From: Sukadev Bhattiprolu <sukadev@xxxxxxxxxxxxxxxxxx>
Subject: [v13][PATCH 09/12] Implement sys_eclone for x86_64
Implement sys_eclone() system call for x86_64.
This is based on earlier code from Dave Hansen. Modified to share code
between x86 and x86_64 kernels.
Signed-off-by: Sukadev Bhattiprolu <sukadev@xxxxxxxxxxxxxxxxxx>
---
arch/x86/include/asm/unistd_64.h | 3 +++
arch/x86/kernel/entry_64.S | 1 +
arch/x86/kernel/process_64.c | 7 +++++++
3 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/arch/x86/include/asm/unistd_64.h b/arch/x86/include/asm/unistd_64.h
index 8d3ad0a..d2ffc89 100644
--- a/arch/x86/include/asm/unistd_64.h
+++ b/arch/x86/include/asm/unistd_64.h
@@ -661,6 +661,9 @@ __SYSCALL(__NR_pwritev, sys_pwritev)
__SYSCALL(__NR_rt_tgsigqueueinfo, sys_rt_tgsigqueueinfo)
#define __NR_perf_event_open 298
__SYSCALL(__NR_perf_event_open, sys_perf_event_open)
+#define __NR_eclone 299
+__SYSCALL(__NR_eclone, stub_eclone)
+
#ifndef __NO_STUBS
#define __ARCH_WANT_OLD_READDIR
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index b5c061f..6d60cd1 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -698,6 +698,7 @@ END(\label)
PTREGSCALL stub_vfork, sys_vfork, %rdi
PTREGSCALL stub_sigaltstack, sys_sigaltstack, %rdx
PTREGSCALL stub_iopl, sys_iopl, %rsi
+ PTREGSCALL stub_eclone, sys_eclone, %r8
ENTRY(ptregscall_common)
DEFAULT_FRAME 1 8 /* offset 8: return address */
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index eb62cbc..2c306b9 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -540,6 +540,13 @@ sys_clone(unsigned long clone_flags, unsigned long newsp,
return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
}
+asmlinkage long
+sys_eclone(unsigned int flags_low, struct clone_args * __user uca,
+ int args_size, pid_t * __user pids, struct pt_regs *regs)
+{
+ return do_eclone_common(regs, flags_low, uca, args_size, pids);
+}
+
unsigned long get_wchan(struct task_struct *p)
{
unsigned long stack;
--
1.6.0.4
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