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#include "ghcconfig.h"
#include "rts/Constants.h"
/* If the RTS mini interpreter is used, e.g. for unregisterised builds,
* then functions StgRun/StgReturn are implemented in file StgCRun.c */
#if !defined(USE_MINIINTERPRETER)
#if defined(powerpc64le_HOST_ARCH)
# if defined(linux_HOST_OS)
/* 64-bit PowerPC ELF V2 ABI Revision 1.4
*
* Stack frame organization (see Figure 2.18, ELF V2 ABI Revision 1.4, p 31)
*
* +-> Back Chain (points to the prevoius stack frame)
* | Floating point register save area (f14-f31)
* | General register save area (r14-r31)
* | ... unused (optional) save areas (size 0)
* | Local variable space
* | Parameter save area (8 doublewords)
* | ... stack header (TOC, LR, CR)
* +-- Back chain <---- SP (r1)
*
* We save all callee-saves general purpose registers (r14-r31, _savegpr1_14)
* and all callee-saves floating point registers (f14-31, _savefpr14) and
* the return address of the caller (LR), which is saved in the caller's
* stack frame as required by the ABI. We only modify the CR0 and CR1 fields
* of the condition register and those are caller-saves, so we don't save CR.
*
* StgReturn restores all saved registers from their respective locations
* on the stack before returning to the caller.
*
* There is no need to save the TOC register (r2) because we will return
* through StgReturn. All calls to StgReturn will be to the global entry
* point and we compute the TOC from the entry address of StgReturn, which
* is required to be in r12 by the ABI.
*/
# define STACK_FRAME_SIZE (RESERVED_C_STACK_BYTES+288+15) & ~15
.file "StgCRun.c"
.abiversion 2
.section ".toc","aw"
.section ".text"
.align 2
.globl StgRun
.hidden StgRun
.type StgRun,@function
StgRun:
.localentry StgRun,.-StgRun
mflr 0
addi 12,1,-(8*18)
bl _savegpr1_14
bl _savefpr_14
stdu 1, -(STACK_FRAME_SIZE)(1)
mr 27, 4
mtctr 3
mr 12, 3
bctr
.globl StgReturn
.type StgReturn,@function
StgReturn:
addis 2,12,.TOC.-StgReturn@ha
addi 2,2,.TOC.-StgReturn@l
.localentry StgReturn,.-StgReturn
mr 3,14
la 1, STACK_FRAME_SIZE(1)
addi 12,1,-(8*18)
bl _restgpr1_14
b _restfpr_14
.section .note.GNU-stack,"",@progbits
# else // linux_HOST_OS
# error Only Linux support for power64 little endian right now.
# endif
#elif defined(powerpc_HOST_ARCH)
# if defined(aix_HOST_OS)
# define STACK_FRAME_SIZE RESERVED_C_STACK_BYTES+224
.toc
.csect StgRun[DS]
.globl StgRun[DS]
.long .StgRun, TOC[TC0], 0
.csect .text[PR]
.globl .StgRun
.StgRun:
mflr 0
mr 5,1
stw 0,8(1)
stwu 1,-(STACK_FRAME_SIZE)(1)
stw 2,-224(5)
stmw 13,-220(5)
stfd 14,-144(5)
stfd 15,-136(5)
stfd 16,-128(5)
stfd 17,-120(5)
stfd 18,-112(5)
stfd 19,-104(5)
stfd 20,-96(5)
stfd 21,-88(5)
stfd 22,-80(5)
stfd 23,-72(5)
stfd 24,-64(5)
stfd 25,-56(5)
stfd 26,-48(5)
stfd 27,-40(5)
stfd 28,-32(5)
stfd 29,-24(5)
stfd 30,-16(5)
stfd 31,-8(5)
mr 27,4
mtctr 3
bctr
.globl StgReturn
StgReturn:
mr 3,14
la 5,(STACK_FRAME_SIZE)(1)
lwz 2,-224(5)
lmw 13,-220(5)
lfd 14,-144(5)
lfd 15,-136(5)
lfd 16,-128(5)
lfd 17,-120(5)
lfd 18,-112(5)
lfd 19,-104(5)
lfd 20,-96(5)
lfd 21,-88(5)
lfd 22,-80(5)
lfd 23,-72(5)
lfd 24,-64(5)
lfd 25,-56(5)
lfd 26,-48(5)
lfd 27,-40(5)
lfd 28,-32(5)
lfd 29,-24(5)
lfd 30,-16(5)
lfd 31,-8(5)
mr 1,5
lwz 0,8(1)
mtlr 0
blr
# endif // aix_HOST_OS
#elif defined(s390x_HOST_ARCH)
# define STACK_FRAME_SIZE (RESERVED_C_STACK_BYTES+160)
.text
.align 8
.globl StgRun
.type StgRun, @function
StgRun:
.cfi_startproc
/* save callee-saved registers */
stmg %r6,%r14,16(%r15)
std %f8, 88(%r15)
std %f9, 96(%r15)
std %f10, 104(%r15)
std %f11, 112(%r15)
std %f12, 120(%r15)
std %f13, 128(%r15)
std %f14, 136(%r15)
std %f15, 144(%r15)
.cfi_offset 6, -144
.cfi_offset 7, -136
.cfi_offset 8, -128
.cfi_offset 9, -120
.cfi_offset 10, -112
.cfi_offset 11, -104
.cfi_offset 12, -96
.cfi_offset 13, -88
.cfi_offset 14, -80
.cfi_offset 15, -72
.cfi_offset 24, -64
.cfi_offset 28, -56
.cfi_offset 25, -48
.cfi_offset 29, -40
.cfi_offset 26, -32
.cfi_offset 30, -24
.cfi_offset 27, -16
.cfi_offset 31, -8
/* allocate stack frame */
aghi %r15,-STACK_FRAME_SIZE
.cfi_def_cfa_offset -(STACK_FRAME_SIZE+160)
/* set STGs BaseReg from S390Xs r3 */
lgr %r7,%r3
/* jump to STG function */
br %r2
.cfi_endproc
.size StgRun, .-StgRun
.text
.align 8
.globl StgReturn
.type StgReturn, @function
StgReturn:
.cfi_startproc
/* set return value from STGs R1 (S390Xs r11) */
lgr %r2,%r11
/* deallocate stack frame */
aghi %r15,STACK_FRAME_SIZE
.cfi_def_cfa_offset (STACK_FRAME_SIZE+160)
/* restore callee-saved registers */
lmg %r6,%r14, 16(%r15)
ld %f8, 88(%r15)
ld %f9, 96(%r15)
ld %f10, 104(%r15)
ld %f11, 112(%r15)
ld %f12, 120(%r15)
ld %f13, 128(%r15)
ld %f14, 136(%r15)
ld %f15, 144(%r15)
.cfi_restore 6
.cfi_restore 7
.cfi_restore 8
.cfi_restore 9
.cfi_restore 10
.cfi_restore 11
.cfi_restore 12
.cfi_restore 13
.cfi_restore 14
.cfi_restore 24
.cfi_restore 28
.cfi_restore 25
.cfi_restore 29
.cfi_restore 26
.cfi_restore 30
.cfi_restore 27
.cfi_restore 31
.cfi_def_cfa 15, 160
/* jump back to caller of StgRun() */
br %r14
.cfi_endproc
.size StgReturn, .-StgReturn
.section .note.GNU-stack,"",@progbits
#endif
#endif /* !USE_MINIINTERPRETER */
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