diff options
Diffstat (limited to 'elf')
| -rw-r--r-- | elf/rtld.c | 193 |
1 files changed, 98 insertions, 95 deletions
diff --git a/elf/rtld.c b/elf/rtld.c index 44fbf3e53a..e74da5438c 100644 --- a/elf/rtld.c +++ b/elf/rtld.c @@ -146,6 +146,104 @@ RTLD_START # error "sysdeps/MACHINE/dl-machine.h fails to define RTLD_START" #endif +#ifndef VALIDX +# define VALIDX(tag) (DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGNUM \ + + DT_EXTRANUM + DT_VALTAGIDX (tag)) +#endif +#ifndef ADDRIDX +# define ADDRIDX(tag) (DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGNUM \ + + DT_EXTRANUM + DT_VALNUM + DT_ADDRTAGIDX (tag)) +#endif + +/* This is the second half of _dl_start (below). It can be inlined safely + under DONT_USE_BOOTSTRAP_MAP, where it is careful not to make any GOT + references. When the tools don't permit us to avoid using a GOT entry + for _dl_rtld_global (no attribute_hidden support), we must make sure + this function is not inlined (see below). */ + +#ifdef DONT_USE_BOOTSTRAP_MAP +static inline ElfW(Addr) __attribute__ ((always_inline)) +_dl_start_final (void *arg) +#else +static ElfW(Addr) __attribute__ ((noinline)) +_dl_start_final (void *arg, struct link_map *bootstrap_map_p) +#endif +{ + ElfW(Addr) start_addr; + extern char _begin[] attribute_hidden; + extern char _end[] attribute_hidden; + + if (HP_TIMING_AVAIL) + { + /* If it hasn't happen yet record the startup time. */ + if (! HP_TIMING_INLINE) + HP_TIMING_NOW (start_time); + + /* Initialize the timing functions. */ + HP_TIMING_DIFF_INIT (); + } + + /* Transfer data about ourselves to the permanent link_map structure. */ +#ifndef DONT_USE_BOOTSTRAP_MAP + GL(dl_rtld_map).l_addr = bootstrap_map_p->l_addr; + GL(dl_rtld_map).l_ld = bootstrap_map_p->l_ld; + memcpy (GL(dl_rtld_map).l_info, bootstrap_map_p->l_info, + sizeof GL(dl_rtld_map).l_info); + GL(dl_rtld_map).l_mach = bootstrap_map_p->l_mach; +#endif + _dl_setup_hash (&GL(dl_rtld_map)); + GL(dl_rtld_map).l_opencount = 1; + GL(dl_rtld_map).l_map_start = (ElfW(Addr)) _begin; + GL(dl_rtld_map).l_map_end = (ElfW(Addr)) _end; + /* Copy the TLS related data if necessary. */ +#if USE_TLS && !defined DONT_USE_BOOTSTRAP_MAP +# ifdef HAVE___THREAD + assert (bootstrap_map_p->l_tls_modid != 0); +# else + if (bootstrap_map_p->l_tls_modid != 0) +# endif + { + GL(dl_rtld_map).l_tls_blocksize = bootstrap_map_p->l_tls_blocksize; + GL(dl_rtld_map).l_tls_align = bootstrap_map_p->l_tls_align; + GL(dl_rtld_map).l_tls_initimage_size + = bootstrap_map_p->l_tls_initimage_size; + GL(dl_rtld_map).l_tls_initimage = bootstrap_map_p->l_tls_initimage; + GL(dl_rtld_map).l_tls_offset = bootstrap_map_p->l_tls_offset; + GL(dl_rtld_map).l_tls_modid = 1; + GL(dl_rtld_map).l_tls_tp_initialized + = bootstrap_map_p->l_tls_tp_initialized; + } +#endif + +#if HP_TIMING_AVAIL + HP_TIMING_NOW (GL(dl_cpuclock_offset)); +#endif + + /* Call the OS-dependent function to set up life so we can do things like + file access. It will call `dl_main' (below) to do all the real work + of the dynamic linker, and then unwind our frame and run the user + entry point on the same stack we entered on. */ + start_addr = _dl_sysdep_start (arg, &dl_main); + +#ifndef HP_TIMING_NONAVAIL + if (HP_TIMING_AVAIL) + { + hp_timing_t end_time; + + /* Get the current time. */ + HP_TIMING_NOW (end_time); + + /* Compute the difference. */ + HP_TIMING_DIFF (rtld_total_time, start_time, end_time); + } +#endif + + if (__builtin_expect (GL(dl_debug_mask) & DL_DEBUG_STATISTICS, 0)) + print_statistics (); + + return start_addr; +} + static ElfW(Addr) __attribute_used__ internal_function _dl_start (void *arg) { @@ -343,101 +441,6 @@ _dl_start (void *arg) } -#ifndef VALIDX -# define VALIDX(tag) (DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGNUM \ - + DT_EXTRANUM + DT_VALTAGIDX (tag)) -#endif -#ifndef ADDRIDX -# define ADDRIDX(tag) (DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGNUM \ - + DT_EXTRANUM + DT_VALNUM + DT_ADDRTAGIDX (tag)) -#endif - -#ifdef DONT_USE_BOOTSTRAP_MAP -static ElfW(Addr) -_dl_start_final (void *arg) -#else -static ElfW(Addr) -_dl_start_final (void *arg, struct link_map *bootstrap_map_p) -#endif -{ - /* The use of `alloca' here looks ridiculous but it helps. The goal - is to avoid the function from being inlined. There is no official - way to do this so we use this trick. gcc never inlines functions - which use `alloca'. */ - ElfW(Addr) *start_addr = alloca (sizeof (ElfW(Addr))); - extern char _begin[] attribute_hidden; - extern char _end[] attribute_hidden; - - if (HP_TIMING_AVAIL) - { - /* If it hasn't happen yet record the startup time. */ - if (! HP_TIMING_INLINE) - HP_TIMING_NOW (start_time); - - /* Initialize the timing functions. */ - HP_TIMING_DIFF_INIT (); - } - - /* Transfer data about ourselves to the permanent link_map structure. */ -#ifndef DONT_USE_BOOTSTRAP_MAP - GL(dl_rtld_map).l_addr = bootstrap_map_p->l_addr; - GL(dl_rtld_map).l_ld = bootstrap_map_p->l_ld; - memcpy (GL(dl_rtld_map).l_info, bootstrap_map_p->l_info, - sizeof GL(dl_rtld_map).l_info); - GL(dl_rtld_map).l_mach = bootstrap_map_p->l_mach; -#endif - _dl_setup_hash (&GL(dl_rtld_map)); - GL(dl_rtld_map).l_opencount = 1; - GL(dl_rtld_map).l_map_start = (ElfW(Addr)) _begin; - GL(dl_rtld_map).l_map_end = (ElfW(Addr)) _end; - /* Copy the TLS related data if necessary. */ -#if USE_TLS && !defined DONT_USE_BOOTSTRAP_MAP -# ifdef HAVE___THREAD - assert (bootstrap_map_p->l_tls_modid != 0); -# else - if (bootstrap_map_p->l_tls_modid != 0) -# endif - { - GL(dl_rtld_map).l_tls_blocksize = bootstrap_map_p->l_tls_blocksize; - GL(dl_rtld_map).l_tls_align = bootstrap_map_p->l_tls_align; - GL(dl_rtld_map).l_tls_initimage_size - = bootstrap_map_p->l_tls_initimage_size; - GL(dl_rtld_map).l_tls_initimage = bootstrap_map_p->l_tls_initimage; - GL(dl_rtld_map).l_tls_offset = bootstrap_map_p->l_tls_offset; - GL(dl_rtld_map).l_tls_modid = 1; - GL(dl_rtld_map).l_tls_tp_initialized - = bootstrap_map_p->l_tls_tp_initialized; - } -#endif - -#if HP_TIMING_AVAIL - HP_TIMING_NOW (GL(dl_cpuclock_offset)); -#endif - - /* Call the OS-dependent function to set up life so we can do things like - file access. It will call `dl_main' (below) to do all the real work - of the dynamic linker, and then unwind our frame and run the user - entry point on the same stack we entered on. */ - *start_addr = _dl_sysdep_start (arg, &dl_main); - -#ifndef HP_TIMING_NONAVAIL - if (HP_TIMING_AVAIL) - { - hp_timing_t end_time; - - /* Get the current time. */ - HP_TIMING_NOW (end_time); - - /* Compute the difference. */ - HP_TIMING_DIFF (rtld_total_time, start_time, end_time); - } -#endif - - if (__builtin_expect (GL(dl_debug_mask) & DL_DEBUG_STATISTICS, 0)) - print_statistics (); - - return *start_addr; -} /* Now life is peachy; we can do all normal operations. On to the real work. */ |