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# This testcase is part of GDB, the GNU debugger.
# Copyright 2017-2024 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/>.
require {istarget "arc*-*-*"}
standard_testfile .S
# arc-analyze-prologue.S test does not contain debug information thus it must
# be compiled without -g option. Otherwise GDB will try to unwind frames using
# debug information (which does not exist for .S code!) instead of analyzing
# frames manually.
set options {}
if { [prepare_for_testing "failed to prepare" $testfile $srcfile $options] } {
return -1
}
if ![runto_main] {
return 0
}
# Convert list of saved registers and their offsets to a GDB string.
proc saved_regs_to_str { savedregs funcname } {
set str ""
# If blink is stored, that it is present twice in saved regs - as blink and
# as pc.
set has_blink 0
set blink_addr 0
foreach r $savedregs {
if { [llength $r] == 1 } {
append str ".*$r at.*"
} else {
set name [lindex $r 0]
set offset [lindex $r 1]
set addr [get_hexadecimal_valueof "\$sp+$offset" 0 \
"get value of $name@sp+$offset in $funcname"]
append str "\\s*$name at $addr,?"
if { $name == "blink" } {
set has_blink 1
set blink_addr $addr
}
}
}
if { $has_blink == 1 } {
append str "\\s*pc at $blink_addr"
}
return $str
}
# Arguments:
# funcname - name of function to test
# savedregs - list of register saved in the frame. Each entry can be either
# a string, where it is a register name, or it is a list of two
# items - name of register and it's offset relatively to SP in
# the memory. SP value is at the moment of prologue end.
# fp_offset - if not an empty string, then proc will test that FP register
# has a value that is (SP + offset).
proc prologue_test {funcname {savedregs ""} {fp_offset ""} } {
global hex
gdb_breakpoint $funcname temporary
gdb_continue_to_breakpoint $funcname
gdb_test "backtrace 10" \
"#0\[ \t\]*$hex in $funcname .*\r\n#1\[ \t\]*$hex in main.*" \
"backtrace in $funcname"
if { $savedregs != "" } {
set str [saved_regs_to_str $savedregs $funcname]
gdb_test "info frame" \
".*Saved registers:$str" \
"saved registers in $funcname"
}
if { $fp_offset != "" } {
set sp [get_integer_valueof \$sp -1 "get value of sp in $funcname"]
set fp_val [expr $sp + $fp_offset]
set fp_real_val \
[get_integer_valueof \$fp 0 "get value of fp in $funcname"]
if { $fp_real_val != $fp_val } {
fail "check FP value in $funcname"
} else {
pass "check FP value in $funcname"
}
}
}
prologue_test "standard_prologue" { {r13 0} {r14 4} {r18 8} {blink 12} }
prologue_test "mini_prologue" { {r13 0} {r14 8} {r15 4} {blink 12} }
prologue_test "no_subsp_prologue" { {r13 8} {r20 4} {r25 0} {blink 12} }
prologue_test "leaf_prologue" { {r13 0} {r15 4} }
prologue_test "pushfp_prologue" { {r13 8} {r14 4} {fp 0} } 0
prologue_test "fp_prologue_with_store" { {r13 12} {r14 8} {r15 0} {fp 4} } 4
prologue_test "noncallee_saved_regs_r12_st" { {r12 0} {r13 4} }
# Register offset is specified relatively to SP at the prologue end, so
# "push r12" hasn't been executed at this moment.
prologue_test "noncallee_saved_regs_r12_push" { {r12 0} {r13 4} }
prologue_test "noncallee_saved_regs_r2_push" { {r2 0} {r13 4} }
prologue_test "noncallee_saved_regs_gp_push" { {r25 4} {gp 0} }
prologue_test "noncallee_saved_regs_lp_count" { {r25 4} {lp_count 0} }
prologue_test "noncallee_saved_regs_blink_out_of_prologue" { {r25 8} {gp 4} \
{blink 0}}
# Argument registers are not reported as "saved" regs.
prologue_test "arg_regs_fp" { {r0 12} {r1 8} {r7 4} {r8 0} {fp 16} } 16
prologue_test "arg_regs_fp_mov_s" { {r0 4} {r8 0} {fp 8} } 8
prologue_test "arg_regs_sp" { {r0 0} {r1 4} {r7 8} {r8 12} {r13 16} {r14 20} }
prologue_test "enter_s_nop"
prologue_test "enter_s_blink" { {blink 0} }
prologue_test "enter_s_fp" { {fp 0} } 0
# Layout of registers as stored by enter_s doesn't conform to ARC ABI.
prologue_test "enter_s_r13" { {r13 4} {fp 8} {blink 0} } 0
prologue_test "enter_s_r15" { {r13 0} {r14 4} {r15 8} } 0
# This enter_s saves GP, however because it is not a "calle-saved register",
# GDB will not report it as "saved register" (but maybe it should). GP is at
# offset 56.
prologue_test "enter_s_all" { {r13 4} {r14 8} {r15 12} {r16 16} {r17 20} \
{r18 24} {r19 28} {r20 32} {r21 36} {r22 40} {r23 44} {r24 48} {r25 52} \
{gp 56} {fp 60} {blink 0} } 0
# Test more levels of backtrace.
gdb_breakpoint nested_prologue_inner temporary
gdb_continue_to_breakpoint nested_prologue_inner
gdb_test "backtrace 10" \
"#0\[ \t\]*$hex in nested_prologue_inner .*\r\n#1\[ \t\]*$hex in nested_prologue_outer .*\r\n#2\[ \t\]*$hex in main.*" \
"backtrace in nested_prologue_inner"
set regs [saved_regs_to_str {r13 r18} "nested_prologue_inner"]
gdb_test "info frame" ".*Saved registers:$regs" \
"saved registers in nested_prologue_inner"
set regs [saved_regs_to_str {r14 r15 blink} "nested_prologue_inner"]
gdb_test "info frame 1" ".*Saved registers:$regs" \
"saved registers in nested_prologue_outer"
# sub sp,sp for local variables is part of prologue, hence should be added to
# all of those offsets.
prologue_test "max_length_prologue" { {r0 72} {r1 76} {r2 80} {r3 84} {r4 88} \
{r5 92} {r6 96} {r7 100} {r13 20} {r14 24} {r15 28} {r16 32} \
{r17 36} {r18 40} {r19 44} {r20 48} {r21 52} {r22 56} {r23 60} {r24 64} \
{r25 68} {fp 16} {blink 104} }
prologue_test "branch_in_prologue" { {r13 0} }
prologue_test "cond_branch_in_prologue" { {r13 4} }
prologue_test "jump_in_prologue" { {r13 0} }
prologue_test "cond_jump_in_prologue" { {r13 4} }
prologue_test "predicated_insn" { {r13 8} {r15 0} }
prologue_test "loop_in_prologue" { {r25 4} {lp_count 0} }
prologue_test "store_constant" { {r13 8} {r14 4} }
prologue_test "st_c_limm" { {r15 0} }
prologue_test "st_ab_writeback" { {r13 8} {r14 4} {r15 0} }
prologue_test "st_as_writeback" { {r13 8} {r14 4} {r15 0} }
prologue_test "sth_as_writeback" { {r13 8} {r15 0} }
prologue_test "std_as_writeback" { {r13 12} {r14 4} {r15 8} {r16 0} }
prologue_test "st_halfword" { {r13 8} {r15 0} }
prologue_test "sts_halfword" { {r13 8} {r15 0} }
prologue_test "st_byte" { {r13 8} {r15 0} }
prologue_test "sts_byte" { {r13 8} {r15 0} }
prologue_test "sts_byte_sp" { {r13 8} {r15 0} }
prologue_test "st_double" { {r14 16} {r15 20} {r18 8} {r19 12}}
prologue_test "r_relative_store" { {r13 8} {r14 4} {r15 0} }
prologue_test "r_relative_sub_store" { {r13 8} {r14 4} {r15 0} }
prologue_test "r_relative_store_st_s" { {r13 8} {r14 0} {r15 4} }
prologue_test "r_relative_store_unknown" { {r13 8} }
prologue_test "st_s_r0gp" { {r13 8} }
prologue_test "push_s_prologue" { {r0 28} {r1 16} {r2 4} {r3 24} {r12 32} \
{r13 20} {r14 12} {r15 8} {blink 0}}
prologue_test "sub_s_cbu3" { {r13 4} {r14 0} }
prologue_test "sub_s_bbc" { {r1 4} {r13 12} {r14 0} }
prologue_test "sub_s_bbu5" { {r13 8} {r14 0} }
prologue_test "sub_0bc" { {r13 4} {r14 0} }
prologue_test "sub_alimmb" { {r13 4} {r14 0} }
prologue_test "sub_s_ne_bbb" { {r13 0} }
prologue_test "mov_limm" { {r13 4} {r14 0} }
prologue_test "mov0c_limm" { {r13 4} {r14 0} }
prologue_test "mov_s_hs3" { {r13 4} {r14 0} }
prologue_test "mov_s_bu8" { {r13 4} {r14 0} }
prologue_test "mov_s_ne_bh" { {r13 0} }
prologue_test "unstored_reg" { {r13 0} {r14 4} }
prologue_test "double_store" { {r14 0} }
# alloca() tests
gdb_breakpoint alloca_inner temporary
gdb_continue_to_breakpoint alloca_inner
gdb_test "backtrace 3" \
"#0\[ \t\]*$hex in alloca_inner .*\r\n#1\[ \t\]*$hex in alloca_outer .*\r\n#2\[ \t\]*$hex in main.*" \
"backtrace in alloca_inner"
set regs [saved_regs_to_str {r13 r14} alloca_inner]
gdb_test "info frame 0" ".*Saved registers:$regs" \
"saved registers in alloca_inner"
set regs [saved_regs_to_str {fp blink} alloca_inner]
gdb_test "info frame 1" ".*Saved registers:$regs" \
"saved registers in alloca_outer"
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