diff options
| author | Peter Xu <peterx@redhat.com> | 2020-04-14 21:06:25 +0100 |
|---|---|---|
| committer | Alex Bennée <alex.bennee@linaro.org> | 2020-04-15 11:38:23 +0100 |
| commit | bbc40fefcee0d69d61ceaf8c0695d2ce43cdc87b (patch) | |
| tree | 7e30fff9c79eccf1f0fe4c2e6fcd359e5822f93c /target/i386/gdbstub.c | |
| parent | 4b27f9b08352c502ff982df30866063f3025d0ac (diff) | |
gdbstub: i386: Fix gdb_get_reg16() parameter to unbreak gdb
We should only pass in gdb_get_reg16() with the GByteArray* object
itself, no need to shift. Without this patch, gdb remote attach will
crash QEMU:
(gdb) target remote :1234
Remote debugging using :1234
Remote communication error. Target disconnected.: Connection reset by peer.
$ qemu-system-x86_64 -m 1G -smp 4 ... -s
ERROR:qemu/gdbstub.c:1843:handle_read_all_regs: assertion failed: (len == gdbserver_state.mem_buf->len)
Bail out! ERROR:qemu/gdbstub.c:1843:handle_read_all_regs: assertion failed: (len == gdbserver_state.mem_buf->len)
Fixes: a010bdbe719 ("extend GByteArray to read register helpers")
Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200409164954.36902-3-peterx@redhat.com>
Message-Id: <20200414200631.12799-12-alex.bennee@linaro.org>
Diffstat (limited to 'target/i386/gdbstub.c')
| -rw-r--r-- | target/i386/gdbstub.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/target/i386/gdbstub.c b/target/i386/gdbstub.c index f3d23b614e..b98a99500a 100644 --- a/target/i386/gdbstub.c +++ b/target/i386/gdbstub.c @@ -106,7 +106,7 @@ int x86_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n) } else if (n >= IDX_FP_REGS && n < IDX_FP_REGS + 8) { floatx80 *fp = (floatx80 *) &env->fpregs[n - IDX_FP_REGS]; int len = gdb_get_reg64(mem_buf, cpu_to_le64(fp->low)); - len += gdb_get_reg16(mem_buf + len, cpu_to_le16(fp->high)); + len += gdb_get_reg16(mem_buf, cpu_to_le16(fp->high)); return len; } else if (n >= IDX_XMM_REGS && n < IDX_XMM_REGS + CPU_NB_REGS) { n -= IDX_XMM_REGS; |