diff options
Diffstat (limited to 'elf')
| -rw-r--r-- | elf/Makefile | 2 | ||||
| -rw-r--r-- | elf/dl-open.c | 2 | ||||
| -rw-r--r-- | elf/dl-support.c | 37 |
3 files changed, 38 insertions, 3 deletions
diff --git a/elf/Makefile b/elf/Makefile index a19a8b42ba..cf9eaa8cb4 100644 --- a/elf/Makefile +++ b/elf/Makefile @@ -69,8 +69,6 @@ $(objpfx)dl-allobjs.so: $(rtld-routines:%=$(objpfx)%.so) $(reloc-link) $^ # Link together the dynamic linker into a single relocatable object. -# We use this to produce both the ABI-compliant and Linux-compatible -# dynamic linker shared objects below. $(objpfx)librtld.so: $(objpfx)dl-allobjs.so $(common-objpfx)libc_pic.a $(reloc-link) '-Wl,-(' $^ -lgcc '-Wl,-)' diff --git a/elf/dl-open.c b/elf/dl-open.c index 021c4bea74..9dda31e761 100644 --- a/elf/dl-open.c +++ b/elf/dl-open.c @@ -97,7 +97,7 @@ _dl_open (const char *file, int mode) else { if (_dl_global_scope_alloc < - _dl_global_scope_end - _dl_global_scope + 2) + (size_t) (_dl_global_scope_end - _dl_global_scope + 2)) { /* Must extend the list. */ struct link_map **new = realloc (_dl_global_scope, diff --git a/elf/dl-support.c b/elf/dl-support.c index 50ebfbfe5a..03c9d9c5c7 100644 --- a/elf/dl-support.c +++ b/elf/dl-support.c @@ -20,6 +20,8 @@ Cambridge, MA 02139, USA. */ #include <assert.h> #include <fcntl.h> #include <unistd.h> +#include <sys/mman.h> +#include <sys/stat.h> /* This file defines some things that for the dynamic linker are defined in rtld.c and dl-sysdep.c in ways appropriate to bootstrap dynamic linking. */ @@ -46,3 +48,38 @@ _dl_sysdep_fatal (void) { assert (! "_dl_sysdep_fatal called"); } + +/* Read the whole contents of FILE into new mmap'd space with given + protections. *SIZEP gets the size of the file. */ + +void * +_dl_sysdep_read_whole_file (const char *file, size_t *sizep, int prot) +{ + void *result; + struct stat st; + int fd = __open (file, O_RDONLY); + if (fd < 0) + return NULL; + if (__fstat (fd, &st) < 0) + result = NULL; + else + { + /* Map a copy of the file contents. */ + result = __mmap (0, st.st_size, prot, +#ifdef MAP_COPY + MAP_COPY +#else + MAP_PRIVATE +#endif +#ifdef MAP_FILE + | MAP_FILE +#endif + , fd, 0); + if (result == (void *) -1) + result = NULL; + else + *sizep = st.st_size; + } + __close (fd); + return result; +} |