diff options
| author | Roland McGrath <roland@hack.frob.com> | 2015-06-17 11:29:47 -0700 |
|---|---|---|
| committer | Roland McGrath <roland@hack.frob.com> | 2015-06-18 12:51:37 -0700 |
| commit | ae9ef4d35e21370a5bc7d281fa85a5cec250b8c0 (patch) | |
| tree | 24b27d4d6a9e645b4238a604073879aae3f3a9f1 | |
| parent | d1ac55d89023f86a34e46e9f064746334014ae28 (diff) | |
| download | glibc-roland/nacl-debug-hack.tar.gz glibc-roland/nacl-debug-hack.tar.xz glibc-roland/nacl-debug-hack.zip | |
| -rw-r--r-- | elf/dl-debug.c | 3 | ||||
| -rw-r--r-- | sysdeps/nacl/dl-sysdep.c | 27 | ||||
| -rw-r--r-- | sysdeps/nacl/glob.c | 4 | ||||
| -rw-r--r-- | sysdeps/nacl/ldsodefs.h | 7 |
4 files changed, 39 insertions, 2 deletions
diff --git a/elf/dl-debug.c b/elf/dl-debug.c index e32a5a64e4..b89ea4d5d8 100644 --- a/elf/dl-debug.c +++ b/elf/dl-debug.c @@ -72,5 +72,8 @@ _dl_debug_initialize (ElfW(Addr) ldbase, Lmid_t ns) void _dl_debug_state (void) { +#ifdef DL_DEBUG_STATE + DL_DEBUG_STATE; +#endif } rtld_hidden_def (_dl_debug_state) 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 diff --git a/sysdeps/nacl/glob.c b/sysdeps/nacl/glob.c index 36d62e807d..eda6e9e110 100644 --- a/sysdeps/nacl/glob.c +++ b/sysdeps/nacl/glob.c @@ -16,11 +16,11 @@ License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ -#include <unistd.h> /* Declares getlogin_r. */ +#include <unistd.h> /* Declares __getlogin_r. */ /* We do not have getlogin_r in the library at all for NaCl. Define it away so the glob code does not try to use it. */ -#define getlogin_r(name, len) (ENOSYS) +#define __getlogin_r(name, len) (ENOSYS) /* Fetch the version that defines glob64 as an alias. */ #include <sysdeps/wordsize-64/glob.c> diff --git a/sysdeps/nacl/ldsodefs.h b/sysdeps/nacl/ldsodefs.h index 383ced5612..d8c1552e67 100644 --- a/sysdeps/nacl/ldsodefs.h +++ b/sysdeps/nacl/ldsodefs.h @@ -32,4 +32,11 @@ extern void _dl_aux_init (ElfW(auxv_t) *av) internal_function; /* Initialization which is normally done by the dynamic linker. */ extern void _dl_non_dynamic_init (void) internal_function; +#ifdef SHARED +extern void (*__nacl_extra_r_brk) (void) attribute_hidden; +# define DL_DEBUG_STATE \ + if (__nacl_extra_r_brk != NULL) \ + (*__nacl_extra_r_brk) (); +#endif + #endif /* ldsodefs.h */ |