[glibc/fw/glibc-hwcaps] elf: Do not pass GLRO(dl_platform), GLRO(dl_platformlen) to _dl_important_hwcaps

[glibc/fw/glibc-hwcaps] elf: Do not pass GLRO(dl_platform), GLRO(dl_platformlen) to _dl_important_hwcaps

[Florian Weimer]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=f3dc341aa2bf93f8fbe2ec6172ccbf1084361379

commit f3dc341aa2bf93f8fbe2ec6172ccbf1084361379
Author: Florian Weimer <fweimer@redhat.com>
Date:   Wed Jun 10 10:35:22 2020 +0200

    elf: Do not pass GLRO(dl_platform), GLRO(dl_platformlen) to _dl_important_hwcaps
    
    In the current code, the function can easily obtain the information
    on its own.

Diff:
---
 elf/dl-hwcaps.c            | 11 +++++------
 elf/dl-load.c              |  3 +--
 sysdeps/generic/ldsodefs.h | 12 ++++++------
 3 files changed, 12 insertions(+), 14 deletions(-)

diff --git a/elf/dl-hwcaps.c b/elf/dl-hwcaps.c
index 6df9efb255..44dbac099f 100644
--- a/elf/dl-hwcaps.c
+++ b/elf/dl-hwcaps.c
@@ -28,13 +28,12 @@
 
 /* Return an array of useful/necessary hardware capability names.  */
 const struct r_strlenpair *
-_dl_important_hwcaps (const char *platform, size_t platform_len, size_t *sz,
-		      size_t *max_capstrlen)
+_dl_important_hwcaps (size_t *sz, size_t *max_capstrlen)
 {
   uint64_t hwcap_mask = GET_HWCAP_MASK();
   /* Determine how many important bits are set.  */
   uint64_t masked = GLRO(dl_hwcap) & hwcap_mask;
-  size_t cnt = platform != NULL;
+  size_t cnt = GLRO (dl_platform) != NULL;
   size_t n, m;
   size_t total;
   struct r_strlenpair *result;
@@ -60,10 +59,10 @@ _dl_important_hwcaps (const char *platform, size_t platform_len, size_t *sz,
 	masked ^= 1ULL << n;
 	++m;
       }
-  if (platform != NULL)
+  if (GLRO (dl_platform) != NULL)
     {
-      temp[m].str = platform;
-      temp[m].len = platform_len;
+      temp[m].str = GLRO (dl_platform);
+      temp[m].len = GLRO (dl_platformlen);
       ++m;
     }
 
diff --git a/elf/dl-load.c b/elf/dl-load.c
index 0c8fa72c4d..f3201e7c14 100644
--- a/elf/dl-load.c
+++ b/elf/dl-load.c
@@ -697,8 +697,7 @@ _dl_init_paths (const char *llp, const char *source)
 
 #ifdef SHARED
   /* Get the capabilities.  */
-  capstr = _dl_important_hwcaps (GLRO(dl_platform), GLRO(dl_platformlen),
-				 &ncapstr, &max_capstrlen);
+  capstr = _dl_important_hwcaps (&ncapstr, &max_capstrlen);
 #endif
 
   /* First set up the rest of the default search directory entries.  */
diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h
index 510a2f6841..382eeb9be0 100644
--- a/sysdeps/generic/ldsodefs.h
+++ b/sysdeps/generic/ldsodefs.h
@@ -1071,12 +1071,12 @@ extern void _dl_show_auxv (void) attribute_hidden;
    other.  */
 extern char *_dl_next_ld_env_entry (char ***position) attribute_hidden;
 
-/* Return an array with the names of the important hardware capabilities.  */
-extern const struct r_strlenpair *_dl_important_hwcaps (const char *platform,
-							size_t paltform_len,
-							size_t *sz,
-							size_t *max_capstrlen)
-     attribute_hidden;
+/* Return an array with the names of the important hardware
+   capabilities.  The length of the array is written to *SZ, and the
+   maximum of all strings length is written to *MAX_CAPSTRLEN.  */
+const struct r_strlenpair *_dl_important_hwcaps (size_t *sz,
+						 size_t *max_capstrlen)
+  attribute_hidden;
 
 /* Look up NAME in ld.so.cache and return the file name stored there,
    or null if none is found.  Caller must free returned string.  */