1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
// rb_ia64_flushrs and rb_ia64_bsp is written in IA64 assembly language
// because Intel Compiler for IA64 doesn't support inline assembly.
//
// This file is based on following C program compiled by gcc.
//
// void rb_ia64_flushrs(void) { __builtin_ia64_flushrs(); }
// void *rb_ia64_bsp(void) { return __builtin_ia64_bsp(); }
//
// Note that rb_ia64_flushrs and rb_ia64_bsp works in its own stack frame.
// It's because BSP is updated by br.call/brl.call (not alloc instruction).
// So rb_ia64_flushrs flushes stack frames including caller's one.
// rb_ia64_bsp returns the address next to caller's register stack frame.
//
// See also
// Intel Itanium Architecture Software Developer's Manual
// Volume 2: System Architecture.
//
.file "ia64.c"
.text
.align 16
.global rb_ia64_flushrs#
.proc rb_ia64_flushrs#
rb_ia64_flushrs:
.prologue
.body
flushrs
;;
nop.i 0
br.ret.sptk.many b0
.endp rb_ia64_flushrs#
.align 16
.global rb_ia64_bsp#
.proc rb_ia64_bsp#
rb_ia64_bsp:
.prologue
.body
nop.m 0
;;
mov r8 = ar.bsp
br.ret.sptk.many b0
.endp rb_ia64_bsp#
.ident "GCC: (GNU) 3.3.5 (Debian 1:3.3.5-13)"
|
