From: Paul Floyd <pjfloyd@wanadoo.fr>
Date: Wed, 13 Apr 2022 22:01:49 +0000 (+0200)
Subject: Some more auxv extensions for FreeBSD 14
X-Git-Tag: VALGRIND_3_20_0~103
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d6bcd3ba2906e9ed2c5240af5479fce80ec12658;p=thirdparty%2Fvalgrind.git

Some more auxv extensions for FreeBSD 14

New entries added to testcase and documented in initimg.
May need more work
---

diff --git a/coregrind/m_initimg/initimg-freebsd.c b/coregrind/m_initimg/initimg-freebsd.c
index 10d034eab6..bfa1907769 100644
--- a/coregrind/m_initimg/initimg-freebsd.c
+++ b/coregrind/m_initimg/initimg-freebsd.c
@@ -690,12 +690,17 @@ Addr setup_client_stack( void*  init_sp,
       case AT_ARGC:
       // case AT_ARGV:
       case AT_ENVC:
-         // case AT_ENVV:
-         // case AT_PS_STRINGS:
+      // case AT_ENVV:
+      // case AT_PS_STRINGS:
 #endif
 
 #if (FREEBSD_VERS >= FREEBSD_14)
-         // case AT_FXRNG:
+      // I think that this is a pointer to a "fenestrasX" structture
+      // lots of stuff that I don't understand
+      // arc4random, passing through VDSO page ...
+      // case AT_FXRNG:
+      // Again a pointer, to the VDSO base for use by rtld
+      // case AT_KPRELOAD:
 #endif
 
       case AT_PHDR:
diff --git a/none/tests/freebsd/auxv.c b/none/tests/freebsd/auxv.c
index 689fb3d113..ce13b6e131 100644
--- a/none/tests/freebsd/auxv.c
+++ b/none/tests/freebsd/auxv.c
@@ -50,7 +50,9 @@ Elf_AuxStr aux_map[AT_COUNT] = {
 #endif
 #if (FREEBSD_VERS >= FREEBSD_14)
         {"AT_FXRNG", 33},
-//        {"AT_COUNT", 34},
+        {"AT_KPRELOAD", 34},
+
+//        {"AT_COUNT", 35},
 #endif
 };