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Fix CALLDATALOAD for large offsets (#1085)

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wborgeaud 2023-06-08 12:08:02 +02:00 committed by GitHub
parent f852984e07
commit 68b15ea503
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6
evm/src/cpu/kernel/asm/memory/syscalls.asm
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@ -110,6 +110,9 @@ global sys_calldataload:
// stack: kexit_info, i
%charge_gas_const(@GAS_VERYLOW)
// stack: kexit_info, i
%mload_context_metadata(@CTX_METADATA_CALLDATA_SIZE)
%stack (calldata_size, kexit_info, i) -> (calldata_size, i, kexit_info, i)
LT %jumpi(calldataload_large_offset)
%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
@ -119,6 +122,9 @@ sys_calldataload_after_mload_packing:
SWAP1
EXIT_KERNEL
PANIC
calldataload_large_offset:
%stack (kexit_info, i) -> (kexit_info, 0)
EXIT_KERNEL
// Macro for {CALLDATA,CODE,RETURNDATA}COPY (W_copy in Yellow Paper).
%macro wcopy(segment, context_metadata_size)