1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 | #include <asm/vdso.h> /* * Linker script for vDSO. This is an ELF shared object prelinked to * its virtual address, and with only one read-only segment. * This script controls its layout. */ #if defined(BUILD_VDSO64) # define SHDR_SIZE 64 #elif defined(BUILD_VDSO32) || defined(BUILD_VDSOX32) # define SHDR_SIZE 40 #else # error unknown VDSO target #endif #define NUM_FAKE_SHDRS 13 SECTIONS { /* * User/kernel shared data is before the vDSO. This may be a little * uglier than putting it after the vDSO, but it avoids issues with * non-allocatable things that dangle past the end of the PT_LOAD * segment. */ vvar_start = . - 2 * PAGE_SIZE; vvar_page = vvar_start; /* Place all vvars at the offsets in asm/vvar.h. */ #define EMIT_VVAR(name, offset) vvar_ ## name = vvar_page + offset; #define __VVAR_KERNEL_LDS #include <asm/vvar.h> #undef __VVAR_KERNEL_LDS #undef EMIT_VVAR pvclock_page = vvar_start + PAGE_SIZE; . = SIZEOF_HEADERS; .hash : { *(.hash) } :text .gnu.hash : { *(.gnu.hash) } .dynsym : { *(.dynsym) } .dynstr : { *(.dynstr) } .gnu.version : { *(.gnu.version) } .gnu.version_d : { *(.gnu.version_d) } .gnu.version_r : { *(.gnu.version_r) } .dynamic : { *(.dynamic) } :text :dynamic .rodata : { *(.rodata*) *(.data*) *(.sdata*) *(.got.plt) *(.got) *(.gnu.linkonce.d.*) *(.bss*) *(.dynbss*) *(.gnu.linkonce.b.*) /* * Ideally this would live in a C file, but that won't * work cleanly for x32 until we start building the x32 * C code using an x32 toolchain. */ VDSO_FAKE_SECTION_TABLE_START = .; . = . + NUM_FAKE_SHDRS * SHDR_SIZE; VDSO_FAKE_SECTION_TABLE_END = .; } :text .fake_shstrtab : { *(.fake_shstrtab) } :text .note : { *(.note.*) } :text :note .eh_frame_hdr : { *(.eh_frame_hdr) } :text :eh_frame_hdr .eh_frame : { KEEP (*(.eh_frame)) } :text /* * Text is well-separated from actual data: there's plenty of * stuff that isn't used at runtime in between. */ .text : { *(.text*) } :text =0x90909090, /* * At the end so that eu-elflint stays happy when vdso2c strips * these. A better implementation would avoid allocating space * for these. */ .altinstructions : { *(.altinstructions) } :text .altinstr_replacement : { *(.altinstr_replacement) } :text /DISCARD/ : { *(.discard) *(.discard.*) *(__bug_table) } } /* * Very old versions of ld do not recognize this name token; use the constant. */ #define PT_GNU_EH_FRAME 0x6474e550 /* * We must supply the ELF program headers explicitly to get just one * PT_LOAD segment, and set the flags explicitly to make segments read-only. */ PHDRS { text PT_LOAD FLAGS(5) FILEHDR PHDRS; /* PF_R|PF_X */ dynamic PT_DYNAMIC FLAGS(4); /* PF_R */ note PT_NOTE FLAGS(4); /* PF_R */ eh_frame_hdr PT_GNU_EH_FRAME; } |