#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License (the "License").
# You may not use this file except in compliance with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or http://www.opensolaris.org/os/licensing.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#

#
# Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
# Copyright 2019 OmniOS Community Edition (OmniOSce) Association.
#

BASEPLAT =	amd64

# Object lists are organized into primary (most frequently used code) and
# secondary lists (less frequently used code).

P_COMOBJS=	debugdata.o \
		analyze.o	elf.o		external.o	globals.o \
		malloc.o	paths.o		setup.o		util.o \
		dlfcns.o	config_elf.o	locale.o	tsort.o \
		remove.o	move.o		tls.o		cap.o

S_COMOBJS=	debug.o		audit.o		object.o

G_MACHOBJS=	doreloc.o

P_MACHOBJS=	amd64_elf.o	_setup.o	dlamd64getunwind.o

CP_MACHOBJS=

S_MACHOBJS=

P_ASOBJS=	boot.o		boot_elf.o	caller.o

S_ASOBJS=

CRTSRCS=	../../../../lib/crt/amd64
CRTI=		pics/crti.o
CRTN=		pics/crtn.o
CRTS=		$(CRTI)		$(CRTN)

include		$(SRC)/cmd/sgs/rtld/Makefile.com
include		$(SRC)/lib/Makefile.lib.64

MAPFILE-ORDER =	../common/mapfile-order-gcc

# Add any machine specific flags.

ASFLAGS +=	-D__amd64 -D_ELF64 $(amd64_ASFLAGS)
ADBGENFLAGS +=	-mlp64
ADBSUB=		$(ADBSUB64)
CPPFLAGS +=	-D_ELF64
# Hammerhead: 64-bit only - runtime linker at flattened path
SONAME=		/lib/ld.so.1

SGSMSGTARG +=	$(SGSMSGINTEL) $(SGSMSGINTEL64) $(SGSMSG64)

LDLIB =		-L ../../libld/$(MACH64)
RTLDLIB =	-L ../../librtld/$(MACH64)

CPICLIB =	$(CPICLIB64)
LDDBGLIBDIR =	$(LDDBGLIBDIR64)
CONVLIBDIR =	$(CONVLIBDIR64)

.KEEP_STATE:

all:		$(RTLD)

install:	all $(ROOTDYNLIB64) $(ROOTCOMPATLINKS) $(ROOTCOMPATLINKS64)

adbmacros:	adb .WAIT $(ADBSCRIPTS)

adbinstall:	adbmacros .WAIT $(ROOTADB64)

include		$(SRC)/cmd/sgs/rtld/Makefile.targ
include		$(SRC)/Makefile.master.64

# Hammerhead: ld.so.1 MUST be linked by illumos ld (sunld), not GNU ld.
# GNU ld produces ELFOSABI_NONE, missing PT_SUNWDTRACE/PT_SUNW_UNWIND program
# headers, and wrong segment alignment — the kernel cannot properly map the
# result. Override LD after Makefile.master.64 (which resets LD=$(LD64)).
#
# `unexport LD_ALTEXEC` does NOT reliably prevent sunld from seeing the
# variable in recipe subshells (gmake may still pass it through).  When
# LD_ALTEXEC is set to gnu-ld-wrapper, sunld re-execs that wrapper,
# which silently ignores `-z dtrace=dtrace_data` — the resulting
# ld.so.1 has PT_SUNWDTRACE with p_memsz=0, and the kernel's
# dtrace_safe_phdr() rejects it with silent ENOEXEC when exec'ing any
# binary that uses ld.so.1 as its interpreter (including /sbin/init).
#
# Use the same wrapper script kernel linking uses: a single-token path
# that unsets LD_ALTEXEC before exec'ing /usr/bin/sunld.  See
# `usr/src/tools/scripts/sunld-kernel.sh`.
unexport LD_ALTEXEC
LD = $(SRC)/tools/scripts/sunld-kernel.sh
GSHARED = -G

# Redefine DYNFLAGS in illumos ld native syntax (no -Wl, prefix).
# The Makefile.targ link rule calls $(LD) directly, not $(CC).
# Note: illumos ld requires space between -z and the keyword.
DYNFLAGS = -h $(SONAME) -z textoff -z defs \
	$(MAPFILES:%=-M %) $(MAPFILE.PGA:%=-M %) \
	-i -e _rt_boot $(VERSREF) $(ZNODLOPEN) \
	$(ZINTERPOSE) -z dtrace=dtrace_data '-R$$ORIGIN' \
	-Bsymbolic
ZNODLOPEN = -z nodlopen
ZINTERPOSE = -z interpose

# Hammerhead: GNU strip corrupts ld.so.1 in two places.
#
# 1. POST_PROCESS_SO runs STRIP_STABS ($(STRIP) -x $@) after the link
#    rule in Makefile.targ.  On Hammerhead $(STRIP) is GNU strip.
# 2. INS.file in Makefile.master passes `-s` to install(1), which
#    invokes GNU strip again at install time.
#
# GNU strip handles the Solaris PT_SUNWDTRACE program header
# incorrectly:
#
#   - sunld with `-z dtrace=dtrace_data` creates a PT_SUNWDTRACE
#     program header with p_filesz=0 (NOBITS — dtrace_data is in
#     .bss), p_memsz=0x40 (= FASTTRAP_SUNWDTRACE_SIZE), p_vaddr set to
#     the symbol address.
#   - GNU strip sees p_filesz=0 and 'optimizes' by zeroing p_memsz as
#     well, and drops the `dtrace_data` symbol entirely.
#   - The kernel's dtrace_safe_phdr() at elf.c:123 rejects any
#     interpreter whose PT_SUNWDTRACE p_memsz < PT_SUNWDTRACE_SIZE (64).
#   - Result: every exec() of a dynamic binary that uses ld.so.1 as
#     its interpreter fails with ENOEXEC (including /sbin/init).
#
# Disable both strip calls.  The rest of POST_PROCESS_SO (mcs -d,
# elfsign) still runs.  ld.so.1 ends up larger (~1.4 MB unstripped vs
# ~474 KB stripped) but exec works.
STRIP_STABS = :
INS.file = $(RM) $@; $(INS) -m $(FILEMODE) -f $(@D) $<