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Fix calldatacopy

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This commit is contained in:
Robin Salen 2023-10-26 15:59:40 -04:00
parent ade5b8c39b
commit 75fdd342f5
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GPG Key ID: FB87BACFB3CB2007
1 changed files with 3 additions and 3 deletions
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6
evm/src/cpu/kernel/asm/memory/syscalls.asm
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@ -80,9 +80,6 @@ calldataload_large_offset:
// stack: expanded_num_bytes, kexit_info, dest_offset, offset, size, kexit_info
DUP1 %ensure_reasonable_offset
%update_mem_bytes
// stack: kexit_info, dest_offset, offset, size, kexit_info
DUP4 DUP4 %add_or_fault // Overflow check
%mload_context_metadata($context_metadata_size) LT %jumpi(fault_exception) // Data len check
%mload_context_metadata($context_metadata_size)
// stack: total_size, kexit_info, dest_offset, offset, size
@ -149,6 +146,9 @@ global sys_calldatacopy:
// Pre stack: kexit_info, dest_offset, offset, size
// Post stack: (empty)
global sys_returndatacopy:
DUP4 DUP4 %add_or_fault // Overflow check
%mload_context_metadata(@CTX_METADATA_RETURNDATA_SIZE) LT %jumpi(fault_exception) // Data len check
%wcopy(@SEGMENT_RETURNDATA, @CTX_METADATA_RETURNDATA_SIZE)
// Pre stack: kexit_info, dest_offset, offset, size