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| author | Peter Schauer <Peter.Schauer@mytum.de> | 1994-04-01 08:50:03 +0000 |
|---|---|---|
| committer | Peter Schauer <Peter.Schauer@mytum.de> | 1994-04-01 08:50:03 +0000 |
| commit | 38b90473602f5c7295242ec0cce8f804d171bcbf (patch) | |
| tree | 9e835890af03c6a3c8c8cc2205180734280ad1a3 /gdb/elfread.c | |
| parent | 01f8d30971233e0c259278adf41cc870837e3aed (diff) | |
| download | gdb-38b90473602f5c7295242ec0cce8f804d171bcbf.zip gdb-38b90473602f5c7295242ec0cce8f804d171bcbf.tar.gz gdb-38b90473602f5c7295242ec0cce8f804d171bcbf.tar.bz2 | |
For SVR4 targets, enable gdb to set breakpoints in shared
library functions before the executable is run.
* elfread.c (elf_symtab_read): Handle symbols for shared library
functions.
* sparc-tdep.c (in_solib_trampoline): Renamed to in_plt_section
and moved to objfiles.c.
* objfiles.c (in_plt_section): Moved to here from sparc-tdep.
* config/tm-sysv4.h (IN_SOLIB_TRAMPOLINE): Use new in_plt_section.
* config/sparc/tm-sun4sol2.h (IN_SOLIB_TRAMPOLINE): Removed,
the new generic definition from tm-sysv4.h works for Solaris.
Diffstat (limited to 'gdb/elfread.c')
| -rw-r--r-- | gdb/elfread.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/gdb/elfread.c b/gdb/elfread.c index 89df794..11d4b7e 100644 --- a/gdb/elfread.c +++ b/gdb/elfread.c @@ -311,7 +311,29 @@ elf_symtab_read (abfd, addr, objfile) /* 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 == &bfd_abs_section) + if (sym -> section == &bfd_und_section + && (sym -> flags & BSF_GLOBAL) + && (sym -> flags & BSF_FUNCTION)) + { + /* Symbol is a reference to a function defined in + a shared library. + If its value is non zero then it is usually the + absolute address of the corresponding entry in + the procedure linkage table. + If its value is zero then the dynamic linker has to + resolve the symbol. We are unable to find any + meaningful address for this symbol in the + executable file, so we skip it. + Irix 5 has a zero value for all shared library functions + in the main symbol table. The dynamic symbol table + would provide the right values, but BFD currently + cannot handle dynamic ELF symbol tables. */ + ms_type = mst_solib_trampoline; + symaddr = sym -> value; + if (symaddr == 0) + continue; + } + else if (sym -> section == &bfd_abs_section) { ms_type = mst_abs; } |