Revision 64bf3f4e target-i386/kvm.c
| b/target-i386/kvm.c | ||
|---|---|---|
| 686 | 686 |
} |
| 687 | 687 |
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| 688 | 688 |
#ifdef KVM_CAP_SET_GUEST_DEBUG |
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static int kvm_patch_opcode_byte(CPUState *env, target_ulong addr, uint8_t val) |
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{
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target_phys_addr_t phys_page_addr; |
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unsigned long pd; |
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uint8_t *ptr; |
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phys_page_addr = cpu_get_phys_page_debug(env, addr & TARGET_PAGE_MASK); |
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if (phys_page_addr == -1) |
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return -EINVAL; |
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pd = cpu_get_physical_page_desc(phys_page_addr); |
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if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM && |
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(pd & ~TARGET_PAGE_MASK) != IO_MEM_ROM && !(pd & IO_MEM_ROMD)) |
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return -EINVAL; |
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ptr = phys_ram_base + (pd & TARGET_PAGE_MASK) |
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+ (addr & ~TARGET_PAGE_MASK); |
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*ptr = val; |
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return 0; |
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} |
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int kvm_arch_insert_sw_breakpoint(CPUState *env, struct kvm_sw_breakpoint *bp) |
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{
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const static uint8_t int3 = 0xcc; |
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if (cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&bp->saved_insn, 1, 0) || |
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kvm_patch_opcode_byte(env, bp->pc, 0xcc))
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cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&int3, 1, 1))
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return -EINVAL; |
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return 0; |
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} |
| ... | ... | |
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uint8_t int3; |
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if (cpu_memory_rw_debug(env, bp->pc, &int3, 1, 0) || int3 != 0xcc || |
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kvm_patch_opcode_byte(env, bp->pc, bp->saved_insn))
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cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&bp->saved_insn, 1, 1))
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| 724 | 705 |
return -EINVAL; |
| 725 | 706 |
return 0; |
| 726 | 707 |
} |
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