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* Additionally, use a branchless sequence to fix up result of longjmp. git-svn-id: trunk@26238 -
55 lines
1.7 KiB
PHP
55 lines
1.7 KiB
PHP
{
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This file is part of the Free Pascal run time library.
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Copyright (c) 1999-2000 by the Free Pascal development team
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SetJmp and LongJmp implementation for exception handling
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See the file COPYING.FPC, included in this distribution,
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for details about the copyright.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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**********************************************************************}
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Function fpc_SetJmp (Var S : Jmp_buf) : longint;assembler;nostackframe;[Public, alias : 'FPC_SETJMP']; compilerproc;
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asm
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movl %ebx,Jmp_buf.ebx(%eax)
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movl %esi,Jmp_buf.esi(%eax)
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movl %edi,Jmp_buf.edi(%eax)
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movl %ebp,Jmp_buf.bp(%eax)
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leal 4(%esp),%edi
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movl %edi,Jmp_buf.sp(%eax)
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movl (%esp),%edi
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movl %edi,Jmp_buf.pc(%eax)
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{$ifdef FPC_USE_WIN32_SEH}
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movl %fs:(0),%edi
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movl %edi,Jmp_buf.exhead(%eax)
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{$endif FPC_USE_WIN32_SEH}
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movl Jmp_buf.edi(%eax),%edi
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xorl %eax,%eax
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end;
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Procedure fpc_longJmp (Var S : Jmp_buf; value : longint); assembler;nostackframe;[Public, alias : 'FPC_LONGJMP']; compilerproc;
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asm
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xchgl %edx,%eax
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cmpl $1,%eax
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adcl $0,%eax // if result<1 then inc(result) -- never return zero.
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{$ifdef FPC_USE_WIN32_SEH}
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movl Jmp_buf.exhead(%edx),%edi
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movl %edi,%fs:(0)
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{$endif FPC_USE_WIN32_SEH}
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movl Jmp_buf.ebx(%edx),%ebx
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movl Jmp_buf.esi(%edx),%esi
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movl Jmp_buf.edi(%edx),%edi
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movl Jmp_buf.bp(%edx),%ebp
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movl Jmp_buf.sp(%edx),%esp
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// we should also clear the fpu
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// fninit no must be done elsewhere PM
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// or we should reset the control word also
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jmp Jmp_buf.pc(%edx)
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end;
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