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plonky2/evm/src/cpu/kernel/asm/memory/syscalls.asm
wborgeaud 06936c7649
Implement various syscalls (#930) 
* Bunch of syscalls

* Minor

* Minor

* Minor

* Add todo for overflow
2023-03-22 06:42:14 +01:00

150 lines
7.9 KiB
NASM
Raw Blame History

global sys_mload:
// stack: kexit_info, offset
DUP2 %ensure_reasonable_offset
// stack: kexit_info, offset
%charge_gas_const(@GAS_VERYLOW)
// stack: kexit_info, offset
DUP2 %add_const(32)
// stack: expanded_num_bytes, kexit_info, offset
%update_mem_bytes
// stack: kexit_info, offset
PUSH 0 // acc = 0
// stack: acc, kexit_info, offset
DUP3 %add_const( 0) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0xf8) ADD
DUP3 %add_const( 1) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0xf0) ADD
DUP3 %add_const( 2) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0xe8) ADD
DUP3 %add_const( 3) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0xe0) ADD
DUP3 %add_const( 4) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0xd8) ADD
DUP3 %add_const( 5) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0xd0) ADD
DUP3 %add_const( 6) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0xc8) ADD
DUP3 %add_const( 7) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0xc0) ADD
DUP3 %add_const( 8) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0xb8) ADD
DUP3 %add_const( 9) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0xb0) ADD
DUP3 %add_const(10) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0xa8) ADD
DUP3 %add_const(11) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0xa0) ADD
DUP3 %add_const(12) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0x98) ADD
DUP3 %add_const(13) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0x90) ADD
DUP3 %add_const(14) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0x88) ADD
DUP3 %add_const(15) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0x80) ADD
DUP3 %add_const(16) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0x78) ADD
DUP3 %add_const(17) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0x70) ADD
DUP3 %add_const(18) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0x68) ADD
DUP3 %add_const(19) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0x60) ADD
DUP3 %add_const(20) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0x58) ADD
DUP3 %add_const(21) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0x50) ADD
DUP3 %add_const(22) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0x48) ADD
DUP3 %add_const(23) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0x40) ADD
DUP3 %add_const(24) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0x38) ADD
DUP3 %add_const(25) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0x30) ADD
DUP3 %add_const(26) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0x28) ADD
DUP3 %add_const(27) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0x20) ADD
DUP3 %add_const(28) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0x18) ADD
DUP3 %add_const(29) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0x10) ADD
DUP3 %add_const(30) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0x08) ADD
DUP3 %add_const(31) %mload_current(@SEGMENT_MAIN_MEMORY) %shl_const(0x00) ADD
%stack (acc, kexit_info, offset) -> (kexit_info, acc)
EXIT_KERNEL
global sys_mstore:
// stack: kexit_info, offset, value
DUP2 %ensure_reasonable_offset
// stack: kexit_info, offset, value
%charge_gas_const(@GAS_VERYLOW)
// stack: kexit_info, offset, value
DUP2 %add_const(32)
// stack: expanded_num_bytes, kexit_info, offset, value
%update_mem_bytes
// stack: kexit_info, offset, value
DUP3 PUSH 0 BYTE DUP3 %add_const( 0) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 1 BYTE DUP3 %add_const( 1) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 2 BYTE DUP3 %add_const( 2) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 3 BYTE DUP3 %add_const( 3) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 4 BYTE DUP3 %add_const( 4) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 5 BYTE DUP3 %add_const( 5) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 6 BYTE DUP3 %add_const( 6) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 7 BYTE DUP3 %add_const( 7) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 8 BYTE DUP3 %add_const( 8) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 9 BYTE DUP3 %add_const( 9) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 10 BYTE DUP3 %add_const(10) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 11 BYTE DUP3 %add_const(11) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 12 BYTE DUP3 %add_const(12) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 13 BYTE DUP3 %add_const(13) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 14 BYTE DUP3 %add_const(14) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 15 BYTE DUP3 %add_const(15) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 16 BYTE DUP3 %add_const(16) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 17 BYTE DUP3 %add_const(17) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 18 BYTE DUP3 %add_const(18) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 19 BYTE DUP3 %add_const(19) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 20 BYTE DUP3 %add_const(20) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 21 BYTE DUP3 %add_const(21) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 22 BYTE DUP3 %add_const(22) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 23 BYTE DUP3 %add_const(23) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 24 BYTE DUP3 %add_const(24) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 25 BYTE DUP3 %add_const(25) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 26 BYTE DUP3 %add_const(26) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 27 BYTE DUP3 %add_const(27) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 28 BYTE DUP3 %add_const(28) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 29 BYTE DUP3 %add_const(29) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 30 BYTE DUP3 %add_const(30) %mstore_current(@SEGMENT_MAIN_MEMORY)
DUP3 PUSH 31 BYTE DUP3 %add_const(31) %mstore_current(@SEGMENT_MAIN_MEMORY)
%stack (kexit_info, offset, value) -> (kexit_info)
EXIT_KERNEL
global sys_mstore8:
// stack: kexit_info, offset, value
DUP2 %ensure_reasonable_offset
// stack: kexit_info, offset, value
%charge_gas_const(@GAS_VERYLOW)
// stack: kexit_info, offset, value
DUP2 %increment
// stack: expanded_num_bytes, kexit_info, offset, value
%update_mem_bytes
// stack: kexit_info, offset, value
%stack (kexit_info, offset, value) -> (offset, value, kexit_info)
%mstore_current(@SEGMENT_MAIN_MEMORY)
// stack: kexit_info
EXIT_KERNEL
global sys_calldataload:
// stack: kexit_info, i
%charge_gas_const(@GAS_VERYLOW)
// stack: kexit_info, i
%stack (kexit_info, i) -> (@SEGMENT_CALLDATA, i, 32, sys_calldataload_after_mload_packing, kexit_info)
GET_CONTEXT
// stack: ADDR: 3, 32, sys_calldataload_after_mload_packing, kexit_info
%jump(mload_packing)
sys_calldataload_after_mload_packing:
// stack: value, kexit_info
SWAP1
EXIT_KERNEL
PANIC
// Macro for {CALLDATA,CODE,RETURNDATA}COPY (W_copy in Yellow Paper).
%macro wcopy(segment)
// stack: kexit_info, dest_offset, offset, size
DUP4 %num_bytes_to_num_words %mul_const(@GAS_COPY) %add_const(@GAS_VERYLOW) %charge_gas
%stack (kexit_info, dest_offset, offset, size) -> (dest_offset, size, dest_offset, offset, size, kexit_info)
ADD // TODO: check for overflow, see discussion here https://github.com/mir-protocol/plonky2/pull/930/files/a4ea0965d79561c345e2f77836c07949c7e0bc69#r1143630253
// stack: expanded_num_bytes, dest_offset, offset, size, kexit_info
DUP1 %ensure_reasonable_offset
%update_mem_bytes
GET_CONTEXT
%stack (context, dest_offset, offset, size, kexit_info) ->
(context, @SEGMENT_MAIN_MEMORY, dest_offset, context, $segment, offset, size, %%after, kexit_info)
%jump(memcpy)
%%after:
// stack: kexit_info
EXIT_KERNEL
%endmacro
global sys_calldatacopy:
%wcopy(@SEGMENT_CALLDATA)
global sys_codecopy:
%wcopy(@SEGMENT_CODE)
global sys_returndatacopy:
%wcopy(@SEGMENT_RETURNDATA)
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