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Fixed the "tableswitch" instruction

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This commit is contained in:
Pierre Pronchery 2011-12-01 02:59:09 +00:00
parent 1738084a28
commit 509e571cba
2 changed files with 17 additions and 3 deletions
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18
src/arch/java.c
View File

@ -40,6 +40,7 @@ static ArchRegister _java_registers[] =
#define OP_U16 AO_IMMEDIATE(0, 16, 0)
#define OP_U16_STR AO_IMMEDIATE(0, 16, AOI_REFERS_STRING)
#define OP_U16_FUNC AO_IMMEDIATE(0, 16, AOI_REFERS_FUNCTION)
#define OP_S32 AO_IMMEDIATE(AOF_SIGNED, 32, 0)
#define OP_U32 AO_IMMEDIATE(0, 32, 0)
static ArchInstruction _java_instructions[] =
{
@ -229,7 +230,7 @@ static ArchInstruction _java_instructions[] =
{ "monitorenter",0xc2, OP1F, AO_0() },
{ "monitorexit",0xc3, OP1F, AO_0() },
{ "multianewarray",0xc5,OP1F, AO_2(OP_U16, OP_U8) },
{ "new", 0xbb, OP1F, AO_1(OP_U16) },
{ "new", 0xbb, OP1F, AO_1(OP_U16_STR) },
{ "newarray", 0xbb, OP1F, AO_1(OP_U8) },
{ "nop", 0x00, OP1F, AO_0() },
{ "pop", 0x57, OP1F, AO_0() },
@ -242,7 +243,7 @@ static ArchInstruction _java_instructions[] =
{ "sastore", 0x56, OP1F, AO_0() },
{ "sipush", 0x11, OP1F, AO_1(OP_U16) },
{ "swap", 0x5f, OP1F, AO_0() },
{ "tableswitch",0xaa, OP1F, AO_0() },
{ "tableswitch",0xaa, OP1F, AO_3(OP_U32, OP_S32, OP_S32) },
{ "wide", 0xc4, OP1F, AO_2(OP_U8, OP_U16) },
{ "wide", 0xc4, OP1F, AO_3(OP_U8, OP_U8, OP_U16) },
{ "xxxunusedxxx",0xba, OP1F, AO_0() },
@ -290,6 +291,7 @@ static int _java_encode(ArchPlugin * plugin, ArchInstruction * instruction,
if((helper->write(helper->arch, &instruction->opcode, 1)) != 1)
return -1;
/* FIXME tableswitch may need some padding */
definitions[0] = instruction->op1;
definitions[1] = instruction->op2;
definitions[2] = instruction->op3;
@ -334,6 +336,8 @@ static int _java_decode(ArchPlugin * plugin, ArchInstructionCall * call)
uint16_t u16;
uint32_t u32;
AsmString * as;
uint32_t begin;
uint32_t end;
if(helper->read(helper->arch, &u8, sizeof(u8)) != sizeof(u8))
return -1;
@ -400,5 +404,15 @@ static int _java_decode(ArchPlugin * plugin, ArchInstructionCall * call)
}
}
call->operands_cnt = i;
/* tableswitch may be followed by offsets */
if(ai->opcode == 0xaa)
{
for(begin = call->operands[1].value.immediate.value,
end = call->operands[2].value.immediate.value;
begin <= end; begin++)
if(helper->read(helper->arch, &u32, sizeof(u32))
!= (ssize_t)sizeof(u32))
return -1;
}
return 0;
}

2
test/java.S
View File

@ -199,7 +199,7 @@
sastore
sipush $0x01
swap
tableswitch
tableswitch $0x0, $0x0, $0x0
wide $0x01, $0x02
wide $0x01, $0x02, $0x03
xxxunusedxxx