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dragonwell8_hotspot
提交 71b223ad 编写于 作者: Z zgu
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上级 a8fc00e9 b324f7f0
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Showing with 302 addition and 44 deletion
make/solaris/makefiles/defs.make
浏览文件 @ 71b223ad
......@@ -123,25 +123,10 @@ ifeq ($(JDK6_OR_EARLIER),0)
ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)
# Default OBJCOPY comes from the SUNWbinutils package:
DEF_OBJCOPY=/usr/sfw/bin/gobjcopy
ifeq ($(VM_PLATFORM),solaris_amd64)
# On Solaris AMD64/X64, gobjcopy is not happy and fails:
#
# usr/sfw/bin/gobjcopy --add-gnu-debuglink=<lib>.debuginfo <lib>.so
# BFD: stKPaiop: Not enough room for program headers, try linking with -N
# /usr/sfw/bin/gobjcopy: stKPaiop: Bad value
# BFD: stKPaiop: Not enough room for program headers, try linking with -N
# /usr/sfw/bin/gobjcopy: libsaproc.debuginfo: Bad value
# BFD: stKPaiop: Not enough room for program headers, try linking with -N
# /usr/sfw/bin/gobjcopy: stKPaiop: Bad value
_JUNK_ := $(shell \
echo >&2 "INFO: $(DEF_OBJCOPY) is not working on Solaris AMD64/X64")
OBJCOPY=
else
OBJCOPY=$(shell test -x $(DEF_OBJCOPY) && echo $(DEF_OBJCOPY))
ifneq ($(ALT_OBJCOPY),)
_JUNK_ := $(shell echo >&2 "INFO: ALT_OBJCOPY=$(ALT_OBJCOPY)")
OBJCOPY=$(shell test -x $(ALT_OBJCOPY) && echo $(ALT_OBJCOPY))
endif
OBJCOPY=$(shell test -x $(DEF_OBJCOPY) && echo $(DEF_OBJCOPY))
ifneq ($(ALT_OBJCOPY),)
_JUNK_ := $(shell echo >&2 "INFO: ALT_OBJCOPY=$(ALT_OBJCOPY)")
OBJCOPY=$(shell test -x $(ALT_OBJCOPY) && echo $(ALT_OBJCOPY))
endif
else
OBJCOPY=
......
make/solaris/makefiles/dtrace.make
浏览文件 @ 71b223ad
......@@ -108,15 +108,24 @@ XLIBJVM_DTRACE_DIZ = 64/$(LIBJVM_DTRACE_DIZ)
XLIBJVM_DTRACE_G_DEBUGINFO = 64/$(LIBJVM_DTRACE_G_DEBUGINFO)
XLIBJVM_DTRACE_G_DIZ = 64/$(LIBJVM_DTRACE_G_DIZ)
$(XLIBJVM_DB): $(DTRACE_SRCDIR)/$(JVM_DB).c $(JVMOFFS).h $(LIBJVM_DB_MAPFILE)
$(XLIBJVM_DB): $(ADD_GNU_DEBUGLINK) $(FIX_EMPTY_SEC_HDR_FLAGS) $(DTRACE_SRCDIR)/$(JVM_DB).c $(JVMOFFS).h $(LIBJVM_DB_MAPFILE)
@echo Making $@
$(QUIETLY) mkdir -p 64/ ; \
$(CC) $(SYMFLAG) $(ARCHFLAG/$(ISA)) -D$(TYPE) -I. -I$(GENERATED) \
$(SHARED_FLAG) $(LFLAGS_JVM_DB) -o $@ $(DTRACE_SRCDIR)/$(JVM_DB).c -lc
[ -f $(XLIBJVM_DB_G) ] || { ln -s $(LIBJVM_DB) $(XLIBJVM_DB_G); }
ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)
# gobjcopy crashes on "empty" section headers with the SHF_ALLOC flag set.
# Clear the SHF_ALLOC flag (if set) from empty section headers.
# An empty section header has sh_addr == 0 and sh_size == 0.
# This problem has only been seen on Solaris X64, but we call this tool
# on all Solaris builds just in case.
$(QUIETLY) $(FIX_EMPTY_SEC_HDR_FLAGS) $@
$(QUIETLY) $(OBJCOPY) --only-keep-debug $@ $(XLIBJVM_DB_DEBUGINFO)
$(QUIETLY) $(OBJCOPY) --add-gnu-debuglink=$(XLIBJVM_DB_DEBUGINFO) $@
# $(OBJCOPY) --add-gnu-debuglink=... corrupts SUNW_* sections.
# Use $(ADD_GNU_DEBUGLINK) until a fixed $(OBJCOPY) is available.
# $(QUIETLY) $(OBJCOPY) --add-gnu-debuglink=$(XLIBJVM_DB_DEBUGINFO) $@
$(QUIETLY) $(ADD_GNU_DEBUGLINK) $(XLIBJVM_DB_DEBUGINFO) $@
ifeq ($(STRIP_POLICY),all_strip)
$(QUIETLY) $(STRIP) $@
else
......@@ -133,15 +142,19 @@ ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)
endif
endif
$(XLIBJVM_DTRACE): $(DTRACE_SRCDIR)/$(JVM_DTRACE).c $(DTRACE_SRCDIR)/$(JVM_DTRACE).h $(LIBJVM_DTRACE_MAPFILE)
$(XLIBJVM_DTRACE): $(ADD_GNU_DEBUGLINK) $(FIX_EMPTY_SEC_HDR_FLAGS) $(DTRACE_SRCDIR)/$(JVM_DTRACE).c $(DTRACE_SRCDIR)/$(JVM_DTRACE).h $(LIBJVM_DTRACE_MAPFILE)
@echo Making $@
$(QUIETLY) mkdir -p 64/ ; \
$(CC) $(SYMFLAG) $(ARCHFLAG/$(ISA)) -D$(TYPE) -I. \
$(SHARED_FLAG) $(LFLAGS_JVM_DTRACE) -o $@ $(DTRACE_SRCDIR)/$(JVM_DTRACE).c -lc -lthread -ldoor
[ -f $(XLIBJVM_DTRACE_G) ] || { ln -s $(LIBJVM_DTRACE) $(XLIBJVM_DTRACE_G); }
ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)
# Clear the SHF_ALLOC flag (if set) from empty section headers.
$(QUIETLY) $(FIX_EMPTY_SEC_HDR_FLAGS) $@
$(QUIETLY) $(OBJCOPY) --only-keep-debug $@ $(XLIBJVM_DTRACE_DEBUGINFO)
$(QUIETLY) $(OBJCOPY) --add-gnu-debuglink=$(XLIBJVM_DTRACE_DEBUGINFO) $@
# $(OBJCOPY) --add-gnu-debuglink=... corrupts SUNW_* sections.
# $(QUIETLY) $(OBJCOPY) --add-gnu-debuglink=$(XLIBJVM_DTRACE_DEBUGINFO) $@
$(QUIETLY) $(ADD_GNU_DEBUGLINK) $(XLIBJVM_DTRACE_DEBUGINFO) $@
ifeq ($(STRIP_POLICY),all_strip)
$(QUIETLY) $(STRIP) $@
else
......@@ -198,14 +211,18 @@ $(JVMOFFS).cpp: $(GENOFFS) $(JVMOFFS).h $(JVMOFFS)Index.h
$(JVMOFFS.o): $(JVMOFFS).h $(JVMOFFS).cpp
$(QUIETLY) $(CXX) -c -I. -o $@ $(ARCHFLAG) -D$(TYPE) $(JVMOFFS).cpp
$(LIBJVM_DB): $(DTRACE_SRCDIR)/$(JVM_DB).c $(JVMOFFS.o) $(XLIBJVM_DB) $(LIBJVM_DB_MAPFILE)
$(LIBJVM_DB): $(ADD_GNU_DEBUGLINK) $(FIX_EMPTY_SEC_HDR_FLAGS) $(DTRACE_SRCDIR)/$(JVM_DB).c $(JVMOFFS.o) $(XLIBJVM_DB) $(LIBJVM_DB_MAPFILE)
@echo Making $@
$(QUIETLY) $(CC) $(SYMFLAG) $(ARCHFLAG) -D$(TYPE) -I. -I$(GENERATED) \
$(SHARED_FLAG) $(LFLAGS_JVM_DB) -o $@ $(DTRACE_SRCDIR)/$(JVM_DB).c -lc
[ -f $(LIBJVM_DB_G) ] || { ln -s $@ $(LIBJVM_DB_G); }
ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)
# Clear the SHF_ALLOC flag (if set) from empty section headers.
$(QUIETLY) $(FIX_EMPTY_SEC_HDR_FLAGS) $@
$(QUIETLY) $(OBJCOPY) --only-keep-debug $@ $(LIBJVM_DB_DEBUGINFO)
$(QUIETLY) $(OBJCOPY) --add-gnu-debuglink=$(LIBJVM_DB_DEBUGINFO) $@
# $(OBJCOPY) --add-gnu-debuglink=... corrupts SUNW_* sections.
# $(QUIETLY) $(OBJCOPY) --add-gnu-debuglink=$(LIBJVM_DB_DEBUGINFO) $@
$(QUIETLY) $(ADD_GNU_DEBUGLINK) $(LIBJVM_DB_DEBUGINFO) $@
ifeq ($(STRIP_POLICY),all_strip)
$(QUIETLY) $(STRIP) $@
else
......@@ -222,14 +239,18 @@ ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)
endif
endif
$(LIBJVM_DTRACE): $(DTRACE_SRCDIR)/$(JVM_DTRACE).c $(XLIBJVM_DTRACE) $(DTRACE_SRCDIR)/$(JVM_DTRACE).h $(LIBJVM_DTRACE_MAPFILE)
$(LIBJVM_DTRACE): $(ADD_GNU_DEBUGLINK) $(FIX_EMPTY_SEC_HDR_FLAGS) $(DTRACE_SRCDIR)/$(JVM_DTRACE).c $(XLIBJVM_DTRACE) $(DTRACE_SRCDIR)/$(JVM_DTRACE).h $(LIBJVM_DTRACE_MAPFILE)
@echo Making $@
$(QUIETLY) $(CC) $(SYMFLAG) $(ARCHFLAG) -D$(TYPE) -I. \
$(SHARED_FLAG) $(LFLAGS_JVM_DTRACE) -o $@ $(DTRACE_SRCDIR)/$(JVM_DTRACE).c -lc -lthread -ldoor
[ -f $(LIBJVM_DTRACE_G) ] || { ln -s $@ $(LIBJVM_DTRACE_G); }
ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)
# Clear the SHF_ALLOC flag (if set) from empty section headers.
$(QUIETLY) $(FIX_EMPTY_SEC_HDR_FLAGS) $@
$(QUIETLY) $(OBJCOPY) --only-keep-debug $@ $(LIBJVM_DTRACE_DEBUGINFO)
$(QUIETLY) $(OBJCOPY) --add-gnu-debuglink=$(LIBJVM_DTRACE_DEBUGINFO) $@
# $(OBJCOPY) --add-gnu-debuglink=... corrupts SUNW_* sections.
# $(QUIETLY) $(OBJCOPY) --add-gnu-debuglink=$(LIBJVM_DTRACE_DEBUGINFO) $@
$(QUIETLY) $(ADD_GNU_DEBUGLINK) $(LIBJVM_DTRACE_DEBUGINFO) $@
ifeq ($(STRIP_POLICY),all_strip)
$(QUIETLY) $(STRIP) $@
else
......
make/solaris/makefiles/fix_empty_sec_hdr_flags.make 0 → 100644
浏览文件 @ 71b223ad
#
# Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
#
# This code is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 2 only, as
# published by the Free Software Foundation.
#
# This code 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
# version 2 for more details (a copy is included in the LICENSE file that
# accompanied this code).
#
# You should have received a copy of the GNU General Public License version
# 2 along with this work; if not, write to the Free Software Foundation,
# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
# or visit www.oracle.com if you need additional information or have any
# questions.
#
#
# Rules to build fix_empty_sec_hdr_flags, used by vm.make on Solaris
GENERATED = ../generated
FIX_EMPTY_SEC_HDR_FLAGS = $(GENERATED)/fix_empty_sec_hdr_flags
FIX_EMPTY_SEC_HDR_FLAGS_DIR = $(GAMMADIR)/src/os/solaris/fix_empty_sec_hdr_flags
FIX_EMPTY_SEC_HDR_FLAGS_SRC = $(FIX_EMPTY_SEC_HDR_FLAGS_DIR)/fix_empty_sec_hdr_flags.c
FIX_EMPTY_SEC_HDR_FLAGS_FLAGS =
LIBS_FIX_EMPTY_SEC_HDR_FLAGS += -lelf
ifeq ("${Platform_compiler}", "sparcWorks")
# Enable the following FIX_EMPTY_SEC_HDR_FLAGS_FLAGS addition if you need to
# compare the built ELF objects.
#
# The -g option makes static data global and the "-W0,-noglobal"
# option tells the compiler to not globalize static data using a unique
# globalization prefix. Instead force the use of a static globalization
# prefix based on the source filepath so the objects from two identical
# compilations are the same.
#
# Note: The blog says to use "-W0,-xglobalstatic", but that doesn't
# seem to work. I got "-W0,-noglobal" from Kelly and that works.
#FIX_EMPTY_SEC_HDR_FLAGS_FLAGS += -W0,-noglobal
endif # Platform_compiler == sparcWorks
$(FIX_EMPTY_SEC_HDR_FLAGS): $(FIX_EMPTY_SEC_HDR_FLAGS_SRC)
$(CC) -g -o $@ $< $(FIX_EMPTY_SEC_HDR_FLAGS_FLAGS) $(LIBS_FIX_EMPTY_SEC_HDR_FLAGS)
make/solaris/makefiles/jsig.make
浏览文件 @ 71b223ad
......@@ -52,14 +52,23 @@ else
LFLAGS_JSIG += -mt -xnolib
endif
$(LIBJSIG): $(JSIGSRCDIR)/jsig.c $(LIBJSIG_MAPFILE)
$(LIBJSIG): $(ADD_GNU_DEBUGLINK) $(FIX_EMPTY_SEC_HDR_FLAGS) $(JSIGSRCDIR)/jsig.c $(LIBJSIG_MAPFILE)
@echo Making signal interposition lib...
$(QUIETLY) $(CC) $(SYMFLAG) $(ARCHFLAG) $(SHARED_FLAG) $(PICFLAG) \
$(LFLAGS_JSIG) -o $@ $< -ldl
$(LFLAGS_JSIG) -o $@ $(JSIGSRCDIR)/jsig.c -ldl
[ -f $(LIBJSIG_G) ] || { ln -s $@ $(LIBJSIG_G); }
ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)
# gobjcopy crashes on "empty" section headers with the SHF_ALLOC flag set.
# Clear the SHF_ALLOC flag (if set) from empty section headers.
# An empty section header has sh_addr == 0 and sh_size == 0.
# This problem has only been seen on Solaris X64, but we call this tool
# on all Solaris builds just in case.
$(QUIETLY) $(FIX_EMPTY_SEC_HDR_FLAGS) $@
$(QUIETLY) $(OBJCOPY) --only-keep-debug $@ $(LIBJSIG_DEBUGINFO)
$(QUIETLY) $(OBJCOPY) --add-gnu-debuglink=$(LIBJSIG_DEBUGINFO) $@
# $(OBJCOPY) --add-gnu-debuglink=... corrupts SUNW_* sections.
# Use $(ADD_GNU_DEBUGLINK) until a fixed $(OBJCOPY) is available.
# $(QUIETLY) $(OBJCOPY) --add-gnu-debuglink=$(LIBJSIG_DEBUGINFO) $@
$(QUIETLY) $(ADD_GNU_DEBUGLINK) $(LIBJSIG_DEBUGINFO) $@
ifeq ($(STRIP_POLICY),all_strip)
$(QUIETLY) $(STRIP) $@
else
......
make/solaris/makefiles/saproc.make
浏览文件 @ 71b223ad
......@@ -90,7 +90,7 @@ $(shell uname -r -v \
# when actually building on Nevada-B158 or earlier:
#SOLARIS_11_B159_OR_LATER=-DSOLARIS_11_B159_OR_LATER
$(LIBSAPROC): $(SASRCFILES) $(SAMAPFILE)
$(LIBSAPROC): $(ADD_GNU_DEBUGLINK) $(FIX_EMPTY_SEC_HDR_FLAGS) $(SASRCFILES) $(SAMAPFILE)
$(QUIETLY) if [ "$(BOOT_JAVA_HOME)" = "" ]; then \
echo "ALT_BOOTDIR, BOOTDIR or JAVA_HOME needs to be defined to build SA"; \
exit 1; \
......@@ -109,8 +109,17 @@ $(LIBSAPROC): $(SASRCFILES) $(SAMAPFILE)
-ldl -ldemangle -lthread -lc
[ -f $(LIBSAPROC_G) ] || { ln -s $@ $(LIBSAPROC_G); }
ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)
# gobjcopy crashes on "empty" section headers with the SHF_ALLOC flag set.
# Clear the SHF_ALLOC flag (if set) from empty section headers.
# An empty section header has sh_addr == 0 and sh_size == 0.
# This problem has only been seen on Solaris X64, but we call this tool
# on all Solaris builds just in case.
$(QUIETLY) $(FIX_EMPTY_SEC_HDR_FLAGS) $@
$(QUIETLY) $(OBJCOPY) --only-keep-debug $@ $(LIBSAPROC_DEBUGINFO)
$(QUIETLY) $(OBJCOPY) --add-gnu-debuglink=$(LIBSAPROC_DEBUGINFO) $@
# $(OBJCOPY) --add-gnu-debuglink=... corrupts SUNW_* sections.
# Use $(ADD_GNU_DEBUGLINK) until a fixed $(OBJCOPY) is available.
# $(QUIETLY) $(OBJCOPY) --add-gnu-debuglink=$(LIBSAPROC_DEBUGINFO) $@
$(QUIETLY) $(ADD_GNU_DEBUGLINK) $(LIBSAPROC_DEBUGINFO) $@
ifeq ($(STRIP_POLICY),all_strip)
$(QUIETLY) $(STRIP) $@
else
......
make/solaris/makefiles/vm.make
浏览文件 @ 71b223ad
......@@ -148,6 +148,10 @@ include $(MAKEFILES_DIR)/dtrace.make
# add_gnu_debuglink tool
include $(MAKEFILES_DIR)/add_gnu_debuglink.make
#----------------------------------------------------------------------
# fix_empty_sec_hdr_flags tool
include $(MAKEFILES_DIR)/fix_empty_sec_hdr_flags.make
#----------------------------------------------------------------------
# JVM
......@@ -280,7 +284,7 @@ else
LINK_VM = $(LINK_LIB.CXX)
endif
# making the library:
$(LIBJVM): $(ADD_GNU_DEBUGLINK) $(LIBJVM.o) $(LIBJVM_MAPFILE)
$(LIBJVM): $(ADD_GNU_DEBUGLINK) $(FIX_EMPTY_SEC_HDR_FLAGS) $(LIBJVM.o) $(LIBJVM_MAPFILE)
ifeq ($(filter -sbfast -xsbfast, $(CFLAGS_BROWSE)),)
@echo Linking vm...
$(QUIETLY) $(LINK_LIB.CXX/PRE_HOOK)
......@@ -290,10 +294,15 @@ ifeq ($(filter -sbfast -xsbfast, $(CFLAGS_BROWSE)),)
$(QUIETLY) [ -f $(LIBJVM_G) ] || ln -s $@ $(LIBJVM_G)
$(QUIETLY) [ -f $(LIBJVM_G).1 ] || ln -s $@.1 $(LIBJVM_G).1
ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)
# gobjcopy crashes on "empty" section headers with the SHF_ALLOC flag set.
# Clear the SHF_ALLOC flag (if set) from empty section headers.
# An empty section header has sh_addr == 0 and sh_size == 0.
# This problem has only been seen on Solaris X64, but we call this tool
# on all Solaris builds just in case.
$(QUIETLY) $(FIX_EMPTY_SEC_HDR_FLAGS) $@
$(QUIETLY) $(OBJCOPY) --only-keep-debug $@ $(LIBJVM_DEBUGINFO)
# $(OBJCOPY) --add-gnu-debuglink=... corrupts the SUNW_dof section
# in libjvm.so. Use $(ADD_GNU_DEBUGLINK) until a fixed $(OBJCOPY)
# is available.
# $(OBJCOPY) --add-gnu-debuglink=... corrupts SUNW_* sections.
# Use $(ADD_GNU_DEBUGLINK) until a fixed $(OBJCOPY) is available.
# $(QUIETLY) $(OBJCOPY) --add-gnu-debuglink=$(LIBJVM_DEBUGINFO) $@
$(QUIETLY) $(ADD_GNU_DEBUGLINK) $(LIBJVM_DEBUGINFO) $@
ifeq ($(STRIP_POLICY),all_strip)
......
make/windows/makefiles/defs.make
浏览文件 @ 71b223ad
......@@ -143,14 +143,7 @@ _JUNK_ := $(shell \
MAKE_ARGS += ENABLE_FULL_DEBUG_SYMBOLS=$(ENABLE_FULL_DEBUG_SYMBOLS)
ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)
# Disable ZIP_DEBUGINFO_FILES by default because various tests are
# failing in nightly when the debug info files are ZIP'ed.
#ZIP_DEBUGINFO_FILES ?= 0
# The above conditional setting logic is unreliable on Windows for
# unknown reasons. We force ZIP_DEBUGINFO_FILES to be disabled on
# Windows until we figure out why the various tests are failing
# AND why the conditional setting logic is unreliable.
ZIP_DEBUGINFO_FILES=0
ZIP_DEBUGINFO_FILES ?= 1
else
ZIP_DEBUGINFO_FILES=0
endif
......
src/os/solaris/fix_empty_sec_hdr_flags/fix_empty_sec_hdr_flags.c 0 → 100644
浏览文件 @ 71b223ad
/*
* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
/*
* Name: fix_empty_sec_hdr_flags.c
*
* Description: Remove the SHF_ALLOC flag from "empty" section headers.
* An "empty" section header has sh_addr == 0 and sh_size == 0.
*
* This program is adapted from the example program shown on the
* elf(3elf) man page and from code from the Solaris compiler
* driver.
*/
#include <fcntl.h>
#include <stdio.h>
#include <libelf.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static void failure(void);
void
main(int argc, char ** argv) {
void * ehdr; /* ELF header */
unsigned int i; /* section counter */
int fd; /* descriptor for file */
Elf * elf; /* ELF descriptor */
char * elf_ident; /* ELF identity string */
char * elf_obj; /* elf_obj file */
int fix_count; /* number of flags fixed */
int is_elfclass64; /* is an ELFCLASS64 file? */
Elf_Scn * scn; /* ELF section descriptor */
void * shdr; /* ELF section header */
Elf_Data * shstrtab; /* ELF section header string table */
if (argc != 2) {
(void) fprintf(stderr, "Usage: %s elf_obj\n", argv[0]);
exit(2);
}
/* open the elf_obj */
elf_obj = argv[1];
if ((fd = open(elf_obj, O_RDWR)) == -1) {
(void) fprintf(stderr, "%s: cannot open file.\n", elf_obj);
exit(3);
}
(void) printf("Opening '%s' for update\n", elf_obj);
(void) fflush(stdout);
(void) elf_version(EV_CURRENT); /* coordinate ELF versions */
/* obtain the ELF descriptors from the input file */
if ((elf = elf_begin(fd, ELF_C_RDWR, NULL)) == NULL) {
failure();
}
/* determine if ELFCLASS64 or not? */
elf_ident = elf_getident(elf, NULL);
is_elfclass64 = (elf_ident[EI_CLASS] == ELFCLASS64);
/* get the ELF header */
if (is_elfclass64) {
ehdr = elf64_getehdr(elf);
} else {
ehdr = elf32_getehdr(elf);
}
if (ehdr == NULL) {
failure();
}
/* get the ELF section descriptor */
if (is_elfclass64) {
scn = elf_getscn(elf, ((Elf64_Ehdr *) ehdr)->e_shstrndx);
} else {
scn = elf_getscn(elf, ((Elf32_Ehdr *) ehdr)->e_shstrndx);
}
if (scn == NULL) {
failure();
}
/* get the section header string table */
shstrtab = elf_getdata(scn, NULL);
if (shstrtab == NULL) {
failure();
}
fix_count = 0;
/* traverse the sections of the input file */
for (i = 1, scn = NULL; scn = elf_nextscn(elf, scn); i++) {
int has_flag_set; /* is SHF_ALLOC flag set? */
int is_empty; /* is section empty? */
char * name; /* short hand pointer */
/* get the section header */
if (is_elfclass64) {
shdr = elf64_getshdr(scn);
} else {
shdr = elf32_getshdr(scn);
}
if (shdr == NULL) {
failure();
}
if (is_elfclass64) {
name = (char *)shstrtab->d_buf + ((Elf64_Shdr *) shdr)->sh_name;
} else {
name = (char *)shstrtab->d_buf + ((Elf32_Shdr *) shdr)->sh_name;
}
if (is_elfclass64) {
has_flag_set = ((Elf64_Shdr *) shdr)->sh_flags & SHF_ALLOC;
is_empty = ((Elf64_Shdr *) shdr)->sh_addr == 0 &&
((Elf64_Shdr *) shdr)->sh_size == 0;
} else {
has_flag_set = ((Elf32_Shdr *) shdr)->sh_flags & SHF_ALLOC;
is_empty = ((Elf32_Shdr *) shdr)->sh_addr == 0 &&
((Elf32_Shdr *) shdr)->sh_size == 0;
}
if (is_empty && has_flag_set) {
(void) printf("section[%u] '%s' is empty, "
"but SHF_ALLOC flag is set.\n", i, name);
(void) printf("Clearing the SHF_ALLOC flag.\n");
if (is_elfclass64) {
((Elf64_Shdr *) shdr)->sh_flags &= ~SHF_ALLOC;
} else {
((Elf32_Shdr *) shdr)->sh_flags &= ~SHF_ALLOC;
}
fix_count++;
}
} /* end for each ELF section */
if (fix_count > 0) {
(void) printf("Saving %d updates to '%s'\n", fix_count, elf_obj);
(void) fflush(stdout);
(void) elf_update(elf, ELF_C_NULL); /* recalc ELF memory structures */
(void) elf_update(elf, ELF_C_WRITE); /* write out changes to ELF obj */
} else {
(void) printf("No SHF_ALLOC flags needed to be cleared.\n");
}
(void) elf_end(elf); /* done with ELF obj */
(void) close(fd);
(void) printf("Done %s '%s'\n",
(fix_count > 0) ? "updating" : "with", elf_obj);
(void) fflush(stdout);
exit(0);
} /* end main */
static void
failure() {
(void) fprintf(stderr, "%s\n", elf_errmsg(elf_errno()));
exit(6);
}
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