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-rw-r--r--src/thread/x86_64/__set_thread_area.s15
-rw-r--r--src/thread/x86_64/__unmapself.s24
-rw-r--r--src/thread/x86_64/clone.s22
3 files changed, 61 insertions, 0 deletions
diff --git a/src/thread/x86_64/__set_thread_area.s b/src/thread/x86_64/__set_thread_area.s
new file mode 100644
index 00000000..ed35b7a8
--- /dev/null
+++ b/src/thread/x86_64/__set_thread_area.s
@@ -0,0 +1,15 @@
+/* Copyright 2011 Nicholas J. Kain, licensed GNU LGPL 2.1 or later */
+.text
+.global __set_thread_area
+.type __set_thread_area,%function
+__set_thread_area:
+ push %rbx /* save x86_64 abi clobbered registers */
+ push %r11
+ mov %rdi,%rsi /* shift for syscall */
+ movl $0x1002,%edi /* SET_FS register */
+ movl $158,%eax /* set fs segment to */
+ syscall /* arch_prctl(SET_FS, arg)*/
+ pop %r11 /* restore clobbered registers */
+ pop %rbx
+ ret
+.size __set_thread_area,.-__set_thread_area
diff --git a/src/thread/x86_64/__unmapself.s b/src/thread/x86_64/__unmapself.s
new file mode 100644
index 00000000..59092eaa
--- /dev/null
+++ b/src/thread/x86_64/__unmapself.s
@@ -0,0 +1,24 @@
+/* Copyright 2011 Nicholas J. Kain, licensed GNU LGPL 2.1 or later */
+.text
+.global __unmapself
+.type __unmapself,%function
+__unmapself:
+ call 1f /* glibc ABI compat */
+ .long -1
+ .long -1
+1: push %rsi /* save arg2 for munmap */
+ push %rdx /* save arg3 for munmap */
+ mov %rdi,%rsi /* rt_sigprocmask() args: move arg1 to rsi */
+ xor %rdi,%rdi
+ xor %rdx,%rdx
+ movq $8,%r10
+ movl $14,%eax /* __NR_rt_sigprocmask */
+ syscall /* call rt_sigprocmask(0,arg1,0,8) */
+ pop %rsi /* munmap() args: reload from stack */
+ pop %rdi
+ movl $11,%eax /* __NR_munmap */
+ syscall /* munmap(arg2,arg3) */
+ xor %rdi,%rdi /* exit() args: always return success */
+ movl $60,%eax /* __NR_exit */
+ syscall /* exit(0) */
+.size __unmapself,.-__unmapself
diff --git a/src/thread/x86_64/clone.s b/src/thread/x86_64/clone.s
new file mode 100644
index 00000000..51410051
--- /dev/null
+++ b/src/thread/x86_64/clone.s
@@ -0,0 +1,22 @@
+/* Copyright 2011 Nicholas J. Kain, licensed GNU LGPL 2.1 or later */
+.text
+.global __uniclone
+.type __uniclone,%function
+/* rdi = child_stack, rsi = start, rdx = pthread_struct */
+__uniclone:
+ subq $16,%rdi /* grow child_stack */
+ mov %rsi,8(%rdi) /* push start onto child_stack as return ptr */
+ mov %rdx,0(%rdi) /* push pthread_struct onto child_stack */
+ mov %rdx,%r8 /* r8 = tls */
+ mov %rdi,%rsi /* rsi = child_stack */
+ leaq 40(%rdx),%r10 /* r10 = child_id */
+ movl $56,%eax /* clone syscall number */
+ movl $0x7d0f00,%edi /* rdi = flags */
+ mov %r10,%rdx /* rdx = parent_id */
+ syscall /* clone(flags, child_stack, parent_id,
+ * child_id, tls) */
+ test %rax,%rax
+ jnz 1f /* if we're in the parent -> goto 1f */
+ pop %rdi /* restore pthread_struct from child stack */
+1: ret
+.size __uniclone,.-__uniclone