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m68k: yet another attempt to fix small struct alignments on stack

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git-svn-id: trunk@36605 -
This commit is contained in:
Károly Balogh 2017-06-27 02:36:55 +00:00
parent 8a8753eb79
commit 02ed753fab
2 changed files with 27 additions and 9 deletions
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6
compiler/m68k/cgcpu.pas
View File

@ -372,6 +372,7 @@ unit cgcpu;
var
len : tcgint;
ofs : tcgint;
href : treference;
begin
{ cgpara.size=OS_NO requires a copy on the stack }
@ -384,7 +385,10 @@ unit cgcpu;
cgpara.check_simple_location;
len:=align(cgpara.intsize,cgpara.alignment);
g_stackpointer_alloc(list,len);
reference_reset_base(href,NR_STACK_POINTER_REG,0,cgpara.alignment,[]);
ofs:=0;
if (cgpara.intsize<cgpara.alignment) then
ofs:=cgpara.alignment-cgpara.intsize;
reference_reset_base(href,NR_STACK_POINTER_REG,ofs,cgpara.alignment,[]);
g_concatcopy(list,r,href,cgpara.intsize);
end
else

30
compiler/m68k/cpupara.pas
View File

@ -50,6 +50,7 @@ unit cpupara;
function get_volatile_registers_int(calloption:tproccalloption):tcpuregisterset;override;
function get_volatile_registers_address(calloption:tproccalloption):tcpuregisterset;override;
function get_volatile_registers_fpu(calloption:tproccalloption):tcpuregisterset;override;
function get_para_align(calloption : tproccalloption):byte;override;
private
function parse_loc_string_to_register(var locreg: tregister; const s : string): boolean;
function create_stdcall_paraloc_info(p : tabstractprocdef; side: tcallercallee; paras: tparalist;
@ -94,6 +95,11 @@ unit cpupara;
Result:=VOLATILE_FPUREGISTERS;
end;
function tcpuparamanager.get_para_align(calloption : tproccalloption):byte;
begin
result:=target_info.stackalign;
end;
function tcpuparamanager.param_use_paraloc(const cgpara:tcgpara):boolean;
var
paraloc : pcgparalocation;
@ -286,9 +292,14 @@ unit cpupara;
paradef : tdef;
i : longint;
firstparaloc : boolean;
paraalign : shortint;
begin
result:=0;
if paras.count=0 then
exit;
paraalign:=get_para_align(p.proccalloption);
for i:=0 to paras.count-1 do
begin
@ -339,7 +350,7 @@ unit cpupara;
end;
end;
hp.paraloc[side].alignment:=target_info.stackalign; //std_param_align;
hp.paraloc[side].alignment:=paraalign;
hp.paraloc[side].size:=paracgsize;
hp.paraloc[side].intsize:=paralen;
hp.paraloc[side].def:=paradef;
@ -387,10 +398,10 @@ unit cpupara;
begin
paraloc^.reference.index:=NR_FRAME_POINTER_REG;
inc(paraloc^.reference.offset,target_info.first_parm_offset);
{ M68K is a big-endian target }
if (paralen<target_info.stackalign{tcgsize2size[OS_INT]}) then
inc(paraloc^.reference.offset,target_info.stackalign-paralen);
end;
{ M68K is a big-endian target }
if (paralen<paraalign) then
inc(paraloc^.reference.offset,paraalign-paralen);
inc(cur_stack_offset,align(paralen,target_info.stackalign));
paralen := 0;
@ -421,12 +432,13 @@ unit cpupara;
rt: tregistertype;
begin
result:=0;
if paras.count=0 then
exit;
parareg:=0;
addrparareg:=0;
floatparareg:=0;
if paras.count=0 then
exit;
paraalign:=get_para_align(p.proccalloption);
{ clean up here so we can later detect properly if a parameter has been
@ -533,6 +545,8 @@ unit cpupara;
paraloc^.reference.index:=NR_FRAME_POINTER_REG;
varalign:=used_align(size_2_align(paralen),paraalign,paraalign);
paraloc^.reference.offset:=cur_stack_offset;
if (paralen<paraalign) then
inc(paraloc^.reference.offset,paraalign-paralen);
if side=calleeside then
inc(paraloc^.reference.offset,target_info.first_parm_offset);
cur_stack_offset:=align(cur_stack_offset+paralen,varalign);
@ -575,8 +589,8 @@ unit cpupara;
varalign:=used_align(size_2_align(l),paraalign,paraalign);
paraloc^.reference.offset:=cur_stack_offset;
{ M68K is a big-endian target }
if (paralen<tcgsize2size[OS_INT]) then
inc(paraloc^.reference.offset,4-paralen);
if (paralen<paraalign) then
inc(paraloc^.reference.offset,paraalign-paralen);
if side=calleeside then
inc(paraloc^.reference.offset,target_info.first_parm_offset);
cur_stack_offset:=align(cur_stack_offset+l,varalign);