1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Linker script for gate DSO. The gate pages are an ELF shared object
4 * prelinked to its virtual address, with only one read-only segment and
5 * one execute-only segment (both fit in one page). This script controls
6 * its layout.
7 */
8
9 #include <asm/page.h>
10
11 SECTIONS
12 {
13 . = GATE_ADDR + SIZEOF_HEADERS;
14
15 .hash : { *(.hash) } :readable
16 .gnu.hash : { *(.gnu.hash) }
17 .dynsym : { *(.dynsym) }
18 .dynstr : { *(.dynstr) }
19 .gnu.version : { *(.gnu.version) }
20 .gnu.version_d : { *(.gnu.version_d) }
21 .gnu.version_r : { *(.gnu.version_r) }
22
23 .note : { *(.note*) } :readable :note
24
25 .dynamic : { *(.dynamic) } :readable :dynamic
26
27 /*
28 * This linker script is used both with -r and with -shared. For
29 * the layouts to match, we need to skip more than enough space for
30 * the dynamic symbol table et al. If this amount is insufficient,
31 * ld -shared will barf. Just increase it here.
32 */
33 . = GATE_ADDR + 0x600;
34
35 .data..patch : {
36 __start_gate_mckinley_e9_patchlist = .;
37 *(.data..patch.mckinley_e9)
38 __end_gate_mckinley_e9_patchlist = .;
39
40 __start_gate_vtop_patchlist = .;
41 *(.data..patch.vtop)
42 __end_gate_vtop_patchlist = .;
43
44 __start_gate_fsyscall_patchlist = .;
45 *(.data..patch.fsyscall_table)
46 __end_gate_fsyscall_patchlist = .;
47
48 __start_gate_brl_fsys_bubble_down_patchlist = .;
49 *(.data..patch.brl_fsys_bubble_down)
50 __end_gate_brl_fsys_bubble_down_patchlist = .;
51 } :readable
52
53 .IA_64.unwind_info : { *(.IA_64.unwind_info*) }
54 .IA_64.unwind : { *(.IA_64.unwind*) } :readable :unwind
55 #ifdef HAVE_BUGGY_SEGREL
56 .text (GATE_ADDR + PAGE_SIZE) : { *(.text) *(.text.*) } :readable
57 #else
58 . = ALIGN(PERCPU_PAGE_SIZE) + (. & (PERCPU_PAGE_SIZE - 1));
59 .text : { *(.text) *(.text.*) } :epc
60 #endif
61
62 /DISCARD/ : {
63 *(.got.plt) *(.got)
64 *(.data .data.* .gnu.linkonce.d.*)
65 *(.dynbss)
66 *(.bss .bss.* .gnu.linkonce.b.*)
67 *(__ex_table)
68 *(__mca_table)
69 }
70 }
71
72 /*
73 * ld does not recognize this name token; use the constant.
74 */
75 #define PT_IA_64_UNWIND 0x70000001
76
77 /*
78 * We must supply the ELF program headers explicitly to get just one
79 * PT_LOAD segment, and set the flags explicitly to make segments read-only.
80 */
81 PHDRS
82 {
83 readable PT_LOAD FILEHDR PHDRS FLAGS(4); /* PF_R */
84 #ifndef HAVE_BUGGY_SEGREL
85 epc PT_LOAD FILEHDR PHDRS FLAGS(1); /* PF_X */
86 #endif
87 dynamic PT_DYNAMIC FLAGS(4); /* PF_R */
88 note PT_NOTE FLAGS(4); /* PF_R */
89 unwind PT_IA_64_UNWIND;
90 }
91
92 /*
93 * This controls what symbols we export from the DSO.
94 */
95 VERSION
96 {
97 LINUX_2.5 {
98 global:
99 __kernel_syscall_via_break;
100 __kernel_syscall_via_epc;
101 __kernel_sigtramp;
102
103 local: *;
104 };
105 }
106
107 /* The ELF entry point can be used to set the AT_SYSINFO value. */
108 ENTRY(__kernel_syscall_via_epc)