Initial version

1 files changed, 31 insertions, 0 deletions

diff --git a/src/ldso/aarch64/tlsdesc.s b/src/ldso/aarch64/tlsdesc.s
new file mode 100644
index 0000000..c6c685b
--- /dev/null
+++ b/src/ldso/aarch64/tlsdesc.s
@@ -0,0 +1,31 @@
+// size_t __tlsdesc_static(size_t *a)
+// {
+// 	return a[1];
+// }
+.global __tlsdesc_static
+.hidden __tlsdesc_static
+.type __tlsdesc_static,@function
+__tlsdesc_static:
+	ldr x0,[x0,#8]
+	ret
+
+// size_t __tlsdesc_dynamic(size_t *a)
+// {
+// 	struct {size_t modidx,off;} *p = (void*)a[1];
+// 	size_t *dtv = *(size_t**)(tp - 8);
+// 	return dtv[p->modidx] + p->off - tp;
+// }
+.global __tlsdesc_dynamic
+.hidden __tlsdesc_dynamic
+.type __tlsdesc_dynamic,@function
+__tlsdesc_dynamic:
+	stp x1,x2,[sp,#-16]!
+	mrs x1,tpidr_el0      // tp
+	ldr x0,[x0,#8]        // p
+	ldp x0,x2,[x0]        // p->modidx, p->off
+	sub x2,x2,x1          // p->off - tp
+	ldr x1,[x1,#-8]       // dtv
+	ldr x1,[x1,x0,lsl #3] // dtv[p->modidx]
+	add x0,x1,x2          // dtv[p->modidx] + p->off - tp
+	ldp x1,x2,[sp],#16
+	ret