* sysdeps/generic/ldsodefs.h (rtld_global): Reorder some elements
to fill in holes (rtld_global_ro): Likewise. 2007-06-18 Jakub Jelinek <jakub@redhat.com> * elf/dl-addr.c (_dl_addr): Skip PT_LOAD checking if l_contiguous. Move PT_LOAD checking to... (_dl_addr_inside_object): ... here, new function. * elf/dl-sym.c (do_sym): If not l_contiguous, call _dl_addr_inside_object. * elf/dl-iteratephdr.c (__dl_iterate_phdr): Likewise. * dlfcn/dlinfo.c (dlinfo_doit): Likewise. * elf/dl-open.c (dl_open_worker): Likewise. (_dl_addr_inside_object): New function if IS_IN_rtld. * elf/dl-load.c (_dl_map_object_from_fd): Set l_contiguous if no holes are present or are PROT_NONE protected. * include/link.h (struct link_map): Add l_contiguous field. * sysdeps/generic/ldsodefs.h (_dl_addr_inside_object): New prototype.
This commit is contained in:
Ulrich Drepper
parent
ae1ad3aebb
commit
9be09e060f
22
ChangeLog
22
ChangeLog
|
|
@ -1,3 +1,25 @@
|
|||
2007-06-19 Ulrich Drepper <drepper@redhat.com>
|
||||
|
||||
* sysdeps/generic/ldsodefs.h (rtld_global): Reorder some elements
|
||||
to fill in holes
|
||||
(rtld_global_ro): Likewise.
|
||||
|
||||
2007-06-18 Jakub Jelinek <jakub@redhat.com>
|
||||
|
||||
* elf/dl-addr.c (_dl_addr): Skip PT_LOAD checking if l_contiguous.
|
||||
Move PT_LOAD checking to...
|
||||
(_dl_addr_inside_object): ... here, new function.
|
||||
* elf/dl-sym.c (do_sym): If not l_contiguous,
|
||||
call _dl_addr_inside_object.
|
||||
* elf/dl-iteratephdr.c (__dl_iterate_phdr): Likewise.
|
||||
* dlfcn/dlinfo.c (dlinfo_doit): Likewise.
|
||||
* elf/dl-open.c (dl_open_worker): Likewise.
|
||||
(_dl_addr_inside_object): New function if IS_IN_rtld.
|
||||
* elf/dl-load.c (_dl_map_object_from_fd): Set l_contiguous if no
|
||||
holes are present or are PROT_NONE protected.
|
||||
* include/link.h (struct link_map): Add l_contiguous field.
|
||||
* sysdeps/generic/ldsodefs.h (_dl_addr_inside_object): New prototype.
|
||||
|
||||
2007-06-18 Jakub Jelinek <jakub@redhat.com>
|
||||
Tomas Janousek <tjanouse@redhat.com>
|
||||
Ulrich Drepper <drepper@redhat.com>
|
||||
|
|
|
|||
|
|
@ -1,5 +1,5 @@
|
|||
/* dlinfo -- Get information from the dynamic linker.
|
||||
Copyright (C) 2003, 2004, 2006 Free Software Foundation, Inc.
|
||||
Copyright (C) 2003, 2004, 2006, 2007 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
|
||||
The GNU C Library is free software; you can redistribute it and/or
|
||||
|
|
@ -56,9 +56,8 @@ dlinfo_doit (void *argsblock)
|
|||
/* Find the highest-addressed object that CALLER is not below. */
|
||||
for (nsid = 0; nsid < DL_NNS; ++nsid)
|
||||
for (l = GL(dl_ns)[nsid]._ns_loaded; l != NULL; l = l->l_next)
|
||||
if (caller >= l->l_map_start && caller < l->l_map_end)
|
||||
/* There must be exactly one DSO for the range of the virtual
|
||||
memory. Otherwise something is really broken. */
|
||||
if (caller >= l->l_map_start && caller < l->l_map_end
|
||||
&& (l->l_contiguous || _dl_addr_inside_object (l, caller)))
|
||||
break;
|
||||
|
||||
if (l == NULL)
|
||||
|
|
|
|||
|
|
@ -134,22 +134,12 @@ _dl_addr (const void *address, Dl_info *info,
|
|||
/* Find the highest-addressed object that ADDRESS is not below. */
|
||||
for (Lmid_t ns = 0; ns < DL_NNS; ++ns)
|
||||
for (struct link_map *l = GL(dl_ns)[ns]._ns_loaded; l; l = l->l_next)
|
||||
if (addr >= l->l_map_start && addr < l->l_map_end)
|
||||
if (addr >= l->l_map_start && addr < l->l_map_end
|
||||
&& (l->l_contiguous || _dl_addr_inside_object (l, addr)))
|
||||
{
|
||||
/* Make sure it lies within one of L's segments. */
|
||||
int n = l->l_phnum;
|
||||
const ElfW(Addr) reladdr = addr - l->l_addr;
|
||||
while (--n >= 0)
|
||||
if (l->l_phdr[n].p_type == PT_LOAD)
|
||||
{
|
||||
if (reladdr - l->l_phdr[n].p_vaddr >= 0
|
||||
&& reladdr - l->l_phdr[n].p_vaddr < l->l_phdr[n].p_memsz)
|
||||
{
|
||||
determine_info (addr, l, info, mapp, symbolp);
|
||||
result = 1;
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
determine_info (addr, l, info, mapp, symbolp);
|
||||
result = 1;
|
||||
goto out;
|
||||
}
|
||||
|
||||
out:
|
||||
|
|
@ -158,3 +148,19 @@ _dl_addr (const void *address, Dl_info *info,
|
|||
return result;
|
||||
}
|
||||
libc_hidden_def (_dl_addr)
|
||||
|
||||
/* Return non-zero if ADDR lies within one of L's segments. */
|
||||
int
|
||||
internal_function
|
||||
_dl_addr_inside_object (struct link_map *l, const ElfW(Addr) addr)
|
||||
{
|
||||
int n = l->l_phnum;
|
||||
const ElfW(Addr) reladdr = addr - l->l_addr;
|
||||
|
||||
while (--n >= 0)
|
||||
if (l->l_phdr[n].p_type == PT_LOAD
|
||||
&& reladdr - l->l_phdr[n].p_vaddr >= 0
|
||||
&& reladdr - l->l_phdr[n].p_vaddr < l->l_phdr[n].p_memsz)
|
||||
return 1;
|
||||
return 0;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,5 +1,5 @@
|
|||
/* Get loaded objects program headers.
|
||||
Copyright (C) 2001,2002,2003,2004,2006 Free Software Foundation, Inc.
|
||||
Copyright (C) 2001,2002,2003,2004,2006,2007 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
Contributed by Jakub Jelinek <jakub@redhat.com>, 2001.
|
||||
|
||||
|
|
@ -54,9 +54,9 @@ __dl_iterate_phdr (int (*callback) (struct dl_phdr_info *info,
|
|||
nloaded += GL(dl_ns)[cnt]._ns_nloaded;
|
||||
|
||||
if (caller >= (const void *) l->l_map_start
|
||||
&& caller < (const void *) l->l_map_end)
|
||||
/* There must be exactly one DSO for the range of the virtual
|
||||
memory. Otherwise something is really broken. */
|
||||
&& caller < (const void *) l->l_map_end
|
||||
&& (l->l_contiguous
|
||||
|| _dl_addr_inside_object (l, (ElfW(Addr)) caller)))
|
||||
ns = cnt;
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -1,5 +1,5 @@
|
|||
/* Map in a shared object's segments from the file.
|
||||
Copyright (C) 1995-2005, 2006 Free Software Foundation, Inc.
|
||||
Copyright (C) 1995-2005, 2006, 2007 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
|
||||
The GNU C Library is free software; you can redistribute it and/or
|
||||
|
|
@ -1223,6 +1223,8 @@ cannot allocate TLS data structures for initial thread");
|
|||
loadcmds[nloadcmds - 1].mapstart - c->mapend,
|
||||
PROT_NONE);
|
||||
|
||||
l->l_contiguous = 1;
|
||||
|
||||
goto postmap;
|
||||
}
|
||||
|
||||
|
|
@ -1242,6 +1244,7 @@ cannot allocate TLS data structures for initial thread");
|
|||
/* Remember which part of the address space this object uses. */
|
||||
l->l_map_start = c->mapstart + l->l_addr;
|
||||
l->l_map_end = l->l_map_start + maplength;
|
||||
l->l_contiguous = !has_holes;
|
||||
|
||||
while (c < &loadcmds[nloadcmds])
|
||||
{
|
||||
|
|
|
|||
|
|
@ -201,10 +201,10 @@ dl_open_worker (void *a)
|
|||
for (Lmid_t ns = 0; ns < DL_NNS; ++ns)
|
||||
for (l = GL(dl_ns)[ns]._ns_loaded; l != NULL; l = l->l_next)
|
||||
if (caller_dlopen >= (const void *) l->l_map_start
|
||||
&& caller_dlopen < (const void *) l->l_map_end)
|
||||
&& caller_dlopen < (const void *) l->l_map_end
|
||||
&& (l->l_contiguous
|
||||
|| _dl_addr_inside_object (l, (ElfW(Addr)) caller_dlopen)))
|
||||
{
|
||||
/* There must be exactly one DSO for the range of the virtual
|
||||
memory. Otherwise something is really broken. */
|
||||
assert (ns == l->l_ns);
|
||||
call_map = l;
|
||||
goto found_caller;
|
||||
|
|
@ -662,3 +662,21 @@ show_scope (struct link_map *new)
|
|||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef IS_IN_rtld
|
||||
/* Return non-zero if ADDR lies within one of L's segments. */
|
||||
int
|
||||
internal_function
|
||||
_dl_addr_inside_object (struct link_map *l, const ElfW(Addr) addr)
|
||||
{
|
||||
int n = l->l_phnum;
|
||||
const ElfW(Addr) reladdr = addr - l->l_addr;
|
||||
|
||||
while (--n >= 0)
|
||||
if (l->l_phdr[n].p_type == PT_LOAD
|
||||
&& reladdr - l->l_phdr[n].p_vaddr >= 0
|
||||
&& reladdr - l->l_phdr[n].p_vaddr < l->l_phdr[n].p_memsz)
|
||||
return 1;
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -98,10 +98,9 @@ do_sym (void *handle, const char *name, void *who,
|
|||
for (Lmid_t ns = 0; ns < DL_NNS; ++ns)
|
||||
for (struct link_map *l = GL(dl_ns)[ns]._ns_loaded; l != NULL;
|
||||
l = l->l_next)
|
||||
if (caller >= l->l_map_start && caller < l->l_map_end)
|
||||
if (caller >= l->l_map_start && caller < l->l_map_end
|
||||
&& (l->l_contiguous || _dl_addr_inside_object (l, caller)))
|
||||
{
|
||||
/* There must be exactly one DSO for the range of the virtual
|
||||
memory. Otherwise something is really broken. */
|
||||
match = l;
|
||||
break;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -187,6 +187,9 @@ struct link_map
|
|||
is interested in the PLT interception.*/
|
||||
unsigned int l_removed:1; /* Nozero if the object cannot be used anymore
|
||||
since it is removed. */
|
||||
unsigned int l_contiguous:1; /* Nonzero if inter-segment holes are
|
||||
mprotected or if no holes are present at
|
||||
all. */
|
||||
|
||||
/* Collected information about own RPATH directories. */
|
||||
struct r_search_path_struct l_rpath_dirs;
|
||||
|
|
|
|||
|
|
@ -439,18 +439,18 @@ struct rtld_global
|
|||
EXTERN void (*_dl_rtld_unlock_recursive) (void *);
|
||||
#endif
|
||||
|
||||
/* Prevailing state of the stack, PF_X indicating it's executable. */
|
||||
EXTERN ElfW(Word) _dl_stack_flags;
|
||||
|
||||
/* If loading a shared object requires that we make the stack executable
|
||||
when it was not, we do it by calling this function.
|
||||
It returns an errno code or zero on success. */
|
||||
EXTERN int (*_dl_make_stack_executable_hook) (void **) internal_function;
|
||||
|
||||
/* Highest dtv index currently needed. */
|
||||
EXTERN size_t _dl_tls_max_dtv_idx;
|
||||
/* Prevailing state of the stack, PF_X indicating it's executable. */
|
||||
EXTERN ElfW(Word) _dl_stack_flags;
|
||||
|
||||
/* Flag signalling whether there are gaps in the module ID allocation. */
|
||||
EXTERN bool _dl_tls_dtv_gaps;
|
||||
/* Highest dtv index currently needed. */
|
||||
EXTERN size_t _dl_tls_max_dtv_idx;
|
||||
/* Information about the dtv slots. */
|
||||
EXTERN struct dtv_slotinfo_list
|
||||
{
|
||||
|
|
@ -534,15 +534,15 @@ struct rtld_global_ro
|
|||
#define DL_DEBUG_HELP (1 << 9)
|
||||
#define DL_DEBUG_PRELINK (1 << 10)
|
||||
|
||||
/* Cached value of `getpagesize ()'. */
|
||||
EXTERN size_t _dl_pagesize;
|
||||
|
||||
/* OS version. */
|
||||
EXTERN unsigned int _dl_osversion;
|
||||
/* Platform name. */
|
||||
EXTERN const char *_dl_platform;
|
||||
EXTERN size_t _dl_platformlen;
|
||||
|
||||
/* Cached value of `getpagesize ()'. */
|
||||
EXTERN size_t _dl_pagesize;
|
||||
|
||||
/* Copy of the content of `_dl_main_searchlist' at startup time. */
|
||||
EXTERN struct r_scope_elem _dl_initial_searchlist;
|
||||
|
||||
|
|
@ -571,9 +571,6 @@ struct rtld_global_ro
|
|||
/* Expected cache ID. */
|
||||
EXTERN int _dl_correct_cache_id;
|
||||
|
||||
/* 0 if internal pointer values should not be guarded, 1 if they should. */
|
||||
EXTERN int _dl_pointer_guard;
|
||||
|
||||
/* Mask for hardware capabilities that are available. */
|
||||
EXTERN uint64_t _dl_hwcap;
|
||||
|
||||
|
|
@ -657,6 +654,9 @@ struct rtld_global_ro
|
|||
/* List of auditing interfaces. */
|
||||
struct audit_ifaces *_dl_audit;
|
||||
unsigned int _dl_naudit;
|
||||
|
||||
/* 0 if internal pointer values should not be guarded, 1 if they should. */
|
||||
EXTERN int _dl_pointer_guard;
|
||||
};
|
||||
# define __rtld_global_attribute__
|
||||
# ifdef IS_IN_rtld
|
||||
|
|
@ -1061,6 +1061,8 @@ extern struct link_map *_dl_update_slotinfo (unsigned long int req_modid);
|
|||
but never touch anything. Return null if it's not allocated yet. */
|
||||
extern void *_dl_tls_get_addr_soft (struct link_map *l) internal_function;
|
||||
|
||||
extern int _dl_addr_inside_object (struct link_map *l, const ElfW(Addr) addr)
|
||||
internal_function attribute_hidden;
|
||||
|
||||
__END_DECLS
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue