diff options
| author | H.J. Lu <hjl.tools@gmail.com> | 2017-11-13 08:02:39 -0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2017-11-13 08:02:52 -0800 |
| commit | 4a306ef1c8ff1cac292c2fd56a3b91d7bfdecefc (patch) | |
| tree | 48c4360f23ee98ce4355b932ba66b4c1226de0a7 | |
| parent | e69897bf202e18034cbef26f363bae64de70a196 (diff) | |
| download | glibc-4a306ef1c8ff1cac292c2fd56a3b91d7bfdecefc.tar.gz | |
ld.so: Add architecture specific fields
To support Intel Control-flow Enforcement Technology (CET) run-time
control:
1. An architecture specific field in the writable ld.so namespace is
needed to indicate if CET features are enabled at run-time.
2. An architecture specific field in struct link_map is needed if
CET features are enabled in an ELF module.
This patch adds dl-procruntime.c to the writable ld.so namespace and
link_map.h to struct link_map.
Tested with build-many-glibcs.py.
* elf/dl-support.c: Include <dl-procruntime.c>.
* include/link.h: Include <link_map.h>.
* sysdeps/generic/dl-procruntime.c: New file.
* sysdeps/generic/link_map.h: Likewise.
* sysdeps/generic/ldsodefs.h: Include <dl-procruntime.c> in
the writable ld.so namespace.
| -rw-r--r-- | ChangeLog | 9 | ||||
| -rw-r--r-- | elf/dl-support.c | 1 | ||||
| -rw-r--r-- | include/link.h | 2 | ||||
| -rw-r--r-- | sysdeps/generic/dl-procruntime.c | 1 | ||||
| -rw-r--r-- | sysdeps/generic/ldsodefs.h | 11 | ||||
| -rw-r--r-- | sysdeps/generic/link_map.h | 1 |
6 files changed, 21 insertions, 4 deletions
@@ -1,3 +1,12 @@ +2017-11-13 H.J. Lu <hongjiu.lu@intel.com> + + * elf/dl-support.c: Include <dl-procruntime.c>. + * include/link.h: Include <link_map.h>. + * sysdeps/generic/dl-procruntime.c: New file. + * sysdeps/generic/link_map.h: Likewise. + * sysdeps/generic/ldsodefs.h: Include <dl-procruntime.c> in + the writable ld.so namespace. + 2017-11-12 Paul Eggert <eggert@cs.ucla.edu> timezone: pacify GCC -Wstringop-truncation diff --git a/elf/dl-support.c b/elf/dl-support.c index 5e3de90598..235d3a7f46 100644 --- a/elf/dl-support.c +++ b/elf/dl-support.c @@ -126,6 +126,7 @@ int _dl_starting_up = 1; void *_dl_random; /* Get architecture specific initializer. */ +#include <dl-procruntime.c> #include <dl-procinfo.c> /* Initial value of the CPU clock. */ diff --git a/include/link.h b/include/link.h index 3e1b2aefb7..82b77a6b41 100644 --- a/include/link.h +++ b/include/link.h @@ -203,6 +203,8 @@ struct link_map freed, ie. not allocated with the dummy malloc in ld.so. */ +#include <link_map.h> + /* Collected information about own RPATH directories. */ struct r_search_path_struct l_rpath_dirs; diff --git a/sysdeps/generic/dl-procruntime.c b/sysdeps/generic/dl-procruntime.c new file mode 100644 index 0000000000..a056184690 --- /dev/null +++ b/sysdeps/generic/dl-procruntime.c @@ -0,0 +1 @@ +/* No architecture specific definitions. */ diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h index 5efae2d96d..52a792a597 100644 --- a/sysdeps/generic/ldsodefs.h +++ b/sysdeps/generic/ldsodefs.h @@ -373,6 +373,13 @@ struct rtld_global EXTERN void (*_dl_rtld_unlock_recursive) (void *); #endif + /* Get architecture specific definitions. */ +#define PROCINFO_DECL +#ifndef PROCINFO_CLASS +# define PROCINFO_CLASS EXTERN +#endif +#include <dl-procruntime.c> + /* 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. */ @@ -529,10 +536,6 @@ struct rtld_global_ro #endif /* Get architecture specific definitions. */ -#define PROCINFO_DECL -#ifndef PROCINFO_CLASS -# define PROCINFO_CLASS EXTERN -#endif #include <dl-procinfo.c> /* Names of shared object for which the RPATH should be ignored. */ diff --git a/sysdeps/generic/link_map.h b/sysdeps/generic/link_map.h new file mode 100644 index 0000000000..a056184690 --- /dev/null +++ b/sysdeps/generic/link_map.h @@ -0,0 +1 @@ +/* No architecture specific definitions. */ |