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Re: [Qemu-devel] [PATCH v2] linux-user: provide frame information in x86

From: Richard Henderson
Subject: Re: [Qemu-devel] [PATCH v2] linux-user: provide frame information in x86-64 safe_syscall
Date: Mon, 6 Jun 2016 14:03:25 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.1.0

On 06/06/2016 11:56 AM, Peter Maydell wrote:
Use cfi directives in the x86-64 safe_syscall to allow gdb to get
backtraces right from within it. (In particular this will be
quite a common situation if the user interrupts QEMU while it's
in a blocked safe-syscall: at the point of the syscall insn RBP
is in use for something else, and so gdb can't find the frame then
without assistance.)

Signed-off-by: Peter Maydell <address@hidden>
Reviewed-by: Richard Henderson <address@hidden>
v1->v2 changes: minor tweaks as requested by rth

Reviewed-by: Richard Henderson <address@hidden>


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