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Re: [Qemu-devel] [PATCH] mips: set CP0 Debug DExcCode for SDBBP instruct
From: |
Aurelien Jarno |
Subject: |
Re: [Qemu-devel] [PATCH] mips: set CP0 Debug DExcCode for SDBBP instruction |
Date: |
Sat, 6 May 2017 13:42:14 +0200 |
User-agent: |
NeoMutt/20170113 (1.7.2) |
On 2017-05-02 15:03, Pavel Dovgalyuk wrote:
> From: Pavel Dovgalyuk <address@hidden>
>
> This patch fixes setting DExcCode field of CP0 Debug register
> when SDBBP instruction is executed. According to EJTAG specification,
> this field must be set to the value 9 (Bp).
>
> Signed-off-by: Pavel Dovgalyuk <address@hidden>
> ---
> target/mips/helper.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/target/mips/helper.c b/target/mips/helper.c
> index e359ca3b44..166f0d1243 100644
> --- a/target/mips/helper.c
> +++ b/target/mips/helper.c
> @@ -627,6 +627,8 @@ void mips_cpu_do_interrupt(CPUState *cs)
> goto set_DEPC;
> case EXCP_DBp:
> env->CP0_Debug |= 1 << CP0DB_DBp;
> + /* Setup DExcCode - SDBBP instruction */
> + env->CP0_Debug = (env->CP0_Debug & ~(0x1fULL << CP0DB_DEC)) | 9 <<
> CP0DB_DEC;
> goto set_DEPC;
> case EXCP_DDBS:
> env->CP0_Debug |= 1 << CP0DB_DDBS;
>
Reviewed-by: Aurelien Jarno <address@hidden>
--
Aurelien Jarno GPG: 4096R/1DDD8C9B
address@hidden http://www.aurel32.net