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From: | Marek Dolata - address@hidden |
Subject: | [PATCH] /target/i386: fix gdbstub k_gs_base issue |
Date: | Fri, 27 Dec 2019 02:41:29 +0000 |
Fixes: corrects clobbering of registers appearing after k_gs_base Buglink: https://bugs.launchpad.net/qemu/+bug/1857640 Signed-off-by: Marek Dolata <address@hidden> --- target/i386/gdbstub.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/target/i386/gdbstub.c b/target/i386/gdbstub.c index aef25b70f1..7228d20674 100644 --- a/target/i386/gdbstub.c +++ b/target/i386/gdbstub.c @@ -350,14 +350,16 @@ int x86_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n) env->segs[R_GS].base = ldl_p(mem_buf); return 4; -#ifdef TARGET_X86_64 case IDX_SEG_REGS + 8: +#ifdef TARGET_X86_64 if (env->hflags & HF_CS64_MASK) { env->kernelgsbase = ldq_p(mem_buf); return 8; } env->kernelgsbase = ldl_p(mem_buf); return 4; +#else + return 4; #endif case IDX_FP_REGS + 8: -- 2.21.0 |
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