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* [glibc/release/2.35/master] Linux: Remove DL_FIND_ARG_COMPONENTS
@ 2022-05-17 9:57 Florian Weimer
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From: Florian Weimer @ 2022-05-17 9:57 UTC (permalink / raw)
To: glibc-cvs
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=29f833f5abe03f89cc830e362474b389545aa139
commit 29f833f5abe03f89cc830e362474b389545aa139
Author: Florian Weimer <fweimer@redhat.com>
Date: Thu Feb 3 10:58:59 2022 +0100
Linux: Remove DL_FIND_ARG_COMPONENTS
The generic definition is always used since the Native Client
port has been removed.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
(cherry picked from commit 2d47fa68628e831a692cba8fc9050cef435afc5e)
Diff:
---
sysdeps/unix/sysv/linux/dl-sysdep.c | 25 ++++++++++---------------
1 file changed, 10 insertions(+), 15 deletions(-)
diff --git a/sysdeps/unix/sysv/linux/dl-sysdep.c b/sysdeps/unix/sysv/linux/dl-sysdep.c
index 72aa109f2f..a13e0ea7ad 100644
--- a/sysdeps/unix/sysv/linux/dl-sysdep.c
+++ b/sysdeps/unix/sysv/linux/dl-sysdep.c
@@ -59,19 +59,6 @@ void *__libc_stack_end attribute_relro = NULL;
rtld_hidden_data_def(__libc_stack_end)
void *_dl_random attribute_relro = NULL;
-#ifndef DL_FIND_ARG_COMPONENTS
-# define DL_FIND_ARG_COMPONENTS(cookie, argc, argv, envp, auxp) \
- do { \
- void **_tmp; \
- (argc) = *(long int *) cookie; \
- (argv) = (char **) ((long int *) cookie + 1); \
- (envp) = (argv) + (argc) + 1; \
- for (_tmp = (void **) (envp); *_tmp; ++_tmp) \
- continue; \
- (auxp) = (void *) ++_tmp; \
- } while (0)
-#endif
-
#ifndef DL_STACK_END
# define DL_STACK_END(cookie) ((void *) (cookie))
#endif
@@ -90,8 +77,16 @@ _dl_sysdep_start (void **start_argptr,
#endif
__libc_stack_end = DL_STACK_END (start_argptr);
- DL_FIND_ARG_COMPONENTS (start_argptr, _dl_argc, _dl_argv, _environ,
- GLRO(dl_auxv));
+ _dl_argc = (intptr_t) *start_argptr;
+ _dl_argv = (char **) (start_argptr + 1); /* Necessary aliasing violation. */
+ _environ = _dl_argv + _dl_argc + 1;
+ for (char **tmp = _environ + 1; ; ++tmp)
+ if (*tmp == NULL)
+ {
+ /* Another necessary aliasing violation. */
+ GLRO(dl_auxv) = (ElfW(auxv_t) *) (tmp + 1);
+ break;
+ }
user_entry = (ElfW(Addr)) ENTRY_POINT;
GLRO(dl_platform) = NULL; /* Default to nothing known about the platform. */
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