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* [glibc/arm/morello/main] cheri: elf: make l_entry a capability
@ 2022-10-12 14:16 Szabolcs Nagy
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From: Szabolcs Nagy @ 2022-10-12 14:16 UTC (permalink / raw)
To: glibc-cvs
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=a3085f72f8b450631ca0d9f8fe80482f079295ef
commit a3085f72f8b450631ca0d9f8fe80482f079295ef
Author: Szabolcs Nagy <szabolcs.nagy@arm.com>
Date: Tue Sep 6 08:40:52 2022 +0100
cheri: elf: make l_entry a capability
Previously the entry address was fixed up to be a capability before
using it so l_entry could be ElfW(Addr), but the code is simpler and
more consistent if l_entry is a capability throughout:
The AT_ENTRY auxv entry is specified to be a capability and a number
if internal l_entry usage is simpler if it is elfptr_t.
Diff:
---
elf/rtld.c | 6 +++---
include/link.h | 2 +-
sysdeps/generic/ldsodefs.h | 4 ++--
sysdeps/unix/sysv/linux/dl-sysdep.c | 6 +++---
4 files changed, 9 insertions(+), 9 deletions(-)
diff --git a/elf/rtld.c b/elf/rtld.c
index f419dcc95c..3a1f32ea7c 100644
--- a/elf/rtld.c
+++ b/elf/rtld.c
@@ -384,7 +384,7 @@ extern struct rtld_global_ro _rtld_local_ro
static void dl_main (const ElfW(Phdr) *phdr, ElfW(Word) phnum,
- ElfW(Addr) *user_entry, ElfW(auxv_t) *auxv);
+ elfptr_t *user_entry, ElfW(auxv_t) *auxv);
/* These two variables cannot be moved into .data.rel.ro. */
static struct libname_list _dl_rtld_libname;
@@ -453,7 +453,7 @@ static elfptr_t __attribute__ ((noinline))
_dl_start_final (void *arg, struct dl_start_final_info *info)
#endif
{
- ElfW(Addr) start_addr;
+ elfptr_t start_addr;
/* Do not use an initializer for these members because it would
intefere with __rtld_static_init. */
@@ -1357,7 +1357,7 @@ _dl_start_args_adjust (int skip_args)
static void
dl_main (const ElfW(Phdr) *phdr,
ElfW(Word) phnum,
- ElfW(Addr) *user_entry,
+ elfptr_t *user_entry,
ElfW(auxv_t) *auxv)
{
struct link_map *main_map;
diff --git a/include/link.h b/include/link.h
index e70d3b2d75..6dd8e712c4 100644
--- a/include/link.h
+++ b/include/link.h
@@ -134,7 +134,7 @@ struct link_map
ElfW(Dyn) *l_info[DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGNUM
+ DT_EXTRANUM + DT_VALNUM + DT_ADDRNUM];
const ElfW(Phdr) *l_phdr; /* Pointer to program header table in core. */
- ElfW(Addr) l_entry; /* Entry point location. */
+ elfptr_t l_entry; /* Entry point location. */
ElfW(Half) l_phnum; /* Number of program header entries. */
ElfW(Half) l_ldnum; /* Number of dynamic segment entries. */
diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h
index 050a3032de..d3fdf9f4e0 100644
--- a/sysdeps/generic/ldsodefs.h
+++ b/sysdeps/generic/ldsodefs.h
@@ -1131,10 +1131,10 @@ extern void *_dl_sysdep_read_whole_file (const char *file, size_t *sizep,
After this, file access calls and getenv must work. This is responsible
for setting __libc_enable_secure if we need to be secure (e.g. setuid),
and for setting _dl_argc and _dl_argv, and then calling _dl_main. */
-extern ElfW(Addr) _dl_sysdep_start (void **start_argptr,
+extern elfptr_t _dl_sysdep_start (void **start_argptr,
void (*dl_main) (const ElfW(Phdr) *phdr,
ElfW(Word) phnum,
- ElfW(Addr) *user_entry,
+ elfptr_t *user_entry,
ElfW(auxv_t) *auxv))
attribute_hidden;
diff --git a/sysdeps/unix/sysv/linux/dl-sysdep.c b/sysdeps/unix/sysv/linux/dl-sysdep.c
index 9e15c5bf69..b77d7fbb0e 100644
--- a/sysdeps/unix/sysv/linux/dl-sysdep.c
+++ b/sysdeps/unix/sysv/linux/dl-sysdep.c
@@ -67,7 +67,7 @@ struct dl_main_arguments
{
const ElfW(Phdr) *phdr;
ElfW(Word) phnum;
- ElfW(Addr) user_entry;
+ elfptr_t user_entry;
};
/* Separate function, so that dl_main can be called without the large
@@ -95,10 +95,10 @@ _dl_sysdep_parse_arguments (void **start_argptr,
args->user_entry = auxv_values[AT_ENTRY];
}
-ElfW(Addr)
+elfptr_t
_dl_sysdep_start (void **start_argptr,
void (*dl_main) (const ElfW(Phdr) *phdr, ElfW(Word) phnum,
- ElfW(Addr) *user_entry, ElfW(auxv_t) *auxv))
+ elfptr_t *user_entry, ElfW(auxv_t) *auxv))
{
__libc_stack_end = DL_STACK_END (start_argptr);
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