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* initial implementation of c startup code for sparc64-linux

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git-svn-id: trunk@36673 -
This commit is contained in:
florian 2017-07-07 22:18:13 +00:00
parent bd57ca99a8
commit 8ce6140476
1 changed files with 75 additions and 4 deletions
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79
rtl/linux/sparc64/si_c.inc
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@ -24,9 +24,6 @@ procedure libc_init; external name '__libc_init';
procedure libc_setfpucw; external name '__setfpucw';
procedure libc_start_main; external name '__libc_start_main';
const
BIAS = 2047;
function fpc_getgot : pointer; [external name 'FPC_GETGOT'];
{******************************************************************************
@ -35,11 +32,85 @@ function fpc_getgot : pointer; [external name 'FPC_GETGOT'];
procedure _FPC_libc_start; assembler; nostackframe; public name '_start';
asm
{ first stack frame }
mov %g0, %fp
{ space for arguments }
sub %sp, 6*8, %sp
{$ifdef FPC_PIC}
call FPC_GETGOT
nop
{$endif FPC_PIC}
{ extract argc }
ldx [%sp+STACK_BIAS+22*8], %o2
{$ifdef FPC_PIC}
{$else FPC_PIC}
sethi %hi(operatingsystem_parameter_argc),%o1
or %o1,%lo(operatingsystem_parameter_argc),%o1
{$endif FPC_PIC}
st %o2, [%o1]
{ extract argv }
{$ifdef FPC_PIC}
{$else FPC_PIC}
add %sp, STACK_BIAS+23*8, %o0
sethi %hi(operatingsystem_parameter_argv),%o1
or %o1,%lo(operatingsystem_parameter_argv),%o1
{$endif FPC_PIC}
stx %o0, [%o1]
{ envp=argv+(argc+1)*8 }
inc %o2
sllx %o2, 3, %o2
add %o2, %o0, %o2
{$ifdef FPC_PIC}
{$else FPC_PIC}
sethi %hi(operatingsystem_parameter_envp),%o1
or %o1,%lo(operatingsystem_parameter_envp),%o1
{$endif FPC_PIC}
stx %o2, [%o1]
{ Save initial stackpointer }
{$ifdef FPC_PIC}
{$else FPC_PIC}
sethi %hi(initialstkptr),%o1
or %o1,%lo(initialstkptr),%o1
{$endif FPC_PIC}
stx %sp, [%o1]
{ prepare parameters to call __libc_start_main }
ldx [%sp+STACK_BIAS+22*8], %o1
add %sp, STACK_BIAS+23*8, %o0
{$ifdef FPC_PIC}
{$else FPC_PIC}
sethi %hi(PASCALMAIN), %o0
or %o0, %lo(PASCALMAIN), %o0
{$endif FPC_PIC}
{$ifdef FPC_PIC}
{$else FPC_PIC}
sethi %hi(libc_init_proc), %o3
or %o3, %lo(libc_init_proc), %o3
{$endif FPC_PIC}
{$ifdef FPC_PIC}
{$else FPC_PIC}
sethi %hi(libc_fini_proc), %o4
or %o4, %lo(libc_fini_proc), %o4
{$endif FPC_PIC}
{ shared library termination function }
mov %g1, %o5
call libc_start_main
nop
{ we shuld never return here }
unimp
end;
procedure _FPC_libc_haltproc(e: longint); cdecl; public name '_haltproc';
begin
libc_exit(e);
{ try to exit_group }
while true do
asm