| 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
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| 2 | /* |
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| 3 | * Copyright (C) 1996 Paul Mackerras. |
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| 4 | * |
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| 5 | * NOTE: assert(sizeof(buf) > 23 * sizeof(long)) |
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| 6 | */ |
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| 7 | #include <asm/processor.h> |
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| 8 | #include <asm/ppc_asm.h> |
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| 9 | #include <asm/asm-offsets.h> |
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| 10 | #include <asm/ptrace.h> |
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| 11 | #include <asm/asm-compat.h> |
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| 12 | |
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| 13 | /* |
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| 14 | * Grab the register values as they are now. |
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| 15 | * This won't do a particularly good job because we really |
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| 16 | * want our caller's caller's registers, and our caller has |
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| 17 | * already executed its prologue. |
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| 18 | * ToDo: We could reach back into the caller's save area to do |
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| 19 | * a better job of representing the caller's state (note that |
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| 20 | * that will be different for 32-bit and 64-bit, because of the |
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| 21 | * different ABIs, though). |
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| 22 | */ |
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| 23 | _GLOBAL(ppc_save_regs) |
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| 24 | /* This allows stack frame accessor macros and offsets to be used */ |
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| 25 | subi r3,r3,STACK_INT_FRAME_REGS |
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| 26 | PPC_STL r0,GPR0(r3) |
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| 27 | #ifdef CONFIG_PPC32 |
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| 28 | stmw r2,GPR2(r3) |
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| 29 | #else |
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| 30 | SAVE_GPRS(2, 31, r3) |
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| 31 | lbz r0,PACAIRQSOFTMASK(r13) |
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| 32 | PPC_STL r0,SOFTE(r3) |
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| 33 | #endif |
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| 34 | /* store current SP */ |
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| 35 | PPC_STL r1,GPR1(r3) |
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| 36 | /* get caller's LR */ |
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| 37 | PPC_LL r4,0(r1) |
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| 38 | PPC_LL r0,LRSAVE(r4) |
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| 39 | PPC_STL r0,_LINK(r3) |
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| 40 | mflr r0 |
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| 41 | PPC_STL r0,_NIP(r3) |
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| 42 | mfmsr r0 |
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| 43 | PPC_STL r0,_MSR(r3) |
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| 44 | mfctr r0 |
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| 45 | PPC_STL r0,_CTR(r3) |
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| 46 | mfxer r0 |
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| 47 | PPC_STL r0,_XER(r3) |
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| 48 | mfcr r0 |
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| 49 | PPC_STL r0,_CCR(r3) |
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| 50 | li r0,0 |
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| 51 | PPC_STL r0,_TRAP(r3) |
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| 52 | PPC_STL r0,ORIG_GPR3(r3) |
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| 53 | blr |
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| 54 | |
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