From: Dmitry V. Levin <ldv@altlinux.org>
Date: Mon, 28 Nov 2016 19:46:50 +0000 (+0000)
Subject: aarch64, arm, sparc: add comments on fault injection support in kernel
X-Git-Tag: v4.15~69
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=7b3b12b79310fea1ec55d6bda7d2c0f2ce3c1baa;p=strace

aarch64, arm, sparc: add comments on fault injection support in kernel

* linux/aarch64/set_scno.c: Note the kernel commit that introduced
NT_ARM_SYSTEM_CALL support.
* linux/arm/set_scno.c: Note the kernel commit that introduced
PTRACE_SET_SYSCALL support.
* linux/sparc/set_scno.c: Note the kernel commit that introduced
reloading from the syscall number register.
---

diff --git a/linux/aarch64/set_scno.c b/linux/aarch64/set_scno.c
index 70e0a172..24498d50 100644
--- a/linux/aarch64/set_scno.c
+++ b/linux/aarch64/set_scno.c
@@ -1,6 +1,10 @@
 #ifndef NT_ARM_SYSTEM_CALL
 # define NT_ARM_SYSTEM_CALL 0x404
 #endif
+/*
+ * NT_ARM_SYSTEM_CALL regset is supported by linux kernel
+ * starting with commit v3.19-rc1~59^2~16.
+ */
 
 static int
 arch_set_scno(struct tcb *tcp, long scno)
diff --git a/linux/arm/set_scno.c b/linux/arm/set_scno.c
index f99a7fbf..928f1e92 100644
--- a/linux/arm/set_scno.c
+++ b/linux/arm/set_scno.c
@@ -1,6 +1,10 @@
 #ifndef PTRACE_SET_SYSCALL
 # define PTRACE_SET_SYSCALL 23
 #endif
+/*
+ * PTRACE_SET_SYSCALL is supported by linux kernel
+ * starting with commit v2.6.16-rc1~107^2
+ */
 
 static int
 arch_set_scno(struct tcb *tcp, long scno)
diff --git a/linux/sparc/set_scno.c b/linux/sparc/set_scno.c
index 0f8c4ace..bba124a8 100644
--- a/linux/sparc/set_scno.c
+++ b/linux/sparc/set_scno.c
@@ -1,3 +1,8 @@
+/*
+ * Reloading the syscall number from %g1 register is supported
+ * by linux kernel starting with commit v4.5-rc7~35^2~3.
+ */
+
 static int
 arch_set_scno(struct tcb *tcp, long scno)
 {