1/* 2 * Linker script for gate DSO. The gate pages are an ELF shared object 3 * prelinked to its virtual address, with only one read-only segment and 4 * one execute-only segment (both fit in one page). This script controls 5 * its layout. 6 */ 7 8 9#include <asm/system.h> 10 11SECTIONS 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 .dynamic : { *(.dynamic) } :readable :dynamic 24 25 /* 26 * This linker script is used both with -r and with -shared. For 27 * the layouts to match, we need to skip more than enough space for 28 * the dynamic symbol table et al. If this amount is insufficient, 29 * ld -shared will barf. Just increase it here. 30 */ 31 . = GATE_ADDR + 0x500; 32 33 .data.patch : { 34 __start_gate_mckinley_e9_patchlist = .; 35 *(.data.patch.mckinley_e9) 36 __end_gate_mckinley_e9_patchlist = .; 37 38 __start_gate_vtop_patchlist = .; 39 *(.data.patch.vtop) 40 __end_gate_vtop_patchlist = .; 41 42 __start_gate_fsyscall_patchlist = .; 43 *(.data.patch.fsyscall_table) 44 __end_gate_fsyscall_patchlist = .; 45 46 __start_gate_brl_fsys_bubble_down_patchlist = .; 47 *(.data.patch.brl_fsys_bubble_down) 48 __end_gate_brl_fsys_bubble_down_patchlist = .; 49 } :readable 50 51 .IA_64.unwind_info : { *(.IA_64.unwind_info*) } 52 .IA_64.unwind : { *(.IA_64.unwind*) } :readable :unwind 53#ifdef HAVE_BUGGY_SEGREL 54 .text (GATE_ADDR + PAGE_SIZE) : { *(.text) *(.text.*) } :readable 55#else 56 . = ALIGN(PERCPU_PAGE_SIZE) + (. & (PERCPU_PAGE_SIZE - 1)); 57 .text : { *(.text) *(.text.*) } :epc 58#endif 59 60 /DISCARD/ : { 61 *(.got.plt) *(.got) 62 *(.data .data.* .gnu.linkonce.d.*) 63 *(.dynbss) 64 *(.bss .bss.* .gnu.linkonce.b.*) 65 *(__ex_table) 66 *(__mca_table) 67 } 68} 69 70/* 71 * ld does not recognize this name token; use the constant. 72 */ 73#define PT_IA_64_UNWIND 0x70000001 74 75/* 76 * We must supply the ELF program headers explicitly to get just one 77 * PT_LOAD segment, and set the flags explicitly to make segments read-only. 78 */ 79PHDRS 80{ 81 readable PT_LOAD FILEHDR PHDRS FLAGS(4); /* PF_R */ 82#ifndef HAVE_BUGGY_SEGREL 83 epc PT_LOAD FILEHDR PHDRS FLAGS(1); /* PF_X */ 84#endif 85 dynamic PT_DYNAMIC FLAGS(4); /* PF_R */ 86 unwind PT_IA_64_UNWIND; 87} 88 89/* 90 * This controls what symbols we export from the DSO. 91 */ 92VERSION 93{ 94 LINUX_2.5 { 95 global: 96 __kernel_syscall_via_break; 97 __kernel_syscall_via_epc; 98 __kernel_sigtramp; 99 100 local: *; 101 }; 102} 103 104/* The ELF entry point can be used to set the AT_SYSINFO value. */ 105ENTRY(__kernel_syscall_via_epc) 106