1/* 2 * Linker script for gate DSO. The gate pages are an ELF shared object prelinked to its 3 * virtual address, with only one read-only segment and one execute-only segment (both fit 4 * in one page). This script controls its layout. 5 */ 6 7 8#include <asm/system.h> 9 10SECTIONS 11{ 12 . = GATE_ADDR + SIZEOF_HEADERS; 13 14 .hash : { *(.hash) } :readable 15 .gnu.hash : { *(.gnu.hash) } 16 .dynsym : { *(.dynsym) } 17 .dynstr : { *(.dynstr) } 18 .gnu.version : { *(.gnu.version) } 19 .gnu.version_d : { *(.gnu.version_d) } 20 .gnu.version_r : { *(.gnu.version_r) } 21 .dynamic : { *(.dynamic) } :readable :dynamic 22 23 /* 24 * This linker script is used both with -r and with -shared. For the layouts to match, 25 * we need to skip more than enough space for the dynamic symbol table et al. If this 26 * amount is insufficient, ld -shared will barf. Just increase it here. 27 */ 28 . = GATE_ADDR + 0x500; 29 30 .data.patch : { 31 __start_gate_mckinley_e9_patchlist = .; 32 *(.data.patch.mckinley_e9) 33 __end_gate_mckinley_e9_patchlist = .; 34 35 __start_gate_vtop_patchlist = .; 36 *(.data.patch.vtop) 37 __end_gate_vtop_patchlist = .; 38 39 __start_gate_fsyscall_patchlist = .; 40 *(.data.patch.fsyscall_table) 41 __end_gate_fsyscall_patchlist = .; 42 43 __start_gate_brl_fsys_bubble_down_patchlist = .; 44 *(.data.patch.brl_fsys_bubble_down) 45 __end_gate_brl_fsys_bubble_down_patchlist = .; 46 } :readable 47 .IA_64.unwind_info : { *(.IA_64.unwind_info*) } 48 .IA_64.unwind : { *(.IA_64.unwind*) } :readable :unwind 49#ifdef HAVE_BUGGY_SEGREL 50 .text (GATE_ADDR + PAGE_SIZE) : { *(.text) *(.text.*) } :readable 51#else 52 . = ALIGN (PERCPU_PAGE_SIZE) + (. & (PERCPU_PAGE_SIZE - 1)); 53 .text : { *(.text) *(.text.*) } :epc 54#endif 55 56 /DISCARD/ : { 57 *(.got.plt) *(.got) 58 *(.data .data.* .gnu.linkonce.d.*) 59 *(.dynbss) 60 *(.bss .bss.* .gnu.linkonce.b.*) 61 *(__ex_table) 62 *(__mca_table) 63 } 64} 65 66/* 67 * We must supply the ELF program headers explicitly to get just one 68 * PT_LOAD segment, and set the flags explicitly to make segments read-only. 69 */ 70PHDRS 71{ 72 readable PT_LOAD FILEHDR PHDRS FLAGS(4); /* PF_R */ 73#ifndef HAVE_BUGGY_SEGREL 74 epc PT_LOAD FILEHDR PHDRS FLAGS(1); /* PF_X */ 75#endif 76 dynamic PT_DYNAMIC FLAGS(4); /* PF_R */ 77 unwind 0x70000001; /* PT_IA_64_UNWIND, but ld doesn't match the name */ 78} 79 80/* 81 * This controls what symbols we export from the DSO. 82 */ 83VERSION 84{ 85 LINUX_2.5 { 86 global: 87 __kernel_syscall_via_break; 88 __kernel_syscall_via_epc; 89 __kernel_sigtramp; 90 91 local: *; 92 }; 93} 94 95/* The ELF entry point can be used to set the AT_SYSINFO value. */ 96ENTRY(__kernel_syscall_via_epc) 97