1 | /* |
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2 | * Linker script for gate DSO. The gate pages are an ELF shared object prelinked to its |
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3 | * virtual address, with only one read-only segment and one execute-only segment (both fit |
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4 | * in one page). This script controls its layout. |
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5 | */ |
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6 | |
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7 | |
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8 | #include <asm/system.h> |
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9 | |
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10 | SECTIONS |
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11 | { |
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12 | . = GATE_ADDR + SIZEOF_HEADERS; |
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13 | |
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14 | .hash : { *(.hash) } :readable |
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15 | .gnu.hash : { *(.gnu.hash) } |
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16 | .dynsym : { *(.dynsym) } |
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17 | .dynstr : { *(.dynstr) } |
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18 | .gnu.version : { *(.gnu.version) } |
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19 | .gnu.version_d : { *(.gnu.version_d) } |
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20 | .gnu.version_r : { *(.gnu.version_r) } |
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21 | .dynamic : { *(.dynamic) } :readable :dynamic |
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22 | |
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23 | /* |
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24 | * This linker script is used both with -r and with -shared. For the layouts to match, |
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25 | * we need to skip more than enough space for the dynamic symbol table et al. If this |
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26 | * amount is insufficient, ld -shared will barf. Just increase it here. |
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27 | */ |
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28 | . = GATE_ADDR + 0x500; |
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29 | |
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30 | .data.patch : { |
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31 | __start_gate_mckinley_e9_patchlist = .; |
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32 | *(.data.patch.mckinley_e9) |
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33 | __end_gate_mckinley_e9_patchlist = .; |
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34 | |
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35 | __start_gate_vtop_patchlist = .; |
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36 | *(.data.patch.vtop) |
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37 | __end_gate_vtop_patchlist = .; |
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38 | |
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39 | __start_gate_fsyscall_patchlist = .; |
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40 | *(.data.patch.fsyscall_table) |
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41 | __end_gate_fsyscall_patchlist = .; |
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42 | |
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43 | __start_gate_brl_fsys_bubble_down_patchlist = .; |
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44 | *(.data.patch.brl_fsys_bubble_down) |
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45 | __end_gate_brl_fsys_bubble_down_patchlist = .; |
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46 | |
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47 | #ifdef CONFIG_XEN_IA64_VDSO_PARAVIRT |
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48 | __start_gate_running_on_xen_patchlist = .; |
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49 | *(.data.patch.running_on_xen) |
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50 | __end_gate_running_on_xen_patchlist = .; |
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51 | |
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52 | __start_gate_brl_xen_ssm_i_0_patchlist = .; |
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53 | *(.data.patch.brl_xen_ssm_i_0) |
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54 | __end_gate_brl_xen_ssm_i_0_patchlist = .; |
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55 | |
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56 | __start_gate_brl_xen_ssm_i_1_patchlist = .; |
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57 | *(.data.patch.brl_xen_ssm_i_1) |
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58 | __end_gate_brl_xen_ssm_i_1_patchlist = .; |
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59 | #endif |
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60 | } :readable |
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61 | .IA_64.unwind_info : { *(.IA_64.unwind_info*) } |
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62 | .IA_64.unwind : { *(.IA_64.unwind*) } :readable :unwind |
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63 | #ifdef HAVE_BUGGY_SEGREL |
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64 | .text (GATE_ADDR + PAGE_SIZE) : { *(.text) *(.text.*) } :readable |
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65 | #else |
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66 | . = ALIGN (PERCPU_PAGE_SIZE) + (. & (PERCPU_PAGE_SIZE - 1)); |
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67 | .text : { *(.text) *(.text.*) } :epc |
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68 | #endif |
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69 | |
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70 | /DISCARD/ : { |
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71 | *(.got.plt) *(.got) |
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72 | *(.data .data.* .gnu.linkonce.d.*) |
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73 | *(.dynbss) |
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74 | *(.bss .bss.* .gnu.linkonce.b.*) |
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75 | *(__ex_table) |
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76 | *(__mca_table) |
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77 | } |
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78 | } |
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79 | |
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80 | /* |
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81 | * We must supply the ELF program headers explicitly to get just one |
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82 | * PT_LOAD segment, and set the flags explicitly to make segments read-only. |
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83 | */ |
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84 | PHDRS |
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85 | { |
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86 | readable PT_LOAD FILEHDR PHDRS FLAGS(4); /* PF_R */ |
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87 | #ifndef HAVE_BUGGY_SEGREL |
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88 | epc PT_LOAD FILEHDR PHDRS FLAGS(1); /* PF_X */ |
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89 | #endif |
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90 | dynamic PT_DYNAMIC FLAGS(4); /* PF_R */ |
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91 | unwind 0x70000001; /* PT_IA_64_UNWIND, but ld doesn't match the name */ |
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92 | } |
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93 | |
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94 | /* |
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95 | * This controls what symbols we export from the DSO. |
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96 | */ |
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97 | VERSION |
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98 | { |
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99 | LINUX_2.5 { |
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100 | global: |
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101 | __kernel_syscall_via_break; |
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102 | __kernel_syscall_via_epc; |
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103 | __kernel_sigtramp; |
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104 | |
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105 | local: *; |
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106 | }; |
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107 | } |
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108 | |
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109 | /* The ELF entry point can be used to set the AT_SYSINFO value. */ |
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110 | ENTRY(__kernel_syscall_via_epc) |
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