linux-kernel - [PATCH v2 2/6] elf: lose is closely tied to _dl_map_object_from

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Message-Id: <f6788964bf6412da6fcdd3be4f67eb0417e558a6.1606319495.git.szabolcs.nagy@arm.com>
Date:   Fri, 27 Nov 2020 13:20:10 +0000
From:   Szabolcs Nagy <szabolcs.nagy@....com>
To:     libc-alpha@...rceware.org
Cc:     Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, linux-kernel@...r.kernel.org,
        Jeremy Linton <jeremy.linton@....com>,
        Mark Brown <broonie@...nel.org>,
        kernel-hardening@...ts.openwall.com,
        Topi Miettinen <toiwoton@...il.com>,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v2 2/6] elf: lose is closely tied to _dl_map_object_from_fd

Simple refactoring to keep failure handling next to
_dl_map_object_from_fd.
---
 elf/dl-load.c | 48 ++++++++++++++++++++++++------------------------
 1 file changed, 24 insertions(+), 24 deletions(-)

diff --git a/elf/dl-load.c b/elf/dl-load.c
index f3201e7c14..21e55deb19 100644
--- a/elf/dl-load.c
+++ b/elf/dl-load.c
@@ -835,30 +835,6 @@ _dl_init_paths (const char *llp, const char *source)
 }
 
 
-static void
-__attribute__ ((noreturn, noinline))
-lose (int code, int fd, const char *name, char *realname, struct link_map *l,
-      const char *msg, struct r_debug *r, Lmid_t nsid)
-{
-  /* The file might already be closed.  */
-  if (fd != -1)
-    (void) __close_nocancel (fd);
-  if (l != NULL && l->l_origin != (char *) -1l)
-    free ((char *) l->l_origin);
-  free (l);
-  free (realname);
-
-  if (r != NULL)
-    {
-      r->r_state = RT_CONSISTENT;
-      _dl_debug_state ();
-      LIBC_PROBE (map_failed, 2, nsid, r);
-    }
-
-  _dl_signal_error (code, name, NULL, msg);
-}
-
-
 /* Process PT_GNU_PROPERTY program header PH in module L after
    PT_LOAD segments are mapped.  Only one NT_GNU_PROPERTY_TYPE_0
    note is handled which contains processor specific properties.  */
@@ -930,6 +906,30 @@ _dl_process_pt_gnu_property (struct link_map *l, const ElfW(Phdr) *ph)
 }
 
 
+static void
+__attribute__ ((noreturn, noinline))
+lose (int code, int fd, const char *name, char *realname, struct link_map *l,
+      const char *msg, struct r_debug *r, Lmid_t nsid)
+{
+  /* The file might already be closed.  */
+  if (fd != -1)
+    (void) __close_nocancel (fd);
+  if (l != NULL && l->l_origin != (char *) -1l)
+    free ((char *) l->l_origin);
+  free (l);
+  free (realname);
+
+  if (r != NULL)
+    {
+      r->r_state = RT_CONSISTENT;
+      _dl_debug_state ();
+      LIBC_PROBE (map_failed, 2, nsid, r);
+    }
+
+  _dl_signal_error (code, name, NULL, msg);
+}
+
+
 /* Map in the shared object NAME, actually located in REALNAME, and already
    opened on FD.  */
 
-- 
2.17.1