From: "Ying Huang" <ying.huang@oss.cipunited.com>
To: <elfutils-devel@sourceware.org>
Cc: "Ying Huang" <ying.huang@oss.cipunited.com>
Subject: [PATCH 1/5] strip: Adapt src/strip -o -f on mips
Date: Tue, 11 Apr 2023 16:12:40 +0800 [thread overview]
Message-ID: <20230411081141.1762395-2-ying.huang@oss.cipunited.com> (raw)
In-Reply-To: <20230411081141.1762395-1-ying.huang@oss.cipunited.com>
[-- Attachment #1: Type: text/plain, Size: 22527 bytes --]
From: Ying Huang <ying.huang@oss.cipunited.com>
In mips64 little-endian, r_info consists of four byte fields(contains
three reloc types) and a 32-bit symbol index. In order to adapt
GELF_R_SYM and GELF_R_TYPE, need convert raw data to get correct symbol
index and type.
libelf/elf_getdata.c: Some eu-utils use read-mmap method to map file,
so we need to malloc and memcpy raw data to avoid segment fault. After
modification, the correct value are saved in the malloced memory not in
process address space.
libelf/elf_updata.c: Because we converted the relocation info in mips
order when we call elf_getdata.c, so we need to convert the modified data
in original order bits before writing the data to the file.
---
backends/Makefile.am | 6 ++-
backends/mips_init.c | 49 +++++++++++++++++++++
backends/mips_reloc.def | 93 +++++++++++++++++++++++++++++++++++++++
backends/mips_symbol.c | 62 ++++++++++++++++++++++++++
libebl/eblopenbackend.c | 2 +
libelf/elf.h | 65 +++++++++++++++++++++++++++-
libelf/elf_getdata.c | 96 +++++++++++++++++++++++++++++++++++++++--
libelf/elf_update.c | 53 +++++++++++++++++++++++
8 files changed, 419 insertions(+), 7 deletions(-)
create mode 100644 backends/mips_init.c
create mode 100644 backends/mips_reloc.def
create mode 100644 backends/mips_symbol.c
diff --git a/backends/Makefile.am b/backends/Makefile.am
index f373e5fb..bda1b604 100644
--- a/backends/Makefile.am
+++ b/backends/Makefile.am
@@ -37,7 +37,7 @@ AM_CPPFLAGS += -I$(top_srcdir)/libebl -I$(top_srcdir)/libasm \
noinst_LIBRARIES = libebl_backends.a libebl_backends_pic.a
modules = i386 sh x86_64 ia64 alpha arm aarch64 sparc ppc ppc64 s390 \
- m68k bpf riscv csky loongarch arc
+ m68k bpf riscv csky loongarch arc mips
i386_SRCS = i386_init.c i386_symbol.c i386_corenote.c i386_cfi.c \
i386_retval.c i386_regs.c i386_auxv.c \
@@ -100,12 +100,14 @@ loongarch_SRCS = loongarch_init.c loongarch_symbol.c
arc_SRCS = arc_init.c arc_symbol.c
+mips_SRCS = mips_init.c mips_symbol.c
+
libebl_backends_a_SOURCES = $(i386_SRCS) $(sh_SRCS) $(x86_64_SRCS) \
$(ia64_SRCS) $(alpha_SRCS) $(arm_SRCS) \
$(aarch64_SRCS) $(sparc_SRCS) $(ppc_SRCS) \
$(ppc64_SRCS) $(s390_SRCS) \
$(m68k_SRCS) $(bpf_SRCS) $(riscv_SRCS) $(csky_SRCS) \
- $(loongarch_SRCS) $(arc_SRCS)
+ $(loongarch_SRCS) $(arc_SRCS) $(mips_SRCS)
libebl_backends_pic_a_SOURCES =
am_libebl_backends_pic_a_OBJECTS = $(libebl_backends_a_SOURCES:.c=.os)
diff --git a/backends/mips_init.c b/backends/mips_init.c
new file mode 100644
index 00000000..f70d62e4
--- /dev/null
+++ b/backends/mips_init.c
@@ -0,0 +1,49 @@
+/* Initialization of MIPS specific backend library.
+ Copyright (C) 2023 CIP United Inc.
+ This file is part of elfutils.
+
+ This file is free software; you can redistribute it and/or modify
+ it under the terms of either
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at
+ your option) any later version
+
+ or
+
+ * the GNU General Public License as published by the Free
+ Software Foundation; either version 2 of the License, or (at
+ your option) any later version
+
+ or both in parallel, as here.
+
+ elfutils is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received copies of the GNU General Public License and
+ the GNU Lesser General Public License along with this program. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#define BACKEND mips_
+#define RELOC_PREFIX R_MIPS_
+#include "libebl_CPU.h"
+
+/* This defines the common reloc hooks based on mips_reloc.def. */
+#include "common-reloc.c"
+
+Ebl *
+mips_init (Elf *elf __attribute__ ((unused)),
+ GElf_Half machine __attribute__ ((unused)),
+ Ebl *eh)
+{
+ /* We handle it. */
+ mips_init_reloc (eh);
+ HOOK (eh, reloc_simple_type);
+ return eh;
+}
diff --git a/backends/mips_reloc.def b/backends/mips_reloc.def
new file mode 100644
index 00000000..8cb66a54
--- /dev/null
+++ b/backends/mips_reloc.def
@@ -0,0 +1,93 @@
+/* List the relocation types for MIPS. -*- C -*-
+ Copyright (C) 2023 CIP United Inc.
+ This file is part of elfutils.
+
+ This file is free software; you can redistribute it and/or modify
+ it under the terms of either
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at
+ your option) any later version
+
+ or
+
+ * the GNU General Public License as published by the Free
+ Software Foundation; either version 2 of the License, or (at
+ your option) any later version
+
+ or both in parallel, as here.
+
+ elfutils is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received copies of the GNU General Public License and
+ the GNU Lesser General Public License along with this program. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+/* NAME, REL|EXEC|DYN */
+
+
+RELOC_TYPE (NONE, REL|EXEC|DYN)
+RELOC_TYPE (16, REL|EXEC|DYN)
+RELOC_TYPE (32, REL)
+RELOC_TYPE (REL32, REL|EXEC|DYN)
+RELOC_TYPE (26, REL|DYN)
+RELOC_TYPE (HI16, REL)
+RELOC_TYPE (LO16, REL|EXEC|DYN)
+RELOC_TYPE (GPREL16, REL|EXEC|DYN)
+RELOC_TYPE (LITERAL, REL|EXEC|DYN)
+RELOC_TYPE (GOT16, REL|EXEC|DYN)
+RELOC_TYPE (PC16, REL)
+RELOC_TYPE (CALL16, REL)
+RELOC_TYPE (GPREL32, REL)
+RELOC_TYPE (SHIFT5, REL)
+RELOC_TYPE (SHIFT6, REL)
+RELOC_TYPE (64, REL)
+RELOC_TYPE (GOT_DISP, REL)
+RELOC_TYPE (GOT_PAGE, REL)
+RELOC_TYPE (GOT_OFST, REL)
+RELOC_TYPE (GOT_HI16, REL)
+RELOC_TYPE (GOT_LO16, REL)
+RELOC_TYPE (SUB, REL)
+RELOC_TYPE (INSERT_A, REL)
+RELOC_TYPE (INSERT_B, REL)
+RELOC_TYPE (DELETE, REL)
+RELOC_TYPE (HIGHER, REL)
+RELOC_TYPE (HIGHEST, REL)
+RELOC_TYPE (CALL_HI16, REL)
+RELOC_TYPE (CALL_LO16, REL)
+RELOC_TYPE (SCN_DISP, REL)
+RELOC_TYPE (REL16, REL)
+RELOC_TYPE (ADD_IMMEDIATE, REL)
+RELOC_TYPE (PJUMP, REL)
+RELOC_TYPE (RELGOT, REL)
+RELOC_TYPE (JALR, REL)
+RELOC_TYPE (TLS_DTPMOD32, DYN)
+RELOC_TYPE (TLS_DTPREL32, REL)
+RELOC_TYPE (TLS_DTPMOD64, DYN)
+RELOC_TYPE (TLS_DTPREL64, REL)
+RELOC_TYPE (TLS_GD, REL)
+RELOC_TYPE (TLS_LDM, REL)
+RELOC_TYPE (TLS_DTPREL_HI16, REL)
+RELOC_TYPE (TLS_DTPREL_LO16, REL)
+RELOC_TYPE (TLS_GOTTPREL, REL)
+RELOC_TYPE (TLS_TPREL32, REL)
+RELOC_TYPE (TLS_TPREL64, REL)
+RELOC_TYPE (TLS_TPREL_HI16, REL)
+RELOC_TYPE (TLS_TPREL_LO16, REL)
+RELOC_TYPE (GLOB_DAT, REL)
+RELOC_TYPE (PC21_S2, REL)
+RELOC_TYPE (PC26_S2, REL)
+RELOC_TYPE (PC18_S3, REL)
+RELOC_TYPE (PC19_S2, REL)
+RELOC_TYPE (PCHI16, REL)
+RELOC_TYPE (PCLO16, REL)
+RELOC_TYPE (COPY, REL)
+RELOC_TYPE (JUMP_SLOT, REL)
+RELOC_TYPE (PC32, REL)
+RELOC_TYPE (EH, REL)
+RELOC_TYPE (GNU_REL16_S2, REL)
+RELOC_TYPE (GNU_VTINHERIT, REL)
+RELOC_TYPE (GNU_VTENTRY, REL)
diff --git a/backends/mips_symbol.c b/backends/mips_symbol.c
new file mode 100644
index 00000000..4f1bd3e6
--- /dev/null
+++ b/backends/mips_symbol.c
@@ -0,0 +1,62 @@
+/* MIPS specific symbolic name handling.
+ Copyright (C) 2023 CIP United Inc.
+ This file is part of elfutils.
+
+ This file is free software; you can redistribute it and/or modify
+ it under the terms of either
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at
+ your option) any later version
+
+ or
+
+ * the GNU General Public License as published by the Free
+ Software Foundation; either version 2 of the License, or (at
+ your option) any later version
+
+ or both in parallel, as here.
+
+ elfutils is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received copies of the GNU General Public License and
+ the GNU Lesser General Public License along with this program. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <system.h>
+
+#include <elf.h>
+#include <stddef.h>
+#include <string.h>
+#include <stdio.h>
+#define BACKEND mips_
+#include "libebl_CPU.h"
+#include "libelfP.h"
+/* Check for the simple reloc types. */
+Elf_Type
+mips_reloc_simple_type (Ebl *ebl, int type,
+ int *addsub __attribute__ ((unused)))
+{
+ int typeNew = type;
+ if(ebl->elf->class == ELFCLASS64)
+ typeNew = ELF64_MIPS_R_TYPE(type);
+ switch (typeNew)
+ {
+ case R_MIPS_64:
+ return ELF_T_XWORD;
+ case R_MIPS_32:
+ return ELF_T_WORD;
+ case R_MIPS_16:
+ return ELF_T_HALF;
+
+ default:
+ return ELF_T_NUM;
+ }
+}
diff --git a/libebl/eblopenbackend.c b/libebl/eblopenbackend.c
index 084a1544..a5f7467a 100644
--- a/libebl/eblopenbackend.c
+++ b/libebl/eblopenbackend.c
@@ -57,6 +57,7 @@ Ebl *riscv_init (Elf *, GElf_Half, Ebl *);
Ebl *csky_init (Elf *, GElf_Half, Ebl *);
Ebl *loongarch_init (Elf *, GElf_Half, Ebl *);
Ebl *arc_init (Elf *, GElf_Half, Ebl *);
+Ebl *mips_init (Elf *, GElf_Half, Ebl *);
/* This table should contain the complete list of architectures as far
as the ELF specification is concerned. */
@@ -154,6 +155,7 @@ static const struct
{ csky_init, "elf_csky", "csky", 4, EM_CSKY, ELFCLASS32, ELFDATA2LSB },
{ loongarch_init, "elf_loongarch", "loongarch", 9, EM_LOONGARCH, ELFCLASS64, ELFDATA2LSB },
{ arc_init, "elf_arc", "arc", 3, EM_ARCV2, ELFCLASS32, ELFDATA2LSB },
+ { mips_init, "elf_mips", "mips", 4, EM_MIPS, 0, 0 },
};
#define nmachines (sizeof (machines) / sizeof (machines[0]))
diff --git a/libelf/elf.h b/libelf/elf.h
index 4bc0e429..aa903837 100644
--- a/libelf/elf.h
+++ b/libelf/elf.h
@@ -678,6 +678,9 @@ typedef Elf64_Xword Elf64_Relr;
#define ELF64_R_SYM(i) ((i) >> 32)
#define ELF64_R_TYPE(i) ((i) & 0xffffffff)
+#define ELF64_MIPS_R_TYPE(i) ((i) & 0xff)
+#define ELF64_MIPS_R_TYPE2(i) (((i) >> 8) & 0xff)
+#define ELF64_MIPS_R_TYPE3(i) (((i) >> 16) & 0xff)
#define ELF64_R_INFO(sym,type) ((((Elf64_Xword) (sym)) << 32) + (type))
/* Program segment header. */
@@ -1927,11 +1930,69 @@ typedef struct
#define R_MIPS_TLS_TPREL_HI16 49 /* TP-relative offset, high 16 bits */
#define R_MIPS_TLS_TPREL_LO16 50 /* TP-relative offset, low 16 bits */
#define R_MIPS_GLOB_DAT 51
+#define R_MIPS_PC21_S2 60
+/* copy binutils-2.34/elfcpp/mips.h +102 */
+#define R_MIPS_PC26_S2 61
+#define R_MIPS_PC18_S3 62
+#define R_MIPS_PC19_S2 63
+#define R_MIPS_PCHI16 64
+#define R_MIPS_PCLO16 65
+#define R_MIPS16_26 100
+#define R_MIPS16_GPREL 101
+#define R_MIPS16_GOT16 102
+#define R_MIPS16_CALL16 103
+#define R_MIPS16_HI16 104
+#define R_MIPS16_LO16 105
+#define R_MIPS16_TLS_GD 106
+#define R_MIPS16_TLS_LDM 107
+#define R_MIPS16_TLS_DTPREL_HI16 108
+#define R_MIPS16_TLS_DTPREL_LO16 109
+#define R_MIPS16_TLS_GOTTPREL 110
+#define R_MIPS16_TLS_TPREL_HI16 111
+#define R_MIPS16_TLS_TPREL_LO16 112
+#define R_MIPS16_PC16_S1 113
#define R_MIPS_COPY 126
#define R_MIPS_JUMP_SLOT 127
+#define R_MIPS_RELATIVE 128
+#define R_MICROMIPS_26_S1 133
+#define R_MICROMIPS_HI16 134
+#define R_MICROMIPS_LO16 135
+#define R_MICROMIPS_GPREL16 136
+#define R_MICROMIPS_LITERAL 137
+#define R_MICROMIPS_GOT16 138
+#define R_MICROMIPS_PC7_S1 139
+#define R_MICROMIPS_PC10_S1 140
+#define R_MICROMIPS_PC16_S1 141
+#define R_MICROMIPS_CALL16 142
+#define R_MICROMIPS_GOT_DISP 145
+#define R_MICROMIPS_GOT_PAGE 146
+#define R_MICROMIPS_GOT_OFST 147
+#define R_MICROMIPS_GOT_HI16 148
+#define R_MICROMIPS_GOT_LO16 149
+#define R_MICROMIPS_SUB 150
+#define R_MICROMIPS_HIGHER 151
+#define R_MICROMIPS_HIGHEST 152
+#define R_MICROMIPS_CALL_HI16 153
+#define R_MICROMIPS_CALL_LO16 154
+#define R_MICROMIPS_SCN_DISP 155
+#define R_MICROMIPS_JALR 156
+#define R_MICROMIPS_HI0_LO16 157
+#define R_MICROMIPS_TLS_GD 162
+#define R_MICROMIPS_TLS_LDM 163
+#define R_MICROMIPS_TLS_DTPREL_HI16 164
+#define R_MICROMIPS_TLS_DTPREL_LO16 165
+#define R_MICROMIPS_TLS_GOTTPREL 166
+#define R_MICROMIPS_TLS_TPREL_HI16 169
+#define R_MICROMIPS_TLS_TPREL_LO16 170
+#define R_MICROMIPS_GPREL7_S2 172
+#define R_MICROMIPS_PC23_S2 173
+#define R_MIPS_PC32 248
+#define R_MIPS_EH 249
+#define R_MIPS_GNU_REL16_S2 250
+#define R_MIPS_GNU_VTINHERIT 253
+#define R_MIPS_GNU_VTENTRY 254
/* Keep this the last entry. */
-#define R_MIPS_NUM 128
-
+#define R_MIPS_NUM 255
/* Legal values for p_type field of Elf32_Phdr. */
#define PT_MIPS_REGINFO 0x70000000 /* Register usage information. */
diff --git a/libelf/elf_getdata.c b/libelf/elf_getdata.c
index 5ebd270f..80f91124 100644
--- a/libelf/elf_getdata.c
+++ b/libelf/elf_getdata.c
@@ -139,13 +139,38 @@ convert_data (Elf_Scn *scn, int eclass,
int data, size_t size, Elf_Type type)
{
const size_t align = __libelf_type_align (eclass, type);
+ GElf_Shdr shdr_mem;
+ GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
+ GElf_Ehdr ehdr_mem;
+ GElf_Ehdr *ehdr = gelf_getehdr (scn->elf, &ehdr_mem);
/* Do we need to convert the data and/or adjust for alignment? */
if (data == MY_ELFDATA || type == ELF_T_BYTE)
{
if (((((size_t) (char *) scn->rawdata_base)) & (align - 1)) == 0)
- /* No need to copy, we can use the raw data. */
- scn->data_base = scn->rawdata_base;
+ {
+ /* In order to adapt macro GELF_R_SYM and GELF_R_TYPE on mips64, need to convert
+ relocation info(raw data). Some eu-utils use read-mmap method to map file, so
+ we need to malloc and memcpy raw data to avoid segment fault. After modification,
+ the correct value are saved in the malloced memory not in process address space. */
+ if (shdr != NULL && (shdr->sh_type == SHT_RELA || shdr->sh_type == SHT_REL) &&
+ scn->elf->class == ELFCLASS64 && ehdr != NULL &&
+ ehdr->e_machine == EM_MIPS && ehdr->e_ident[EI_DATA] == ELFDATA2LSB)
+ {
+ scn->data_base = malloc (size);
+ if (scn->data_base == NULL)
+ {
+ __libelf_seterrno (ELF_E_NOMEM);
+ return;
+ }
+
+ /* The copy will be appropriately aligned for direct access. */
+ memcpy (scn->data_base, scn->rawdata_base, size);
+ }
+ else
+ /* No need to copy, we can use the raw data. */
+ scn->data_base = scn->rawdata_base;
+ }
else
{
scn->data_base = malloc (size);
@@ -174,7 +199,28 @@ convert_data (Elf_Scn *scn, int eclass,
function to directly access the data elements. */
char *rawdata_source;
if (((((size_t) (char *) scn->rawdata_base)) & (align - 1)) == 0)
- rawdata_source = scn->rawdata_base;
+ {
+ /* In order to adapt macro GELF_R_SYM and GELF_R_TYPE on mips64, need to convert
+ relocation info(raw data). Some eu-utils use read-mmap method to map file, so
+ we need to malloc and memcpy raw data to avoid segment fault. After modification,
+ the correct value are saved in the malloced memory not in process address space. */
+ if (shdr != NULL && (shdr->sh_type == SHT_RELA || shdr->sh_type == SHT_REL) &&
+ scn->elf->class == ELFCLASS64 && ehdr != NULL &&
+ ehdr->e_machine == EM_MIPS && ehdr->e_ident[EI_DATA] == ELFDATA2LSB)
+ {
+ rawdata_source = malloc (size);
+ if (rawdata_source == NULL)
+ {
+ __libelf_seterrno (ELF_E_NOMEM);
+ return;
+ }
+
+ /* The copy will be appropriately aligned for direct access. */
+ memcpy (rawdata_source, scn->rawdata_base, size);
+ }
+ else
+ rawdata_source = scn->rawdata_base;
+ }
else
{
rawdata_source = malloc (size);
@@ -205,6 +251,50 @@ convert_data (Elf_Scn *scn, int eclass,
scn->data_list.data.d.d_version = scn->rawdata.d.d_version;
scn->data_list.data.s = scn;
+
+ /* In mips64 little-endian, r_info consists of four byte fields(contains
+ three reloc types) and a 32-bit symbol index. In order to adapt
+ GELF_R_SYM and GELF_R_TYPE, need to convert r_info to get correct symbol
+ index and type. */
+ if (shdr != NULL && (shdr->sh_type == SHT_RELA || shdr->sh_type == SHT_REL) &&
+ scn->elf->class == ELFCLASS64 &&
+ ehdr != NULL && ehdr->e_machine == EM_MIPS && ehdr->e_ident[EI_DATA] == ELFDATA2LSB)
+ {
+ if (shdr->sh_type == SHT_REL)
+ {
+ size_t sh_entsize = gelf_fsize (scn->elf, ELF_T_REL, 1, EV_CURRENT);
+ int nentries = shdr->sh_size / sh_entsize;
+ for (int cnt = 0; cnt < nentries; ++cnt)
+ {
+ Elf_Data_Scn *data_scn = (Elf_Data_Scn *) &scn->data_list.data.d;
+ Elf64_Rel *value = &((Elf64_Rel *) data_scn->d.d_buf)[cnt];
+ Elf64_Xword info = value->r_info;
+ value->r_info = (((info & 0xffffffff) << 32)
+ | ((info >> 56) & 0xff)
+ | ((info >> 40) & 0xff00)
+ | ((info >> 24) & 0xff0000)
+ | ((info >> 8) & 0xff000000));
+ ((Elf64_Rel *) data_scn->d.d_buf)[cnt] = *value;
+ }
+ }
+ else if (shdr->sh_type == SHT_RELA)
+ {
+ size_t sh_entsize = gelf_fsize (scn->elf, ELF_T_RELA, 1, EV_CURRENT);
+ int nentries = shdr->sh_size / sh_entsize;
+ for (int cnt = 0; cnt < nentries; cnt++)
+ {
+ Elf_Data_Scn *data_scn = (Elf_Data_Scn *) &scn->data_list.data.d;
+ Elf64_Rela *value = &((Elf64_Rela *) data_scn->d.d_buf)[cnt];
+ Elf64_Xword info = value->r_info;
+ value->r_info = (((info & 0xffffffff) << 32)
+ | ((info >> 56) & 0xff)
+ | ((info >> 40) & 0xff00)
+ | ((info >> 24) & 0xff0000)
+ | ((info >> 8) & 0xff000000));
+ ((Elf64_Rela *) data_scn->d.d_buf)[cnt] = *value;
+ }
+ }
+ }
}
diff --git a/libelf/elf_update.c b/libelf/elf_update.c
index 56af3a1c..11027c38 100644
--- a/libelf/elf_update.c
+++ b/libelf/elf_update.c
@@ -228,7 +228,60 @@ elf_update (Elf *elf, Elf_Cmd cmd)
size = -1;
}
else
+ {
+ /* Because we converted the relocation info in mips order when we call elf_getdata.c,
+ so we need to convert the modified data in original order bits before writing the
+ data to the file. */
+ Elf_Scn *scn = NULL;
+ while ((scn = elf_nextscn (elf, scn)) != NULL)
+ {
+ GElf_Shdr shdr_mem;
+ GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
+ GElf_Ehdr ehdr_mem;
+ GElf_Ehdr *ehdr = gelf_getehdr (scn->elf, &ehdr_mem);
+ if (shdr != NULL && (shdr->sh_type == SHT_RELA || shdr->sh_type == SHT_REL) &&
+ scn->elf->class == ELFCLASS64 &&
+ ehdr != NULL && ehdr->e_machine == EM_MIPS && ehdr->e_ident[EI_DATA] == ELFDATA2LSB)
+ {
+ Elf_Data *d = elf_getdata (scn, NULL);
+ if (shdr->sh_type == SHT_REL)
+ {
+ size_t sh_entsize = gelf_fsize (scn->elf, ELF_T_REL, 1, EV_CURRENT);
+ int nentries = shdr->sh_size / sh_entsize;
+ for (int cnt = 0; cnt < nentries; ++cnt)
+ {
+ Elf_Data_Scn *data_scn = (Elf_Data_Scn *) d;
+ Elf64_Rel *value = &((Elf64_Rel *) data_scn->d.d_buf)[cnt];
+ Elf64_Xword info = value->r_info;
+ value->r_info = (info >> 32
+ | ((info << 56) & 0xff00000000000000)
+ | ((info << 40) & 0xff000000000000)
+ | ((info << 24) & 0xff0000000000)
+ | ((info << 8) & 0xff00000000));
+ ((Elf64_Rel *) data_scn->d.d_buf)[cnt] = *value;
+ }
+ }
+ else if (shdr->sh_type == SHT_RELA)
+ {
+ size_t sh_entsize = gelf_fsize (scn->elf, ELF_T_RELA, 1, EV_CURRENT);
+ int nentries = shdr->sh_size / sh_entsize;
+ for (int cnt = 0; cnt < nentries; cnt++)
+ {
+ Elf_Data_Scn *data_scn = (Elf_Data_Scn *) d;
+ Elf64_Rela *value = &((Elf64_Rela *) data_scn->d.d_buf)[cnt];
+ Elf64_Xword info = value->r_info;
+ value->r_info = (info >> 32
+ | ((info << 56) & 0xff00000000000000)
+ | ((info << 40) & 0xff000000000000)
+ | ((info << 24) & 0xff0000000000)
+ | ((info << 8) & 0xff00000000));
+ ((Elf64_Rela *) data_scn->d.d_buf)[cnt] = *value;
+ }
+ }
+ }
+ }
size = write_file (elf, size, change_bo, shnum);
+ }
}
out:
--
2.30.2
next prev parent reply other threads:[~2023-04-11 8:12 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-11 8:12 [PATCH 0/5] Add support for MIPS Ying Huang
2023-04-11 8:12 ` Ying Huang [this message]
2023-05-09 15:15 ` [PATCH 1/5] strip: Adapt src/strip -o -f on mips Mark Wielaard
2023-05-16 6:38 ` Ying Huang
2023-05-21 21:13 ` Mark Wielaard
2023-05-24 6:21 ` Ying Huang
2023-05-16 6:46 ` Ying Huang
2023-05-16 7:34 ` Ying Huang
2023-05-21 21:14 ` Mark Wielaard
2023-05-26 2:48 ` Ying Huang
2023-05-16 8:05 ` [EXTERNAL] " Luke Diamand
2023-04-11 8:12 ` [PATCH 2/5] readelf: Adapt src/readelf -h/-S/-r/-w/-l/-d/-a " Ying Huang
2023-05-11 14:31 ` Mark Wielaard
2023-05-16 8:01 ` Ying Huang
2023-07-24 8:35 ` Ying Huang
2023-07-25 8:15 ` Ying Huang
2023-07-27 6:08 ` Ying Huang
2023-08-01 21:43 ` Mark Wielaard
2023-08-01 13:14 ` Mark Wielaard
2023-08-01 9:25 ` Mark Wielaard
2023-04-11 8:12 ` [PATCH 3/5] elflint: Fix invalid type of relocation info and other issues " Ying Huang
2023-05-11 15:59 ` Mark Wielaard
2023-05-17 9:14 ` Ying Huang
2023-04-11 8:12 ` [PATCH 4/5] stack: Fix stack unwind failure " Ying Huang
2023-05-11 16:07 ` Mark Wielaard
2023-05-18 6:14 ` Ying Huang
2023-04-11 8:12 ` [PATCH 5/5] backends: Fix run-native-test.sh and run-funcretval++11.sh run fail " Ying Huang
2023-05-11 16:38 ` Mark Wielaard
2023-05-18 9:06 ` Ying Huang
2023-05-04 2:24 ` [PATCH 0/5] Add support for MIPS 黄莺
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