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authorTom de Vries <tdevries@suse.de>2021-01-19 13:31:12 +0100
committerTom de Vries <tdevries@suse.de>2021-01-19 13:31:12 +0100
commit148521232871c8017c973b3c0cc29c8ac7b96134 (patch)
tree872eed9f1dc0af8f2d6ea793dc7944dbd8dea24d /gdb/producer.h
parent0c4e2c6c88e9e67ca39f4f2e3bdb205b4f4a1e6c (diff)
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[gdb/testsuite] Fix gdb.base/step-over-syscall.exp with -m32
When executing test-case gdb.base/step-over-syscall.exp with target board unix/-m32, we run into: ... (gdb) x/2i $pc^M => 0xf7fd5155 <__kernel_vsyscall+5>: sysenter ^M 0xf7fd5157 <__kernel_vsyscall+7>: int $0x80^M (gdb) PASS: gdb.base/step-over-syscall.exp: fork: displaced=off: \ pc before/after syscall instruction stepi^M [Detaching after fork from child process 23593]^M 0xf7fd5159 in __kernel_vsyscall ()^M 1: x/i $pc^M => 0xf7fd5159 <__kernel_vsyscall+9>: pop %ebp^M (gdb) PASS: gdb.base/step-over-syscall.exp: fork: displaced=off: stepi fork insn print /x $pc^M $2 = 0xf7fd5159^M (gdb) PASS: gdb.base/step-over-syscall.exp: fork: displaced=off: pc after stepi FAIL: gdb.base/step-over-syscall.exp: fork: displaced=off: \ pc after stepi matches insn addr after syscall ... The test tries to verify that after doing a stepi at a syscall insn, the $pc is matching the insn after the syscall insn. However, in the case that the syscall insn is "sysenter", the stepi will land further away, so in this case: ... 0xf7fd5155 <__kernel_vsyscall+5>: sysenter ^M 0xf7fd5157 <__kernel_vsyscall+7>: int $0x80^M 0xf7fd5159 <__kernel_vsyscall+9>: pop %ebp^M ... the stepi will land at 0xf7fd5159 instead of 0xf7fd5157. Fix this by detecting the sysenter/int sequence and adjusting the expected pc. Tested on x86_64-linux. gdb/testsuite/ChangeLog: 2021-01-19 Tom de Vries <tdevries@suse.de> * gdb.base/step-over-syscall.exp: Detect and handle sysenter/int sequence.
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