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#include "paravirt_patchlist.h" 11 12SECTIONS 13{ 14 . = GATE_ADDR + SIZEOF_HEADERS; 15 16 .hash : { *(.hash) } :readable 17 .gnu.hash : { *(.gnu.hash) } 18 .dynsym : { *(.dynsym) } 19 .dynstr : { *(.dynstr) } 20 .gnu.version : { *(.gnu.version) } 21 .gnu.version_d : { *(.gnu.version_d) } 22 .gnu.version_r : { *(.gnu.version_r) } 23 24 .note : { *(.note*) } :readable :note 25 26 .dynamic : { *(.dynamic) } :readable :dynamic 27 28 /* 29 * This linker script is used both with -r and with -shared. For 30 * the layouts to match, we need to skip more than enough space for 31 * the dynamic symbol table et al. If this amount is insufficient, 32 * ld -shared will barf. Just increase it here. 33 */ 34 . = GATE_ADDR + 0x600; 35 36 .data..patch : { 37 __paravirt_start_gate_mckinley_e9_patchlist = .; 38 *(.data..patch.mckinley_e9) 39 __paravirt_end_gate_mckinley_e9_patchlist = .; 40 41 __paravirt_start_gate_vtop_patchlist = .; 42 *(.data..patch.vtop) 43 __paravirt_end_gate_vtop_patchlist = .; 44 45 __paravirt_start_gate_fsyscall_patchlist = .; 46 *(.data..patch.fsyscall_table) 47 __paravirt_end_gate_fsyscall_patchlist = .; 48 49 __paravirt_start_gate_brl_fsys_bubble_down_patchlist = .; 50 *(.data..patch.brl_fsys_bubble_down) 51 __paravirt_end_gate_brl_fsys_bubble_down_patchlist = .; 52 } :readable 53 54 .IA_64.unwind_info : { *(.IA_64.unwind_info*) } 55 .IA_64.unwind : { *(.IA_64.unwind*) } :readable :unwind 56#ifdef HAVE_BUGGY_SEGREL 57 .text (GATE_ADDR + PAGE_SIZE) : { *(.text) *(.text.*) } :readable 58#else 59 . = ALIGN(PERCPU_PAGE_SIZE) + (. & (PERCPU_PAGE_SIZE - 1)); 60 .text : { *(.text) *(.text.*) } :epc 61#endif 62 63 /DISCARD/ : { 64 *(.got.plt) *(.got) 65 *(.data .data.* .gnu.linkonce.d.*) 66 *(.dynbss) 67 *(.bss .bss.* .gnu.linkonce.b.*) 68 *(__ex_table) 69 *(__mca_table) 70 } 71} 72 73/* 74 * ld does not recognize this name token; use the constant. 75 */ 76#define PT_IA_64_UNWIND 0x70000001 77 78/* 79 * We must supply the ELF program headers explicitly to get just one 80 * PT_LOAD segment, and set the flags explicitly to make segments read-only. 81 */ 82PHDRS 83{ 84 readable PT_LOAD FILEHDR PHDRS FLAGS(4); /* PF_R */ 85#ifndef HAVE_BUGGY_SEGREL 86 epc PT_LOAD FILEHDR PHDRS FLAGS(1); /* PF_X */ 87#endif 88 dynamic PT_DYNAMIC FLAGS(4); /* PF_R */ 89 note PT_NOTE FLAGS(4); /* PF_R */ 90 unwind PT_IA_64_UNWIND; 91} 92 93/* 94 * This controls what symbols we export from the DSO. 95 */ 96VERSION 97{ 98 LINUX_2.5 { 99 global: 100 __kernel_syscall_via_break; 101 __kernel_syscall_via_epc; 102 __kernel_sigtramp; 103 104 local: *; 105 }; 106} 107 108/* The ELF entry point can be used to set the AT_SYSINFO value. */ 109ENTRY(__kernel_syscall_via_epc) 110