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Add -z initfirst
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parent
46d214cafa
commit
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@ -372,6 +372,8 @@ void parse_nonpositional_args(Context<E> &ctx,
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ctx.arg.z_delete = false;
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} else if (read_z_flag(args, "nocopyreloc")) {
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ctx.arg.z_copyreloc = false;
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} else if (read_z_flag(args, "initfirst")) {
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ctx.arg.z_initfirst = true;
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} else if (read_flag(args, "no-undefined")) {
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ctx.arg.z_defs = true;
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} else if (read_flag(args, "fatal-warnings")) {
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1
elf.h
1
elf.h
@ -182,6 +182,7 @@ static constexpr u32 DF_STATIC_TLS = 0x10;
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static constexpr u32 DF_1_NOW = 0x00000001;
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static constexpr u32 DF_1_NODELETE = 0x00000008;
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static constexpr u32 DF_1_INITFIRST = 0x00000020;
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static constexpr u32 DF_1_NOOPEN = 0x00000040;
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static constexpr u32 DF_1_PIE = 0x08000000;
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1
mold.h
1
mold.h
@ -1273,6 +1273,7 @@ struct Context {
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bool z_delete = true;
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bool z_dlopen = true;
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bool z_execstack = false;
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bool z_initfirst = false;
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bool z_now = false;
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bool z_relro = true;
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i16 default_version = VER_NDX_GLOBAL;
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@ -480,6 +480,8 @@ static std::vector<typename E::WordTy> create_dynamic_section(Context<E> &ctx) {
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flags1 |= DF_1_NOOPEN;
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if (!ctx.arg.z_delete)
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flags1 |= DF_1_NODELETE;
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if (ctx.arg.z_initfirst)
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flags1 |= DF_1_INITFIRST;
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if (ctx.has_gottp_rel)
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flags |= DF_STATIC_TLS;
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19
test/initfirst.sh
Executable file
19
test/initfirst.sh
Executable file
@ -0,0 +1,19 @@
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#!/bin/bash
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set -e
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cd $(dirname $0)
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echo -n "Testing $(basename -s .sh $0) ... "
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t=$(pwd)/tmp/$(basename -s .sh $0)
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mkdir -p $t
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cat <<EOF | clang -c -fPIC -o $t/a.o -xc -
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#include <stdio.h>
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void foo() {
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printf("Hello world\n");
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}
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EOF
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clang -fuse-ld=`pwd`/../mold -shared -o $t/b.so $t/a.o -Wl,-z,initfirst
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readelf --dynamic $t/b.so | grep -q 'Flags: INITFIRST'
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echo OK
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