DeforaOS/Asm
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Also implemented branching instructions

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This commit is contained in:
Pierre Pronchery 2011-04-21 17:03:21 +00:00
parent f8312d08fb
commit 8ebf1b07af
2 changed files with 39 additions and 10 deletions
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47
src/arch/sparc.c
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@ -63,6 +63,8 @@ ArchPlugin arch_plugin =
/* functions */ /* functions */
/* plug-in */ /* plug-in */
/* sparc_write */ /* sparc_write */
static int _write_branch(ArchPlugin * plugin, ArchInstruction * instruction,
ArchInstructionCall * call, uint32_t * opcode);
static int _write_integer(ArchPlugin * plugin, ArchInstruction * instruction, static int _write_integer(ArchPlugin * plugin, ArchInstruction * instruction,
ArchInstructionCall * call, uint32_t * opcode); ArchInstructionCall * call, uint32_t * opcode);
static int _write_loadstore(ArchPlugin * plugin, ArchInstruction * instruction, static int _write_loadstore(ArchPlugin * plugin, ArchInstruction * instruction,
@ -75,22 +77,49 @@ static int _sparc_write(ArchPlugin * plugin, ArchInstruction * instruction,
{ {
uint32_t opcode = instruction->opcode; uint32_t opcode = instruction->opcode;
if((opcode & 0xc0000000) == 0xc0000000 && _write_loadstore(plugin, if((opcode & 0xc0000000) == 0xc0000000)
instruction, call, &opcode) != 0) {
if(_write_loadstore(plugin, instruction, call, &opcode) != 0)
return -1;
}
else if((opcode & 0xc1c00000) == 0x01000000)
{
if(_write_sethi(plugin, instruction, call, &opcode) != 0)
return -1;
}
else if((opcode & 0xc0000000) == 0x80000000)
{
if(_write_integer(plugin, instruction, call, &opcode) != 0)
return -1;
}
else if((opcode & 0xc1c00000) == 0x00800000)
{
if(_write_branch(plugin, instruction, call, &opcode) != 0)
return -1;
}
else
return -1; return -1;
else if((opcode & 0x01000000) == 0x01000000 && _write_sethi(plugin,
instruction, call, &opcode) != 0)
return -1;
else if((opcode & 0xc0000000) == 0x80000000 && _write_integer(plugin,
instruction, call, &opcode) != 0)
return -1;
/* FIXME implement the rest */
opcode = _htob32(opcode); opcode = _htob32(opcode);
if(fwrite(&opcode, sizeof(opcode), 1, plugin->helper->fp) != 1) if(fwrite(&opcode, sizeof(opcode), 1, plugin->helper->fp) != 1)
return -1; return -1;
return 0; return 0;
} }
static int _write_branch(ArchPlugin * plugin, ArchInstruction * instruction,
ArchInstructionCall * call, uint32_t * opcode)
{
uint32_t disp;
if(AO_GET_TYPE(instruction->op1) != AOT_IMMEDIATE)
return -1;
disp = call->operands[0].value.immediate.value;
if(call->operands[0].value.immediate.negative)
disp = -disp;
disp &= (0x003fffff);
*opcode |= disp;
return 0;
}
static int _write_integer(ArchPlugin * plugin, ArchInstruction * instruction, static int _write_integer(ArchPlugin * plugin, ArchInstruction * instruction,
ArchInstructionCall * call, uint32_t * opcode) ArchInstructionCall * call, uint32_t * opcode)
{ {

2
test/sparc.S
View File

@ -22,7 +22,7 @@
bge $0x3 bge $0x3
bl $0x3 bl $0x3
ble $0x3 ble $0x3
bne $0x3 bne $0x3 /* 0x12800003 */
bz $0x3 bz $0x3
ld [%r4 + %r7], %r11 ld [%r4 + %r7], %r11
ld [%r23], %r19 ld [%r23], %r19