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FpDebug: Linux, Use unit "SysCall" rather than "external name". Provide option to define FPDEBUG_USE_LIBC to force use of libc instead of DoSysCall (related to issue #40575)

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This commit is contained in:
Martin 2024-01-11 17:07:58 +01:00
parent 8c268c4992
commit 9700c1459b
1 changed files with 32 additions and 27 deletions
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59
components/fpdebug/fpdbglinuxextra.pas
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@ -7,11 +7,19 @@ interface
uses
Classes,
BaseUnix,
{$ifdef linux}
{$ifdef linux}{$ifNdef FPDEBUG_USE_LIBC}
SysCall,
{$endif}
{$endif}{$endif}
SysUtils;
{$ifdef darwin}
{$DEFINE FPDEBUG_USE_LIBC}
{$else}
{$IF not declared(Do_SysCall)}
{$IFDEF SUNOS} {$DEFINE FPDEBUG_USE_LIBC} {$ENDIF}
{$ENDIF}
{$endif}
const
PTRACE_TRACEME = 0;
PTRACE_PEEKTEXT = 1;
@ -56,24 +64,27 @@ function fpPTrace(ptrace_request: cint; pid: TPid; addr: Pointer; data: pointer)
implementation
type
// all platforms, cint=32-bit.
// On platforms with off_t =64-bit, people should
// use int64, and typecast all calls that don't
// return off_t to cint.
{$ifdef cpux86_64}
TSysResult = int64;
TSysParam = int64;
{$else}
TSysResult = cint32;
TSysParam = cint32;
{$endif cpux86_64}
{$ifdef FPDEBUG_USE_LIBC}
(* ** ptrace ** *)
{$ifdef darwin}
Function ptrace(ptrace_request: cInt; pid: TPid; addr:pointer; data:pointer): cint; cdecl; external clib name 'ptrace';
{$endif darwin}
{$ifdef linux}
function Do_SysCall(sysnr,param1,param2,param3,param4:TSysParam):TSysResult; {$ifdef cpui386}register;{$endif} external name 'FPC_SYSCALL4';
function fpPTrace(ptrace_request: cint; pid: TPid; addr: Pointer; data: pointer): PtrInt; inline;
begin
result := ptrace(ptrace_request, pid, addr, data);
end;
{$else} // FPDEBUG_USE_LIBC
{$IF not declared(Do_SysCall)}
(* ** ptrace not available ** *)
function fpPTrace(ptrace_request: cint; pid: TPid; addr: Pointer; data: pointer): PtrInt; inline;
begin
raise Exception.Create('not supported');
end;
{$else} // not declared(Do_SysCall)
(* ** Use Do_SysCall ** *)
const
{$ifdef cpux86_64}
@ -82,19 +93,11 @@ const
syscall_nr_ptrace = 26;
{$endif}
{$endif linux}
function fpPTrace(ptrace_request: cint; pid: TPid; addr: Pointer; data: pointer): PtrInt;
{$ifdef linux}
var
res : TSysResult;
ret : PtrInt;
{$endif linux}
begin
{$ifdef darwin}
result := ptrace(ptrace_request, pid, addr, data);
{$endif}
{$ifdef linux}
if (ptrace_request > 0) and (ptrace_request < 4) then
data := @ret;
@ -106,8 +109,10 @@ begin
end
else
result := res;
{$endif linux}
end;
{$endif} // declared(Do_SysCall)
{$endif FPDEBUG_USE_LIBC}
end.