Thanks.
So the following will give an address+frame of the calling routine ?
get_caller_addr(get_frame), get_caller_frame(get_frame)
Dennis
Sven Barth via fpc-pascal wrote:
Dennis <de...@avidsoft.com.hk <mailto:de...@avidsoft.com.hk>> schrieb
am Mi., 18. Juli 2018, 17:19:
The following delphi code when compiled by FPC, raised these errors:
Compile Project, Target: lib\x86_64-win64\Project1.exe: Exit code 1,
Errors: 10, Warnings: 2
StrBuffer.pas(100,19) Error: Unknown identifier "EAX"
StrBuffer.pas(100,23) Error: Assembler syntax error in operand
StrBuffer.pas(100,24) Error: Unknown identifier "EBP"
StrBuffer.pas(100,29) Error: Invalid constant expression
StrBuffer.pas(100,29) Error: Invalid reference syntax
StrBuffer.pas(100,29) Warning: No size specified and unable to
determine
the size of the operands, using DWORD as default
StrBuffer.pas(207,19) Error: Unknown identifier "EAX"
StrBuffer.pas(207,23) Error: Assembler syntax error in operand
StrBuffer.pas(207,24) Error: Unknown identifier "EBP"
StrBuffer.pas(207,29) Error: Invalid constant expression
StrBuffer.pas(207,29) Error: Invalid reference syntax
StrBuffer.pas(207,29) Warning: No size specified and unable to
determine
the size of the operands, using DWORD as default
Can anyone help me?
class procedure TStrBuffer.Error(const Msg: string; Data: Integer);
function ReturnAddr: Pointer;
asm
MOV EAX,[EBP+4]
end;
begin
raise EListError.CreateFmt(Msg, [Data])at ReturnAddr;
end;
There are two ways to solve this.
The first one is an easy one, however the code still won't be platform
independent due to the assembly code. For this simply add "{$asmmode
intel}" at the top.
The second solution is cross platform and with correct checks also
Delphi compatible:
=== code begin ===
raise EListError.CreateFmt(Msg, [Data]) at
{$ifdef fpc}
get_caller_addr(get_frame),
get_caller_frame(get_frame)
{$else}
ReturnAddr
{$endif} ;
=== code end ===
Disable the ReturnAddr function also with "{$ifndef fpc}...{$endif}"
and you should be set.
Regards,
Sven
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