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cross-avr-binutils
s390-relro.diff
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File s390-relro.diff of Package cross-avr-binutils
Implement fate#326356 This combines commits afca762f and a381372 to implement RELRO properly on s390. Before that the order of .got.plt vs. .got was such that the latter couldn't be made read-only when lazy linking was enabled. commit afca762f598d453c563f244cd3777715b1a0cb72 Author: Andreas Krebbel <krebbel@linux.vnet.ibm.com> Date: Thu Dec 21 13:12:03 2017 +0100 S/390: Improve partial relro support for 64 bit Currently on S/390 the .got.plt always comes first which prevents the GNU_RELRO segment from being extended across the non-plt GOT entries. Just swapping both unfortunately is not that simple since our ABI requires the _GLOBAL_OFFSET_TABLE_ symbol to point to the very beginning of the entire GOT. Of the 3 magic GOT entries the first is accessed via got pointer while second and third are being accessed via DT_PLTGOT. In order to keep them together we make DT_PLTGOT to point to the .got instead of .got.plt. However, this violates an assumption in the dynamic linker prelink undo code about the GOTPLT entries starting at DT_PLTGOT + 3. We got rid of this requirement with a Glibc patch already in version 2.24: https://sourceware.org/ml/libc-alpha/2016-06/msg01302.html So the S/390 relro GOT layout will look like this with this patch: +----------------------------------+ |got[0]: DYNAMIC | <--- _GLOBAL_OFFSET_TABLE_ == DT_PLTGOT .got |got[1]: link_map parm | |got[2]: &_dl_runtime_resolve | +----------------------------------+ | | non-plt GOT entries | | | | +----------------------------------+ | | <--- .gotplt, PLT GOT entries | | | | | | +----------------------------------+ The patch detects the current layout in size_dynamic_section in order to deal also with linker scripts not generated by this ld version. With partial relro enabled we pick a linker script where .got and .got.plt are swapped which then triggers the rest of the logic. ld/ChangeLog: 2018-07-18 Andreas Krebbel <krebbel@linux.ibm.com> * emulparams/elf64_s390.sh: Define GENERATE_RELRO_SCRIPT and SEPARATE_GOTPLT. * testsuite/ld-s390/gotreloc_64-relro-1.dd: New test. * testsuite/ld-s390/gotreloc_64-norelro-1.dd: Renamed from ... * testsuite/ld-s390/gotreloc_64-1.dd: ... this. * testsuite/ld-s390/s390.exp: Split the GOT testcase into two. bfd/ChangeLog: 2018-07-18 Andreas Krebbel <krebbel@linux.ibm.com> * elf-s390-common.c (s390_gotplt_after_got_p): New function. (s390_got_pointer): New function. (s390_got_offset): New function. (s390_gotplt_offset): New function. * elf64-s390.c (allocate_dynrelocs): Adjust comment. (elf_s390_size_dynamic_sections): Move space for magic GOT entries from .got.plt to .got if necessary and pick the right location for _GLOBAL_OFFSET_TABLE_. (elf_s390_relocate_section): Use the wrapper functions from elf-s390-common.c to deal with both possible layouts (either .got or .got.plt first). (elf_s390_finish_dynamic_sections): Likewise. (elf_s390_finish_dynamic_symbol): Make the location of the GOT magic entries conditional. commit a38137289e91fd548fc27fb6566a439233b94d65 Author: Andreas Krebbel <krebbel@linux.vnet.ibm.com> Date: Mon Jun 11 13:23:00 2018 +0200 ld: Enable using separate linker script for -z relro With this patch dedicated linker scripts can be generated for partial relro triggered by defining GENERATE_RELRO_SCRIPT in the target specific scripts. This is necessary for e.g. S/390 where usually the .got.plt comes first and prevents the relro segment from being extended across the non-plt GOT entries. The patch started with the work from Marcin taken from the mwk user branches. However, the patch needed substantial changes due to the 'separate code' feature which got committed in the meantime. ld/ChangeLog: 2018-07-18 Andreas Krebbel <krebbel@linux.ibm.com> Marcin Kościelnicki <koriakin@0x04.net> * emultempl/elf32.em: Add code to pick dedicated linker scripts for partial relro. * genscripts.sh: Generate dedicated linker scripts for partial relro. Index: binutils-2.31/bfd/elf-s390-common.c =================================================================== --- binutils-2.31.orig/bfd/elf-s390-common.c 2018-06-24 20:38:56.000000000 +0200 +++ binutils-2.31/bfd/elf-s390-common.c 2019-01-24 15:07:25.000000000 +0100 @@ -30,6 +30,87 @@ s390_is_ifunc_symbol_p (struct elf_link_ return h->type == STT_GNU_IFUNC || eh->ifunc_resolver_address != 0; } +/* Return true if .got.plt is supposed to be emitted after .got. */ + +static inline bfd_boolean +s390_gotplt_after_got_p (struct bfd_link_info *info) +{ + struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info); + + if (!htab->elf.sgot || !htab->elf.sgotplt) + return TRUE; + + if (htab->elf.sgot->output_section == htab->elf.sgotplt->output_section) + { + if (htab->elf.sgot->output_offset < htab->elf.sgotplt->output_offset) + return TRUE; + } + else + { + if (htab->elf.sgot->output_section->vma + <= htab->elf.sgotplt->output_section->vma) + return TRUE; + } + return FALSE; +} + +/* Return the value of the _GLOBAL_OFFSET_TABLE_ symbol. */ + +static inline bfd_vma +s390_got_pointer (struct bfd_link_info *info) +{ + struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info); + bfd_vma got_pointer; + + BFD_ASSERT (htab && htab->elf.hgot); + + got_pointer = (htab->elf.hgot->root.u.def.section->output_section->vma + + htab->elf.hgot->root.u.def.section->output_offset); + /* Our ABI requires the GOT pointer to point at the very beginning + of the global offset table. */ + BFD_ASSERT (got_pointer + <= (htab->elf.sgot->output_section->vma + + htab->elf.sgot->output_offset)); + BFD_ASSERT (got_pointer + <= (htab->elf.sgotplt->output_section->vma + + htab->elf.sgotplt->output_offset)); + + return got_pointer; +} + + +/* Return the offset of the .got versus _GLOBAL_OFFSET_TABLE_. */ + +static inline bfd_vma +s390_got_offset (struct bfd_link_info *info) +{ + struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info); + + /* The absolute address of the .got in the target image. */ + bfd_vma got_address = (htab->elf.sgot->output_section->vma + + htab->elf.sgot->output_offset); + + /* GOT offset must not be negative. */ + BFD_ASSERT (s390_got_pointer (info) <= got_address); + return got_address - s390_got_pointer (info); +} + +/* Return the offset of the .got.plt versus _GLOBAL_OFFSET_TABLE_. */ + +static inline bfd_vma +s390_gotplt_offset (struct bfd_link_info *info) +{ + struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info); + + /* The absolute address of the .got.plt in the target image. */ + bfd_vma gotplt_address = (htab->elf.sgotplt->output_section->vma + + htab->elf.sgotplt->output_offset); + + /* GOT offset must not be negative. */ + BFD_ASSERT (s390_got_pointer (info) <= gotplt_address); + return gotplt_address - s390_got_pointer (info); +} + /* Create sections needed by STT_GNU_IFUNC symbol. */ static bfd_boolean Index: binutils-2.31/bfd/elf64-s390.c =================================================================== --- binutils-2.31.orig/bfd/elf64-s390.c 2018-07-10 09:12:05.000000000 +0200 +++ binutils-2.31/bfd/elf64-s390.c 2019-01-24 15:07:25.000000000 +0100 @@ -481,7 +481,7 @@ elf_s390_is_local_label_name (bfd *abfd, #define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela) -/* The first three entries in a procedure linkage table are reserved, +/* The first three entries in a global offset table are reserved, and the initial contents are unimportant (we zero them out). Subsequent entries look like this. See the SVR4 ABI 386 supplement to see how this works. */ @@ -511,8 +511,8 @@ elf_s390_is_local_label_name (bfd *abfd, LG 1,0(1) # 6 bytes Load address from GOT in r1 BCR 15,1 # 2 bytes Jump to address RET1: BASR 1,0 # 2 bytes Return from GOT 1st time - LGF 1,12(1) # 6 bytes Load offset in symbl table in r1 - BRCL 15,-x # 6 bytes Jump to start of PLT + LGF 1,12(1) # 6 bytes Load rela.plt offset into r1 + BRCL 15,-x # 6 bytes Jump to first PLT entry .long ? # 4 bytes offset into .rela.plt Total = 32 bytes per PLT entry @@ -1605,8 +1605,7 @@ allocate_dynrelocs (struct elf_link_hash /* Make room for this entry. */ s->size += PLT_ENTRY_SIZE; - /* We also need to make an entry in the .got.plt section, which - will be placed in the .got section by the linker script. */ + /* We also need to make an entry in the .got.plt section. */ htab->elf.sgotplt->size += GOT_ENTRY_SIZE; /* We also need to make an entry in the .rela.plt section. */ @@ -1831,6 +1830,20 @@ elf_s390_size_dynamic_sections (bfd *out } } + if (htab->elf.sgot && s390_gotplt_after_got_p (info)) + { + /* _bfd_elf_create_got_section adds the got header size always + to .got.plt but we need it in .got if this section comes + first. */ + htab->elf.sgot->size += 3 * GOT_ENTRY_SIZE; + htab->elf.sgotplt->size -= 3 * GOT_ENTRY_SIZE; + + /* Make the _GLOBAL_OFFSET_TABLE_ symbol point to the .got + instead of .got.plt. */ + htab->elf.hgot->root.u.def.section = htab->elf.sgot; + htab->elf.hgot->root.u.def.value = 0; + } + /* Set up .got offsets for local syms, and space for local dynamic relocs. */ for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) @@ -2131,7 +2144,6 @@ elf_s390_relocate_section (bfd *output_b bfd_boolean unresolved_reloc; bfd_reloc_status_type r; int tls_type; - asection *base_got = htab->elf.sgot; bfd_boolean resolved_to_zero; r_type = ELF64_R_TYPE (rel->r_info); @@ -2172,7 +2184,7 @@ elf_s390_relocate_section (bfd *output_b case R_390_PLTOFF16: case R_390_PLTOFF32: case R_390_PLTOFF64: - relocation -= htab->elf.sgot->output_section->vma; + relocation -= s390_got_pointer (info); break; case R_390_GOTPLT12: case R_390_GOTPLT16: @@ -2192,10 +2204,10 @@ elf_s390_relocate_section (bfd *output_b htab->elf.sgot->contents + local_got_offsets[r_symndx]); relocation = (local_got_offsets[r_symndx] + - htab->elf.sgot->output_offset); + s390_got_offset (info)); if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT) - relocation += htab->elf.sgot->output_section->vma; + relocation += s390_got_pointer (info); break; } default: @@ -2254,25 +2266,23 @@ elf_s390_relocate_section (bfd *output_b if (s390_is_ifunc_symbol_p (h)) { + /* Entry indices of .iplt and .igot.plt match + 1:1. No magic PLT first entry here. */ plt_index = h->plt.offset / PLT_ENTRY_SIZE; - relocation = (plt_index * GOT_ENTRY_SIZE + - htab->elf.igotplt->output_offset); - if (r_type == R_390_GOTPLTENT) - relocation += htab->elf.igotplt->output_section->vma; + relocation = (plt_index * GOT_ENTRY_SIZE + + s390_gotplt_offset (info) + + htab->elf.igotplt->output_offset); } else { - /* Calc. index no. - Current offset - size first entry / entry size. */ - plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / - PLT_ENTRY_SIZE; - - /* Offset in GOT is PLT index plus GOT headers(3) - times 8, addr & GOT addr. */ - relocation = (plt_index + 3) * GOT_ENTRY_SIZE; - if (r_type == R_390_GOTPLTENT) - relocation += htab->elf.sgot->output_section->vma; + plt_index = ((h->plt.offset - PLT_FIRST_ENTRY_SIZE) + / PLT_ENTRY_SIZE); + + relocation = (plt_index * GOT_ENTRY_SIZE + + s390_gotplt_offset (info)); } + if (r_type == R_390_GOTPLTENT) + relocation += s390_got_pointer (info); unresolved_reloc = FALSE; break; } @@ -2286,7 +2296,7 @@ elf_s390_relocate_section (bfd *output_b case R_390_GOTENT: /* Relocation is to the entry for this symbol in the global offset table. */ - if (base_got == NULL) + if (htab->elf.sgot == NULL) abort (); if (h != NULL) @@ -2303,8 +2313,19 @@ elf_s390_relocate_section (bfd *output_b { /* No explicit GOT usage so redirect to the got.iplt slot. */ - base_got = htab->elf.igotplt; - off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE; + relocation = (s390_gotplt_offset (info) + + htab->elf.igotplt->output_offset + + (h->plt.offset / PLT_ENTRY_SIZE + * GOT_ENTRY_SIZE)); + + /* For @GOTENT the relocation is against the offset between + the instruction and the symbols entry in the GOT and not + between the start of the GOT and the symbols entry. We + add the vma of the GOT to get the correct value. */ + if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT) + relocation += s390_got_pointer (info); + + break; } else { @@ -2337,7 +2358,7 @@ elf_s390_relocate_section (bfd *output_b else { bfd_put_64 (output_bfd, relocation, - base_got->contents + off); + htab->elf.sgot->contents + off); h->got.offset |= 1; } @@ -2419,7 +2440,7 @@ elf_s390_relocate_section (bfd *output_b if (off >= (bfd_vma) -2) abort (); - relocation = base_got->output_offset + off; + relocation = s390_got_offset (info) + off; /* For @GOTENT the relocation is against the offset between the instruction and the symbols entry in the GOT and not @@ -2427,7 +2448,7 @@ elf_s390_relocate_section (bfd *output_b add the vma of the GOT to get the correct value. */ if ( r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT) - relocation += base_got->output_section->vma; + relocation += s390_got_pointer (info); break; @@ -2445,22 +2466,17 @@ elf_s390_relocate_section (bfd *output_b relocation = (htab->elf.iplt->output_section->vma + htab->elf.iplt->output_offset + h->plt.offset - - htab->elf.sgot->output_section->vma); + - s390_got_pointer (info)); goto do_relocation; } - /* Note that sgot->output_offset is not involved in this - calculation. We always want the start of .got. If we - defined _GLOBAL_OFFSET_TABLE in a different way, as is - permitted by the ABI, we might have to change this - calculation. */ - relocation -= htab->elf.sgot->output_section->vma; + relocation -= s390_got_pointer (info); break; case R_390_GOTPC: case R_390_GOTPCDBL: /* Use global offset table as symbol value. */ - relocation = htab->elf.sgot->output_section->vma; + relocation = s390_got_pointer (info); unresolved_reloc = FALSE; break; @@ -2509,7 +2525,7 @@ elf_s390_relocate_section (bfd *output_b || h->plt.offset == (bfd_vma) -1 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h))) { - relocation -= htab->elf.sgot->output_section->vma; + relocation -= s390_got_pointer (info); break; } @@ -2517,12 +2533,12 @@ elf_s390_relocate_section (bfd *output_b relocation = (htab->elf.iplt->output_section->vma + htab->elf.iplt->output_offset + h->plt.offset - - htab->elf.sgot->output_section->vma); + - s390_got_pointer (info)); else relocation = (htab->elf.splt->output_section->vma + htab->elf.splt->output_offset + h->plt.offset - - htab->elf.sgot->output_section->vma); + - s390_got_pointer (info)); unresolved_reloc = FALSE; break; @@ -3296,7 +3312,7 @@ elf_s390_finish_dynamic_symbol (bfd *out if (h->plt.offset != (bfd_vma) -1) { bfd_vma plt_index; - bfd_vma got_offset; + bfd_vma gotplt_offset; Elf_Internal_Rela rela; bfd_byte *loc; @@ -3325,18 +3341,25 @@ elf_s390_finish_dynamic_symbol (bfd *out Current offset - size first entry / entry size. */ plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE; - /* Offset in GOT is PLT index plus GOT headers(3) times 8, - addr & GOT addr. */ - got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; + /* The slots in the .got.plt correspond to the PLT slots in + the same order. */ + gotplt_offset = plt_index * GOT_ENTRY_SIZE; + + /* If .got.plt comes first it needs to contain the 3 header + entries. */ + if (!s390_gotplt_after_got_p (info)) + gotplt_offset += 3 * GOT_ENTRY_SIZE; /* Fill in the blueprint of a PLT. */ memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry, PLT_ENTRY_SIZE); - /* Fixup the relative address to the GOT entry */ + /* The first instruction in the PLT entry is a LARL loading + the address of the GOT slot. We write the 4 byte + immediate operand of the LARL instruction here. */ bfd_put_32 (output_bfd, (htab->elf.sgotplt->output_section->vma + - htab->elf.sgotplt->output_offset + got_offset + htab->elf.sgotplt->output_offset + gotplt_offset - (htab->elf.splt->output_section->vma + htab->elf.splt->output_offset + h->plt.offset))/2, @@ -3356,12 +3379,12 @@ elf_s390_finish_dynamic_symbol (bfd *out + htab->elf.splt->output_offset + h->plt.offset + 14), - htab->elf.sgotplt->contents + got_offset); + htab->elf.sgotplt->contents + gotplt_offset); /* Fill in the entry in the .rela.plt section. */ rela.r_offset = (htab->elf.sgotplt->output_section->vma + htab->elf.sgotplt->output_offset - + got_offset); + + gotplt_offset); rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT); rela.r_addend = 0; loc = htab->elf.srelplt->contents + plt_index * @@ -3568,8 +3591,8 @@ elf_s390_finish_dynamic_sections (bfd *o continue; case DT_PLTGOT: - s = htab->elf.sgotplt; - dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; + /* DT_PLTGOT matches _GLOBAL_OFFSET_TABLE_ */ + dyn.d_un.d_ptr = s390_got_pointer (info); break; case DT_JMPREL: @@ -3606,10 +3629,11 @@ elf_s390_finish_dynamic_sections (bfd *o /* fill in blueprint for plt 0 entry */ memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry, PLT_FIRST_ENTRY_SIZE); - /* Fixup relative address to start of GOT */ + /* The second instruction in the first PLT entry is a LARL + loading the GOT pointer. Fill in the LARL immediate + address. */ bfd_put_32 (output_bfd, - (htab->elf.sgotplt->output_section->vma - + htab->elf.sgotplt->output_offset + (s390_got_pointer (info) - htab->elf.splt->output_section->vma - htab->elf.splt->output_offset - 6)/2, htab->elf.splt->contents + 8); @@ -3619,21 +3643,22 @@ elf_s390_finish_dynamic_sections (bfd *o = PLT_ENTRY_SIZE; } - if (htab->elf.sgotplt) + if (htab->elf.hgot && htab->elf.hgot->root.u.def.section) { /* Fill in the first three entries in the global offset table. */ - if (htab->elf.sgotplt->size > 0) + if (htab->elf.hgot->root.u.def.section->size > 0) { bfd_put_64 (output_bfd, (sdyn == NULL ? (bfd_vma) 0 : sdyn->output_section->vma + sdyn->output_offset), - htab->elf.sgotplt->contents); + htab->elf.hgot->root.u.def.section->contents); /* One entry for shared object struct ptr. */ - bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8); + bfd_put_64 (output_bfd, (bfd_vma) 0, + htab->elf.hgot->root.u.def.section->contents + 8); /* One entry for _dl_runtime_resolve. */ - bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 16); + bfd_put_64 (output_bfd, (bfd_vma) 0, + htab->elf.hgot->root.u.def.section->contents + 16); } - elf_section_data (htab->elf.sgot->output_section) ->this_hdr.sh_entsize = 8; } Index: binutils-2.31/ld/emulparams/elf64_s390.sh =================================================================== --- binutils-2.31.orig/ld/emulparams/elf64_s390.sh 2018-06-24 20:38:57.000000000 +0200 +++ binutils-2.31/ld/emulparams/elf64_s390.sh 2019-01-24 15:07:25.000000000 +0100 @@ -11,9 +11,12 @@ NOP=0x07070707 TEMPLATE_NAME=elf32 GENERATE_SHLIB_SCRIPT=yes GENERATE_PIE_SCRIPT=yes +GENERATE_RELRO_SCRIPT=yes NO_SMALL_DATA=yes EXTRA_EM_FILE=s390 IREL_IN_PLT= +SEPARATE_GOTPLT=0 +test -z "$RELRO" && unset SEPARATE_GOTPLT # Treat a host that matches the target with the possible exception of "x" # in the name as if it were native. Index: binutils-2.31/ld/testsuite/ld-s390/gotreloc_64-1.dd =================================================================== --- binutils-2.31.orig/ld/testsuite/ld-s390/gotreloc_64-1.dd 2018-06-24 20:38:58.000000000 +0200 +++ /dev/null 1970-01-01 00:00:00.000000000 +0000 @@ -1,12 +0,0 @@ -tmpdir/gotreloc_64-1: file format elf64-s390 - -Disassembly of section .text: - -.* <foo>: -.*: c0 10 00 00 00 0e [ ]*larl %r1,.* <bar> -.*: c0 10 00 00 00 0b [ ]*larl %r1,.* <bar> -.*: c4 1d 00 00 08 86 [ ]*lrl %r1,.* <_GLOBAL_OFFSET_TABLE_\+0x18> -.*: 58 10 c0 18 [ ]*l %r1,24\(%r12\) -.*: e3 10 c0 18 00 58 [ ]*ly %r1,24\(%r12\) -.* <bar>: -.*: 00 00 01 23 .long 0x00000123 Index: binutils-2.31/ld/testsuite/ld-s390/gotreloc_64-norelro-1.dd =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ binutils-2.31/ld/testsuite/ld-s390/gotreloc_64-norelro-1.dd 2019-01-24 15:07:25.000000000 +0100 @@ -0,0 +1,12 @@ +tmpdir/gotreloc_64-1: file format elf64-s390 + +Disassembly of section .text: + +.* <foo>: +.*: c0 10 00 00 00 0e [ ]*larl %r1,.* <bar> +.*: c0 10 00 00 00 0b [ ]*larl %r1,.* <bar> +.*: c4 1d 00 00 08 86 [ ]*lrl %r1,.* <_GLOBAL_OFFSET_TABLE_\+0x18> +.*: 58 10 c0 18 [ ]*l %r1,24\(%r12\) +.*: e3 10 c0 18 00 58 [ ]*ly %r1,24\(%r12\) +.* <bar>: +.*: 00 00 01 23 .long 0x00000123 Index: binutils-2.31/ld/testsuite/ld-s390/gotreloc_64-relro-1.dd =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ binutils-2.31/ld/testsuite/ld-s390/gotreloc_64-relro-1.dd 2019-01-24 15:07:25.000000000 +0100 @@ -0,0 +1,12 @@ +tmpdir/gotreloc_64-1: file format elf64-s390 + +Disassembly of section .text: + +.* <foo>: +.*: c0 10 00 00 00 0e [ ]*larl %r1,.* <bar> +.*: c0 10 00 00 00 0b [ ]*larl %r1,.* <bar> +.*: c4 1d 00 00 0f 1a [ ]*lrl %r1,.* <_GLOBAL_OFFSET_TABLE_\+0x18> +.*: 58 10 c0 18 [ ]*l %r1,24\(%r12\) +.*: e3 10 c0 18 00 58 [ ]*ly %r1,24\(%r12\) +.* <bar>: +.*: 00 00 01 23 .long 0x00000123 Index: binutils-2.31/ld/testsuite/ld-s390/s390.exp =================================================================== --- binutils-2.31.orig/ld/testsuite/ld-s390/s390.exp 2018-06-24 20:38:58.000000000 +0200 +++ binutils-2.31/ld/testsuite/ld-s390/s390.exp 2019-01-24 15:07:25.000000000 +0100 @@ -70,10 +70,15 @@ set s390xtests { {{readelf -WSsrl tlsbin_64.rd} {objdump -dzrj.text tlsbin_64.dd} {objdump -sj.got tlsbin_64.sd} {objdump -sj.tdata tlsbin_64.td}} "tlsbin_64"} - {"GOT: symbol address load from got to larl" - "-shared -melf64_s390 --hash-style=sysv --version-script=gotreloc-1.ver" "" + {"GOT: norelro symbol address load from got to larl" + "-shared -melf64_s390 -z norelro --hash-style=sysv --version-script=gotreloc-1.ver" "" "-m64" {gotreloc-1.s} - {{objdump -dzrj.text gotreloc_64-1.dd}} + {{objdump -dzrj.text gotreloc_64-norelro-1.dd}} + "gotreloc_64-1"} + {"GOT: relro symbol address load from got to larl" + "-shared -melf64_s390 -z relro --hash-style=sysv --version-script=gotreloc-1.ver" "" + "-m64" {gotreloc-1.s} + {{objdump -dzrj.text gotreloc_64-relro-1.dd}} "gotreloc_64-1"} {"PLT: offset test" "-shared -m elf64_s390 -dT pltoffset-1.ld" "" Index: binutils-2.31/ld/emultempl/elf32.em =================================================================== --- binutils-2.31.orig/ld/emultempl/elf32.em 2019-01-24 15:07:25.000000000 +0100 +++ binutils-2.31/ld/emultempl/elf32.em 2019-01-24 15:07:25.000000000 +0100 @@ -2461,17 +2461,41 @@ echo ' && link_info.combrelo echo ' && link_info.relro' >> e${EMULATION_NAME}.c echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c sed $sc ldscripts/${EMULATION_NAME}.xdw >> e${EMULATION_NAME}.c +if test -n "$GENERATE_RELRO_SCRIPT" ; then +echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c +echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c +echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c +echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c +sed $sc ldscripts/${EMULATION_NAME}.xdceo >> e${EMULATION_NAME}.c +fi echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c echo ' && link_info.combreloc) return' >> e${EMULATION_NAME}.c sed $sc ldscripts/${EMULATION_NAME}.xdce >> e${EMULATION_NAME}.c +if test -n "$GENERATE_RELRO_SCRIPT" ; then +echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c +echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c +echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c +sed $sc ldscripts/${EMULATION_NAME}.xdco >> e${EMULATION_NAME}.c +fi echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c echo ' && link_info.combreloc) return' >> e${EMULATION_NAME}.c sed $sc ldscripts/${EMULATION_NAME}.xdc >> e${EMULATION_NAME}.c +if test -n "$GENERATE_RELRO_SCRIPT" ; then +echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c +echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c +echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c +sed $sc ldscripts/${EMULATION_NAME}.xdeo >> e${EMULATION_NAME}.c +fi fi echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c echo ' && link_info.separate_code) return' >> e${EMULATION_NAME}.c sed $sc ldscripts/${EMULATION_NAME}.xde >> e${EMULATION_NAME}.c +if test -n "$GENERATE_RELRO_SCRIPT" ; then +echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c +echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c +sed $sc ldscripts/${EMULATION_NAME}.xdo >> e${EMULATION_NAME}.c +fi echo ' ; else if (bfd_link_pie (&link_info)) return' >> e${EMULATION_NAME}.c sed $sc ldscripts/${EMULATION_NAME}.xd >> e${EMULATION_NAME}.c fi @@ -2487,17 +2511,41 @@ echo ' && link_info.combrelo echo ' && link_info.relro' >> e${EMULATION_NAME}.c echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c sed $sc ldscripts/${EMULATION_NAME}.xsw >> e${EMULATION_NAME}.c +if test -n "$GENERATE_RELRO_SCRIPT" ; then +echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c +echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c +echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c +echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c +sed $sc ldscripts/${EMULATION_NAME}.xsceo >> e${EMULATION_NAME}.c +fi echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c echo ' && link_info.separate_code) return' >> e${EMULATION_NAME}.c sed $sc ldscripts/${EMULATION_NAME}.xsce >> e${EMULATION_NAME}.c +if test -n "$GENERATE_RELRO_SCRIPT" ; then +echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c +echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c +echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c +sed $sc ldscripts/${EMULATION_NAME}.xsco >> e${EMULATION_NAME}.c +fi echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c echo ' && link_info.combreloc) return' >> e${EMULATION_NAME}.c sed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.c +if test -n "$GENERATE_RELRO_SCRIPT" ; then +echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c +echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c +echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c +sed $sc ldscripts/${EMULATION_NAME}.xseo >> e${EMULATION_NAME}.c +fi fi echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c echo ' && link_info.separate_code) return' >> e${EMULATION_NAME}.c sed $sc ldscripts/${EMULATION_NAME}.xse >> e${EMULATION_NAME}.c +if test -n "$GENERATE_RELRO_SCRIPT" ; then +echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c +echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c +sed $sc ldscripts/${EMULATION_NAME}.xso >> e${EMULATION_NAME}.c +fi echo ' ; else if (bfd_link_dll (&link_info)) return' >> e${EMULATION_NAME}.c sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c fi @@ -2510,14 +2558,34 @@ echo ' ; else if (link_info.combreloc' echo ' && link_info.relro' >> e${EMULATION_NAME}.c echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c sed $sc ldscripts/${EMULATION_NAME}.xw >> e${EMULATION_NAME}.c +if test -n "$GENERATE_RELRO_SCRIPT" ; then +echo ' ; else if (link_info.combreloc' >> e${EMULATION_NAME}.c +echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c +echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c +sed $sc ldscripts/${EMULATION_NAME}.xceo >> e${EMULATION_NAME}.c +fi echo ' ; else if (link_info.combreloc' >> e${EMULATION_NAME}.c echo ' && link_info.separate_code) return' >> e${EMULATION_NAME}.c sed $sc ldscripts/${EMULATION_NAME}.xce >> e${EMULATION_NAME}.c +if test -n "$GENERATE_RELRO_SCRIPT" ; then +echo ' ; else if (link_info.combreloc' >> e${EMULATION_NAME}.c +echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c +sed $sc ldscripts/${EMULATION_NAME}.xco >> e${EMULATION_NAME}.c +fi echo ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.c sed $sc ldscripts/${EMULATION_NAME}.xc >> e${EMULATION_NAME}.c fi -echo ' ; else if (link_info.separate_code) return' >> e${EMULATION_NAME}.c +if test -n "$GENERATE_RELRO_SCRIPT" ; then +echo ' ; else if (link_info.separate_code' >> e${EMULATION_NAME}.c +echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c +sed $sc ldscripts/${EMULATION_NAME}.xeo >> e${EMULATION_NAME}.c +fi +echo ' ; else if (link_info.separate_code) return' >> e${EMULATION_NAME}.c sed $sc ldscripts/${EMULATION_NAME}.xe >> e${EMULATION_NAME}.c +if test -n "$GENERATE_RELRO_SCRIPT" ; then +echo ' ; else if (link_info.relro) return' >> e${EMULATION_NAME}.c +sed $sc ldscripts/${EMULATION_NAME}.xo >> e${EMULATION_NAME}.c +fi echo ' ; else return' >> e${EMULATION_NAME}.c sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c echo '; }' >> e${EMULATION_NAME}.c @@ -2556,6 +2624,21 @@ fragment <<EOF else return "ldscripts/${EMULATION_NAME}.xdw"; } +EOF +if test -n "$GENERATE_RELRO_SCRIPT" ; then +fragment <<EOF + else if (bfd_link_pie (&link_info) + && link_info.combreloc + && link_info.relro) + { + if (link_info.separate_code) + return "ldscripts/${EMULATION_NAME}.xdceo"; + else + return "ldscripts/${EMULATION_NAME}.xdco"; + } +EOF +fi +fragment <<EOF else if (bfd_link_pie (&link_info) && link_info.combreloc) { @@ -2566,6 +2649,18 @@ fragment <<EOF } EOF fi +if test -n "$GENERATE_RELRO_SCRIPT" ; then +fragment <<EOF + else if (bfd_link_pie (&link_info) + && link_info.relro) + { + if (link_info.separate_code) + return "ldscripts/${EMULATION_NAME}.xdeo"; + else + return "ldscripts/${EMULATION_NAME}.xdo"; + } +EOF +fi fragment <<EOF else if (bfd_link_pie (&link_info)) { @@ -2587,6 +2682,21 @@ fragment <<EOF else return "ldscripts/${EMULATION_NAME}.xsw"; } +EOF +if test -n "$GENERATE_RELRO_SCRIPT" ; then +fragment <<EOF + else if (bfd_link_dll (&link_info) + && link_info.combreloc + && link_info.relro) + { + if (link_info.separate_code) + return "ldscripts/${EMULATION_NAME}.xsceo"; + else + return "ldscripts/${EMULATION_NAME}.xsco"; + } +EOF +fi +fragment <<EOF else if (bfd_link_dll (&link_info) && link_info.combreloc) { if (link_info.separate_code) @@ -2596,6 +2706,18 @@ fragment <<EOF } EOF fi +if test -n "$GENERATE_RELRO_SCRIPT" ; then +fragment <<EOF + else if (bfd_link_dll (&link_info) + && link_info.relro) + { + if (link_info.separate_code) + return "ldscripts/${EMULATION_NAME}.xseo"; + else + return "ldscripts/${EMULATION_NAME}.xso"; + } +EOF +fi fragment <<EOF else if (bfd_link_dll (&link_info)) { @@ -2616,6 +2738,20 @@ fragment <<EOF else return "ldscripts/${EMULATION_NAME}.xw"; } +EOF +if test -n "$GENERATE_RELRO_SCRIPT" ; then +fragment <<EOF + else if (link_info.combreloc + && link_info.relro) + { + if (link_info.separate_code) + return "ldscripts/${EMULATION_NAME}.xceo"; + else + return "ldscripts/${EMULATION_NAME}.xco"; + } +EOF +fi +fragment <<EOF else if (link_info.combreloc) { if (link_info.separate_code) @@ -2625,6 +2761,17 @@ fragment <<EOF } EOF fi +if test -n "$GENERATE_RELRO_SCRIPT" ; then +fragment <<EOF + else if (link_info.relro) + { + if (link_info.separate_code) + return "ldscripts/${EMULATION_NAME}.xeo"; + else + return "ldscripts/${EMULATION_NAME}.xo"; + } +EOF +fi fragment <<EOF else { Index: binutils-2.31/ld/genscripts.sh =================================================================== --- binutils-2.31.orig/ld/genscripts.sh 2018-06-24 20:38:57.000000000 +0200 +++ binutils-2.31/ld/genscripts.sh 2019-01-24 15:07:25.000000000 +0100 @@ -59,11 +59,42 @@ # sun3.xn [used when the linker is invoked with "-n"] # sun3.xr [used when the linker is invoked with "-r"] # sun3.xu [used when the linker is invoked with "-Ur"] -# and maybe: -# sun3.xc [used when the linker is invoked with "-z combreloc"] -# sun3.xsc [used when the linker is invoked with "--shared"] -# sun3.xdc [used when the linker is invoked with "-pie"] -# sun3.xa [used when the linker is invoked with "--enable-auto-import"] +# +# depending on platform specific settings linker scripts with the +# following suffixes might be generated as well: +# +# xdwe: -pie -z combreloc -z separate-code -z now +# xdw: -pie -z combreloc -z relro -z now +# xdceo: -pie -z combreloc -z separate-code -z relro +# xdce: -pie -z combreloc -z separate-code +# xdco: -pie -z combreloc -z relro +# xdc: -pie -z combreloc +# xdeo: -pie -z separate-code -z relro +# xde: -pie -z separate-code +# xdo: -pie -z relro +# xd: -pie +# +# xswe: -shared -z combreloc -z separate-code -z now +# xsw: -shared -z combreloc -z relro -z now +# xsceo: -shared -z combreloc -z separate-code -z relro +# xsce: -shared -z combreloc -z separate-code +# xsco: -shared -z combreloc -z relro +# xsc: -shared -z combreloc +# xseo: -shared -z separate-code -z relro +# xse: -shared -z separate-code +# xso: -shared -z relro +# xs: -shared +# +# xwe: -z combreloc -z separate-code -z now +# xw: -z combreloc -z relro -z now +# xceo: -z combreloc -z separate-code -z relro +# xce: -z combreloc -z separate-code +# xco: -z combreloc -z relro +# xc: -z combreloc +# xeo: -z separate-code -z relro +# xe: -z separate-code +# xo: -z relro +# # # It also produced the C source file: # @@ -306,6 +337,20 @@ LD_FLAG=textonly . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xe +if test -n "$GENERATE_RELRO_SCRIPT"; then + LD_FLAG= + RELRO=" " + ( echo "/* Script for -z relo: generate normal executables with separate code segment */" + . ${CUSTOMIZER_SCRIPT} + . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc + ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xo + LD_FLAG=textonly + ( echo "/* Script for -z separate-code -z relo: generate normal executables with separate code segment */" + . ${CUSTOMIZER_SCRIPT} + . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc + ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xeo + unset RELRO +fi LD_FLAG=n DATA_ALIGNMENT=${DATA_ALIGNMENT_n} ( echo "/* Script for -n: mix text and data on same page */" @@ -353,6 +398,25 @@ if test -n "$GENERATE_COMBRELOC_SCRIPT"; rm -f ${COMBRELOC} COMBRELOC= unset RELRO_NOW + if test -n "$GENERATE_RELRO_SCRIPT"; then + LD_FLAG=c + RELRO=" " + COMBRELOC=ldscripts/${EMULATION_NAME}.xco.tmp + ( echo "/* Script for -z combreloc -z relro: combine and sort reloc sections */" + . ${CUSTOMIZER_SCRIPT} + . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc + ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xco + rm -f ${COMBRELOC} + LD_FLAG=ctextonly + COMBRELOC=ldscripts/${EMULATION_NAME}.xceo.tmp + ( echo "/* Script for -z combreloc -z separate-code -z relro: combine and sort reloc sections */" + . ${CUSTOMIZER_SCRIPT} + . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc + ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xceo + rm -f ${COMBRELOC} + COMBRELOC= + unset RELRO + fi fi if test -n "$GENERATE_SHLIB_SCRIPT"; then @@ -370,6 +434,23 @@ if test -n "$GENERATE_SHLIB_SCRIPT"; the . ${CUSTOMIZER_SCRIPT} . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xse + + if test -n "$GENERATE_RELRO_SCRIPT"; then + RELRO=" " + LD_FLAG=shared + ( + echo "/* Script for ld --shared -z relro: link shared library */" + . ${CUSTOMIZER_SCRIPT} + . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc + ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xso + LD_FLAG=sharedtextonly + ( + echo "/* Script for ld --shared -z relro -z separate-code: link shared library with separate code segment */" + . ${CUSTOMIZER_SCRIPT} + . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc + ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xseo + unset RELRO + fi if test -n "$GENERATE_COMBRELOC_SCRIPT"; then DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}} LD_FLAG=cshared @@ -401,8 +482,27 @@ if test -n "$GENERATE_SHLIB_SCRIPT"; the . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xswe rm -f ${COMBRELOC} - COMBRELOC= unset RELRO_NOW + + if test -n "$GENERATE_RELRO_SCRIPT"; then + LD_FLAG=wshared + RELRO=" " + COMBRELOC=ldscripts/${EMULATION_NAME}.xsco.tmp + ( echo "/* Script for --shared -z combreloc -z relro: shared library, combine & sort relocs with separate code segment */" + . ${CUSTOMIZER_SCRIPT} + . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc + ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xsco + rm -f ${COMBRELOC} + LD_FLAG=wsharedtextonly + COMBRELOC=ldscripts/${EMULATION_NAME}.xsceo.tmp + ( echo "/* Script for --shared -z combreloc -z relro -z separate-code: shared library, combine & sort relocs with separate code segment */" + . ${CUSTOMIZER_SCRIPT} + . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc + ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xsceo + rm -f ${COMBRELOC} + unset RELRO + fi + COMBRELOC= fi unset CREATE_SHLIB fi @@ -422,6 +522,22 @@ if test -n "$GENERATE_PIE_SCRIPT"; then . ${CUSTOMIZER_SCRIPT} . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xde + if test -n "$GENERATE_RELRO_SCRIPT"; then + RELRO=" " + LD_FLAG=pie + ( + echo "/* Script for ld -pie -z relro: link position independent executable */" + . ${CUSTOMIZER_SCRIPT} + . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc + ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xdo + LD_FLAG=pietextonly + ( + echo "/* Script for ld -pie -z relro -z separate-code: link position independent executable with separate code segment */" + . ${CUSTOMIZER_SCRIPT} + . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc + ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xdeo + unset RELRO + fi if test -n "$GENERATE_COMBRELOC_SCRIPT"; then DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}} COMBRELOC=ldscripts/${EMULATION_NAME}.xdc.tmp @@ -453,8 +569,28 @@ if test -n "$GENERATE_PIE_SCRIPT"; then . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xdwe rm -f ${COMBRELOC} - COMBRELOC= unset RELRO_NOW + + if test -n "$GENERATE_RELRO_SCRIPT"; then + LD_FLAG=wpie + RELRO=" " + COMBRELOC=ldscripts/${EMULATION_NAME}.xdco.tmp + ( echo "/* Script for -pie -z combreloc -z relro: position independent executable, combine & sort relocs with separate code segment */" + . ${CUSTOMIZER_SCRIPT} + . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc + ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xdco + rm -f ${COMBRELOC} + LD_FLAG=wpietextonly + COMBRELOC=ldscripts/${EMULATION_NAME}.xdceo.tmp + ( echo "/* Script for -pie -z combreloc -z relro -z separate-code: position independent executable, combine & sort relocs with separate code segment */" + . ${CUSTOMIZER_SCRIPT} + . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc + ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xdceo + rm -f ${COMBRELOC} + + unset RELRO + fi + COMBRELOC= fi unset CREATE_PIE fi
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