gdb/testsuite/lib/jit-elf-helpers.exp

   1 # Copyright 2020-2021 Free Software Foundation, Inc.
   2
   3 # This program is free software; you can redistribute it and/or modify
   4 # it under the terms of the GNU General Public License as published by
   5 # the Free Software Foundation; either version 3 of the License, or
   6 # (at your option) any later version.
   7 #
   8 # This program is distributed in the hope that it will be useful,
   9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 # GNU General Public License for more details.
  12 #
  13 # You should have received a copy of the GNU General Public License
  14 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15
  16 # Magic constants used to calculate a starting address when linking
  17 # "jit" shared libraries.  When loaded, will be mapped by jit-elf-main
  18 # to the same address.
  19
  20 set jit_load_address   0x7000000
  21 set jit_load_increment 0x1000000
  22
  23 # Compile jit-elf-main.c as an executable.
  24 #
  25 # BINSUFFIX is appended to the binary name.
  26 # OPTIONS is passed to gdb_compile when compiling the program.
  27 #
  28 # On success, return 0.
  29 # On failure, return -1.
  30 proc compile_jit_main {main_srcfile main_binfile options} {
  31     global jit_load_address jit_load_increment
  32
  33     set options [concat \
  34         $options \
  35         additional_flags=-DLOAD_ADDRESS=$jit_load_address \
  36         additional_flags=-DLOAD_INCREMENT=$jit_load_increment \
  37         debug]
  38
  39     if { [gdb_compile ${main_srcfile} ${main_binfile} \
  40               executable $options] != "" } {
  41         set f [file tail $main_binfile]
  42         untested "failed to compile $f"
  43         return -1
  44     }
  45
  46     return 0
  47 }
  48
  49 # Compile jit-elf-main.c as a shared library.
  50 #
  51 # OPTIONS is passed to gdb_compile when compiling the program.
  52 #
  53 # On success, return 0.
  54 # On failure, return -1.
  55 proc compile_jit_elf_main_as_so {main_solib_srcfile main_solib_binfile options} {
  56     global jit_load_address jit_load_increment
  57
  58     set options [list \
  59         additional_flags="-DMAIN=jit_dl_main" \
  60         additional_flags=-DLOAD_ADDRESS=$jit_load_address \
  61         additional_flags=-DLOAD_INCREMENT=$jit_load_increment \
  62         debug]
  63
  64     if { [gdb_compile_shlib ${main_solib_srcfile} ${main_solib_binfile} \
  65               $options] != "" } {
  66         set f [file tail $main_solib_binfile]
  67         untested "failed to compile shared library $f"
  68         return -1
  69     }
  70
  71     return 0
  72 }
  73
  74 # Compile jit-elf-solib.c as a shared library in multiple copies and
  75 # upload them to the target.
  76 #
  77 # On success, return a list of target path to the shared libraries.
  78 # On failure, return -1.
  79 proc compile_and_download_n_jit_so {jit_solib_basename jit_solib_srcfile count} {
  80     global jit_load_address jit_load_increment
  81     set binfiles_target {}
  82
  83     for {set i 1} {$i <= $count} {incr i} {
  84         set binfile [standard_output_file ${jit_solib_basename}.$i.so]
  85
  86         # Note: compiling without debug info by default: some test
  87         # do symbol renaming by munging on ELF symbol table, and that
  88         # wouldn't work for .debug sections.  Also, output for "info
  89         # function" changes when debug info is present.
  90         set addr [format 0x%x [expr $jit_load_address + $jit_load_increment * [expr $i-1]]]
  91         # Using -Ttext-segment flag to ask linked to relocate everything
  92         # in the compiled shared library against a fixed base address.  Combined
  93         # with mapping the resulting binary to the same fixed base it allows
  94         # to dynamically execute functions from it without any further adjustments.
  95         set options [list \
  96             additional_flags=-DFUNCTION_NAME=[format "jit_function_%04d" $i] \
  97             additional_flags=-Xlinker \
  98             additional_flags=-Ttext-segment=$addr]
  99         if { [gdb_compile_shlib ${jit_solib_srcfile} ${binfile} \
 100                   $options] != "" } {
 101             set f [file tail $binfile]
 102             untested "failed to compile shared library $f"
 103             return -1
 104         }
 105
 106         set path [gdb_remote_download target ${binfile}]
 107         lappend binfiles_target $path
 108     }
 109
 110     return $binfiles_target
 111 }