f9d67f435f
arm_pc_is_thumb. (arm_pc_is_thumb): Use arm_find_mapping_symbol. (extend_buffer_earlier): New function. (MAX_IT_BLOCK_PREFIX, IT_SCAN_THRESHOLD): New constants. (arm_adjust_breakpoint_address): New function. (arm_gdbarch_init): Register arm_adjust_breakpoint_address. testsuite/ * gdb.arch/thumb2-it.S (it_breakpoints): New function. * gdb.arch/thumb2-it.exp (test_it_break): New function. (Top level): Call it.
182 lines
3.9 KiB
ArmAsm
182 lines
3.9 KiB
ArmAsm
/* Thumb-2 IT blocks test program.
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Copyright 2010 Free Software Foundation, Inc.
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This file is part of GDB.
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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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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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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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.syntax unified
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.text
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.p2align 2
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.code 16
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#ifndef __thumb2__
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.type main,%function
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.thumb_func
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.globl main
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main:
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mov r0, #0
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bx lr @ No Thumb-2
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#else
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.type main,%function
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.thumb_func
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.globl main
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main:
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mov r0, #0
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bx lr @ Thumb-2 OK
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@ One conditional instruction, executed.
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.type it_1,%function
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.thumb_func
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it_1:
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mov r0, #0 @ Setup
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cmp r0, #0 @ Setup
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it eq @ IT instruction, Expected == 1
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addeq r0, #1 @ Reached
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bx lr @ Done
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@ One conditional instruction, skipped.
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.type it_2,%function
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.thumb_func
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it_2:
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mov r0, #0 @ Setup
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cmp r0, #0 @ Setup
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it ne @ IT instruction, Expected == 0
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addne r0, #1 @ Not reached
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bx lr @ Done, Check $r0 == 0
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@ Block of four, alternating, starting with executed.
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.type it_3,%function
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.thumb_func
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it_3:
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mov r0, #0 @ Setup
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cmp r0, #0 @ Setup
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itete ge @ IT instruction, Expected == 2
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addge r0, #1 @ Reached
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addlt r0, #2 @ Not reached
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addge r0, #4 @ Reached
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addlt r0, #8 @ Not reached
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bx lr @ Done, Check $r0 == 5
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@ Block of four, changing flags.
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.type it_4,%function
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.thumb_func
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it_4:
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mov r0, #0 @ Setup
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cmp r0, #0 @ Setup
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itttt ge @ IT instruction, Expected == 2
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addge r0, #1 @ Reached
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cmpge r0, #10 @ Reached
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addge r0, #4 @ Not reached
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addge r0, #8 @ Not reached
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bx lr @ Done, Check $r0 == 1
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@ Block of two, ending with taken branch.
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.type it_5,%function
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.thumb_func
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it_5:
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mov r0, #0 @ Setup
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cmp r0, #0 @ Setup
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itt ge @ IT instruction, Expected == 2
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addge r0, #1 @ Reached
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bge .L5 @ Reached
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add r0, #2 @ Never reached
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.L5: bx lr @ Done, Check $r0 == 1
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@ Block of two, ending with untaken branch.
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.type it_6,%function
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.thumb_func
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it_6:
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mov r0, #0 @ Setup
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cmp r0, #0 @ Setup
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ite ge @ IT instruction, Expected == 2
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addge r0, #1 @ Reached
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blt .L6 @ Not reached
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add r0, #2 @ Reached
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.L6: bx lr @ Done, Check $r0 == 3
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@ Block of four, taken, of different sizes
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.type it_7,%function
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.thumb_func
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it_7:
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mov r0, #0 @ Setup
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cmp r0, #0 @ Setup
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itttt ge @ IT instruction, Expected == 4
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addge.n r0, #1 @ Reached
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addge.w r0, #2 @ Reached
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addge.n r0, #4 @ Reached
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addge.w r0, #8 @ Reached
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bx lr @ Done, Check $r0 == 15
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@ Block of four, only first executed.
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.type it_3,%function
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.thumb_func
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it_8:
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mov r0, #0 @ Setup
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cmp r0, #0 @ Setup
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iteee ge @ IT instruction, Expected == 1
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addge r0, #1 @ Reached
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addlt r0, #2 @ Not reached
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addlt r0, #4 @ Not reached
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addlt r0, #8 @ Not reached
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bx lr @ Done, Check $r0 == 1
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.type it_breakpoints,%function
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.thumb_func
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it_breakpoints:
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mov r0, #0
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cmp r0, #0
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it eq @ Location 1 @ Break 1
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moveq r0, #0
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it eq @ Location 2
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moveq r0, #0 @ Break 2
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it ne @ Location 3
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movne r0, #0 @ Break 3
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@ An IT block of maximum size.
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itttt eq @ Location 4
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moveq.w r0, #0
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moveq.w r0, #0
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moveq.w r0, #0
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moveq.w r0, #0 @ Break 4
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@ Just outside an IT block.
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it eq
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moveq r0, #0
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mov r0, #0 @ Location 5 @ Break 5
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@ After something that looks like an IT block, but
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@ is the second half of an instruction.
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.p2align 6
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cmp r0, r0
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b 1f
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b.w .+0xe14 @ 0xf000 0xbf08 -> second half is IT EQ
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1: mov r0, #0 @ Location 6 @ Break 6
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@ After something that looks like an IT block, but
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@ is data.
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.p2align 6
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b 1f
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.short 0xbf08
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1: mov r0, #0 @ Location 7 @ Break 7
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bx lr
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#endif /* __thumb2__ */
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