1/*
2 * Linker script for vsyscall DSO.  The vsyscall page is an ELF shared
3 * object prelinked to its virtual address, and with only one read-only
4 * segment (that fits in one page).  This script controls its layout.
5 */
6#include <asm/asm-offsets.h>
7
8#ifdef CONFIG_CPU_LITTLE_ENDIAN
9OUTPUT_FORMAT("elf32-sh-linux", "elf32-sh-linux", "elf32-sh-linux")
10#else
11OUTPUT_FORMAT("elf32-shbig-linux", "elf32-shbig-linux", "elf32-shbig-linux")
12#endif
13OUTPUT_ARCH(sh)
14
15/* The ELF entry point can be used to set the AT_SYSINFO value.  */
16ENTRY(__kernel_vsyscall);
17
18SECTIONS
19{
20  . = SIZEOF_HEADERS;
21
22  .hash           : { *(.hash) }		:text
23  .gnu.hash       : { *(.gnu.hash) }
24  .dynsym         : { *(.dynsym) }
25  .dynstr         : { *(.dynstr) }
26  .gnu.version    : { *(.gnu.version) }
27  .gnu.version_d  : { *(.gnu.version_d) }
28  .gnu.version_r  : { *(.gnu.version_r) }
29
30  /* This linker script is used both with -r and with -shared.
31     For the layouts to match, we need to skip more than enough
32     space for the dynamic symbol table et al.  If this amount
33     is insufficient, ld -shared will barf.  Just increase it here.  */
34  . = 0x400;
35
36  .text           : { *(.text) }		:text =0x90909090
37  .note		  : { *(.note.*) }		:text :note
38  .eh_frame_hdr   : { *(.eh_frame_hdr) }	:text :eh_frame_hdr
39  .eh_frame       : { KEEP (*(.eh_frame)) }	:text
40  .dynamic        : { *(.dynamic) }		:text :dynamic
41  .useless        : {
42  	*(.got.plt) *(.got)
43	*(.data .data.* .gnu.linkonce.d.*)
44	*(.dynbss)
45	*(.bss .bss.* .gnu.linkonce.b.*)
46  }						:text
47}
48
49/*
50 * We must supply the ELF program headers explicitly to get just one
51 * PT_LOAD segment, and set the flags explicitly to make segments read-only.
52 */
53PHDRS
54{
55  text PT_LOAD FILEHDR PHDRS FLAGS(5); /* PF_R|PF_X */
56  dynamic PT_DYNAMIC FLAGS(4); /* PF_R */
57  note PT_NOTE FLAGS(4); /* PF_R */
58  eh_frame_hdr 0x6474e550; /* PT_GNU_EH_FRAME, but ld doesn't match the name */
59}
60
61/*
62 * This controls what symbols we export from the DSO.
63 */
64VERSION
65{
66  LINUX_2.6 {
67    global:
68    	__kernel_vsyscall;
69    	__kernel_sigreturn;
70    	__kernel_rt_sigreturn;
71
72    local: *;
73  };
74}
75