diff options
Diffstat (limited to 'sysdeps/nacl/dl-sysdep.c')
| -rw-r--r-- | sysdeps/nacl/dl-sysdep.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/sysdeps/nacl/dl-sysdep.c b/sysdeps/nacl/dl-sysdep.c index 3e902c2cae..82d122ff97 100644 --- a/sysdeps/nacl/dl-sysdep.c +++ b/sysdeps/nacl/dl-sysdep.c @@ -44,6 +44,33 @@ # define DL_STACK_END(cookie) (((void **) (cookie))[1]) +# define DL_PLATFORM_AUXV \ + case AT_SYSINFO_EHDR: handle_sysinfo_ehdr ((void *) av->a_un.a_val); + +void (*__nacl_extra_r_brk) (void) attribute_hidden; + +static void +handle_sysinfo_ehdr (const void *loader_ehdr) +{ + const ElfW(Ehdr) *ehdr = loader_ehdr; + const ElfW(Phdr) *phdr = loader_ehdr + ehdr->e_phoff; + for (uint_fast16_t i = 0; i < ehdr->e_phnum; ++i) + if (phdr[i].p_type == PT_DYNAMIC) + { + ElfW(Dyn) *end = (void *) (phdr[i].p_vaddr + phdr[i].p_memsz); + for (ElfW(Dyn) *d = (void *) phdr[i].p_vaddr; d < end; ++d) + if (d->d_tag == DT_DEBUG) + { + const struct r_debug *r = (void *) d->d_un.d_ptr; + if (r != NULL) + __nacl_extra_r_brk = (void (*) (void)) r->r_brk; + d->d_un.d_ptr = (ElfW(Addr)) &_r_debug; + break; + } + break; + } +} + /* This is called from the entry point (_start), defined by the RTLD_START macro in the machine-specific dl-machine.h file. At this point, dynamic linking has been completed and the first argument is the application's |