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#include <asm/page.h> 9#include "paravirt_patchlist.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 .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 __paravirt_start_gate_mckinley_e9_patchlist = .; 37 *(.data..patch.mckinley_e9) 38 __paravirt_end_gate_mckinley_e9_patchlist = .; 39 40 __paravirt_start_gate_vtop_patchlist = .; 41 *(.data..patch.vtop) 42 __paravirt_end_gate_vtop_patchlist = .; 43 44 __paravirt_start_gate_fsyscall_patchlist = .; 45 *(.data..patch.fsyscall_table) 46 __paravirt_end_gate_fsyscall_patchlist = .; 47 48 __paravirt_start_gate_brl_fsys_bubble_down_patchlist = .; 49 *(.data..patch.brl_fsys_bubble_down) 50 __paravirt_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 */ 81PHDRS 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 */ 95VERSION 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. */ 108ENTRY(__kernel_syscall_via_epc) 109