Merge "Remove unused mips/mips64 code from the linker."
diff --git a/linker/Android.bp b/linker/Android.bp
index e21ee60..a411a90 100644
--- a/linker/Android.bp
+++ b/linker/Android.bp
@@ -205,22 +205,6 @@
],
}
-filegroup {
- name: "linker_sources_mips",
- srcs: [
- "arch/mips/begin.S",
- "linker_mips.cpp",
- ],
-}
-
-filegroup {
- name: "linker_sources_mips64",
- srcs: [
- "arch/mips64/begin.S",
- "linker_mips.cpp",
- ],
-}
-
cc_defaults {
name: "linker_version_script_overlay",
arch: {
@@ -228,8 +212,6 @@
arm64: { version_script: "linker.generic.map" },
x86: { version_script: "linker.generic.map" },
x86_64: { version_script: "linker.generic.map" },
- mips: { version_script: "linker.generic.map" },
- mips64: { version_script: "linker.generic.map" },
},
}
@@ -257,14 +239,6 @@
srcs: [":linker_sources_x86_64"],
static_libs: ["libgcc_stripped"],
},
- mips: {
- srcs: [":linker_sources_mips"],
- static_libs: ["libgcc_stripped"],
- },
- mips64: {
- srcs: [":linker_sources_mips64"],
- static_libs: ["libgcc_stripped"],
- },
},
// -shared is used to overwrite the -Bstatic and -static flags triggered by enabling
diff --git a/linker/arch/mips/begin.S b/linker/arch/mips/begin.S
deleted file mode 100644
index 1bdd358..0000000
--- a/linker/arch/mips/begin.S
+++ /dev/null
@@ -1,104 +0,0 @@
-/*
- * Copyright (C) 2012 The Android Open Source Project
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- .text
- .balign 16
- .type __start,@function
-
- .ent __start
- .globl __start
- .globl _start
-__start:
-_start:
- .set noreorder
- bal 1f
- nop
-1: .cpload $31
- .set reorder
-
- /* Discover the load address */
- la $t0, 1f
- bal 1f
-1: subu $t0, $ra, $t0
-
-#define DT_PLTGOT 3
-#define DT_MIPS_LOCAL_GOTNO 0x7000000a
-
- /* Search dynamic table for DT_MIPS_LOCAL_GOTNO and DT_PLTGOT values */
- la $t1, _DYNAMIC
- addu $t1, $t0
- li $t3, DT_PLTGOT
- li $t4, DT_MIPS_LOCAL_GOTNO
-0:
- lw $t2, 0($t1)
- beqz $t2, .Lrelocate_local_got
-
- bne $t2, $t3, 1f /* DT_PLTGOT? */
- lw $s0, 4($t1)
- addu $s0, $t0
- b 2f
-
-1: bne $t2, $t4, 1f /* DT_MIPS_LOCAL_GOTNO? */
- lw $s1, 4($t1)
- b 2f
-
-1:
-2: addu $t1, 8
- b 0b
-
-.Lrelocate_local_got:
- /*
- * Relocate the local GOT entries
- * got[0] is address of lazy resolver function
- * got[1] may be used for a GNU extension
- */
-
- addu $s0, 4
- subu $s1, 1
- lw $t1, ($s0)
- bgez $t1, 9f
- addu $s0, 4
- subu $s1, 1
- b 9f
-
-1: lw $t1, ($s0)
- addu $t1, $t0
- sw $t1, ($s0)
- addu $s0, 4
-9: subu $s1, 1
- bgez $s1, 1b
-
- /* call linker_init */
- move $a0, $sp
- addiu $sp, -4*4 /* space for arg saves in linker_init */
- la $t9, __linker_init
- jalr $t9
- move $t9, $v0
- addu $sp, 4*4 /* restore sp */
- j $t9
- .end __start
diff --git a/linker/arch/mips64/begin.S b/linker/arch/mips64/begin.S
deleted file mode 100644
index 60169b4..0000000
--- a/linker/arch/mips64/begin.S
+++ /dev/null
@@ -1,124 +0,0 @@
-/*
- * Copyright (C) 2012 The Android Open Source Project
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <private/bionic_asm.h>
-
-#if (_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABI32)
-#define ELF_DYNSZ 8
-#define ELF_DYN_TAG 0
-#define ELF_DYN_VAL 4
-#define GOTENT_SZ 4
-#else
-#define ELF_DYNSZ 16
-#define ELF_DYN_TAG 0
-#define ELF_DYN_VAL 8
-#define GOTENT_SZ 8
-#endif
-
- .text
- .balign 16
- .type __start,@function
-
- .ent __start
- .globl __start
- .globl _start
-__start:
-_start:
- .set noreorder
- bal 1f
- nop
-1:
-#if (_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABI32)
- .cpload $ra
-#else
- .cpsetup $ra, $0, 1b
-#endif
- .set reorder
-
- /* Discover the load address */
- LA $t0, 1b
- PTR_SUBU $t0, $ra, $t0
-
-#define DT_PLTGOT 3
-#define DT_MIPS_LOCAL_GOTNO 0x7000000a
-
- /* Search dynamic table for DT_MIPS_LOCAL_GOTNO and DT_PLTGOT values */
- LA $t1, _DYNAMIC
- PTR_ADDU $t1, $t0
- LI $t3, DT_PLTGOT
- LI $ta0, DT_MIPS_LOCAL_GOTNO
-0:
- REG_L $t2, ELF_DYN_TAG($t1)
- beqz $t2, .Lrelocate_local_got
-
- bne $t2, $t3, 1f /* DT_PLTGOT? */
- REG_L $s0, ELF_DYN_VAL($t1)
- PTR_ADDU $s0, $t0
- b 2f
-
-1:
- bne $t2, $ta0, 2f /* DT_MIPS_LOCAL_GOTNO? */
- REG_L $s1, ELF_DYN_VAL($t1)
-
-2: PTR_ADDU $t1, ELF_DYNSZ
- b 0b
-
-.Lrelocate_local_got:
- /*
- * Relocate the local GOT entries
- * got[0] is address of lazy resolver function
- * got[1] may be used for a GNU extension
- */
-
- PTR_ADDU $s0, GOTENT_SZ
- SUBU $s1, 1
- PTR_L $t1, ($s0)
- bgez $t1, 9f
- PTR_ADDU $s0, GOTENT_SZ
- SUBU $s1, 1
- b 9f
-
-1: PTR_L $t1, ($s0)
- PTR_ADDU $t1, $t0
- PTR_S $t1, ($s0)
- PTR_ADDU $s0, GOTENT_SZ
-9: SUBU $s1, 1
- bgez $s1, 1b
-
- /* call linker_init */
- move $a0, $sp
-#if (_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABI32)
- PTR_SUBU $sp, 4*REGSZ /* space for arg saves in linker_init */
-#endif
- jal __linker_init
-#if (_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABI32)
- PTR_ADDU $sp, 4*REGSZ /* restore sp */
-#endif
- move $t9, $v0
- j $t9
- .end __start
diff --git a/linker/linker.cpp b/linker/linker.cpp
index 0e68259..03b08b6 100644
--- a/linker/linker.cpp
+++ b/linker/linker.cpp
@@ -2949,25 +2949,15 @@
break;
case DT_PLTGOT:
-#if defined(__mips__)
- // Used by mips and mips64.
- plt_got_ = reinterpret_cast<ElfW(Addr)**>(load_bias + d->d_un.d_ptr);
-#endif
- // Ignore for other platforms... (because RTLD_LAZY is not supported)
+ // Ignored (because RTLD_LAZY is not supported).
break;
case DT_DEBUG:
// Set the DT_DEBUG entry to the address of _r_debug for GDB
// if the dynamic table is writable
-// FIXME: not working currently for N64
-// The flags for the LOAD and DYNAMIC program headers do not agree.
-// The LOAD section containing the dynamic table has been mapped as
-// read-only, but the DYNAMIC header claims it is writable.
-#if !(defined(__mips__) && defined(__LP64__))
if ((dynamic_flags & PF_W) != 0) {
d->d_un.d_val = reinterpret_cast<uintptr_t>(&_r_debug);
}
-#endif
break;
#if defined(USE_RELA)
case DT_RELA:
@@ -3162,41 +3152,7 @@
get_realpath(), reinterpret_cast<void*>(d->d_un.d_val));
}
break;
-#if defined(__mips__)
- case DT_MIPS_RLD_MAP:
- // Set the DT_MIPS_RLD_MAP entry to the address of _r_debug for GDB.
- {
- r_debug** dp = reinterpret_cast<r_debug**>(load_bias + d->d_un.d_ptr);
- *dp = &_r_debug;
- }
- break;
- case DT_MIPS_RLD_MAP_REL:
- // Set the DT_MIPS_RLD_MAP_REL entry to the address of _r_debug for GDB.
- {
- r_debug** dp = reinterpret_cast<r_debug**>(
- reinterpret_cast<ElfW(Addr)>(d) + d->d_un.d_val);
- *dp = &_r_debug;
- }
- break;
- case DT_MIPS_RLD_VERSION:
- case DT_MIPS_FLAGS:
- case DT_MIPS_BASE_ADDRESS:
- case DT_MIPS_UNREFEXTNO:
- break;
-
- case DT_MIPS_SYMTABNO:
- mips_symtabno_ = d->d_un.d_val;
- break;
-
- case DT_MIPS_LOCAL_GOTNO:
- mips_local_gotno_ = d->d_un.d_val;
- break;
-
- case DT_MIPS_GOTSYM:
- mips_gotsym_ = d->d_un.d_val;
- break;
-#endif
// Ignored: "Its use has been superseded by the DF_BIND_NOW flag"
case DT_BIND_NOW:
break;
@@ -3254,12 +3210,6 @@
}
}
-#if defined(__mips__) && !defined(__LP64__)
- if (!mips_check_and_adjust_fp_modes()) {
- return false;
- }
-#endif
-
DEBUG("si->base = %p, si->strtab = %p, si->symtab = %p",
reinterpret_cast<void*>(base), strtab_, symtab_);
diff --git a/linker/linker.h b/linker/linker.h
index 80c11d0..2da1404 100644
--- a/linker/linker.h
+++ b/linker/linker.h
@@ -51,20 +51,6 @@
#define ELFW(what) ELF32_ ## what
#endif
-// mips64 interprets Elf64_Rel structures' r_info field differently.
-// bionic (like other C libraries) has macros that assume regular ELF files,
-// but the dynamic linker needs to be able to load mips64 ELF files.
-#if defined(__mips__) && defined(__LP64__)
-#undef ELF64_R_SYM
-#undef ELF64_R_TYPE
-#undef ELF64_R_INFO
-#define ELF64_R_SYM(info) (((info) >> 0) & 0xffffffff)
-#define ELF64_R_SSYM(info) (((info) >> 32) & 0xff)
-#define ELF64_R_TYPE3(info) (((info) >> 40) & 0xff)
-#define ELF64_R_TYPE2(info) (((info) >> 48) & 0xff)
-#define ELF64_R_TYPE(info) (((info) >> 56) & 0xff)
-#endif
-
#define SUPPORTED_DT_FLAGS_1 (DF_1_NOW | DF_1_GLOBAL | DF_1_NODELETE | DF_1_PIE)
// Class used construct version dependency graph.
diff --git a/linker/linker_common_types.h b/linker/linker_common_types.h
index ae78aa9..276fd66 100644
--- a/linker/linker_common_types.h
+++ b/linker/linker_common_types.h
@@ -33,11 +33,8 @@
#include <android-base/macros.h>
-// TODO(dimitry): move this to linker_defines.h? Unless it is removed by
-// consequent refactoring steps.
-
-// Android uses RELA for aarch64 and x86_64. mips64 still uses REL.
-#if defined(__aarch64__) || defined(__x86_64__)
+// Android uses RELA for LP64.
+#if defined(__LP64__)
#define USE_RELA 1
#endif
diff --git a/linker/linker_mips.cpp b/linker/linker_mips.cpp
deleted file mode 100644
index 71a96e6..0000000
--- a/linker/linker_mips.cpp
+++ /dev/null
@@ -1,334 +0,0 @@
-/*
- * Copyright (C) 2015 The Android Open Source Project
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#if !defined(__LP64__) && __mips_isa_rev >= 5
-#include <sys/prctl.h>
-#endif
-
-#include "linker.h"
-#include "linker_debug.h"
-#include "linker_globals.h"
-#include "linker_phdr.h"
-#include "linker_relocs.h"
-#include "linker_reloc_iterators.h"
-#include "linker_sleb128.h"
-#include "linker_soinfo.h"
-
-template bool soinfo::relocate<plain_reloc_iterator>(const VersionTracker& version_tracker,
- plain_reloc_iterator&& rel_iterator,
- const soinfo_list_t& global_group,
- const soinfo_list_t& local_group);
-
-template bool soinfo::relocate<packed_reloc_iterator<sleb128_decoder>>(
- const VersionTracker& version_tracker,
- packed_reloc_iterator<sleb128_decoder>&& rel_iterator,
- const soinfo_list_t& global_group,
- const soinfo_list_t& local_group);
-
-template <typename ElfRelIteratorT>
-bool soinfo::relocate(const VersionTracker& version_tracker,
- ElfRelIteratorT&& rel_iterator,
- const soinfo_list_t& global_group,
- const soinfo_list_t& local_group) {
- for (size_t idx = 0; rel_iterator.has_next(); ++idx) {
- const auto rel = rel_iterator.next();
-
- if (rel == nullptr) {
- return false;
- }
-
- ElfW(Word) type = ELFW(R_TYPE)(rel->r_info);
- ElfW(Word) sym = ELFW(R_SYM)(rel->r_info);
-
- ElfW(Addr) reloc = static_cast<ElfW(Addr)>(rel->r_offset + load_bias);
- ElfW(Addr) sym_addr = 0;
- const char* sym_name = nullptr;
-
- DEBUG("Processing \"%s\" relocation at index %zd", get_realpath(), idx);
- if (type == R_GENERIC_NONE) {
- continue;
- }
-
- const ElfW(Sym)* s = nullptr;
- soinfo* lsi = nullptr;
-
- if (sym != 0) {
- sym_name = get_string(symtab_[sym].st_name);
- const version_info* vi = nullptr;
-
- if (!lookup_version_info(version_tracker, sym, sym_name, &vi)) {
- return false;
- }
-
- if (!soinfo_do_lookup(this, sym_name, vi, &lsi, global_group, local_group, &s)) {
- return false;
- }
-
- if (s == nullptr) {
- // mips does not support relocation with weak-undefined symbols
- DL_ERR("cannot locate symbol \"%s\" referenced by \"%s\"...",
- sym_name, get_realpath());
- return false;
- } else {
- // We got a definition.
- sym_addr = lsi->resolve_symbol_address(s);
- }
- count_relocation(kRelocSymbol);
- }
-
- switch (type) {
- case R_MIPS_REL32:
-#if defined(__LP64__)
- // MIPS Elf64_Rel entries contain compound relocations
- // We only handle the R_MIPS_NONE|R_MIPS_64|R_MIPS_REL32 case
- if (ELF64_R_TYPE2(rel->r_info) != R_MIPS_64 ||
- ELF64_R_TYPE3(rel->r_info) != R_MIPS_NONE) {
- DL_ERR("Unexpected compound relocation type:%d type2:%d type3:%d @ %p (%zu)",
- type, static_cast<unsigned>(ELF64_R_TYPE2(rel->r_info)),
- static_cast<unsigned>(ELF64_R_TYPE3(rel->r_info)), rel, idx);
- return false;
- }
-#endif
- count_relocation(s == nullptr ? kRelocAbsolute : kRelocRelative);
- MARK(rel->r_offset);
- TRACE_TYPE(RELO, "RELO REL32 %08zx <- %08zx %s", static_cast<size_t>(reloc),
- static_cast<size_t>(sym_addr), sym_name ? sym_name : "*SECTIONHDR*");
- if (s != nullptr) {
- *reinterpret_cast<ElfW(Addr)*>(reloc) += sym_addr;
- } else {
- *reinterpret_cast<ElfW(Addr)*>(reloc) += load_bias;
- }
- break;
- default:
- DL_ERR("unknown reloc type %d @ %p (%zu)", type, rel, idx);
- return false;
- }
- }
- return true;
-}
-
-bool soinfo::mips_relocate_got(const VersionTracker& version_tracker,
- const soinfo_list_t& global_group,
- const soinfo_list_t& local_group) {
- ElfW(Addr)** got = plt_got_;
- if (got == nullptr) {
- return true;
- }
-
- // got[0] is the address of the lazy resolver function.
- // got[1] may be used for a GNU extension.
- // FIXME: maybe this should be in a separate routine?
- if ((flags_ & FLAG_LINKER) == 0) {
- size_t g = 1;
- // Check for the high bit to determine whether to skip got[1]
- if (reinterpret_cast<intptr_t>(got[g]) < 0) {
- g++;
- }
- // Relocate the local GOT entries.
- for (; g < mips_local_gotno_; g++) {
- got[g] = reinterpret_cast<ElfW(Addr)*>(reinterpret_cast<uintptr_t>(got[g]) + load_bias);
- }
- }
-
- // Now for the global GOT entries...
- got = plt_got_ + mips_local_gotno_;
- for (ElfW(Word) sym = mips_gotsym_; sym < mips_symtabno_; sym++, got++) {
- // This is an undefined reference... try to locate it.
- const ElfW(Sym)* local_sym = symtab_ + sym;
- const char* sym_name = get_string(local_sym->st_name);
- soinfo* lsi = nullptr;
- const ElfW(Sym)* s = nullptr;
-
- ElfW(Word) st_visibility = (local_sym->st_other & 0x3);
-
- if (st_visibility == STV_DEFAULT) {
- const version_info* vi = nullptr;
-
- if (!lookup_version_info(version_tracker, sym, sym_name, &vi)) {
- return false;
- }
-
- if (!soinfo_do_lookup(this, sym_name, vi, &lsi, global_group, local_group, &s)) {
- return false;
- }
- } else if (st_visibility == STV_PROTECTED) {
- if (local_sym->st_value == 0) {
- DL_ERR("%s: invalid symbol \"%s\" (PROTECTED/UNDEFINED) ",
- get_realpath(), sym_name);
- return false;
- }
- s = local_sym;
- lsi = this;
- } else {
- DL_ERR("%s: invalid symbol \"%s\" visibility: 0x%x",
- get_realpath(), sym_name, st_visibility);
- return false;
- }
-
- if (s == nullptr) {
- // We only allow an undefined symbol if this is a weak reference.
- if (ELF_ST_BIND(local_sym->st_info) != STB_WEAK) {
- DL_ERR("%s: cannot locate \"%s\"...", get_realpath(), sym_name);
- return false;
- }
- *got = 0;
- } else {
- // FIXME: is this sufficient?
- // For reference see NetBSD link loader
- // http://cvsweb.netbsd.org/bsdweb.cgi/src/libexec/ld.elf_so/arch/mips/mips_reloc.c?rev=1.53&content-type=text/x-cvsweb-markup
- *got = reinterpret_cast<ElfW(Addr)*>(lsi->resolve_symbol_address(s));
- }
- }
- return true;
-}
-
-#if !defined(__LP64__)
-
-// Checks for mips32's various floating point abis.
-// (Mips64 Android has a single floating point abi and doesn't need any checks)
-
-// Linux kernel has declarations similar to the following
-// in <linux>/arch/mips/include/asm/elf.h,
-// but that non-uapi internal header file will never be imported
-// into bionic's kernel headers.
-
-#define PT_MIPS_ABIFLAGS 0x70000003 // is .MIPS.abiflags segment
-
-struct mips_elf_abiflags_v0 {
- uint16_t version; // version of this structure
- uint8_t isa_level, isa_rev, gpr_size, cpr1_size, cpr2_size;
- uint8_t fp_abi; // mips32 ABI variants for floating point
- uint32_t isa_ext, ases, flags1, flags2;
-};
-
-// Bits of flags1:
-#define MIPS_AFL_FLAGS1_ODDSPREG 1 // Uses odd-numbered single-prec fp regs
-
-// Some values of fp_abi: via compiler flag:
-#define MIPS_ABI_FP_ANY 0 // Not tagged or not using any ABIs affected by the differences.
-#define MIPS_ABI_FP_DOUBLE 1 // -mdouble-float
-#define MIPS_ABI_FP_XX 5 // -mfpxx
-#define MIPS_ABI_FP_64A 7 // -mips32r* -mfp64 -mno-odd-spreg
-
-#if __mips_isa_rev >= 5
-static bool mips_fre_mode_on = false; // have set FRE=1 mode for process
-#endif
-
-bool soinfo::mips_check_and_adjust_fp_modes() {
- mips_elf_abiflags_v0* abiflags = nullptr;
- int mips_fpabi;
-
- // Find soinfo's optional .MIPS.abiflags segment
- for (size_t i = 0; i<phnum; ++i) {
- const ElfW(Phdr)& ph = phdr[i];
- if (ph.p_type == PT_MIPS_ABIFLAGS) {
- if (ph.p_filesz < sizeof (mips_elf_abiflags_v0)) {
- DL_ERR("Corrupt PT_MIPS_ABIFLAGS header found \"%s\"", get_realpath());
- return false;
- }
- abiflags = reinterpret_cast<mips_elf_abiflags_v0*>(ph.p_vaddr + load_bias);
- break;
- }
- }
-
- // FP ABI-variant compatibility checks for MIPS o32 ABI
- if (abiflags == nullptr) {
- // Old compilers lack the new abiflags section.
- // These compilers used -mfp32 -mdouble-float -modd-spreg defaults,
- // ie FP32 aka DOUBLE, using odd-numbered single-prec regs
- mips_fpabi = MIPS_ABI_FP_DOUBLE;
- } else {
- mips_fpabi = abiflags->fp_abi;
- if ( (abiflags->flags1 & MIPS_AFL_FLAGS1_ODDSPREG)
- && (mips_fpabi == MIPS_ABI_FP_XX ||
- mips_fpabi == MIPS_ABI_FP_64A ) ) {
- // Android supports fewer cases than Linux
- DL_ERR("Unsupported odd-single-prec FloatPt reg uses in \"%s\"",
- get_realpath());
- return false;
- }
- }
- if (!(mips_fpabi == MIPS_ABI_FP_DOUBLE ||
-#if __mips_isa_rev >= 5
- mips_fpabi == MIPS_ABI_FP_64A ||
-#endif
- mips_fpabi == MIPS_ABI_FP_ANY ||
- mips_fpabi == MIPS_ABI_FP_XX )) {
- DL_ERR("Unsupported MIPS32 FloatPt ABI %d found in \"%s\"",
- mips_fpabi, get_realpath());
- return false;
- }
-
-#if __mips_isa_rev >= 5
- // Adjust process's FR Emulation mode, if needed
- //
- // On Mips R5 & R6, Android runs continuously in FR=1 64bit-fpreg mode.
- // NDK mips32 apps compiled with old compilers generate FP32 code
- // which expects FR=0 32-bit fp registers.
- // NDK mips32 apps compiled with newer compilers generate modeless
- // FPXX code which runs on both FR=0 and FR=1 modes.
- // Android itself is compiled in FP64A which requires FR=1 mode.
- // FP32, FPXX, and FP64A all interlink okay, without dynamic FR mode
- // changes during calls. For details, see
- // http://dmz-portal.mips.com/wiki/MIPS_O32_ABI_-_FR0_and_FR1_Interlinking
- // Processes containing FR32 FR=0 code are run via kernel software assist,
- // which maps all odd-numbered single-precision reg refs onto the
- // upper half of the paired even-numbered double-precision reg.
- // FRE=1 triggers traps to the kernel's emulator on every single-precision
- // fp op (for both odd and even-numbered registers).
- // Turning on FRE=1 traps is done at most once per process, simultanously
- // for all threads of that process, when dlopen discovers FP32 code.
- // The kernel repacks threads' registers when FRE mode is turn on or off.
- // These asynchronous adjustments are wrong if any thread was executing
- // FPXX code using odd-numbered single-precision regs.
- // Current Android compilers default to the -mno-oddspreg option,
- // and this requirement is checked by Android's dlopen.
- // So FRE can always be safely turned on for FP32, anytime.
- // Deferred enhancement: Allow loading of odd-spreg FPXX modules.
-
- if (mips_fpabi == MIPS_ABI_FP_DOUBLE && !mips_fre_mode_on) {
- // Turn on FRE mode, which emulates mode-sensitive FR=0 code on FR=1
- // register files, by trapping to kernel on refs to single-precision regs
- if (prctl(PR_SET_FP_MODE, PR_FP_MODE_FR|PR_FP_MODE_FRE)) {
- DL_ERR("Kernel or cpu failed to set FRE mode required for running \"%s\"",
- get_realpath());
- return false;
- }
- DL_WARN("Using FRE=1 mode to run \"%s\"", get_realpath());
- mips_fre_mode_on = true; // Avoid future redundant mode-switch calls
- // FRE mode is never turned back off.
- // Deferred enhancement:
- // Reset FRE mode when dlclose() removes all FP32 modules
- }
-#else
- // Android runs continuously in FR=0 32bit-fpreg mode.
-#endif // __mips_isa_rev
- return true;
-}
-
-#endif // __LP64___
diff --git a/linker/linker_phdr.cpp b/linker/linker_phdr.cpp
index da2d03c..9b7a461 100644
--- a/linker/linker_phdr.cpp
+++ b/linker/linker_phdr.cpp
@@ -51,8 +51,6 @@
return EM_AARCH64;
#elif defined(__i386__)
return EM_386;
-#elif defined(__mips__)
- return EM_MIPS;
#elif defined(__x86_64__)
return EM_X86_64;
#endif
@@ -204,7 +202,6 @@
if (em == EM_386) return "EM_386";
if (em == EM_AARCH64) return "EM_AARCH64";
if (em == EM_ARM) return "EM_ARM";
- if (em == EM_MIPS) return "EM_MIPS";
if (em == EM_X86_64) return "EM_X86_64";
return "EM_???";
}
diff --git a/linker/linker_relocate.cpp b/linker/linker_relocate.cpp
index 17516e9..72be5f7 100644
--- a/linker/linker_relocate.cpp
+++ b/linker/linker_relocate.cpp
@@ -643,12 +643,6 @@
}
#endif
-#if defined(__mips__)
- if (!mips_relocate_got(version_tracker, global_group, local_group)) {
- return false;
- }
-#endif
-
// Once the tlsdesc_args_ vector's size is finalized, we can write the addresses of its elements
// into the TLSDESC relocations.
#if defined(__aarch64__)
diff --git a/linker/linker_soinfo.h b/linker/linker_soinfo.h
index 3a33949..e1a3c30 100644
--- a/linker/linker_soinfo.h
+++ b/linker/linker_soinfo.h
@@ -191,10 +191,8 @@
uint32_t* bucket_;
uint32_t* chain_;
-#if defined(__mips__) || !defined(__LP64__)
- // This is only used by mips and mips64, but needs to be here for
- // all 32-bit architectures to preserve binary compatibility.
- ElfW(Addr)** plt_got_;
+#if !defined(__LP64__)
+ ElfW(Addr)** unused4; // DO NOT USE, maintained for compatibility
#endif
#if defined(USE_RELA)
@@ -228,16 +226,6 @@
uint32_t* ARM_exidx;
size_t ARM_exidx_count;
private:
-#elif defined(__mips__)
- uint32_t mips_symtabno_;
- uint32_t mips_local_gotno_;
- uint32_t mips_gotsym_;
- bool mips_relocate_got(const VersionTracker& version_tracker,
- const soinfo_list_t& global_group,
- const soinfo_list_t& local_group);
-#if !defined(__LP64__)
- bool mips_check_and_adjust_fp_modes();
-#endif
#endif
size_t ref_count_;
public:
