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runtime: cleanup ppc64le/linux library startup code

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Fix the argument passing to runtime.newosproc0, the ABI0 argument
storing must account for the fixed frame size.

Cleanup the _rt0_ppc64le_linux_lib definition, the assembler
should not generate a stack frame.  And convert it to use the
new ABI wrappers.

Change-Id: Ibc0be8b37f6522900781a19980fa018dd89ba7b3
Reviewed-on: https://go-review.googlesource.com/c/go/+/479796
Reviewed-by: Than McIntosh <thanm@google.com>
Run-TryBot: Paul Murphy <murp@ibm.com>
Reviewed-by: David Chase <drchase@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
This commit is contained in:
Paul E. Murphy 2023-03-15 13:09:10 -05:00 committed by Paul Murphy
parent 38531c6290
commit 12e65dbdb1
1 changed files with 10 additions and 93 deletions
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103
src/runtime/rt0_linux_ppc64le.s
View File

@ -4,64 +4,22 @@
#include "go_asm.h"
#include "textflag.h"
#include "asm_ppc64x.h"
#include "cgo/abi_ppc64x.h"
TEXT _rt0_ppc64le_linux(SB),NOSPLIT,$0
XOR R0, R0 // Make sure R0 is zero before _main
BR _main<>(SB)
TEXT _rt0_ppc64le_linux_lib(SB),NOSPLIT,$-8
// Start with standard C stack frame layout and linkage.
MOVD LR, R0
MOVD R0, 16(R1) // Save LR in caller's frame.
MOVW CR, R0 // Save CR in caller's frame
MOVD R0, 8(R1)
MOVDU R1, -320(R1) // Allocate frame.
// Preserve callee-save registers.
MOVD R14, 24(R1)
MOVD R15, 32(R1)
MOVD R16, 40(R1)
MOVD R17, 48(R1)
MOVD R18, 56(R1)
MOVD R19, 64(R1)
MOVD R20, 72(R1)
MOVD R21, 80(R1)
MOVD R22, 88(R1)
MOVD R23, 96(R1)
MOVD R24, 104(R1)
MOVD R25, 112(R1)
MOVD R26, 120(R1)
MOVD R27, 128(R1)
MOVD R28, 136(R1)
MOVD R29, 144(R1)
MOVD g, 152(R1) // R30
MOVD R31, 160(R1)
FMOVD F14, 168(R1)
FMOVD F15, 176(R1)
FMOVD F16, 184(R1)
FMOVD F17, 192(R1)
FMOVD F18, 200(R1)
FMOVD F19, 208(R1)
FMOVD F20, 216(R1)
FMOVD F21, 224(R1)
FMOVD F22, 232(R1)
FMOVD F23, 240(R1)
FMOVD F24, 248(R1)
FMOVD F25, 256(R1)
FMOVD F26, 264(R1)
FMOVD F27, 272(R1)
FMOVD F28, 280(R1)
FMOVD F29, 288(R1)
FMOVD F30, 296(R1)
FMOVD F31, 304(R1)
TEXT _rt0_ppc64le_linux_lib(SB),NOSPLIT|NOFRAME,$0
// This is called with ELFv2 calling conventions. Convert to Go.
// Allocate argument storage for call to newosproc0.
STACK_AND_SAVE_HOST_TO_GO_ABI(16)
MOVD R3, _rt0_ppc64le_linux_lib_argc<>(SB)
MOVD R4, _rt0_ppc64le_linux_lib_argv<>(SB)
// Synchronous initialization.
MOVD $runtime·reginit(SB), R12
MOVD R12, CTR
BL (CTR)
MOVD $runtime·libpreinit(SB), R12
MOVD R12, CTR
BL (CTR)
@ -78,57 +36,16 @@ TEXT _rt0_ppc64le_linux_lib(SB),NOSPLIT,$-8
nocgo:
MOVD $0x800000, R12 // stacksize = 8192KB
MOVD R12, 8(R1)
MOVD R12, 8+FIXED_FRAME(R1)
MOVD $_rt0_ppc64le_linux_lib_go(SB), R12
MOVD R12, 16(R1)
MOVD R12, 16+FIXED_FRAME(R1)
MOVD $runtime·newosproc0(SB),R12
MOVD R12, CTR
BL (CTR)
done:
// Restore saved registers.
MOVD 24(R1), R14
MOVD 32(R1), R15
MOVD 40(R1), R16
MOVD 48(R1), R17
MOVD 56(R1), R18
MOVD 64(R1), R19
MOVD 72(R1), R20
MOVD 80(R1), R21
MOVD 88(R1), R22
MOVD 96(R1), R23
MOVD 104(R1), R24
MOVD 112(R1), R25
MOVD 120(R1), R26
MOVD 128(R1), R27
MOVD 136(R1), R28
MOVD 144(R1), R29
MOVD 152(R1), g // R30
MOVD 160(R1), R31
FMOVD 168(R1), F14
FMOVD 176(R1), F15
FMOVD 184(R1), F16
FMOVD 192(R1), F17
FMOVD 200(R1), F18
FMOVD 208(R1), F19
FMOVD 216(R1), F20
FMOVD 224(R1), F21
FMOVD 232(R1), F22
FMOVD 240(R1), F23
FMOVD 248(R1), F24
FMOVD 256(R1), F25
FMOVD 264(R1), F26
FMOVD 272(R1), F27
FMOVD 280(R1), F28
FMOVD 288(R1), F29
FMOVD 296(R1), F30
FMOVD 304(R1), F31
ADD $320, R1
MOVD 8(R1), R0
MOVFL R0, $0xff
MOVD 16(R1), R0
MOVD R0, LR
// Restore and return to ELFv2 caller.
UNSTACK_AND_RESTORE_GO_TO_HOST_ABI(16)
RET
TEXT _rt0_ppc64le_linux_lib_go(SB),NOSPLIT,$0