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Add support for AT_RANDOM to keep glibc happy when it is built

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to assume kernel 2.6.29 or later. Closes #194429.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@10160
This commit is contained in:
Tom Hughes 2009-05-28 12:51:24 +00:00
parent 64dcb65ca5
commit cb02702334
1 changed files with 15 additions and 0 deletions
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15
coregrind/m_initimg/initimg-linux.c
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@ -248,6 +248,10 @@ static HChar** setup_client_env ( HChar** origenv, const HChar* toolname)
#define AT_UCACHEBSIZE 21
#endif /* AT_UCACHEBSIZE */
#ifndef AT_RANDOM
#define AT_RANDOM 25
#endif /* AT_RANDOM */
#ifndef AT_SYSINFO
#define AT_SYSINFO 32
#endif /* AT_SYSINFO */
@ -426,6 +430,8 @@ Addr setup_client_stack( void* init_sp,
for (cauxv = orig_auxv; cauxv->a_type != AT_NULL; cauxv++) {
if (cauxv->a_type == AT_PLATFORM)
stringsize += VG_(strlen)(cauxv->u.a_ptr) + 1;
else if (cauxv->a_type == AT_RANDOM)
stringsize += 16;
auxsize += sizeof(*cauxv);
}
@ -686,6 +692,15 @@ Addr setup_client_stack( void* init_sp,
auxv->a_type = AT_IGNORE;
break;
case AT_RANDOM:
/* points to 16 random bytes - we need to ensure this is
propagated to the client as glibc will assume it is
present if it is built for kernel 2.6.29 or later */
auxv->u.a_ptr = strtab;
VG_(memcpy)(strtab, orig_auxv->u.a_ptr, 16);
strtab += 16;
break;
default:
/* stomp out anything we don't know about */
VG_(debugLog)(2, "initimg",