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Fixed stack checking for embedded target. Based on work by Christo Crause

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git-svn-id: trunk@42157 -
(cherry picked from commit 2f501be2a0)
This commit is contained in:
Jeppe Johansen 2019-06-01 19:18:31 +00:00 committed by florian
parent 915e48c675
commit ebe4d4cf13
3 changed files with 18 additions and 2 deletions
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2
rtl/avr/avr.inc
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@ -113,6 +113,8 @@ function get_caller_frame(framebp:pointer;addr:pointer=nil):pointer;assembler;no
{$define FPC_SYSTEM_HAS_SPTR}
Function Sptr : pointer;assembler;nostackframe;
asm
in r24, 0x3d
in r25, 0x3e
end;

14
rtl/embedded/system.pp
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@ -20,6 +20,8 @@ Unit System;
interface
{*****************************************************************************}
{$define FPC_SYSTEM_HAS_STACKTOP}
{$define FPC_IS_SYSTEM}
{$define HAS_CMDLINE}
@ -202,6 +204,14 @@ const calculated_cmdline:Pchar=nil;
{*****************************************************************************
Misc. System Dependent Functions
*****************************************************************************}
var
_stack_top: record end; external name '_stack_top';
function StackTop: pointer;
begin
StackTop:=@_stack_top;
end;
procedure haltproc;cdecl;external name '_haltproc';
@ -276,7 +286,7 @@ begin
end;
var
initialstkptr : Pointer; // external name '__stkptr';
initialstkptr : record end; external name '_stack_top';
{$endif FPC_HAS_FEATURE_STACKCHECK}
begin
@ -293,7 +303,7 @@ begin
{$ifdef FPC_HAS_FEATURE_STACKCHECK}
StackLength := CheckInitialStkLen(initialStkLen);
StackBottom := initialstkptr - StackLength;
StackBottom := @initialstkptr - StackLength;
{$endif FPC_HAS_FEATURE_STACKCHECK}
{$ifdef FPC_HAS_FEATURE_EXCEPTIONS}

4
rtl/inc/system.inc
View File

@ -44,7 +44,11 @@ type
{$endif FPC_HAS_FEATURE_TEXTIO}
const
{$ifdef CPUAVR}
STACK_MARGIN = 64; { Stack size margin for stack checking }
{$else}
STACK_MARGIN = 16384; { Stack size margin for stack checking }
{$endif}
{ Random / Randomize constants }
OldRandSeed : Cardinal = 0;