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# Copyright 2020 Free Software Foundation, Inc.
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# Magic constants used to calculate a starting address when linking
# "jit" shared libraries. When loaded, will be mapped by jit-elf-main
# to the same address.
set jit_load_address 0x7000000
set jit_load_increment 0x1000000
# Compile jit-elf-main.c as an executable.
#
# BINSUFFIX is appended to the binary name.
# OPTIONS is passed to gdb_compile when compiling the program.
#
# On success, return 0.
# On failure, return -1.
proc compile_jit_main {main_srcfile main_binfile options} {
global jit_load_address jit_load_increment
set options [concat \
$options \
additional_flags=-DLOAD_ADDRESS=$jit_load_address \
additional_flags=-DLOAD_INCREMENT=$jit_load_increment \
debug]
if { [gdb_compile ${main_srcfile} ${main_binfile} \
executable $options] != "" } {
set f [file tail $main_binfile]
untested "failed to compile $f"
return -1
}
return 0
}
# Compile jit-elf-main.c as a shared library.
#
# OPTIONS is passed to gdb_compile when compiling the program.
#
# On success, return 0.
# On failure, return -1.
proc compile_jit_elf_main_as_so {main_solib_srcfile main_solib_binfile options} {
global jit_load_address jit_load_increment
set options [list \
additional_flags="-DMAIN=jit_dl_main" \
additional_flags=-DLOAD_ADDRESS=$jit_load_address \
additional_flags=-DLOAD_INCREMENT=$jit_load_increment \
debug]
if { [gdb_compile_shlib ${main_solib_srcfile} ${main_solib_binfile} \
$options] != "" } {
set f [file tail $main_solib_binfile]
untested "failed to compile shared library $f"
return -1
}
return 0
}
# Compile jit-elf-solib.c as a shared library in multiple copies and
# upload them to the target.
#
# On success, return a list of target path to the shared libraries.
# On failure, return -1.
proc compile_and_download_n_jit_so {jit_solib_basename jit_solib_srcfile count} {
global jit_load_address jit_load_increment
set binfiles_target {}
for {set i 1} {$i <= $count} {incr i} {
set binfile [standard_output_file ${jit_solib_basename}.$i.so]
# Note: compiling without debug info by default: some test
# do symbol renaming by munging on ELF symbol table, and that
# wouldn't work for .debug sections. Also, output for "info
# function" changes when debug info is present.
set addr [format 0x%x [expr $jit_load_address + $jit_load_increment * [expr $i-1]]]
# Using -Ttext-segment flag to ask linked to relocate everything
# in the compiled shared library against a fixed base address. Combined
# with mapping the resulting binary to the same fixed base it allows
# to dynamically execute functions from it without any further adjustments.
set options [list \
additional_flags=-DFUNCTION_NAME=[format "jit_function_%04d" $i] \
additional_flags=-Xlinker \
additional_flags=-Ttext-segment=$addr]
if { [gdb_compile_shlib ${jit_solib_srcfile} ${binfile} \
$options] != "" } {
set f [file tail $binfile]
untested "failed to compile shared library $binfile"
return -1
}
set path [gdb_remote_download target ${binfile}]
lappend binfiles_target $path
}
return $binfiles_target
}
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