| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| /* |
| * Copyright (C) 1996 Paul Mackerras. |
| * |
| * NOTE: assert(sizeof(buf) > 23 * sizeof(long)) |
| */ |
| #include <asm/processor.h> |
| #include <asm/ppc_asm.h> |
| #include <asm/asm-offsets.h> |
| #include <asm/ptrace.h> |
| #include <asm/asm-compat.h> |
| |
| /* |
| * Grab the register values as they are now. |
| * This won't do a particularly good job because we really |
| * want our caller's caller's registers, and our caller has |
| * already executed its prologue. |
| * ToDo: We could reach back into the caller's save area to do |
| * a better job of representing the caller's state (note that |
| * that will be different for 32-bit and 64-bit, because of the |
| * different ABIs, though). |
| */ |
| _GLOBAL(ppc_save_regs) |
| /* This allows stack frame accessor macros and offsets to be used */ |
| subi r3,r3,STACK_FRAME_OVERHEAD |
| PPC_STL r0,GPR0(r3) |
| #ifdef CONFIG_PPC32 |
| stmw r2,GPR2(r3) |
| #else |
| SAVE_GPRS(2, 31, r3) |
| lbz r0,PACAIRQSOFTMASK(r13) |
| PPC_STL r0,SOFTE(r3) |
| #endif |
| /* store current SP */ |
| PPC_STL r1,GPR1(r3) |
| /* get caller's LR */ |
| PPC_LL r4,0(r1) |
| PPC_LL r0,LRSAVE(r4) |
| PPC_STL r0,_LINK(r3) |
| mflr r0 |
| PPC_STL r0,_NIP(r3) |
| mfmsr r0 |
| PPC_STL r0,_MSR(r3) |
| mfctr r0 |
| PPC_STL r0,_CTR(r3) |
| mfxer r0 |
| PPC_STL r0,_XER(r3) |
| mfcr r0 |
| PPC_STL r0,_CCR(r3) |
| li r0,0 |
| PPC_STL r0,_TRAP(r3) |
| PPC_STL r0,ORIG_GPR3(r3) |
| blr |
