gdb: LoongArch: Restrict breakpoint outside of atomic sequenceHEADmaster

We can't put a breakpoint in the middle of a ll/sc atomic sequence,
so look for the end of the sequence and put the breakpoint there,
it has been handled in the commit 208b57e53ed9 ("gdb: LoongArch:
Deal with atomic sequence").

Especially, maybe there is a conditional branch instruction in the
middle of a ll/sc atomic sequence, its destination address may be
current pc + 4 which is inside the atomic sequence, it should not
put a breakpoint in its destination address in this case, this has
been handled in the commit a4242dc3f5fa ("gdb: LoongArch: Improve
the handling of atomic sequence").

Additionally, if there is a conditional branch instruction in the
middle of a ll/sc atomic sequence, its destination address may be
not current pc + 4 but still inside the atomic sequence, it should
not put a breakpoint in its destination address in this case.

So in order to avoid putting a breakpoint in the middle of a ll/sc
atomic sequence in any case, just look for the start and end of the
sequence, and restrict the breakpoint outside of the atomic sequence.

Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>

0 files changed, 0 insertions, 0 deletions