From: Mark Kettenis Date: Wed, 8 Sep 2004 14:31:15 +0000 (+0000) Subject: * solib-sunos.c (sunos_relocate_main_executable): Remove function. X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=eeefdaa78f7bdf4c215f5176ea92c94c4a2cc41e;p=binutils-gdb.git * solib-sunos.c (sunos_relocate_main_executable): Remove function. (sunos_solib_create_inferior_hook): Don't call sunos_relocate_main_executable. --- diff --git a/gdb/ChangeLog b/gdb/ChangeLog index d80553c8467..8245044fbec 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,5 +1,9 @@ 2004-09-08 Mark Kettenis + * solib-sunos.c (sunos_relocate_main_executable): Remove function. + (sunos_solib_create_inferior_hook): Don't call + sunos_relocate_main_executable. + * sparcnbsd-tdep.c (sparc32nbsd_elf_init_abi): Set solib_svr4_fetch_link_map_offsets to svr4_ilp32_fetch_link_map_offsets. diff --git a/gdb/solib-sunos.c b/gdb/solib-sunos.c index a88e7b735e8..872c8acd1e4 100644 --- a/gdb/solib-sunos.c +++ b/gdb/solib-sunos.c @@ -643,112 +643,6 @@ sunos_special_symbol_handling (void) } } -/* Relocate the main executable. This function should be called upon - stopping the inferior process at the entry point to the program. - The entry point from BFD is compared to the PC and if they are - different, the main executable is relocated by the proper amount. - - As written it will only attempt to relocate executables which - lack interpreter sections. It seems likely that only dynamic - linker executables will get relocated, though it should work - properly for a position-independent static executable as well. */ - -static void -sunos_relocate_main_executable (void) -{ - asection *interp_sect; - CORE_ADDR pc = read_pc (); - - /* Decide if the objfile needs to be relocated. As indicated above, - we will only be here when execution is stopped at the beginning - of the program. Relocation is necessary if the address at which - we are presently stopped differs from the start address stored in - the executable AND there's no interpreter section. The condition - regarding the interpreter section is very important because if - there *is* an interpreter section, execution will begin there - instead. When there is an interpreter section, the start address - is (presumably) used by the interpreter at some point to start - execution of the program. - - If there is an interpreter, it is normal for it to be set to an - arbitrary address at the outset. The job of finding it is - handled in enable_break(). - - So, to summarize, relocations are necessary when there is no - interpreter section and the start address obtained from the - executable is different from the address at which GDB is - currently stopped. - - [ The astute reader will note that we also test to make sure that - the executable in question has the DYNAMIC flag set. It is my - opinion that this test is unnecessary (undesirable even). It - was added to avoid inadvertent relocation of an executable - whose e_type member in the ELF header is not ET_DYN. There may - be a time in the future when it is desirable to do relocations - on other types of files as well in which case this condition - should either be removed or modified to accomodate the new file - type. (E.g, an ET_EXEC executable which has been built to be - position-independent could safely be relocated by the OS if - desired. It is true that this violates the ABI, but the ABI - has been known to be bent from time to time.) - Kevin, Nov 2000. ] - */ - - interp_sect = bfd_get_section_by_name (exec_bfd, ".interp"); - if (interp_sect == NULL - && (bfd_get_file_flags (exec_bfd) & DYNAMIC) != 0 - && bfd_get_start_address (exec_bfd) != pc) - { - struct cleanup *old_chain; - struct section_offsets *new_offsets; - int i, changed; - CORE_ADDR displacement; - - /* It is necessary to relocate the objfile. The amount to - relocate by is simply the address at which we are stopped - minus the starting address from the executable. - - We relocate all of the sections by the same amount. This - behavior is mandated by recent editions of the System V ABI. - According to the System V Application Binary Interface, - Edition 4.1, page 5-5: - - ... Though the system chooses virtual addresses for - individual processes, it maintains the segments' relative - positions. Because position-independent code uses relative - addressesing between segments, the difference between - virtual addresses in memory must match the difference - between virtual addresses in the file. The difference - between the virtual address of any segment in memory and - the corresponding virtual address in the file is thus a - single constant value for any one executable or shared - object in a given process. This difference is the base - address. One use of the base address is to relocate the - memory image of the program during dynamic linking. - - The same language also appears in Edition 4.0 of the System V - ABI and is left unspecified in some of the earlier editions. */ - - displacement = pc - bfd_get_start_address (exec_bfd); - changed = 0; - - new_offsets = xcalloc (symfile_objfile->num_sections, - sizeof (struct section_offsets)); - old_chain = make_cleanup (xfree, new_offsets); - - for (i = 0; i < symfile_objfile->num_sections; i++) - { - if (displacement != ANOFFSET (symfile_objfile->section_offsets, i)) - changed = 1; - new_offsets->offsets[i] = displacement; - } - - if (changed) - objfile_relocate (symfile_objfile, new_offsets); - - do_cleanups (old_chain); - } -} - /* GLOBAL FUNCTION @@ -804,9 +698,6 @@ sunos_relocate_main_executable (void) static void sunos_solib_create_inferior_hook (void) { - /* Relocate the main executable if necessary. */ - sunos_relocate_main_executable (); - if ((debug_base = locate_base ()) == 0) { /* Can't find the symbol or the executable is statically linked. */