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freebsd-dev/lib/libc/sparc64/sys/__sparc_utrap_gen.S

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Add libc side of user trap handling. Add support for handling floating point disabled traps mostly in userland for the simple single threaded case. Not yet enabled by default. Implement __sparc_utrap_install as specified by the sparc abi.
2002-01-01 21:58:32 +00:00
/*-
* Copyright (c) 2001 Jake Burkholder.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
Use FBSDID
2002-06-30 05:36:49 +00:00
#include <machine/asm.h>
__FBSDID("$FreeBSD$");
Add libc side of user trap handling. Add support for handling floating point disabled traps mostly in userland for the simple single threaded case. Not yet enabled by default. Implement __sparc_utrap_install as specified by the sparc abi.
2002-01-01 21:58:32 +00:00
.register %g2, #ignore
.register %g3, #ignore
.register %g6, #ignore
.register %g7, #ignore
Add space for %fsr and %tstate to utrapframe. Save them in the generic user trap entry code. Restore %asi and %ccr from the saved %tstate before returning to the trapping user code. Submitted by: tmm
2002-02-23 19:00:30 +00:00
#include <machine/tstate.h>
Add libc side of user trap handling. Add support for handling floating point disabled traps mostly in userland for the simple single threaded case. Not yet enabled by default. Implement __sparc_utrap_install as specified by the sparc abi.
2002-01-01 21:58:32 +00:00
#include <machine/utrap.h>
#include "assym.s"
ENTRY(__sparc_utrap_gen)
- change ABI for user trap handler for sun4v (eventually will sync sparc64 no hardware set up to test at the moment) Approved by: scottl (standing in for mentor rwatson)
2006-11-03 23:43:18 +00:00
#ifdef SUN4V
save
ta %xcc, ST_FPEMU_CONTEXT
#endif
Add space for %fsr and %tstate to utrapframe. Save them in the generic user trap entry code. Restore %asi and %ccr from the saved %tstate before returning to the trapping user code. Submitted by: tmm
2002-02-23 19:00:30 +00:00
sub %sp, UF_SIZEOF, %sp
Add libc side of user trap handling. Add support for handling floating point disabled traps mostly in userland for the simple single threaded case. Not yet enabled by default. Implement __sparc_utrap_install as specified by the sparc abi.
2002-01-01 21:58:32 +00:00
stx %o0, [%sp + SPOFF + CCFSZ + UF_TYPE]
stx %o3, [%sp + SPOFF + CCFSZ + UF_TAR]
stx %o4, [%sp + SPOFF + CCFSZ + UF_SFAR]
stx %o5, [%sp + SPOFF + CCFSZ + UF_SFSR]
Add space for %fsr and %tstate to utrapframe. Save them in the generic user trap entry code. Restore %asi and %ccr from the saved %tstate before returning to the trapping user code. Submitted by: tmm
2002-02-23 19:00:30 +00:00
stx %l4, [%sp + SPOFF + CCFSZ + UF_FSR]
stx %l5, [%sp + SPOFF + CCFSZ + UF_STATE]
Add libc side of user trap handling. Add support for handling floating point disabled traps mostly in userland for the simple single threaded case. Not yet enabled by default. Implement __sparc_utrap_install as specified by the sparc abi.
2002-01-01 21:58:32 +00:00
stx %l6, [%sp + SPOFF + CCFSZ + UF_PC]
stx %l7, [%sp + SPOFF + CCFSZ + UF_NPC]
stx %g1, [%sp + SPOFF + CCFSZ + UF_G1]
stx %g2, [%sp + SPOFF + CCFSZ + UF_G2]
stx %g3, [%sp + SPOFF + CCFSZ + UF_G3]
stx %g4, [%sp + SPOFF + CCFSZ + UF_G4]
stx %g5, [%sp + SPOFF + CCFSZ + UF_G5]
stx %g6, [%sp + SPOFF + CCFSZ + UF_G6]
stx %g7, [%sp + SPOFF + CCFSZ + UF_G7]
stx %i0, [%sp + SPOFF + CCFSZ + UF_O0]
stx %i1, [%sp + SPOFF + CCFSZ + UF_O1]
stx %i2, [%sp + SPOFF + CCFSZ + UF_O2]
stx %i3, [%sp + SPOFF + CCFSZ + UF_O3]
stx %i4, [%sp + SPOFF + CCFSZ + UF_O4]
stx %i5, [%sp + SPOFF + CCFSZ + UF_O5]
stx %i6, [%sp + SPOFF + CCFSZ + UF_O6]
stx %i7, [%sp + SPOFF + CCFSZ + UF_O7]
Save/restore the %y register around calls to the C user trap handler; gcc emits the deprecated sparc v8 instructions that use this register when optimizing for UltraSparc machines because they are apparetly faster then their v9 counterpars there.
2002-03-11 02:53:03 +00:00
rd %y, %l6
Add libc side of user trap handling. Add support for handling floating point disabled traps mostly in userland for the simple single threaded case. Not yet enabled by default. Implement __sparc_utrap_install as specified by the sparc abi.
2002-01-01 21:58:32 +00:00
call __sparc_utrap
add %sp, SPOFF + CCFSZ, %o0
Save/restore the %y register around calls to the C user trap handler; gcc emits the deprecated sparc v8 instructions that use this register when optimizing for UltraSparc machines because they are apparetly faster then their v9 counterpars there.
2002-03-11 02:53:03 +00:00
wr %l6, 0, %y
Add libc side of user trap handling. Add support for handling floating point disabled traps mostly in userland for the simple single threaded case. Not yet enabled by default. Implement __sparc_utrap_install as specified by the sparc abi.
2002-01-01 21:58:32 +00:00
ldx [%sp + SPOFF + CCFSZ + UF_G1], %g1
ldx [%sp + SPOFF + CCFSZ + UF_G2], %g2
ldx [%sp + SPOFF + CCFSZ + UF_G3], %g3
ldx [%sp + SPOFF + CCFSZ + UF_G4], %g4
ldx [%sp + SPOFF + CCFSZ + UF_G5], %g5
ldx [%sp + SPOFF + CCFSZ + UF_G6], %g6
ldx [%sp + SPOFF + CCFSZ + UF_G7], %g7
ldx [%sp + SPOFF + CCFSZ + UF_O0], %i0
ldx [%sp + SPOFF + CCFSZ + UF_O1], %i1
ldx [%sp + SPOFF + CCFSZ + UF_O2], %i2
ldx [%sp + SPOFF + CCFSZ + UF_O3], %i3
ldx [%sp + SPOFF + CCFSZ + UF_O4], %i4
ldx [%sp + SPOFF + CCFSZ + UF_O5], %i5
ldx [%sp + SPOFF + CCFSZ + UF_O6], %i6
ldx [%sp + SPOFF + CCFSZ + UF_O7], %i7
Add space for %fsr and %tstate to utrapframe. Save them in the generic user trap entry code. Restore %asi and %ccr from the saved %tstate before returning to the trapping user code. Submitted by: tmm
2002-02-23 19:00:30 +00:00
ldx [%sp + SPOFF + CCFSZ + UF_STATE], %l5
! Restore %asi and %ccr from the passed tstate
srlx %l5, TSTATE_CCR_SHIFT, %l4
and %l4, CCR_MASK, %l4
wr %l4, 0, %ccr
srlx %l5, TSTATE_ASI_SHIFT, %l4
and %l4, ASI_MASK, %l4
wr %l4, 0, %asi
Add libc side of user trap handling. Add support for handling floating point disabled traps mostly in userland for the simple single threaded case. Not yet enabled by default. Implement __sparc_utrap_install as specified by the sparc abi.
2002-01-01 21:58:32 +00:00
ldx [%sp + SPOFF + CCFSZ + UF_PC], %l6
ldx [%sp + SPOFF + CCFSZ + UF_NPC], %l7
jmpl %l6, %g0
return %l7
END(__sparc_utrap_gen)
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