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Fix code in elf_symtab_read which attempts to read the standard ELF

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symbol table and add symbol information to the misc function vector.
This allows minimum functionality with non -g compiled code, and is
vital for use with shared libraries (non of which are currently
compiled with -g).

Note to anyone doing any SVR4/gdb work.  This bug was introduced into
gdb just prior to the gdb 4.4 release, thus any versions currently
in the field will have broken shared library support since no symbol
information at all will be available for the shared library.  This
fix, along with one about to go into bfd's elf.c should fix that
problem.
This commit is contained in:
Fred Fish
1992-02-14 01:22:12 +00:00
parent 0c5e345c0f
commit d35bf52d93
2 changed files with 16 additions and 8 deletions
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19
gdb/elfread.c
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@@ -195,25 +195,28 @@ DEFUN (elf_symtab_read, (abfd, addr, mainline),
for (i = 0; i < number_of_symbols; i++)
{
sym = *symbol_table++;
/* Select global symbols that are defined in a specific section
or are absolute. */
if (sym -> flags & BSF_GLOBAL
&& (sym -> section == &bfd_abs_section))
/* Select global/weak symbols that are defined in a specific section.
Note that bfd now puts abs symbols in their own section, so
all symbols we are interested in will have a section. */
if ((sym -> flags & (BSF_GLOBAL | BSF_WEAK))
&& (sym -> section != NULL))
{
symaddr = sym -> value;
if (!mainline)
/* Relocate all non-absolute symbols by base address.
FIXME: Can we eliminate the check for mainline now,
since shouldn't addr be 0 in this case? */
if (!mainline && (sym -> section != &bfd_abs_section))
{
/* Relocate all symbols by base address */
symaddr += addr;
}
/* For non-absolute symbols, use the type of the section
they are relative to, to intuit text/data. Bfd provides
no way of figuring this out for absolute symbols. */
if (sym -> section && (sym -> section -> flags & SEC_CODE))
if (sym -> section -> flags & SEC_CODE)
{
mf_type = mf_text;
}
else if (sym -> section && (sym -> section -> flags & SEC_DATA))
else if (sym -> section -> flags & SEC_DATA)
{
mf_type = mf_data;
}