From: Elliott Hughes <enh@google.com>
Date: Wed, 6 Apr 2016 21:41:36 +0000 (-0700)
Subject: Improve decoding of Android's PR_SET_VMA prctl
X-Git-Tag: v4.12~444
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=612368b59e7517a34ff23a319329962b6a25c88c;p=strace

Improve decoding of Android's PR_SET_VMA prctl

Before:

  prctl(0x53564d41 /* PR_??? */, 0, 0x7f8ab53000, 4096,
        "atexit handlers") = 0

After:

  prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, 0x7fa8cbd000, 4096,
        "atexit handlers") = 0

* prctl.c (SYS_FUNC(prctl)) [__ANDROID__]: Do not define PR_SET_VMA.
* Hard-code PR_SET_VMA_ANON_NAME, the only current sub-option.
* xlat/prctl_options.in: Add PR_SET_VMA.
---

diff --git a/prctl.c b/prctl.c
index 53ee56e3..da7d265b 100644
--- a/prctl.c
+++ b/prctl.c
@@ -208,16 +208,12 @@ SYS_FUNC(prctl)
 		return RVAL_DECODED;
 
 #ifdef __ANDROID__
-# ifndef PR_SET_VMA
-#  define PR_SET_VMA   0x53564d41
-# endif
 # ifndef PR_SET_VMA_ANON_NAME
 #  define PR_SET_VMA_ANON_NAME    0
 # endif
 	case PR_SET_VMA:
 		if (tcp->u_arg[1] == PR_SET_VMA_ANON_NAME) {
-			tprintf(", %lu", tcp->u_arg[1]);
-			tprintf(", %#lx", tcp->u_arg[2]);
+			tprintf(", PR_SET_VMA_ANON_NAME, %#lx", tcp->u_arg[2]);
 			tprintf(", %lu, ", tcp->u_arg[3]);
 			printstr(tcp, tcp->u_arg[4], -1);
 		} else {
diff --git a/xlat/prctl_options.in b/xlat/prctl_options.in
index 2d0d287f..8c09ee31 100644
--- a/xlat/prctl_options.in
+++ b/xlat/prctl_options.in
@@ -44,3 +44,4 @@ PR_MPX_DISABLE_MANAGEMENT 44
 PR_SET_FP_MODE 45
 PR_GET_FP_MODE 46
 PR_CAP_AMBIENT 47
+PR_SET_VMA 0x53564d41