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kvm: Drop kvm_patch_opcode_byte (Jan Kiszka) 

As cpu_memory_rw_debug is now capable of modifying ROM, we can drop our
own patch function.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6906 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aliguori 2009-03-28 17:51:40 +00:00
parent 5e2972fdab
commit 64bf3f4eec
1 changed files with 4 additions and 23 deletions
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27
target-i386/kvm.c
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@ -686,31 +686,12 @@ int kvm_arch_handle_exit(CPUState *env, struct kvm_run *run)
}
#ifdef KVM_CAP_SET_GUEST_DEBUG
static int kvm_patch_opcode_byte(CPUState *env, target_ulong addr, uint8_t val)
{
target_phys_addr_t phys_page_addr;
unsigned long pd;
uint8_t *ptr;
phys_page_addr = cpu_get_phys_page_debug(env, addr & TARGET_PAGE_MASK);
if (phys_page_addr == -1)
return -EINVAL;
pd = cpu_get_physical_page_desc(phys_page_addr);
if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM &&
(pd & ~TARGET_PAGE_MASK) != IO_MEM_ROM && !(pd & IO_MEM_ROMD))
return -EINVAL;
ptr = phys_ram_base + (pd & TARGET_PAGE_MASK)
+ (addr & ~TARGET_PAGE_MASK);
*ptr = val;
return 0;
}
int kvm_arch_insert_sw_breakpoint(CPUState *env, struct kvm_sw_breakpoint *bp)
{
const static uint8_t int3 = 0xcc;
if (cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&bp->saved_insn, 1, 0) ||
kvm_patch_opcode_byte(env, bp->pc, 0xcc))
cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&int3, 1, 1))
return -EINVAL;
return 0;
}
@ -720,7 +701,7 @@ int kvm_arch_remove_sw_breakpoint(CPUState *env, struct kvm_sw_breakpoint *bp)
uint8_t int3;
if (cpu_memory_rw_debug(env, bp->pc, &int3, 1, 0) || int3 != 0xcc ||
kvm_patch_opcode_byte(env, bp->pc, bp->saved_insn))
cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&bp->saved_insn, 1, 1))
return -EINVAL;
return 0;
}