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mips: set CP0 Debug DExcCode for SDBBP instruction

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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).

Backports commit c6c2c0fc32362ba234ae3bdad1a55c2d6aefaa12 from qemu
This commit is contained in:
Pavel Dovgalyuk 2018-03-03 22:45:02 -05:00 committed by Lioncash
parent 0bd8dc4e0a
commit 342fa7135d
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 2 additions and 0 deletions
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2
qemu/target/mips/helper.c
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@ -617,6 +617,8 @@ 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;