libdwfl: Add minisymtab support.
Add an auxiliary symbol table dwfl_file aux_sym to Dwfl_Module if all we
have is the dynsym table. The main file might contain a .gnu_debugdata
section. The .gnu_debugdata section is a compressed embedded ELF file
that contains the text (code) section symbols from the symtab table
that are not in the main file dynsym table. dwfl_module_getsymtab (),
dwfl_module_addrsym () and dwfl_module_getsym () will use the auxiliary
symbol table when available (and no full symtab is available from the
debug file).
* libdwflP.h (struct Dwfl_Module): Add aux_sym, aux_symdata,
aux_syments, aux_symstrdata, aux_symxndxdata and aux_first_global.
(dwfl_adjusted_aux_sym_addr): New function.
(dwfl_deadjust_aux_sym_addr): Likewise.
(dwfl_adjusted_st_value): Take and check symfile argument.
(dwfl_deadjust_st_value): Likewise.
* dwfl_module_getdwarf.c (find_prelink_address_sync): Take and
use dwfl_file as argument to set address_sync.
(find_debuginfo): Call find_prelink_address_sync with debug file.
(find_aux_sym): New function.
(find_symtab): Use find_aux_sym if all we have is the dynsym table
and fill in aux DwflModule fields.
(dwfl_module_getsymtab): Return syments plus aux_syments.
(load_symtab): Always set first_global.
* dwfl_module_addrsym.c (dwfl_module_addrsym): Check symfile
when using same_section. Calculate first_global based on both
mod->first_global and mod->aux_first_global.
* dwfl_module.c (__libdwfl_module_free): Free aux_sym.
* dwfl_module_getsym.c (dwfl_module_getsym): Use auxsym table
to retrieve symbol and name if necessary, making sure all locals
from any table come before any globals.
* dwfl_module_info.c (dwfl_module_info): Call dwfl_adjusted_st_value
with symfile.
* relocate.c (resolve_symbol): Likewise.
https://fedoraproject.org/wiki/Features/MiniDebugInfo
Signed-off-by: Mark Wielaard <mjw@redhat.com>
diff --git a/libdwfl/ChangeLog b/libdwfl/ChangeLog
index 6297336..828db08 100644
--- a/libdwfl/ChangeLog
+++ b/libdwfl/ChangeLog
@@ -1,3 +1,30 @@
+2013-01-16 Mark Wielaard <mjw@redhat.com>
+
+ * libdwflP.h (struct Dwfl_Module): Add aux_sym, aux_symdata,
+ aux_syments, aux_symstrdata, aux_symxndxdata and aux_first_global.
+ (dwfl_adjusted_aux_sym_addr): New function.
+ (dwfl_deadjust_aux_sym_addr): Likewise.
+ (dwfl_adjusted_st_value): Take and check symfile argument.
+ (dwfl_deadjust_st_value): Likewise.
+ * dwfl_module_getdwarf.c (find_prelink_address_sync): Take and
+ use dwfl_file as argument to set address_sync.
+ (find_debuginfo): Call find_prelink_address_sync with debug file.
+ (find_aux_sym): New function.
+ (find_symtab): Use find_aux_sym if all we have is the dynsym table
+ and fill in aux DwflModule fields.
+ (dwfl_module_getsymtab): Return syments plus aux_syments.
+ (load_symtab): Always set first_global.
+ * dwfl_module_addrsym.c (dwfl_module_addrsym): Check symfile
+ when using same_section. Calculate first_global based on both
+ mod->first_global and mod->aux_first_global.
+ * dwfl_module.c (__libdwfl_module_free): Free aux_sym.
+ * dwfl_module_getsym.c (dwfl_module_getsym): Use auxsym table
+ to retrieve symbol and name if necessary, making sure all locals
+ from any table come before any globals.
+ * dwfl_module_info.c (dwfl_module_info): Call dwfl_adjusted_st_value
+ with symfile.
+ * relocate.c (resolve_symbol): Likewise.
+
2013-01-07 Roland McGrath <roland@hack.frob.com>
* link_map.c (auxv_format_probe): Handle unaligned 64-bit data, but