gdb: Initial baremetal riscv support
This commit introduces basic support for baremetal RiscV as a GDB
target. This target is currently only tested against the RiscV software
simulator, which is not included as part of this commit. The target has
been tested against the following RiscV variants: rv32im, rv32imc,
rv32imf, rv32imfc, rv64im, rv64imc, rv64imfd, rv64imfdc.
Across these variants we pass on average 34858 tests, and fail 272
tests, which is ~0.8%.
The RiscV has a feature of its ABI where structures with a single
floating point field, a single complex float field, or one float and
one integer field are treated differently for argument passing. The
new test gdb.base/infcall-nested-structs.exp is added to cover this
feature. As passing these structures should work on all targets then
I've made the test as a generic one, even though, for most targets,
there's probably nothing special about any of these cases.
gdb/ChangeLog:
* Makefile.in (ALL_TARGET_OBS): Add riscv-tdep.o
(HFILES_NO_SRCDIR): Add riscv-tdep.h.
(ALLDEPFILES): Add riscv-tdep.c
* configure.tgt: Add riscv support.
* riscv-tdep.c: New file.
* riscv-tdep.h: New file.
* NEWS: Mention new target.
* MAINTAINERS: Add entry for riscv.
gdb/testsuite/ChangeLog:
* gdb.base/infcall-nested-structs.exp: New file.
* gdb.base/infcall-nested-structs.c: New file.
* gdb.base/float.exp: Add riscv support.
2017-11-09 21:59:13 +01:00
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# This testcase is part of GDB, the GNU debugger.
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# Copyright 2018 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# Some targets can't call functions, so don't even bother with this
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# test.
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if [target_info exists gdb,cannot_call_functions] {
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unsupported "this target can not call functions"
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continue
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}
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set int_types { tc ts ti tl tll }
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set float_types { tf td tld }
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set complex_types { tfc tdc tldc }
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set compile_flags {debug}
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if [support_complex_tests] {
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lappend compile_flags "additional_flags=-DTEST_COMPLEX"
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}
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# Given N (0..25), return the corresponding alphabetic letter in upper
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# case.
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proc I2A { n } {
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return [string range "ABCDEFGHIJKLMNOPQRSTUVWXYZ" $n $n]
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}
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# Compile a variant of nested-structs.c using TYPES to specify the
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# types of the struct fields within the source. Run up to main.
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# Also updates the global "testfile" to reflect the most recent build.
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proc start_nested_structs_test { types } {
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global testfile
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global srcfile
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global binfile
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global subdir
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global srcdir
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global compile_flags
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standard_testfile .c
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# Create the additional flags
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set flags $compile_flags
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for {set n 0} {$n<[llength ${types}]} {incr n} {
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set m [I2A ${n}]
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set t [lindex ${types} $n]
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lappend flags "additional_flags=-Dt${m}=${t}"
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append testfile "-" "$t"
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}
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set binfile [standard_output_file ${testfile}]
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if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable "${flags}"] != "" } {
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unresolved "failed to compile"
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return 0
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}
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# Start with a fresh gdb.
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clean_restart ${binfile}
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# Make certain that the output is consistent
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gdb_test_no_output "set print sevenbit-strings"
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gdb_test_no_output "set print address off"
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gdb_test_no_output "set print pretty off"
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gdb_test_no_output "set width 0"
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gdb_test_no_output "set print elements 300"
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# Advance to main
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if { ![runto_main] } then {
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fail "can't run to main"
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return 0
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}
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# Now continue forward to a suitable location to run the tests.
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# Some targets only enable the FPU on first use, so ensure that we
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# have used the FPU before we make calls from GDB to code that
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# could use the FPU.
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gdb_breakpoint [gdb_get_line_number "Break Here"] temporary
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gdb_continue_to_breakpoint "breakpt" ".* Break Here\\. .*"
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return 1
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}
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# Assuming GDB is stopped at main within a test binary, run some tests
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# passing structures, and reading return value structures.
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proc run_tests {} {
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global gdb_prompt
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2018-08-29 12:43:53 +02:00
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foreach {name} {struct_01_01 struct_01_02 struct_01_03 struct_01_04
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struct_02_01 struct_02_02 struct_02_03 struct_02_04
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struct_04_01 struct_04_02 struct_04_03 struct_04_04
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struct_05_01 struct_05_02 struct_05_03 struct_05_04} {
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gdb: Initial baremetal riscv support
This commit introduces basic support for baremetal RiscV as a GDB
target. This target is currently only tested against the RiscV software
simulator, which is not included as part of this commit. The target has
been tested against the following RiscV variants: rv32im, rv32imc,
rv32imf, rv32imfc, rv64im, rv64imc, rv64imfd, rv64imfdc.
Across these variants we pass on average 34858 tests, and fail 272
tests, which is ~0.8%.
The RiscV has a feature of its ABI where structures with a single
floating point field, a single complex float field, or one float and
one integer field are treated differently for argument passing. The
new test gdb.base/infcall-nested-structs.exp is added to cover this
feature. As passing these structures should work on all targets then
I've made the test as a generic one, even though, for most targets,
there's probably nothing special about any of these cases.
gdb/ChangeLog:
* Makefile.in (ALL_TARGET_OBS): Add riscv-tdep.o
(HFILES_NO_SRCDIR): Add riscv-tdep.h.
(ALLDEPFILES): Add riscv-tdep.c
* configure.tgt: Add riscv support.
* riscv-tdep.c: New file.
* riscv-tdep.h: New file.
* NEWS: Mention new target.
* MAINTAINERS: Add entry for riscv.
gdb/testsuite/ChangeLog:
* gdb.base/infcall-nested-structs.exp: New file.
* gdb.base/infcall-nested-structs.c: New file.
* gdb.base/float.exp: Add riscv support.
2017-11-09 21:59:13 +01:00
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gdb_test "p/d check_arg_${name} (ref_val_${name})" "= 1"
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set refval [ get_valueof "" "ref_val_${name}" "" ]
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verbose -log "Refval: ${refval}"
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set test "check return value ${name}"
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if { ${refval} != "" } {
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set answer [ get_valueof "" "rtn_str_${name} ()" "XXXX"]
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verbose -log "Answer: ${answer}"
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gdb_assert [string eq ${answer} ${refval}] ${test}
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} else {
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unresolved $test
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}
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}
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}
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# Set up a test prefix, compile the test binary, run to main, and then
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# run some tests.
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proc start_gdb_and_run_tests { types } {
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set prefix "types"
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foreach t $types {
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append prefix "-" "${t}"
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}
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with_test_prefix $prefix {
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if { [start_nested_structs_test $types] } {
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run_tests
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}
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}
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}
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foreach ta $int_types {
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start_gdb_and_run_tests $ta
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}
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if [support_complex_tests] {
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foreach ta $complex_types {
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start_gdb_and_run_tests $ta
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}
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}
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if ![gdb_skip_float_test] {
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foreach ta $float_types {
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start_gdb_and_run_tests $ta
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}
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foreach ta $int_types {
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foreach tb $float_types {
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start_gdb_and_run_tests [list $ta $tb]
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}
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}
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foreach ta $float_types {
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foreach tb $int_types {
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start_gdb_and_run_tests [list $ta $tb]
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}
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foreach tb $float_types {
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start_gdb_and_run_tests [list $ta $tb]
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}
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}
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}
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