commit 6e8dcacd0840b3c38e7ec664bb9adbccc2108fdd
author Richard Henderson <richard.henderson@linaro.org> Mon Dec 27 07:01:24 2021 -0800
committer Laurent Vivier <laurent@vivier.eu> Thu Jan 06 11:40:52 2022 +0100
tree a2e419cce74e240a769a931b23a2ed9878177357
parent 220717a6f46a99031a5b1af964bbf4dec1310440

linux-user: Add code for PR_GET/SET_UNALIGN

This requires extra work for each target, but adds the
common syscall code, and the necessary flag in CPUState.

Reviewed-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20211227150127.2659293-4-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

linux-user/syscall.c

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index d868ef2..b511289 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -6378,6 +6378,12 @@
 #ifndef do_prctl_get_tagged_addr_ctrl
 #define do_prctl_get_tagged_addr_ctrl do_prctl_inval0
 #endif
+#ifndef do_prctl_get_unalign
+#define do_prctl_get_unalign do_prctl_inval1
+#endif
+#ifndef do_prctl_set_unalign
+#define do_prctl_set_unalign do_prctl_inval1
+#endif
 
 static abi_long do_prctl(CPUArchState *env, abi_long option, abi_long arg2,
                          abi_long arg3, abi_long arg4, abi_long arg5)
@@ -6441,6 +6447,11 @@
         }
         return do_prctl_get_tagged_addr_ctrl(env);
 
+    case PR_GET_UNALIGN:
+        return do_prctl_get_unalign(env, arg2);
+    case PR_SET_UNALIGN:
+        return do_prctl_set_unalign(env, arg2);
+
     case PR_GET_DUMPABLE:
     case PR_SET_DUMPABLE:
     case PR_GET_KEEPCAPS:
@@ -6483,8 +6494,6 @@
     case PR_SET_THP_DISABLE:
     case PR_GET_TSC:
     case PR_SET_TSC:
-    case PR_GET_UNALIGN:
-    case PR_SET_UNALIGN:
         /* Disable to prevent the target disabling stuff we need. */
         return -TARGET_EINVAL;