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cfc91acd | 1 | /* Startup code for programs linked with GNU libc. PowerPC64 version. |
d4697bc9 | 2 | Copyright (C) 1998-2014 Free Software Foundation, Inc. |
cfc91acd RM |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
92c6ccd1 RM |
10 | In addition to the permissions in the GNU Lesser General Public |
11 | License, the Free Software Foundation gives you unlimited | |
12 | permission to link the compiled version of this file with other | |
13 | programs, and to distribute those programs without any restriction | |
14 | coming from the use of this file. (The GNU Lesser General Public | |
15 | License restrictions do apply in other respects; for example, they | |
16 | cover modification of the file, and distribution when not linked | |
17 | into another program.) | |
18 | ||
19 | Note that people who make modified versions of this file are not | |
20 | obligated to grant this special exception for their modified | |
21 | versions; it is their choice whether to do so. The GNU Lesser | |
22 | General Public License gives permission to release a modified | |
23 | version without this exception; this exception also makes it | |
24 | possible to release a modified version which carries forward this | |
25 | exception. | |
26 | ||
cfc91acd RM |
27 | The GNU C Library is distributed in the hope that it will be useful, |
28 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
29 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
30 | Lesser General Public License for more details. | |
31 | ||
32 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
33 | License along with the GNU C Library; if not, see |
34 | <http://www.gnu.org/licenses/>. */ | |
cfc91acd RM |
35 | |
36 | #include <sysdep.h> | |
cfc91acd | 37 | |
b0f1246a AM |
38 | /* We do not want .eh_frame info for crt1.o since crt1.o is linked |
39 | before crtbegin.o, the file defining __EH_FRAME_BEGIN__. */ | |
40 | #undef cfi_startproc | |
41 | #define cfi_startproc | |
42 | #undef cfi_endproc | |
43 | #define cfi_endproc | |
44 | ||
cfc91acd | 45 | /* These are the various addresses we require. */ |
57a5ea02 | 46 | #ifdef PIC |
7fbf17e4 | 47 | .section ".data.rel.ro.local","aw" |
57a5ea02 | 48 | #else |
cfc91acd | 49 | .section ".rodata" |
57a5ea02 | 50 | #endif |
cfc91acd | 51 | .align 3 |
cfc91acd RM |
52 | L(start_addresses): |
53 | .quad 0 /* was _SDA_BASE_ but not in 64-bit ABI*/ | |
54 | /* function descriptors so don't need JUMPTARGET */ | |
2d67d91a | 55 | .quad main |
06b31ad3 RM |
56 | .quad __libc_csu_init |
57 | .quad __libc_csu_fini | |
cfc91acd RM |
58 | |
59 | ASM_SIZE_DIRECTIVE(L(start_addresses)) | |
60 | ||
61 | .section ".toc","aw" | |
62 | .L01: | |
63 | .tc L(start_addresses)[TC],L(start_addresses) | |
64 | .section ".text" | |
65 | ENTRY(_start) | |
66 | /* Save the stack pointer, in case we're statically linked under Linux. */ | |
67 | mr r9,r1 | |
68 | /* Set up an initial stack frame, and clear the LR. */ | |
69 | clrrdi r1,r1,4 | |
70 | li r0,0 | |
71 | stdu r1,-128(r1) | |
72 | mtlr r0 | |
73 | std r0,0(r1) | |
74 | ||
75 | /* put the address of start_addresses in r8... ** | |
76 | ** PPC64 ABI uses R13 for thread local, so we leave it alone */ | |
77 | ld r8,.L01(r2) | |
78 | ||
79 | /* and continue in libc-start, in glibc. */ | |
2d67d91a | 80 | b JUMPTARGET(__libc_start_main) |
c84ce4f1 UD |
81 | /* The linker needs this nop to recognize that it's OK to call via a |
82 | TOC adjusting stub. */ | |
83 | nop | |
cfc91acd RM |
84 | |
85 | END(_start) | |
86 | ||
87 | /* Define a symbol for the first piece of initialized data. */ | |
88 | .section ".data" | |
89 | .globl __data_start | |
90 | __data_start: | |
e42e88ab | 91 | .long 0 |
cfc91acd | 92 | weak_alias (__data_start, data_start) |