Mercurial > hg > CbC > CbC_gcc

comparison gcc/config/rs6000/darwin-tramp.asm @ 0:a06113de4d67

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
first commit
author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
parents
children
comparison
equal deleted inserted replaced
-1:000000000000 0:a06113de4d67
1 /* Special support for trampolines
2 *
3 * Copyright (C) 1996, 1997, 2000, 2004, 2005, 2009 Free Software Foundation, Inc.
4 * Written By Michael Meissner
5 *
6 * This file is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 3, or (at your option) any
9 * later version.
10 *
11 * This file is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * Under Section 7 of GPL version 3, you are granted additional
17 * permissions described in the GCC Runtime Library Exception, version
18 * 3.1, as published by the Free Software Foundation.
19 *
20 * You should have received a copy of the GNU General Public License and
21 * a copy of the GCC Runtime Library Exception along with this program;
22 * see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 * <http://www.gnu.org/licenses/>.
24 */
25
26 #include "darwin-asm.h"
27
28 /* Set up trampolines. */
29
30 .text
31 .align LOG2_GPR_BYTES
32 Ltrampoline_initial:
33 mflr r0
34 bl 1f
35 Lfunc = .-Ltrampoline_initial
36 .g_long 0 /* will be replaced with function address */
37 Lchain = .-Ltrampoline_initial
38 .g_long 0 /* will be replaced with static chain */
39 1: mflr r11
40 lg r12,0(r11) /* function address */
41 mtlr r0
42 mtctr r12
43 lg r11,GPR_BYTES(r11) /* static chain */
44 bctr
45
46 trampoline_size = .-Ltrampoline_initial
47
48 /* R3 = stack address to store trampoline */
49 /* R4 = length of trampoline area */
50 /* R5 = function address */
51 /* R6 = static chain */
52
53 .globl ___trampoline_setup
54 ___trampoline_setup:
55 mflr r0 /* save return address */
56 bcl 20,31,LCF0 /* load up __trampoline_initial into r7 */
57 LCF0:
58 mflr r11
59 addis r7,r11,ha16(LTRAMP-LCF0)
60 lg r7,lo16(LTRAMP-LCF0)(r7)
61 subi r7,r7,4
62 li r8,trampoline_size /* verify trampoline big enough */
63 cmpg cr1,r8,r4
64 srwi r4,r4,2 /* # words to move (insns always 4-byte) */
65 addi r9,r3,-4 /* adjust pointer for lgu */
66 mtctr r4
67 blt cr1,Labort
68
69 mtlr r0
70
71 /* Copy the instructions to the stack */
72 Lmove:
73 lwzu r10,4(r7)
74 stwu r10,4(r9)
75 bdnz Lmove
76
77 /* Store correct function and static chain */
78 stg r5,Lfunc(r3)
79 stg r6,Lchain(r3)
80
81 /* Now flush both caches */
82 mtctr r4
83 Lcache:
84 icbi 0,r3
85 dcbf 0,r3
86 addi r3,r3,4
87 bdnz Lcache
88
89 /* Ensure cache-flushing has finished. */
90 sync
91 isync
92
93 /* Make stack writeable. */
94 b ___enable_execute_stack
95
96 Labort:
97 #ifdef __DYNAMIC__
98 bl L_abort$stub
99 .data
100 .section __TEXT,__picsymbolstub1,symbol_stubs,pure_instructions,32
101 .align 2
102 L_abort$stub:
103 .indirect_symbol _abort
104 mflr r0
105 bcl 20,31,L0$_abort
106 L0$_abort:
107 mflr r11
108 addis r11,r11,ha16(L_abort$lazy_ptr-L0$_abort)
109 mtlr r0
110 lgu r12,lo16(L_abort$lazy_ptr-L0$_abort)(r11)
111 mtctr r12
112 bctr
113 .data
114 .lazy_symbol_pointer
115 L_abort$lazy_ptr:
116 .indirect_symbol _abort
117 .g_long dyld_stub_binding_helper
118 #else
119 bl _abort
120 #endif
121 .data
122 .align LOG2_GPR_BYTES
123 LTRAMP:
124 .g_long Ltrampoline_initial
125