commit 917e423073c5eacffbad83008c27c8e61e0e342a
Author: Mark Wielaard <mark@klomp.org>
Date:   Mon May 20 00:09:59 2019 +0200

    Make memcheck/tests/arm64-linux/scalar test work under root.
    
    Running the testsuite as root isn't really recommended.
    But lets not make tests fail unnecessarily when running as root.
    Pass really invalid arguments to setuid, setgid, acct and fchown.
    Make setresgid, setresuid, setregid and setreuid always succeed.

diff --git a/memcheck/tests/arm64-linux/scalar.c b/memcheck/tests/arm64-linux/scalar.c
index fd49db6..622ea1c 100644
--- a/memcheck/tests/arm64-linux/scalar.c
+++ b/memcheck/tests/arm64-linux/scalar.c
@@ -136,7 +136,7 @@ int main(void)
 
    // __NR_setuid 23
    GO(__NR_setuid, "1s 0m");
-   SY(__NR_setuid, x0); FAIL;
+   SY(__NR_setuid, x0-1); FAIL;
 
    // __NR_getuid 24
    GO(__NR_getuid, "0s 0m");
@@ -229,7 +229,7 @@ int main(void)
 
    // __NR_setgid 46
    GO(__NR_setgid, "1s 0m");
-   SY(__NR_setgid, x0); FAIL;
+   SY(__NR_setgid, x0-1); FAIL;
 
    // __NR_getgid 47
    GO(__NR_getgid, "0s 0m");
@@ -249,7 +249,7 @@ int main(void)
 
    // __NR_acct 51
    GO(__NR_acct, "1s 1m");
-   SY(__NR_acct, x0); FAIL;
+   SY(__NR_acct, x0-1); FAIL;
 
    // __NR_umount2 52
    GO(__NR_umount2, "2s 1m");
@@ -340,11 +340,11 @@ int main(void)
 
    // __NR_setreuid 70
    GO(__NR_setreuid, "2s 0m");
-   SY(__NR_setreuid, x0, x0); FAIL;
+   SY(__NR_setreuid, x0-1, x0-1); SUCC;
 
    // __NR_setregid 71
    GO(__NR_setregid, "2s 0m");
-   SY(__NR_setregid, x0, x0); FAIL;
+   SY(__NR_setregid, x0-1, x0-1); SUCC;
 
    // __NR_sigsuspend arm64 only has rt_sigsuspend
    // XXX: how do you use this function?
@@ -447,7 +447,7 @@ int main(void)
 
    // __NR_fchown 95
    GO(__NR_fchown, "3s 0m");
-   SY(__NR_fchown, x0, x0, x0); FAIL;
+   SY(__NR_fchown, x0-1, x0, x0); FAIL;
 
    // __NR_getpriority 96
    GO(__NR_getpriority, "2s 0m");
@@ -733,7 +733,7 @@ int main(void)
 
    // __NR_setresuid 164
    GO(__NR_setresuid, "3s 0m");
-   SY(__NR_setresuid, x0, x0, x0); FAIL;
+   SY(__NR_setresuid, x0-1, x0-1, x0-1); SUCC;
 
    // __NR_getresuid 165
    GO(__NR_getresuid, "3s 3m");
@@ -757,7 +757,7 @@ int main(void)
 
    // __NR_setresgid 170
    GO(__NR_setresgid, "3s 0m");
-   SY(__NR_setresgid, x0, x0, x0); FAIL;
+   SY(__NR_setresgid, x0-1, x0-1, x0-1); SUCC;
 
    // __NR_getresgid 171
    GO(__NR_getresgid, "3s 3m");