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#include <linux/config.h> 8 9#include <asm/system.h> 10 11SECTIONS 12{ 13 . = GATE_ADDR + SIZEOF_HEADERS; 14 15 .hash : { *(.hash) } :readable 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 } 63} 64 65/* 66 * We must supply the ELF program headers explicitly to get just one 67 * PT_LOAD segment, and set the flags explicitly to make segments read-only. 68 */ 69PHDRS 70{ 71 readable PT_LOAD FILEHDR PHDRS FLAGS(4); /* PF_R */ 72#ifndef HAVE_BUGGY_SEGREL 73 epc PT_LOAD FILEHDR PHDRS FLAGS(1); /* PF_X */ 74#endif 75 dynamic PT_DYNAMIC FLAGS(4); /* PF_R */ 76 unwind 0x70000001; /* PT_IA_64_UNWIND, but ld doesn't match the name */ 77} 78 79/* 80 * This controls what symbols we export from the DSO. 81 */ 82VERSION 83{ 84 LINUX_2.5 { 85 global: 86 __kernel_syscall_via_break; 87 __kernel_syscall_via_epc; 88 __kernel_sigtramp; 89 90 local: *; 91 }; 92} 93 94/* The ELF entry point can be used to set the AT_SYSINFO value. */ 95ENTRY(__kernel_syscall_via_epc) 96