (bfd *, unsigned int));
+
+/*
+INTERNAL_FUNCTION
+ bfd_elf_find_section
+
+SYNOPSIS
+ struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
+
+DESCRIPTION
+ Helper functions for GDB to locate the string tables.
+ Since BFD hides string tables from callers, GDB needs to use an
+ internal hook to find them. Sun's .stabstr, in particular,
+ isn't even pointed to by the .stab section, so ordinary
+ mechanisms wouldn't work to find it, even if we had some.
+*/
+
+struct elf_internal_shdr *
+DEFUN(bfd_elf_find_section, (abfd, name),
+ bfd *abfd AND
+ char *name)
+{
+ Elf_Internal_Shdr *i_shdrp = elf_elfsections (abfd);
+ char *shstrtab = elf_get_str_section (abfd, elf_elfheader (abfd)->e_shstrndx);
+ unsigned int max = elf_elfheader (abfd)->e_shnum;
+ unsigned int i;
+
+ for (i = 1; i < max; i++)
+ if (!strcmp (&shstrtab[i_shdrp[i].sh_name], name))
+ return &i_shdrp[i];
+ return 0;
+}
+
+/* End of GDB support. */
+
+static char *
+DEFUN(elf_get_str_section, (abfd, shindex),
+ bfd *abfd AND
+ unsigned int shindex)
+{
+ Elf_Internal_Shdr *i_shdrp = elf_elfsections (abfd);
+ unsigned int shstrtabsize = i_shdrp[shindex].sh_size;
+ unsigned int offset = i_shdrp[shindex].sh_offset;
+ char *shstrtab = i_shdrp[shindex].rawdata;
+
+ if (shstrtab)
+ return shstrtab;
+
+ if ((shstrtab = elf_read (abfd, offset, shstrtabsize)) == NULL)
+ {
+ return (NULL);
+ }
+ i_shdrp[shindex].rawdata = (void*)shstrtab;
+ return shstrtab;
+}
+
+static char *
+DEFUN(elf_string_from_elf_section, (abfd, shindex, strindex),
+ bfd *abfd AND
+ unsigned int shindex AND
+ unsigned int strindex)
+{
+ Elf_Internal_Shdr *i_shdrp = elf_elfsections (abfd);
+ Elf_Internal_Shdr *hdr = i_shdrp + shindex;
+
+ if (! hdr->rawdata)
+ {
+ if (elf_get_str_section (abfd, shindex) == NULL)
+ {
+ return NULL;
+ }
+ }
+ return ((char*)hdr->rawdata)+strindex;
}
+#define elf_string_from_elf_strtab(abfd, strindex) \
+ elf_string_from_elf_section (abfd, elf_elfheader(abfd)->e_shstrndx, strindex)
/* Create a new bfd section from an ELF section header. */
static boolean
-DEFUN(bfd_section_from_shdr, (abfd, hdr, shstrtab),
+DEFUN(bfd_section_from_shdr, (abfd, shindex),
bfd *abfd AND
- Elf_Internal_Shdr *hdr AND
- char *shstrtab)
+ unsigned int shindex)
{
+ Elf_Internal_Shdr *i_shdrp = elf_elfsections (abfd);
+ Elf_Internal_Shdr *hdr = i_shdrp + shindex;
asection *newsect;
char *name;
- name = hdr -> sh_name ? shstrtab + hdr -> sh_name : "unnamed";
- newsect = bfd_make_section (abfd, name);
- newsect -> vma = hdr -> sh_addr;
- newsect -> size = hdr -> sh_size;
- if (!(hdr -> sh_type == SHT_NOBITS))
- {
- newsect -> filepos = hdr -> sh_offset;
- newsect -> flags |= SEC_HAS_CONTENTS;
- }
- if (hdr -> sh_flags & SHF_ALLOC)
+ name = hdr->sh_name ?
+ elf_string_from_elf_strtab (abfd, hdr->sh_name) : "unnamed";
+
+ switch(hdr->sh_type) {
+
+ case SHT_NULL:
+ /* inactive section. Throw it away. */
+ return true;
+
+ case SHT_PROGBITS:
+ case SHT_NOBITS:
+ /* Bits that get saved. This one is real. */
+ if (! hdr->rawdata )
+ {
+ newsect = bfd_make_section (abfd, name);
+ newsect->vma = hdr->sh_addr;
+ newsect->_raw_size = hdr->sh_size;
+ newsect->filepos = hdr->sh_offset; /* so we can read back the bits */
+ newsect->flags |= SEC_HAS_CONTENTS;
+
+ if (hdr->sh_flags & SHF_ALLOC)
+ {
+ newsect->flags |= SEC_ALLOC;
+ if (hdr->sh_type != SHT_NOBITS)
+ newsect->flags |= SEC_LOAD;
+ }
+
+ if (!(hdr->sh_flags & SHF_WRITE))
+ newsect->flags |= SEC_READONLY;
+
+ if (hdr->sh_flags & SHF_EXECINSTR)
+ newsect->flags |= SEC_CODE; /* FIXME: may only contain SOME code */
+ else
+ newsect->flags |= SEC_DATA;
+
+ hdr->rawdata = (void*)newsect;
+ }
+ return true;
+ break;
+
+ case SHT_SYMTAB: /* A symbol table */
+ BFD_ASSERT (hdr->sh_entsize == sizeof (Elf_External_Sym));
+ elf_onesymtab (abfd) = shindex;
+ abfd->flags |= HAS_SYMS;
+ return true;
+
+ case SHT_STRTAB: /* A string table */
+ return true;
+
+ case SHT_REL:
+ case SHT_RELA:
+ /* *these* do a lot of work -- but build no sections! */
+ /* the spec says there can be multiple strtabs, but only one symtab */
+ /* but there can be lots of REL* sections. */
+ /* FIXME: The above statement is wrong! There are typically at least
+ two symbol tables in a dynamically linked executable, ".dynsym"
+ which is the dynamic linkage symbol table and ".symtab", which is
+ the "traditional" symbol table. -fnf */
+
{
- newsect -> flags |= SEC_ALLOC;
- if (hdr -> sh_type != SHT_NOBITS)
- {
- newsect -> flags |= SEC_LOAD;
- }
+ asection *target_sect;
+ unsigned int idx;
+
+ bfd_section_from_shdr (abfd, hdr->sh_link); /* symbol table */
+ bfd_section_from_shdr (abfd, hdr->sh_info); /* target */
+ target_sect = section_from_elf_index (abfd, hdr->sh_info);
+ if (target_sect == NULL)
+ return false;
+
+#if 0
+ /* FIXME: We are only prepared to read one symbol table, so
+ do NOT read the dynamic symbol table since it is only a
+ subset of the full symbol table. Also see comment above. -fnf */
+ if (!elf_slurp_symbol_table(abfd, i_shdrp + hdr->sh_link))
+ return false;
+#endif
+
+ target_sect->reloc_count = hdr->sh_size / hdr->sh_entsize;
+ target_sect->flags |= SEC_RELOC;
+ target_sect->relocation = 0;
+ target_sect->rel_filepos = hdr->sh_offset;
+ return true;
}
- if (!(hdr -> sh_flags & SHF_WRITE))
+ break;
+
+ case SHT_HASH:
+ case SHT_DYNAMIC:
+ case SHT_DYNSYM: /* could treat this like symtab... */
+#if 0
+ fprintf(stderr, "Dynamic Linking sections not yet supported.\n");
+ abort ();
+#endif
+ break;
+
+ case SHT_NOTE:
+#if 0
+ fprintf(stderr, "Note Sections not yet supported.\n");
+ abort ();
+#endif
+ break;
+
+ case SHT_SHLIB:
+#if 0
+ fprintf(stderr, "SHLIB Sections not supported (and non conforming.)\n");
+#endif
+ return true;
+
+ default:
+ break;
+ }
+
+ return (true);
+}
+
+
+
+
+struct strtab {
+ char *tab;
+ int nentries;
+ int length;
+};
+
+
+static struct strtab *
+DEFUN(bfd_new_strtab, (abfd),
+ bfd *abfd)
+{
+ struct strtab *ss;
+
+ ss = (struct strtab *)malloc(sizeof(struct strtab));
+ ss->tab = malloc(1);
+ BFD_ASSERT(ss->tab != 0);
+ *ss->tab = 0;
+ ss->nentries = 0;
+ ss->length = 1;
+
+ return ss;
+}
+
+static int
+DEFUN(bfd_add_to_strtab, (abfd, ss, str),
+ bfd *abfd AND
+ struct strtab *ss AND
+ CONST char *str)
+{
+ /* should search first, but for now: */
+ /* include the trailing NUL */
+ int ln = strlen(str)+1;
+
+ /* should this be using obstacks? */
+ ss->tab = realloc(ss->tab, ss->length + ln);
+
+ BFD_ASSERT(ss->tab != 0);
+ strcpy(ss->tab + ss->length, str);
+ ss->nentries++;
+ ss->length += ln;
+
+ return ss->length - ln;
+}
+
+static int
+DEFUN(bfd_add_2_to_strtab, (abfd, ss, str, str2),
+ bfd *abfd AND
+ struct strtab *ss AND
+ char *str AND
+ CONST char *str2)
+{
+ /* should search first, but for now: */
+ /* include the trailing NUL */
+ int ln = strlen(str)+strlen(str2)+1;
+
+ /* should this be using obstacks? */
+ if (ss->length)
+ ss->tab = realloc(ss->tab, ss->length + ln);
+ else
+ ss->tab = malloc(ln);
+
+ BFD_ASSERT(ss->tab != 0);
+ strcpy(ss->tab + ss->length, str);
+ strcpy(ss->tab + ss->length + strlen(str), str2);
+ ss->nentries++;
+ ss->length += ln;
+
+ return ss->length - ln;
+}
+
+/* Create a new ELF section from a bfd section. */
+
+static boolean
+DEFUN(bfd_shdr_from_section, (abfd, hdr, shstrtab, indx),
+ bfd *abfd AND
+ Elf_Internal_Shdr *hdr AND
+ struct strtab *shstrtab AND
+ int indx)
+{
+ asection *sect;
+ int ndx;
+
+ /* figure out out to write the section name from the bfd section name. MWE */
+
+ sect = abfd->sections;
+ for (ndx = indx; --ndx; )
{
- newsect -> flags |= SEC_READONLY;
+ sect = sect->next;
}
- if (hdr -> sh_flags & SHF_EXECINSTR)
+ hdr[indx].sh_name = bfd_add_to_strtab(abfd, shstrtab,
+ bfd_section_name(abfd, sect));
+ hdr[indx].sh_addr = sect->vma;
+ hdr[indx].sh_size = sect->_raw_size;
+ hdr[indx].sh_flags = 0;
+ /* these need to be preserved on */
+ hdr[indx].sh_link = 0;
+ hdr[indx].sh_info = 0;
+ hdr[indx].sh_addralign = 0;
+ hdr[indx].sh_entsize = 0;
+
+ hdr[indx].sh_type = 0;
+ if (sect->flags & SEC_RELOC) {
+ hdr[indx].sh_type = SHT_RELA; /* FIXME -- sparc specific */
+ }
+
+ if (sect->flags & SEC_HAS_CONTENTS)
{
- newsect -> flags |= SEC_CODE; /* FIXME: may only contain SOME code */
+ hdr[indx].sh_offset = sect->filepos;
+ hdr[indx].sh_size = sect->_raw_size;
}
- if (hdr -> sh_type == SHT_SYMTAB)
+ if (sect->flags & SEC_ALLOC)
{
- abfd -> flags |= HAS_SYMS;
+ hdr[indx].sh_flags |= SHF_ALLOC;
+ if (sect->flags & SEC_LOAD)
+ {
+ /* do something with sh_type ? */
+ }
}
+ if (!(sect->flags & SEC_READONLY))
+ hdr[indx].sh_flags |= SHF_WRITE;
+
+ if (sect->flags & SEC_CODE)
+ hdr[indx].sh_flags |= SHF_EXECINSTR;
return (true);
}
(hdr -> p_memsz > hdr -> p_filesz));
sprintf (namebuf, split ? "segment%da" : "segment%d", index);
name = bfd_alloc (abfd, strlen (namebuf) + 1);
- (void) strcpy (name, namebuf);
+ strcpy (name, namebuf);
newsect = bfd_make_section (abfd, name);
newsect -> vma = hdr -> p_vaddr;
- newsect -> size = hdr -> p_filesz;
+ newsect -> _raw_size = hdr -> p_filesz;
newsect -> filepos = hdr -> p_offset;
newsect -> flags |= SEC_HAS_CONTENTS;
if (hdr -> p_type == PT_LOAD)
{
sprintf (namebuf, "segment%db", index);
name = bfd_alloc (abfd, strlen (namebuf) + 1);
- (void) strcpy (name, namebuf);
+ strcpy (name, namebuf);
newsect = bfd_make_section (abfd, name);
newsect -> vma = hdr -> p_vaddr + hdr -> p_filesz;
- newsect -> size = hdr -> p_memsz - hdr -> p_filesz;
+ newsect -> _raw_size = hdr -> p_memsz - hdr -> p_filesz;
if (hdr -> p_type == PT_LOAD)
{
newsect -> flags |= SEC_ALLOC;
if (hdr -> p_flags & PF_X)
- {
- newsect -> flags |= SEC_CODE;
- }
+ newsect -> flags |= SEC_CODE;
}
if (!(hdr -> p_flags & PF_W))
- {
- newsect -> flags |= SEC_READONLY;
- }
+ newsect -> flags |= SEC_READONLY;
}
return (true);
long filepos)
{
asection *newsect;
+ prstatus_t *status = (prstatus_t *)0;
if (descsz == sizeof (prstatus_t))
{
newsect = bfd_make_section (abfd, ".reg");
- newsect -> size = sizeof (gregset_t);
- newsect -> filepos = filepos + (long) (((prstatus_t *)0) -> pr_reg);
+ newsect -> _raw_size = sizeof (status->pr_reg);
+ newsect -> filepos = filepos + (long) &status->pr_reg;
newsect -> flags = SEC_ALLOC | SEC_HAS_CONTENTS;
newsect -> alignment_power = 2;
if ((core_prstatus (abfd) = bfd_alloc (abfd, descsz)) != NULL)
{
- bcopy (descdata, core_prstatus (abfd), descsz);
+ memcpy (core_prstatus (abfd), descdata, descsz);
}
}
}
{
asection *newsect;
- if (descsz == sizeof (fpregset_t))
- {
- newsect = bfd_make_section (abfd, ".reg2");
- newsect -> size = sizeof (fpregset_t);
- newsect -> filepos = filepos;
- newsect -> flags = SEC_ALLOC | SEC_HAS_CONTENTS;
- newsect -> alignment_power = 2;
- }
+ newsect = bfd_make_section (abfd, ".reg2");
+ newsect -> _raw_size = descsz;
+ newsect -> filepos = filepos;
+ newsect -> flags = SEC_ALLOC | SEC_HAS_CONTENTS;
+ newsect -> alignment_power = 2;
}
#endif /* HAVE_PROCFS */
DEFUN(elf_core_file_failing_command, (abfd),
bfd *abfd)
{
-#if HAVE_PROCFS
+#ifdef HAVE_PROCFS
if (core_prpsinfo (abfd))
{
prpsinfo_t *p = core_prpsinfo (abfd);
DEFUN(elf_core_file_failing_signal, (abfd),
bfd *abfd)
{
-#if HAVE_PROCFS
+#ifdef HAVE_PROCFS
if (core_prstatus (abfd))
{
return (((prstatus_t *)(core_prstatus (abfd))) -> pr_cursig);
bfd *core_bfd AND
bfd *exec_bfd)
{
+#ifdef HAVE_PROCFS
char *corename;
char *execname;
+#endif
/* First, xvecs must match since both are ELF files for the same target. */
return (false);
}
-#if HAVE_PROCFS
+#ifdef HAVE_PROCFS
/* If no prpsinfo, just return true. Otherwise, grab the last component
of the exec'd pathname from the prpsinfo. */
asection *newsect;
if (hdr -> p_filesz > 0
- && (buf = malloc (hdr -> p_filesz)) != NULL
+ && (buf = (char *) bfd_xmalloc (hdr -> p_filesz)) != NULL
&& bfd_seek (abfd, hdr -> p_offset, SEEK_SET) != -1L
&& bfd_read ((PTR) buf, hdr -> p_filesz, 1, abfd) == hdr -> p_filesz)
{
if (sectname != NULL)
{
newsect = bfd_make_section (abfd, sectname);
- newsect -> size = i_note.descsz;
+ newsect -> _raw_size = i_note.descsz;
newsect -> filepos = filepos;
newsect -> flags = SEC_ALLOC | SEC_HAS_CONTENTS;
newsect -> alignment_power = 2;
{
free (buf);
}
+ return true;
+
}
+/* Read a specified number of bytes at a specified offset in an ELF
+ file, into a newly allocated buffer, and return a pointer to the
+ buffer. */
+
+static char *
+DEFUN(elf_read, (abfd, offset, size),
+ bfd *abfd AND
+ long offset AND
+ int size)
+{
+ char *buf;
+
+ if ((buf = bfd_alloc (abfd, size)) == NULL)
+ {
+ bfd_error = no_memory;
+ return (NULL);
+ }
+ if (bfd_seek (abfd, offset, SEEK_SET) == -1)
+ {
+ bfd_error = system_call_error;
+ return (NULL);
+ }
+ if (bfd_read ((PTR) buf, size, 1, abfd) != size)
+ {
+ bfd_error = system_call_error;
+ return (NULL);
+ }
+ return (buf);
+}
+
/* Begin processing a given object.
First we validate the file by reading in the ELF header and checking
DEFUN (elf_object_p, (abfd), bfd *abfd)
{
Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
- Elf_Internal_Ehdr i_ehdr; /* Elf file header, internal form */
- Elf_External_Shdr *x_shdr; /* Section header table, external form */
- Elf_Internal_Shdr *i_shdr; /* Section header table, internal form */
+ Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
+ Elf_External_Shdr x_shdr; /* Section header table entry, external form */
+ Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */
int shindex;
char *shstrtab; /* Internal copy of section header stringtab */
- int shstrtabsize; /* Size of section header string table */
+ Elf_Off offset; /* Temp place to stash file offsets */
/* Read in the ELF header in external format. */
/* FIXME, Check EI_VERSION here ! */
- switch (x_ehdr.e_ident[EI_CLASS]) {
- case ELFCLASSNONE: /* address size not specified */
- goto wrong; /* No support if can't tell address size */
- case ELFCLASS32: /* 32-bit addresses */
- break;
- case ELFCLASS64: /* 64-bit addresses */
- goto wrong; /* FIXME: 64 bits not yet supported */
- default:
- goto wrong; /* No support if unknown address class */
- }
+ switch (x_ehdr.e_ident[EI_CLASS])
+ {
+ case ELFCLASSNONE: /* address size not specified */
+ goto wrong; /* No support if can't tell address size */
+ case ELFCLASS32: /* 32-bit addresses */
+ break;
+ case ELFCLASS64: /* 64-bit addresses */
+ goto wrong; /* FIXME: 64 bits not yet supported */
+ default:
+ goto wrong; /* No support if unknown address class */
+ }
/* Switch xvec to match the specified byte order. */
- switch (x_ehdr.e_ident[EI_DATA]) {
- case ELFDATA2MSB: /* Big-endian */
- abfd->xvec = &elf_big_vec;
- break;
- case ELFDATA2LSB: /* Little-endian */
- abfd->xvec = &elf_little_vec;
- break;
- case ELFDATANONE: /* No data encoding specified */
- default: /* Unknown data encoding specified */
- goto wrong;
- }
+ switch (x_ehdr.e_ident[EI_DATA])
+ {
+ case ELFDATA2MSB: /* Big-endian */
+ if (!abfd->xvec->header_byteorder_big_p)
+ goto wrong;
+ break;
+ case ELFDATA2LSB: /* Little-endian */
+ if (abfd->xvec->header_byteorder_big_p)
+ goto wrong;
+ break;
+ case ELFDATANONE: /* No data encoding specified */
+ default: /* Unknown data encoding specified */
+ goto wrong;
+ }
/* Allocate an instance of the elf_obj_tdata structure and hook it up to
the tdata pointer in the bfd. */
- if ((abfd -> tdata = bfd_zalloc (abfd, sizeof (elf_obj_tdata))) == NULL)
+ if (NULL == (elf_tdata (abfd) = (struct elf_obj_tdata *)
+ bfd_zalloc (abfd, sizeof (struct elf_obj_tdata))))
{
bfd_error = no_memory;
return (NULL);
}
- /* Now that we know the byte order, swap in the rest of the header */
- elf_swap_ehdr_in (abfd, &x_ehdr, &i_ehdr);
+ /* FIXME: Any `wrong' exits below here will leak memory (tdata). */
+ /* Now that we know the byte order, swap in the rest of the header */
+ i_ehdrp = elf_elfheader (abfd);
+ elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp);
+
/* If there is no section header table, we're hosed. */
- if (i_ehdr.e_shoff == 0)
+ if (i_ehdrp->e_shoff == 0)
goto wrong;
- if (i_ehdr.e_type == ET_EXEC || i_ehdr.e_type == ET_DYN)
+ if (i_ehdrp->e_type == ET_EXEC || i_ehdrp->e_type == ET_DYN)
+ abfd -> flags |= EXEC_P;
+
+ switch (i_ehdrp->e_machine)
{
- abfd -> flags |= EXEC_P;
+ case EM_NONE:
+ case EM_M32: /* or should this be bfd_arch_obscure? */
+ bfd_default_set_arch_mach(abfd, bfd_arch_unknown, 0);
+ break;
+ case EM_SPARC:
+ bfd_default_set_arch_mach(abfd, bfd_arch_sparc, 0);
+ break;
+ case EM_386:
+ bfd_default_set_arch_mach(abfd, bfd_arch_i386, 0);
+ break;
+ case EM_68K:
+ bfd_default_set_arch_mach(abfd, bfd_arch_m68k, 0);
+ break;
+ case EM_88K:
+ bfd_default_set_arch_mach(abfd, bfd_arch_m88k, 0);
+ break;
+ case EM_860:
+ bfd_default_set_arch_mach(abfd, bfd_arch_i860, 0);
+ break;
+ case EM_MIPS:
+ bfd_default_set_arch_mach(abfd, bfd_arch_mips, 0);
+ break;
+ default:
+ goto wrong;
}
-
- /* Allocate space for copies of the section header table in external
- and internal form, seek to the section header table in the file,
+
+ /* Allocate space for a copy of the section header table in
+ internal form, seek to the section header table in the file,
read it in, and convert it to internal form. As a simple sanity
check, verify that the what BFD thinks is the size of each section
header table entry actually matches the size recorded in the file. */
- if (i_ehdr.e_shentsize != sizeof (*x_shdr))
+ if (i_ehdrp->e_shentsize != sizeof (x_shdr))
goto wrong;
- if ((x_shdr = (Elf_External_Shdr *)
- bfd_alloc (abfd, sizeof (*x_shdr) * i_ehdr.e_shnum)) == NULL)
+ i_shdrp = (Elf_Internal_Shdr *)
+ bfd_alloc (abfd, sizeof (*i_shdrp) * i_ehdrp->e_shnum);
+ if (! i_shdrp)
{
bfd_error = no_memory;
return (NULL);
}
- if ((i_shdr = (Elf_Internal_Shdr *)
- bfd_alloc (abfd, sizeof (*i_shdr) * i_ehdr.e_shnum)) == NULL)
- {
- bfd_error = no_memory;
- return (NULL);
- }
- if (bfd_seek (abfd, i_ehdr.e_shoff, SEEK_SET) == -1)
+ if (bfd_seek (abfd, i_ehdrp->e_shoff, SEEK_SET) == -1)
{
bfd_error = system_call_error;
return (NULL);
}
- for (shindex = 0; shindex < i_ehdr.e_shnum; shindex++)
+ for (shindex = 0; shindex < i_ehdrp->e_shnum; shindex++)
{
- if (bfd_read ((PTR) (x_shdr + shindex), sizeof (*x_shdr), 1, abfd)
- != sizeof (*x_shdr))
+ if (bfd_read ((PTR) &x_shdr, sizeof x_shdr, 1, abfd)
+ != sizeof (x_shdr))
{
bfd_error = system_call_error;
return (NULL);
}
- elf_swap_shdr_in (abfd, x_shdr + shindex, i_shdr + shindex);
+ elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex);
}
+ elf_elfsections (abfd) = i_shdrp;
+
/* Read in the string table containing the names of the sections. We
will need the base pointer to this table later. */
+ /* We read this inline now, so that we don't have to go through
+ bfd_section_from_shdr with it (since this particular strtab is
+ used to find all of the ELF section names.) */
- shstrtabsize = i_shdr[i_ehdr.e_shstrndx].sh_size;
- if ((shstrtab = bfd_alloc (abfd, shstrtabsize)) == NULL)
- {
- bfd_error = no_memory;
- return (NULL);
- }
- if (bfd_seek (abfd, i_shdr[i_ehdr.e_shstrndx].sh_offset, SEEK_SET) == -1)
- {
- bfd_error = system_call_error;
- return (NULL);
- }
- if (bfd_read ((PTR) shstrtab, shstrtabsize, 1, abfd) != shstrtabsize)
- {
- bfd_error = system_call_error;
- return (NULL);
- }
+ shstrtab = elf_get_str_section (abfd, i_ehdrp->e_shstrndx);
+ if (! shstrtab)
+ return (NULL);
/* Once all of the section headers have been read and converted, we
can start processing them. Note that the first section header is
offset and section size for both the symbol table section and the
associated string table section. */
- for (shindex = 1; shindex < i_ehdr.e_shnum; shindex++)
+ for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++)
{
- Elf_Internal_Shdr *hdr = i_shdr + shindex;
- bfd_section_from_shdr (abfd, hdr, shstrtab);
- if (hdr -> sh_type == SHT_SYMTAB)
- {
- elf_symtab_filepos(abfd) = hdr -> sh_offset;
- elf_symtab_filesz(abfd) = hdr -> sh_size;
- elf_strtab_filepos(abfd) = (i_shdr + hdr -> sh_link) -> sh_offset;
- elf_strtab_filesz(abfd) = (i_shdr + hdr -> sh_link) -> sh_size;
- }
+ bfd_section_from_shdr (abfd, shindex);
}
+ /* Remember the entry point specified in the ELF file header. */
+
+ bfd_get_start_address (abfd) = i_ehdrp->e_entry;
+
return (abfd->xvec);
}
DEFUN (elf_core_file_p, (abfd), bfd *abfd)
{
Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
- Elf_Internal_Ehdr i_ehdr; /* Elf file header, internal form */
- Elf_External_Phdr *x_phdr; /* Program header table, external form */
- Elf_Internal_Phdr *i_phdr; /* Program header table, internal form */
- int phindex;
+ Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
+ Elf_External_Phdr x_phdr; /* Program header table entry, external form */
+ Elf_Internal_Phdr *i_phdrp; /* Program header table, internal form */
+ unsigned int phindex;
/* Read in the ELF header in external format. */
/* FIXME, Check EI_VERSION here ! */
- switch (x_ehdr.e_ident[EI_CLASS]) {
- case ELFCLASSNONE: /* address size not specified */
- goto wrong; /* No support if can't tell address size */
- case ELFCLASS32: /* 32-bit addresses */
- break;
- case ELFCLASS64: /* 64-bit addresses */
- goto wrong; /* FIXME: 64 bits not yet supported */
- default:
- goto wrong; /* No support if unknown address class */
- }
+ switch (x_ehdr.e_ident[EI_CLASS])
+ {
+ case ELFCLASSNONE: /* address size not specified */
+ goto wrong; /* No support if can't tell address size */
+ case ELFCLASS32: /* 32-bit addresses */
+ break;
+ case ELFCLASS64: /* 64-bit addresses */
+ goto wrong; /* FIXME: 64 bits not yet supported */
+ default:
+ goto wrong; /* No support if unknown address class */
+ }
/* Switch xvec to match the specified byte order. */
- switch (x_ehdr.e_ident[EI_DATA]) {
- case ELFDATA2MSB: /* Big-endian */
- abfd->xvec = &elf_big_vec;
- break;
- case ELFDATA2LSB: /* Little-endian */
- abfd->xvec = &elf_little_vec;
- break;
- case ELFDATANONE: /* No data encoding specified */
- default: /* Unknown data encoding specified */
- goto wrong;
- }
+ switch (x_ehdr.e_ident[EI_DATA])
+ {
+ case ELFDATA2MSB: /* Big-endian */
+ abfd->xvec = &elf_big_vec;
+ break;
+ case ELFDATA2LSB: /* Little-endian */
+ abfd->xvec = &elf_little_vec;
+ break;
+ case ELFDATANONE: /* No data encoding specified */
+ default: /* Unknown data encoding specified */
+ goto wrong;
+ }
- /* Now that we know the byte order, swap in the rest of the header */
- elf_swap_ehdr_in (abfd, &x_ehdr, &i_ehdr);
-
- /* If there is no program header, or the type is not a core file, then
- we are hosed. */
- if (i_ehdr.e_phoff == 0 || i_ehdr.e_type != ET_CORE)
- goto wrong;
-
- /* Allocate an instance of the elf_core_tdata structure and hook it up to
+ /* Allocate an instance of the elf_obj_tdata structure and hook it up to
the tdata pointer in the bfd. */
- if ((abfd -> tdata = bfd_zalloc (abfd, sizeof (elf_core_tdata))) == NULL)
+ elf_tdata (abfd) =
+ (struct elf_obj_tdata *) bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
+ if (elf_tdata (abfd) == NULL)
{
bfd_error = no_memory;
return (NULL);
}
- /* Allocate space for copies of the program header table in external
- and internal form, seek to the program header table in the file,
+ /* FIXME, `wrong' returns from this point onward, leak memory. */
+
+ /* Now that we know the byte order, swap in the rest of the header */
+ i_ehdrp = elf_elfheader (abfd);
+ elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp);
+
+ /* If there is no program header, or the type is not a core file, then
+ we are hosed. */
+ if (i_ehdrp->e_phoff == 0 || i_ehdrp->e_type != ET_CORE)
+ goto wrong;
+
+ /* Allocate space for a copy of the program header table in
+ internal form, seek to the program header table in the file,
read it in, and convert it to internal form. As a simple sanity
check, verify that the what BFD thinks is the size of each program
header table entry actually matches the size recorded in the file. */
- if (i_ehdr.e_phentsize != sizeof (*x_phdr))
+ if (i_ehdrp->e_phentsize != sizeof (x_phdr))
goto wrong;
- if ((x_phdr = (Elf_External_Phdr *)
- bfd_alloc (abfd, sizeof (*x_phdr) * i_ehdr.e_phnum)) == NULL)
+ i_phdrp = (Elf_Internal_Phdr *)
+ bfd_alloc (abfd, sizeof (*i_phdrp) * i_ehdrp->e_phnum);
+ if (! i_phdrp)
{
bfd_error = no_memory;
return (NULL);
}
- if ((i_phdr = (Elf_Internal_Phdr *)
- bfd_alloc (abfd, sizeof (*i_phdr) * i_ehdr.e_phnum)) == NULL)
- {
- bfd_error = no_memory;
- return (NULL);
- }
- if (bfd_seek (abfd, i_ehdr.e_phoff, SEEK_SET) == -1)
+ if (bfd_seek (abfd, i_ehdrp->e_phoff, SEEK_SET) == -1)
{
bfd_error = system_call_error;
return (NULL);
}
- for (phindex = 0; phindex < i_ehdr.e_phnum; phindex++)
+ for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++)
{
- if (bfd_read ((PTR) (x_phdr + phindex), sizeof (*x_phdr), 1, abfd)
- != sizeof (*x_phdr))
+ if (bfd_read ((PTR) &x_phdr, sizeof (x_phdr), 1, abfd)
+ != sizeof (x_phdr))
{
bfd_error = system_call_error;
return (NULL);
}
- elf_swap_phdr_in (abfd, x_phdr + phindex, i_phdr + phindex);
+ elf_swap_phdr_in (abfd, &x_phdr, i_phdrp + phindex);
}
/* Once all of the program headers have been read and converted, we
can start processing them. */
- for (phindex = 0; phindex < i_ehdr.e_phnum; phindex++)
+ for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++)
{
- bfd_section_from_phdr (abfd, i_phdr + phindex, phindex);
- if ((i_phdr + phindex) -> p_type == PT_NOTE)
+ bfd_section_from_phdr (abfd, i_phdrp + phindex, phindex);
+ if ((i_phdrp + phindex) -> p_type == PT_NOTE)
{
- elf_corefile_note (abfd, i_phdr + phindex);
+ elf_corefile_note (abfd, i_phdrp + phindex);
}
}
+ /* Remember the entry point specified in the ELF file header. */
+
+ bfd_get_start_address (abfd) = i_ehdrp->e_entry;
+
return (abfd->xvec);
}
static boolean
DEFUN (elf_mkobject, (abfd), bfd *abfd)
{
- fprintf (stderr, "elf_mkobject unimplemented\n");
- fflush (stderr);
- abort ();
- return (false);
+ /* this just does initialization */
+ /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
+ elf_tdata(abfd) = (struct elf_obj_tdata *)
+ bfd_zalloc (abfd, sizeof(struct elf_obj_tdata));
+ if (elf_tdata(abfd) == 0) {
+ bfd_error = no_memory;
+ return false;
+ }
+ /* since everything is done at close time, do we need any
+ initialization? */
+
+ return (true);
+}
+
+/*
+ Create ELF output from BFD sections.
+
+ Essentially, just create the section header and forget about the program
+ header for now.
+
+*/
+
+/* lacking nested functions and nested types, set up for mapping over
+ BFD sections to produce ELF sections */
+
+typedef struct {
+ Elf_Internal_Ehdr *i_ehdr;
+ Elf_Internal_Shdr *i_shdrp;
+ struct strtab *shstrtab;
+ int symtab_section;
+} elf_sect_thunk;
+
+
+
+static void
+DEFUN (elf_make_sections, (abfd, asect, obj),
+ bfd *abfd AND
+ asection *asect AND
+ PTR obj)
+{
+ elf_sect_thunk *thunk = (elf_sect_thunk*)obj;
+ /* most of what is in bfd_shdr_from_section goes in here... */
+ /* and all of these sections generate at *least* one ELF section. */
+ int this_section;
+ int idx;
+
+ /* check if we're making a PROGBITS section... */
+ /* if ((asect->flags & SEC_ALLOC) && (asect->flags & SEC_LOAD)) */
+ /* this was too strict... what *do* we want to check here? */
+ if(1)
+ {
+ Elf_Internal_Shdr *this_hdr;
+ this_section = elf_section_from_bfd_section (abfd, asect);
+ this_hdr = &thunk->i_shdrp[this_section];
+
+ this_hdr->sh_addr = asect->vma;
+ this_hdr->sh_size = asect->_raw_size;
+ /* contents already set by elf_set_section_contents */
+
+ if (asect->flags & SEC_RELOC)
+ {
+ /* emit a reloc section, and thus strtab and symtab... */
+ Elf_Internal_Shdr *rela_hdr;
+ Elf_Internal_Shdr *symtab_hdr;
+ Elf_Internal_Shdr *symstrtab_hdr;
+ Elf_External_Rela *outbound_relocs;
+ Elf_External_Sym *outbound_syms;
+ int rela_section;
+ int symstrtab_section;
+
+ symtab_hdr = &thunk->i_shdrp[thunk->symtab_section];
+
+ if (thunk->symtab_section == this_section + 1)
+ rela_section = thunk->symtab_section + 2; /* symtab + symstrtab */
+ else
+ rela_section = this_section + 1;
+ rela_hdr = &thunk->i_shdrp[rela_section];
+ rela_hdr->sh_type = SHT_RELA;
+ rela_hdr->sh_link = thunk->symtab_section;
+ rela_hdr->sh_info = this_section;
+ rela_hdr->sh_entsize = sizeof (Elf_External_Rela);
+ /* orelocation has the data, reloc_count has the count... */
+ rela_hdr->sh_size = rela_hdr->sh_entsize * asect->reloc_count;
+ outbound_relocs = (Elf_External_Rela *)
+ bfd_alloc(abfd, asect->reloc_count * sizeof(Elf_External_Rela));
+ for (idx = 0; idx < asect->reloc_count; idx++)
+ {
+ Elf_Internal_Rela dst;
+ arelent *ptr;
+ Elf_External_Rela *src;
+
+ ptr = asect->orelocation[idx];
+ src = outbound_relocs + idx;
+ if (asect->flags & SEC_RELOC)
+ dst.r_offset = ptr->address - asect->vma;
+ else
+ dst.r_offset = ptr->address;
+
+ dst.r_info = ELF_R_INFO(1 /*ptr->sym_ptr_ptr*/, /* needs index into symtab (FIXME) */
+ ptr->howto->type);
+
+ dst.r_addend = ptr->addend;
+ elf_swap_reloca_out(abfd, &dst, src);
+ }
+ rela_hdr->contents = (void*)outbound_relocs;
+ }
+ }
+}
+
+static void
+DEFUN (elf_fake_sections, (abfd, asect, obj),
+ bfd *abfd AND
+ asection *asect AND
+ PTR obj)
+{
+ elf_sect_thunk *thunk = (elf_sect_thunk*)obj;
+ /* most of what is in bfd_shdr_from_section goes in here... */
+ /* and all of these sections generate at *least* one ELF section. */
+ int this_section;
+ int idx;
+
+ /* check if we're making a PROGBITS section... */
+ /* if ((asect->flags & SEC_ALLOC) && (asect->flags & SEC_LOAD)) */
+ /* this was too strict... what *do* we want to check here? */
+ if(1)
+ {
+ Elf_Internal_Shdr *this_hdr;
+ this_section = thunk->i_ehdr->e_shnum++;
+ this_hdr = &thunk->i_shdrp[this_section];
+ this_hdr->sh_name =
+ bfd_add_to_strtab (abfd, thunk->shstrtab, asect->name);
+ /* we need to log the type *now* so that elf_section_from_bfd_section
+ can find us... have to set rawdata too. */
+ this_hdr->rawdata = (void*)asect;
+ if ((asect->flags & SEC_ALLOC) && (asect->flags & SEC_LOAD))
+ this_hdr->sh_type = SHT_PROGBITS;
+ else
+ /* what *do* we put here? */
+ this_hdr->sh_type = SHT_PROGBITS;
+
+
+ if (asect->flags & SEC_RELOC)
+ {
+ /* emit a reloc section, and thus strtab and symtab... */
+ Elf_Internal_Shdr *rela_hdr;
+ Elf_Internal_Shdr *symtab_hdr;
+ Elf_Internal_Shdr *symstrtab_hdr;
+ Elf_External_Rela *outbound_relocs;
+ Elf_External_Sym *outbound_syms;
+ int rela_section;
+ int symstrtab_section;
+
+ /* note that only one symtab is used, so just remember it
+ for now */
+ if (! thunk->symtab_section)
+ {
+ thunk->symtab_section = thunk->i_ehdr->e_shnum++;
+ symtab_hdr = &thunk->i_shdrp[thunk->symtab_section];
+ symtab_hdr->sh_name =
+ bfd_add_to_strtab (abfd, thunk->shstrtab, ".symtab");
+ symtab_hdr->sh_type = SHT_SYMTAB;
+ symtab_hdr->sh_entsize = sizeof (Elf_External_Sym);
+
+ symstrtab_section = thunk->i_ehdr->e_shnum++;
+ BFD_ASSERT(symstrtab_section == thunk->symtab_section+1);
+ symstrtab_hdr = &thunk->i_shdrp[symstrtab_section];
+ symtab_hdr->sh_link = symstrtab_section;
+ symstrtab_hdr->sh_name =
+ bfd_add_to_strtab (abfd, thunk->shstrtab, ".strtab");
+ symstrtab_hdr->sh_type = SHT_STRTAB;
+
+ symtab_hdr->contents = 0;
+ symstrtab_hdr->contents = 0;
+ symstrtab_hdr->sh_size = 0;
+ }
+ else
+ symtab_hdr = &thunk->i_shdrp[thunk->symtab_section];
+
+ rela_section = thunk->i_ehdr->e_shnum++;
+ rela_hdr = &thunk->i_shdrp[rela_section];
+ rela_hdr->sh_name =
+ bfd_add_2_to_strtab (abfd, thunk->shstrtab, ".rela", asect->name);
+ rela_hdr->sh_type = SHT_RELA;
+ rela_hdr->sh_link = thunk->symtab_section;
+ rela_hdr->sh_info = this_section;
+ rela_hdr->sh_entsize = sizeof (Elf_External_Rela);
+ }
+ }
+}
+
+
+static boolean
+DEFUN (elf_compute_section_file_positions, (abfd), bfd *abfd)
+{
+ Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
+ Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */
+ struct strtab *shstrtab;
+ int count, maxsections;
+ int outbase;
+ elf_sect_thunk est;
+
+ if (! elf_shstrtab (abfd)) {
+ i_ehdrp = elf_elfheader (abfd); /* build new header in tdata memory */
+ shstrtab = bfd_new_strtab(abfd);
+
+ i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
+ i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
+ i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
+ i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
+
+ i_ehdrp->e_ident[EI_CLASS] = ELFCLASS32; /* FIXME: find out from bfd */
+ i_ehdrp->e_ident[EI_DATA] =
+ abfd->xvec->byteorder_big_p ? ELFDATA2MSB : ELFDATA2LSB;
+ i_ehdrp->e_ident[EI_VERSION] = EV_CURRENT;
+
+ for(count = EI_PAD; count < EI_NIDENT; count ++)
+ i_ehdrp->e_ident[count] = 0;
+
+ i_ehdrp->e_type = (abfd->flags & EXEC_P)? ET_EXEC : ET_REL;
+ switch(bfd_get_arch(abfd))
+ {
+ case bfd_arch_unknown:
+ i_ehdrp->e_machine = EM_NONE;
+ break;
+ case bfd_arch_sparc:
+ i_ehdrp->e_machine = EM_SPARC;
+ break;
+ case bfd_arch_i386:
+ i_ehdrp->e_machine = EM_386;
+ break;
+ case bfd_arch_m68k:
+ i_ehdrp->e_machine = EM_68K;
+ break;
+ case bfd_arch_m88k:
+ i_ehdrp->e_machine = EM_88K;
+ break;
+ case bfd_arch_i860:
+ i_ehdrp->e_machine = EM_860;
+ break;
+ case bfd_arch_mips: /* MIPS Rxxxx */
+ i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */
+ break;
+ /* also note that EM_M32, AT&T WE32100 is unknown to bfd */
+ default:
+ i_ehdrp->e_machine = EM_NONE;
+ }
+ i_ehdrp->e_version = EV_CURRENT;
+ i_ehdrp->e_ehsize = sizeof(Elf_External_Ehdr);
+
+ /* no program header, for now. */
+ i_ehdrp->e_phoff = 0;
+ i_ehdrp->e_phentsize = 0;
+ i_ehdrp->e_phnum = 0;
+
+ /* each bfd section is section header entry */
+ i_ehdrp->e_entry = bfd_get_start_address (abfd);
+ i_ehdrp->e_shentsize = sizeof (Elf_External_Shdr);
+
+ /* figure at most each section can have a rel, strtab, symtab */
+ maxsections = 4*bfd_count_sections(abfd)+2;
+
+ i_ehdrp->e_shoff = i_ehdrp->e_ehsize;
+
+ /* and we'll just have to fix up the offsets later. */
+ /* outbase += i_ehdr.e_shentsize * i_ehdr.e_shnum; */
+
+ i_shdrp = (Elf_Internal_Shdr *)
+ bfd_alloc (abfd, sizeof (*i_shdrp) * maxsections);
+ if (! i_shdrp)
+ {
+ bfd_error = no_memory;
+ return (false);
+ }
+ for (count=0; count < maxsections; count++)
+ {
+ i_shdrp[count].rawdata = 0;
+ i_shdrp[count].contents = 0;
+ }
+
+
+ i_shdrp[0].sh_name = 0;
+ i_shdrp[0].sh_type = SHT_NULL;
+ i_shdrp[0].sh_flags = 0;
+ i_shdrp[0].sh_addr = 0;
+ i_shdrp[0].sh_offset = 0;
+ i_shdrp[0].sh_size = 0;
+ i_shdrp[0].sh_link = SHN_UNDEF;
+ i_shdrp[0].sh_info = 0;
+ i_shdrp[0].sh_addralign = 0;
+ i_shdrp[0].sh_entsize = 0;
+
+ i_ehdrp->e_shnum = 1;
+
+ elf_elfsections (abfd) = i_shdrp;
+ elf_shstrtab (abfd) = shstrtab;
+ }
+ est.i_ehdr = elf_elfheader(abfd);
+ est.i_shdrp = elf_elfsections(abfd);
+ est.shstrtab = elf_shstrtab(abfd);
+ est.symtab_section = 0; /* elf_fake_sections fils it in */
+
+ bfd_map_over_sections(abfd, elf_fake_sections, &est);
+ elf_onesymtab (abfd) = est.symtab_section;
+ return (true);
}
static boolean
DEFUN (elf_write_object_contents, (abfd), bfd *abfd)
{
- fprintf (stderr, "elf_write_object_contents unimplemented\n");
- fflush (stderr);
- abort ();
- return (false);
+ Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
+ Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
+ Elf_External_Phdr *x_phdrp; /* Program header table, external form */
+ Elf_Internal_Phdr *i_phdrp; /* Program header table, internal form */
+ Elf_External_Shdr *x_shdrp; /* Section header table, external form */
+ Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */
+ asection *nsect;
+ int maxsections;
+ elf_sect_thunk est;
+
+ int outbase = 0;
+ int count;
+ struct strtab *shstrtab;
+
+ if(abfd->output_has_begun == false)
+ elf_compute_section_file_positions(abfd);
+
+ i_ehdrp = elf_elfheader (abfd);
+ i_shdrp = elf_elfsections (abfd);
+ shstrtab = elf_shstrtab (abfd);
+
+ est.i_ehdr = i_ehdrp;
+ est.i_shdrp = i_shdrp;
+ est.shstrtab = shstrtab;
+ est.symtab_section = elf_onesymtab (abfd); /* filled in by elf_fake */
+
+ bfd_map_over_sections(abfd, elf_make_sections, &est);
+
+ /* dump out the one symtab */
+ {
+ int symcount = bfd_get_symcount (abfd);
+ asymbol ** syms = bfd_get_outsymbols (abfd);
+ struct strtab * stt = bfd_new_strtab (abfd);
+ Elf_Internal_Shdr *symtab_hdr;
+ Elf_Internal_Shdr *symstrtab_hdr;
+ int symstrtab_section;
+ Elf_External_Sym *outbound_syms;
+ int idx;
+
+ symtab_hdr = &i_shdrp[est.symtab_section];
+ symtab_hdr->sh_type = SHT_SYMTAB;
+ symtab_hdr->sh_entsize = sizeof (Elf_External_Sym);
+ symtab_hdr->sh_size = symtab_hdr->sh_entsize * symcount;
+
+ /* see assert in elf_fake_sections that supports this: */
+ symstrtab_section = est.symtab_section+1;
+ symstrtab_hdr = &i_shdrp[symstrtab_section];
+ symtab_hdr->sh_link = symstrtab_section;
+ symstrtab_hdr->sh_type = SHT_STRTAB;
+
+ outbound_syms = (Elf_External_Sym*)
+ bfd_alloc(abfd, (1+symcount) * sizeof(Elf_External_Sym));
+ /* now generate the data (for "contents") */
+ for (idx = 0; idx < symcount; idx++)
+ {
+ Elf_Internal_Sym sym;
+ sym.st_name = bfd_add_to_strtab (abfd, stt, syms[idx]->name);
+ sym.st_value = syms[idx]->value;
+ sym.st_size = 0; /* we should recover this (FIXME) */
+ if (syms[idx]->flags & BSF_WEAK)
+ sym.st_info = ELF_ST_INFO(STB_WEAK, STT_OBJECT);
+ else if (syms[idx]->flags & BSF_LOCAL)
+ sym.st_info = ELF_ST_INFO(STB_LOCAL, STT_OBJECT);
+ else if (syms[idx]->flags & BSF_GLOBAL)
+ sym.st_info = ELF_ST_INFO(STB_GLOBAL, STT_OBJECT);
+ else if (syms[idx]->flags & BSF_SECTION_SYM)
+ sym.st_info = ELF_ST_INFO(STB_LOCAL, STT_SECTION);
+ else if (syms[idx]->flags & BSF_FILE)
+ sym.st_info = ELF_ST_INFO(STB_LOCAL, STT_FILE);
+
+ sym.st_other = 0;
+ if (syms[idx]->section)
+ sym.st_shndx =
+ elf_section_from_bfd_section(abfd,
+ syms[idx]->section->output_section);
+ else
+ sym.st_shndx = SHN_UNDEF;
+
+ elf_swap_symbol_out (abfd, &sym, outbound_syms+idx+1);
+ }
+ {
+ /* fill in 0th symbol */
+ Elf_Internal_Sym sym;
+ sym.st_name = 0;
+ sym.st_value = 0;
+ sym.st_size = 0;
+ sym.st_info = 0;
+ sym.st_other = 0;
+ sym.st_shndx = SHN_UNDEF;
+ elf_swap_symbol_out (abfd, &sym, outbound_syms);
+ }
+ symtab_hdr->contents = (void*)outbound_syms;
+ symstrtab_hdr->contents = (void*)stt->tab;
+ symstrtab_hdr->sh_size = stt->length;
+ }
+
+ /* put the strtab out too... */
+ {
+ Elf_Internal_Shdr *this_hdr;
+ int this_section;
+
+ this_section = i_ehdrp->e_shnum++;
+ i_ehdrp->e_shstrndx = this_section;
+ this_hdr = &i_shdrp[this_section];
+ this_hdr->sh_name = bfd_add_to_strtab (abfd, shstrtab, ".shstrtab");
+ this_hdr->sh_size = shstrtab->length;
+ this_hdr->contents = (void*)shstrtab->tab;
+ }
+
+ outbase = i_ehdrp->e_ehsize;
+
+ /* swap the header before spitting it out... */
+ elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr);
+ bfd_seek (abfd, 0L, SEEK_SET);
+ bfd_write ((PTR) &x_ehdr, sizeof(x_ehdr), 1, abfd);
+
+ outbase += i_ehdrp->e_shentsize * i_ehdrp->e_shnum;
+
+ /* now we fix up the offsets... */
+ for (count = 0; count < i_ehdrp->e_shnum; count ++)
+ {
+ i_shdrp[count].sh_offset = outbase;
+ outbase += i_shdrp[count].sh_size;
+ }
+
+ /* at this point we've concocted all the ELF sections... */
+ x_shdrp = (Elf_External_Shdr *)
+ bfd_alloc (abfd, sizeof (*x_shdrp) * (i_ehdrp->e_shnum));
+ if (! x_shdrp)
+ {
+ bfd_error = no_memory;
+ return (false);
+ }
+
+ for (count = 0; count < i_ehdrp->e_shnum; count ++)
+ {
+ elf_swap_shdr_out (abfd, i_shdrp+count, x_shdrp+count);
+ }
+ bfd_write ((PTR) x_shdrp, sizeof(*x_shdrp), i_ehdrp->e_shnum, abfd);
+ /* need to dump the string table too... */
+
+ /* after writing the headers, we need to write the sections too... */
+ nsect = abfd->sections;
+ for (count = 0; count < i_ehdrp->e_shnum; count ++)
+ {
+ if(i_shdrp[count].contents)
+ {
+ bfd_seek (abfd, i_shdrp[count].sh_offset, SEEK_SET);
+ bfd_write (i_shdrp[count].contents, i_shdrp[count].sh_size, 1, abfd);
+ }
+ }
+
+ /* sample use of bfd:
+ * bfd_seek (abfd, 0L, false);
+ * bfd_write ((PTR) &exec_bytes, 1, EXEC_BYTES_SIZE, abfd);
+ * if (bfd_seek(abfd, scn_base, SEEK_SET) != 0)
+ * return false;
+ * old = bfd_tell(abfd);
+ */
+
+ return true;
+
}
/* Given an index of a section, retrieve a pointer to it. Note
that for our purposes, sections are indexed by {1, 2, ...} with
0 being an illegal index. */
+/* In the original, each ELF section went into exactly one BFD
+ section. This doesn't really make sense, so we need a real mapping.
+ The mapping has to hide in the Elf_Internal_Shdr since asection
+ doesn't have anything like a tdata field... */
+
static struct sec *
-DEFUN (section_from_bfd_index, (abfd, index),
+DEFUN (section_from_elf_index, (abfd, index),
bfd *abfd AND
int index)
{
- if (index > 0)
+ Elf_Internal_Shdr *i_shdrp = elf_elfsections (abfd);
+ Elf_Internal_Shdr *hdr = i_shdrp + index;
+
+ switch (hdr->sh_type)
{
- struct sec *answer = abfd -> sections;
- while (--index > 0)
- {
- answer = answer -> next;
- }
- return (answer);
+ /* ELF sections that map to BFD sections */
+ case SHT_PROGBITS:
+ case SHT_NOBITS:
+ if (! hdr->rawdata)
+ bfd_section_from_shdr (abfd, index);
+ return (struct sec *)hdr->rawdata;
+ break;
+ default:
+ return (struct sec *)&bfd_abs_section;
}
- return (NULL);
+}
+
+/* given a section, search the header to find them... */
+static int
+DEFUN (elf_section_from_bfd_section, (abfd, asect),
+ bfd *abfd AND
+ struct sec *asect)
+{
+ Elf_Internal_Shdr *i_shdrp = elf_elfsections (abfd);
+ int index;
+ Elf_Internal_Shdr *hdr;
+ int maxindex = elf_elfheader (abfd)->e_shnum;
+
+ for(index = 0; index < maxindex; index++) {
+ hdr = &i_shdrp[index];
+ switch (hdr->sh_type)
+ {
+ /* ELF sections that map to BFD sections */
+ case SHT_PROGBITS:
+ case SHT_NOBITS:
+ if (hdr->rawdata)
+ {
+ if (((struct sec *)(hdr->rawdata)) == asect)
+ return index;
+ }
+ break;
+ default:
+ break;
+ }
+ }
+ return 0;
}
static boolean
-DEFUN (elf_slurp_symbol_table, (abfd), bfd *abfd)
+DEFUN (elf_slurp_symbol_table, (abfd, symptrs),
+ bfd *abfd AND
+ asymbol **symptrs) /* Buffer for generated bfd symbols */
{
+ Elf_Internal_Shdr *i_shdrp = elf_elfsections (abfd);
+ Elf_Internal_Shdr *hdr = i_shdrp + elf_onesymtab (abfd);
int symcount; /* Number of external ELF symbols */
+ int i;
char *strtab; /* Buffer for raw ELF string table section */
asymbol *sym; /* Pointer to current bfd symbol */
asymbol *symbase; /* Buffer for generated bfd symbols */
- asymbol **vec; /* Pointer to current bfd symbol pointer */
Elf_Internal_Sym i_sym;
- Elf_External_Sym x_sym;
-
+ Elf_External_Sym *x_symp;
+
+ /* this is only valid because there is only one symtab... */
+ /* FIXME: This is incorrect, there may also be a dynamic symbol
+ table which is a subset of the full symbol table. We either need
+ to be prepared to read both (and merge them) or ensure that we
+ only read the full symbol table. Currently we only get called to
+ read the full symbol table. -fnf */
if (bfd_get_outsymbols (abfd) != NULL)
{
return (true);
}
- /* Slurp in the string table. We will keep it around permanently, as
- long as the bfd is in use, since we will end up setting up pointers
- into it for the names of all the symbols. */
-
- if (bfd_seek (abfd, elf_strtab_filepos (abfd), SEEK_SET) == -1)
- {
- bfd_error = system_call_error;
- return (false);
- }
- if ((strtab = bfd_alloc (abfd, elf_strtab_filesz (abfd))) == NULL)
- {
- bfd_error = system_call_error;
- return (false);
- }
- if (bfd_read ((PTR) strtab, elf_strtab_filesz (abfd), 1, abfd) !=
- elf_strtab_filesz (abfd))
- {
- bfd_error = system_call_error;
- return (false);
- }
-
/* Read each raw ELF symbol, converting from external ELF form to
internal ELF form, and then using the information to create a
canonical bfd symbol table entry.
- Note that be allocate the initial bfd canonical symbol buffer
+ Note that we allocate the initial bfd canonical symbol buffer
based on a one-to-one mapping of the ELF symbols to canonical
- symbols. However, it is likely that not all the ELF symbols will
- be used, so there will be some space leftover at the end. Once
- we know how many symbols we actual generate, we realloc the buffer
- to the correct size and then build the pointer vector. */
+ symbols. We actually use all the ELF symbols, so there will be no
+ space left over at the end. When we have all the symbols, we
+ build the caller's pointer vector. */
- if (bfd_seek (abfd, elf_symtab_filepos (abfd), SEEK_SET) == -1)
+ if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) == -1)
{
bfd_error = system_call_error;
return (false);
}
- symcount = elf_symtab_filesz(abfd) / sizeof (Elf_External_Sym);
- sym = symbase = (asymbol *) bfd_zalloc (abfd, symcount * sizeof (asymbol));
+ symcount = hdr->sh_size / sizeof (Elf_External_Sym);
+ symbase = (asymbol *) bfd_zalloc (abfd, symcount * sizeof (asymbol));
+ sym = symbase;
- while (symcount-- > 0)
+ /* Temporarily allocate room for the raw ELF symbols. */
+ x_symp = (Elf_External_Sym *) malloc (symcount * sizeof (Elf_External_Sym));
+
+ if (bfd_read ((PTR) x_symp, sizeof (Elf_External_Sym), symcount, abfd)
+ != symcount * sizeof (Elf_External_Sym))
{
- if (bfd_read ((PTR) &x_sym, sizeof (x_sym), 1, abfd) != sizeof (x_sym))
+ free ((PTR)x_symp);
+ bfd_error = system_call_error;
+ return (false);
+ }
+ /* Skip first symbol, which is a null dummy. */
+ for (i = 1; i < symcount; i++)
+ {
+ elf_swap_symbol_in (abfd, x_symp + i, &i_sym);
+ sym -> the_bfd = abfd;
+ if (i_sym.st_name > 0)
+ sym -> name = elf_string_from_elf_section(abfd, hdr->sh_link,
+ i_sym.st_name);
+ else
+ sym -> name = "unnamed"; /* perhaps should include the number? */
+ sym -> value = i_sym.st_value;
+/* FIXME -- this is almost certainly bogus. It's from Pace Willisson's
+hasty Solaris support, to pass the sizes of object files or functions
+down into GDB via the back door, to circumvent some other kludge in
+ sym -> udata = (PTR)i_sym.st_size;
+/* FIXME -- end of bogosity. */
+ if (i_sym.st_shndx > 0 && i_sym.st_shndx < SHN_LORESERV)
{
- bfd_error = system_call_error;
- return (false);
+ sym -> section = section_from_elf_index (abfd, i_sym.st_shndx);
}
- elf_swap_symbol_in (abfd, &x_sym, &i_sym);
- if (i_sym.st_name > 0)
+ else if (i_sym.st_shndx == SHN_ABS)
{
- sym -> the_bfd = abfd;
- sym -> name = strtab + i_sym.st_name;
- sym -> value = i_sym.st_value;
- if (i_sym.st_shndx > 0 && i_sym.st_shndx < SHN_LORESERV)
- {
- /* Note: This code depends upon there being an ordered
- one-for-one mapping of ELF sections to bfd sections. */
- sym -> section = section_from_bfd_index (abfd, i_sym.st_shndx);
- }
- else if (i_sym.st_shndx == SHN_ABS)
- {
- sym -> flags |= BSF_ABSOLUTE;
- }
- else if (i_sym.st_shndx == SHN_COMMON)
- {
- sym -> flags |= BSF_FORT_COMM;
- }
- switch (ELF_ST_BIND (i_sym.st_info))
- {
- case STB_LOCAL:
- sym -> flags |= BSF_LOCAL;
- break;
- case STB_GLOBAL:
- sym -> flags |= (BSF_GLOBAL | BSF_EXPORT);
- break;
- case STB_WEAK:
- sym -> flags |= BSF_WEAK;
- break;
- }
- sym++;
+ sym -> section = &bfd_abs_section;
+ }
+ else if (i_sym.st_shndx == SHN_COMMON)
+ {
+ sym -> section = &bfd_com_section;
+ }
+ else if (i_sym.st_shndx == SHN_UNDEF)
+ {
+ sym -> section = &bfd_und_section;
+ }
+ else
+ sym -> section = &bfd_abs_section;
+
+ switch (ELF_ST_BIND (i_sym.st_info))
+ {
+ case STB_LOCAL:
+ sym -> flags |= BSF_LOCAL;
+ break;
+ case STB_GLOBAL:
+ sym -> flags |= (BSF_GLOBAL | BSF_EXPORT);
+ break;
+ case STB_WEAK:
+ sym -> flags |= BSF_WEAK;
+ break;
}
+
+ switch (ELF_ST_TYPE (i_sym.st_info))
+ {
+ case STT_SECTION:
+ sym->flags |= BSF_SECTION_SYM | BSF_DEBUGGING;
+ break;
+ case STT_FILE:
+ sym->flags |= BSF_FILE | BSF_DEBUGGING;
+ break;
+ }
+ sym++;
}
- bfd_get_symcount(abfd) = symcount = sym - symbase;
- sym = symbase = (asymbol *)
- bfd_realloc (abfd, symbase, symcount * sizeof (asymbol));
- bfd_get_outsymbols(abfd) = vec = (asymbol **)
- bfd_alloc (abfd, symcount * sizeof (asymbol *));
+ /* We rely on the zalloc to clear out the final symbol entry. */
- while (symcount-- > 0)
+ /* We're now done with the raw symbols. */
+ free ((PTR)x_symp);
+
+ bfd_get_symcount(abfd) = symcount = sym - symbase;
+
+ /* Fill in the user's symbol pointer vector if needed. */
+ if (symptrs)
{
- *vec++ = sym++;
+ sym = symbase;
+ while (symcount-- > 0)
+ {
+ *symptrs++ = sym++;
+ }
+ *symptrs = 0; /* Final null pointer */
}
return (true);
/* Return the number of bytes required to hold the symtab vector.
Note that we base it on the count plus 1, since we will null terminate
- the vector allocated based on this size. */
+ the vector allocated based on this size. However, the ELF symbol table
+ always has a dummy entry as symbol #0, so it ends up even. */
static unsigned int
DEFUN (elf_get_symtab_upper_bound, (abfd), bfd *abfd)
{
- unsigned int symtab_size = 0;
+ unsigned int symcount;
+ unsigned int symtab_size;
+ Elf_Internal_Shdr *i_shdrp = elf_elfsections (abfd);
+ Elf_Internal_Shdr *hdr = i_shdrp + elf_onesymtab (abfd);
- if (elf_slurp_symbol_table (abfd))
- {
- symtab_size = (bfd_get_symcount (abfd) + 1) * (sizeof (asymbol));
- }
+ symcount = hdr->sh_size / sizeof (Elf_External_Sym);
+ symtab_size = (symcount - 1 + 1) * (sizeof (asymbol));
return (symtab_size);
}
+/*
+ This function return the number of bytes required to store the
+ relocation information associated with section <<sect>>
+ attached to bfd <<abfd>>
+
+*/
static unsigned int
elf_get_reloc_upper_bound (abfd, asect)
bfd *abfd;
sec_ptr asect;
{
- fprintf (stderr, "elf_get_reloc_upper_bound unimplemented\n");
- fflush (stderr);
+ if (asect->flags & SEC_RELOC)
+ {
+ /* either rel or rela */
+ return asect->_raw_size;
+ }
+ else
+ return (0);
+}
+
+/* FIXME!!! sparc howto should go into elf-32-sparc.c */
+#ifdef sparc
+enum reloc_type
+ {
+ R_SPARC_NONE = 0,
+ R_SPARC_8, R_SPARC_16, R_SPARC_32,
+ R_SPARC_DISP8, R_SPARC_DISP16, R_SPARC_DISP32,
+ R_SPARC_WDISP30, R_SPARC_WDISP22,
+ R_SPARC_HI22, R_SPARC_22,
+ R_SPARC_13, R_SPARC_LO10,
+ R_SPARC_GOT10, R_SPARC_GOT13, R_SPARC_GOT22,
+ R_SPARC_PC10, R_SPARC_PC22,
+ R_SPARC_WPLT30,
+ R_SPARC_COPY,
+ R_SPARC_GLOB_DAT, R_SPARC_JMP_SLOT,
+ R_SPARC_RELATIVE,
+ R_SPARC_UA32,
+ };
+
+#define RELOC_TYPE_NAMES \
+ "R_SPARC_NONE", \
+ "R_SPARC_8", "R_SPARC_16", "R_SPARC_32", \
+ "R_SPARC_DISP8", "R_SPARC_DISP16", "R_SPARC_DISP32", \
+ "R_SPARC_WDISP30", "R_SPARC_WDISP22", \
+ "R_SPARC_HI22", "R_SPARC_22", \
+ "R_SPARC_13", "R_SPARC_LO10", \
+ "R_SPARC_GOT10", "R_SPARC_GOT13", "R_SPARC_GOT22", \
+ "R_SPARC_PC10", "R_SPARC_PC22", \
+ "R_SPARC_WPLT30", \
+ "R_SPARC_COPY", \
+ "R_SPARC_GLOB_DAT", "R_SPARC_JMP_SLOT", \
+ "R_SPARC_RELATIVE", \
+ "R_SPARC_UA32"
+
+static reloc_howto_type elf_howto_table[] =
+{
+ HOWTO(R_SPARC_NONE, 0,0, 0,false,0,false,false, 0,"R_SPARC_NONE", false,0,0x00000000,false),
+ HOWTO(R_SPARC_8, 0,0, 8,false,0,true, true, 0,"R_SPARC_8", false,0,0x000000ff,false),
+ HOWTO(R_SPARC_16, 0,1,16,false,0,true, true, 0,"R_SPARC_16", false,0,0x0000ffff,false),
+ HOWTO(R_SPARC_32, 0,2,32,false,0,true, true, 0,"R_SPARC_32", false,0,0xffffffff,false),
+ HOWTO(R_SPARC_DISP8, 0,0, 8,true, 0,false, true, 0,"R_SPARC_DISP8", false,0,0x000000ff,false),
+ HOWTO(R_SPARC_DISP16, 0,1,16,true, 0,false, true, 0,"R_SPARC_DISP16", false,0,0x0000ffff,false),
+ HOWTO(R_SPARC_DISP32, 0,2,32,true, 0,false, true, 0,"R_SPARC_DISP32", false,0,0x00ffffff,false),
+ HOWTO(R_SPARC_WDISP30,2,2,30,true, 0,false, true, 0,"R_SPARC_WDISP30",false,0,0x3fffffff,false),
+ HOWTO(R_SPARC_WDISP22,2,2,22,true, 0,false, true, 0,"R_SPARC_WDISP22",false,0,0x003fffff,false),
+ HOWTO(R_SPARC_HI22, 10,2,22,false,0,true, false, 0,"R_SPARC_HI22", false,0,0x003fffff,false),
+ HOWTO(R_SPARC_22, 0,2,22,false,0,true, true, 0,"R_SPARC_22", false,0,0x003fffff,false),
+ HOWTO(R_SPARC_13, 0,1,13,false,0,true, true, 0,"R_SPARC_13", false,0,0x00001fff,false),
+ HOWTO(R_SPARC_LO10, 0,1,10,false,0,true, false, 0,"R_SPARC_LO10", false,0,0x000003ff,false),
+ HOWTO(R_SPARC_GOT10, 0,1,10,false,0,false, true, 0,"R_SPARC_GOT10", false,0,0x000003ff,false),
+ HOWTO(R_SPARC_GOT13, 0,1,13,false,0,false, true, 0,"R_SPARC_GOT13", false,0,0x00001fff,false),
+ HOWTO(R_SPARC_GOT22, 10,2,22,false,0,false, true, 0,"R_SPARC_GOT22", false,0,0x003fffff,false),
+ HOWTO(R_SPARC_PC10, 0,1,10,false,0,true, true, 0,"R_SPARC_PC10", false,0,0x000003ff,false),
+ HOWTO(R_SPARC_PC22, 0,2,22,false,0,true, true, 0,"R_SPARC_PC22", false,0,0x003fffff,false),
+ HOWTO(R_SPARC_WPLT30, 0,0,00,false,0,false,false, 0,"R_SPARC_WPLT30", false,0,0x00000000,false),
+ HOWTO(R_SPARC_COPY, 0,0,00,false,0,false,false, 0,"R_SPARC_COPY", false,0,0x00000000,false),
+ HOWTO(R_SPARC_GLOB_DAT,0,0,00,false,0,false,false,0,"R_SPARC_GLOB_DAT",false,0,0x00000000,false),
+ HOWTO(R_SPARC_JMP_SLOT,0,0,00,false,0,false,false,0,"R_SPARC_JMP_SLOT",false,0,0x00000000,false),
+ HOWTO(R_SPARC_RELATIVE,0,0,00,false,0,false,false,0,"R_SPARC_RELATIVE",false,0,0x00000000,false),
+ HOWTO(R_SPARC_UA32, 0,0,00,false,0,false,false,0,"R_SPARC_UA32", false,0,0x00000000,false),
+};
+#endif
+
+static void
+DEFUN(elf_info_to_howto, (abfd, cache_ptr, dst),
+ bfd *abfd AND
+ arelent *cache_ptr AND
+ Elf_Internal_Rela *dst)
+{
+ /* FIXME!!! just doing sparc for now... */
+#ifdef sparc
+ BFD_ASSERT (ELF_R_TYPE(dst->r_info) < 24);
+
+ cache_ptr->howto = &elf_howto_table[ELF_R_TYPE(dst->r_info)];
+#else
+ fprintf (stderr, "elf_info_to_howto not implemented\n");
abort ();
- return (0);
+#endif
}
+
+static boolean
+DEFUN(elf_slurp_reloca_table,(abfd, asect, symbols),
+ bfd *abfd AND
+ sec_ptr asect AND
+ asymbol **symbols)
+{
+ Elf_External_Rela *native_relocs;
+ arelent *reloc_cache;
+ arelent *cache_ptr;
+
+ unsigned int idx;
+
+ if (asect->relocation)
+ return true;
+ if (asect->reloc_count == 0)
+ return true;
+ if (asect->flags & SEC_CONSTRUCTOR)
+ return true;
+
+ bfd_seek (abfd, asect->rel_filepos, SEEK_SET);
+ native_relocs = (Elf_External_Rela *)
+ bfd_alloc(abfd, asect->reloc_count * sizeof(Elf_External_Rela));
+ bfd_read ((PTR) native_relocs,
+ sizeof(Elf_External_Rela), asect->reloc_count, abfd);
+
+ reloc_cache = (arelent *)
+ bfd_alloc(abfd, (size_t) (asect->reloc_count * sizeof(arelent)));
+
+ if (! reloc_cache) {
+ bfd_error = no_memory;
+ return false;
+ }
+
+ for (idx = 0; idx < asect->reloc_count; idx ++)
+ {
+#ifdef RELOC_PROCESSING
+ /* sparc, 68k, 88k, 860 use rela only. */
+ /* 386 and we32000 use rel only... fix it for them later. */
+ Elf_Internal_Rela dst;
+ Elf_External_Rela *src;
+
+ cache_ptr = reloc_cache + idx;
+ src = native_relocs + idx;
+ elf_swap_reloca_in(abfd, src, &dst);
+
+ RELOC_PROCESSING(cache_ptr, &dst, symbols, abfd, asect);
+#else
+ Elf_Internal_Rela dst;
+ asymbol *ptr;
+ Elf_External_Rela *src;
+
+ cache_ptr = reloc_cache + idx;
+ src = native_relocs + idx;
+
+ elf_swap_reloca_in(abfd, src, &dst);
+
+ if(asect->flags & SEC_RELOC)
+ {
+ /* relocatable, so the offset is off of the section */
+ cache_ptr->address = dst.r_offset + asect->vma;
+ }
+ else
+ {
+ /* non-relocatable, so the offset a virtual address */
+ cache_ptr->address = dst.r_offset;
+ }
+ /* ELF_R_SYM(dst.r_info) is the symbol table offset... */
+ cache_ptr->sym_ptr_ptr = symbols + ELF_R_SYM(dst.r_info);
+ cache_ptr->addend = dst.r_addend;
+ /* ptr = *(cache_ptr->sym_ptr_ptr); */
+
+ /* Fill in the cache_ptr->howto field from dst.r_type */
+ elf_info_to_howto(abfd, cache_ptr, &dst);
+#endif
+ }
+
+ asect->relocation = reloc_cache;
+ return true;
+}
+
static unsigned int
elf_canonicalize_reloc (abfd, section, relptr, symbols)
arelent **relptr;
asymbol **symbols;
{
- fprintf (stderr, "elf_canonicalize_reloc unimplemented\n");
- fflush (stderr);
- abort ();
- return (0);
+ arelent *tblptr = section->relocation;
+ unsigned int count = 0;
+
+ /* snarfed from coffcode.h */
+ /* FIXME: this could be reloc... */
+ elf_slurp_reloca_table(abfd, section, symbols);
+
+ tblptr = section->relocation;
+ if (!tblptr)
+ return 0;
+
+ for (; count++ < section->reloc_count;)
+ *relptr++ = tblptr++;
+
+ *relptr = 0;
+ return section->reloc_count;
}
static unsigned int
unsigned int symcount;
asymbol **vec;
- if (!elf_slurp_symbol_table (abfd))
- {
- return (0);
- }
+ if (!elf_slurp_symbol_table (abfd, alocation))
+ return (0);
else
- {
- symcount = bfd_get_symcount (abfd);
- vec = bfd_get_outsymbols (abfd);
- while (symcount-- > 0)
- {
- *alocation++ = *vec++;
- }
- *alocation++ = NULL;
- return (bfd_get_symcount (abfd));
- }
+ return (bfd_get_symcount (abfd));
}
static asymbol *
-elf_make_empty_symbol(abfd)
-bfd *abfd;
+DEFUN (elf_make_empty_symbol, (abfd),
+ bfd *abfd)
{
- fprintf (stderr, "elf_make_empty_symbol unimplemented\n");
- fflush (stderr);
- abort ();
- return (NULL);
+ elf_symbol_type *newsym;
+
+ newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (elf_symbol_type));
+ if (! newsym)
+ {
+ bfd_error = no_memory;
+ return (NULL);
+ }
+ else
+ {
+ newsym -> symbol.the_bfd = abfd;
+ return (&newsym -> symbol);
+ }
}
static void
asymbol *symbol AND
bfd_print_symbol_type how)
{
- fprintf (stderr, "elf_print_symbol unimplemented\n");
- fflush (stderr);
- abort ();
+ FILE *file = (FILE *)filep;
+ switch (how)
+ {
+ case bfd_print_symbol_name:
+ fprintf(file, "%s", symbol->name);
+ break;
+ case bfd_print_symbol_more:
+ fprintf(file, "elf %lx %lx",
+ symbol->value,
+ symbol->flags);
+ break;
+ case bfd_print_symbol_nm:
+ case bfd_print_symbol_all:
+ {
+ CONST char *section_name;
+ section_name = symbol->section? symbol->section->name : "(*none*)";
+ bfd_print_symbol_vandf((PTR) file, symbol);
+ fprintf(file, " %s\t%s",
+ section_name,
+ symbol->name);
+ }
+ break;
+ }
+
}
static alent *
enum bfd_architecture arch AND
unsigned long machine)
{
- fprintf (stderr, "elf_set_arch_mach unimplemented\n");
- fflush (stderr);
/* Allow any architecture to be supported by the elf backend */
- return bfd_default_set_arch_mach(abfd, arch, machine);
+ switch(arch)
+ {
+ case bfd_arch_unknown: /* EM_NONE */
+ case bfd_arch_sparc: /* EM_SPARC */
+ case bfd_arch_i386: /* EM_386 */
+ case bfd_arch_m68k: /* EM_68K */
+ case bfd_arch_m88k: /* EM_88K */
+ case bfd_arch_i860: /* EM_860 */
+ case bfd_arch_mips: /* EM_MIPS (MIPS R3000) */
+ return bfd_default_set_arch_mach(abfd, arch, machine);
+ default:
+ return false;
+ }
}
static boolean
abort ();
return (0);
}
+
+boolean
+DEFUN(elf_set_section_contents, (abfd, section, location, offset, count),
+ bfd *abfd AND
+ sec_ptr section AND
+ PTR location AND
+ file_ptr offset AND
+ bfd_size_type count)
+{
+ int dest_sect;
+ void *contents;
+ if (abfd->output_has_begun == false) /* set by bfd.c handler? */
+ {
+ /* do setup calculations (FIXME) */
+ elf_compute_section_file_positions(abfd);
+ }
+#if 0
+ if(bfd_seek (abfd, (file_ptr)section->filepos + offset, SEEK_SET) == -1)
+ return false;
+ if(bfd_write (location, (bfd_size_type)1, count, abfd) != count)
+ return false;
+#endif
+ /* we really just need to save the contents away... */
+ dest_sect = elf_section_from_bfd_section(abfd, section);
+ if(!dest_sect)
+ return false;
+
+ /* FIXME: allocate in set_section_size, then copy in here... */
+ contents = (void*)bfd_alloc(abfd, count);
+ BFD_ASSERT(contents);
+ memcpy(contents, location, count);
+ elf_elfsections (abfd)[dest_sect].contents = contents;
+
+ return true;
+}
+
\f
/* This structure contains everything that BFD knows about a target.
It includes things like its byte order, name, what routines to call
/* Ordinary section reading and writing */
#define elf_new_section_hook _bfd_dummy_new_section_hook
-#define elf_get_section_contents bfd_generic_get_section_contents
-#define elf_set_section_contents bfd_generic_set_section_contents
+#define elf_get_section_contents bfd_generic_get_section_contents
+/* #define elf_set_section_contents bfd_generic_set_section_contents */
#define elf_close_and_cleanup bfd_generic_close_and_cleanup
#define elf_bfd_debug_info_start bfd_void
#define elf_bfd_debug_info_end bfd_void
#define elf_bfd_debug_info_accumulate (PROTO(void,(*),(bfd*, struct sec *))) bfd_void
-
+#define elf_bfd_get_relocated_section_contents \
+ bfd_generic_get_relocated_section_contents
+#define elf_bfd_relax_section bfd_generic_relax_section
bfd_target elf_big_vec =
{
/* name: identify kind of target */
/* section_flags: mask of all section flags */
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY |
- SEC_DATA),
+ SEC_CODE | SEC_DATA),
/* ar_pad_char: pad character for filenames within an archive header
FIXME: this really has nothing to do with ELF, this is a characteristic
projects / binutils.git / blobdiff