ppc_save_regs.S 2.1 KB

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  1. /* SPDX-License-Identifier: GPL-2.0-or-later */
  2. /*
  3. * Copyright (C) 1996 Paul Mackerras.
  4. *
  5. * NOTE: assert(sizeof(buf) > 23 * sizeof(long))
  6. */
  7. #include <asm/processor.h>
  8. #include <asm/ppc_asm.h>
  9. #include <asm/asm-offsets.h>
  10. #include <asm/ptrace.h>
  11. #include <asm/asm-compat.h>
  12. /*
  13. * Grab the register values as they are now.
  14. * This won't do a particularly good job because we really
  15. * want our caller's caller's registers, and our caller has
  16. * already executed its prologue.
  17. * ToDo: We could reach back into the caller's save area to do
  18. * a better job of representing the caller's state (note that
  19. * that will be different for 32-bit and 64-bit, because of the
  20. * different ABIs, though).
  21. */
  22. _GLOBAL(ppc_save_regs)
  23. PPC_STL r0,0*SZL(r3)
  24. #ifdef CONFIG_PPC32
  25. stmw r2, 2*SZL(r3)
  26. #else
  27. PPC_STL r2,2*SZL(r3)
  28. PPC_STL r3,3*SZL(r3)
  29. PPC_STL r4,4*SZL(r3)
  30. PPC_STL r5,5*SZL(r3)
  31. PPC_STL r6,6*SZL(r3)
  32. PPC_STL r7,7*SZL(r3)
  33. PPC_STL r8,8*SZL(r3)
  34. PPC_STL r9,9*SZL(r3)
  35. PPC_STL r10,10*SZL(r3)
  36. PPC_STL r11,11*SZL(r3)
  37. PPC_STL r12,12*SZL(r3)
  38. PPC_STL r13,13*SZL(r3)
  39. PPC_STL r14,14*SZL(r3)
  40. PPC_STL r15,15*SZL(r3)
  41. PPC_STL r16,16*SZL(r3)
  42. PPC_STL r17,17*SZL(r3)
  43. PPC_STL r18,18*SZL(r3)
  44. PPC_STL r19,19*SZL(r3)
  45. PPC_STL r20,20*SZL(r3)
  46. PPC_STL r21,21*SZL(r3)
  47. PPC_STL r22,22*SZL(r3)
  48. PPC_STL r23,23*SZL(r3)
  49. PPC_STL r24,24*SZL(r3)
  50. PPC_STL r25,25*SZL(r3)
  51. PPC_STL r26,26*SZL(r3)
  52. PPC_STL r27,27*SZL(r3)
  53. PPC_STL r28,28*SZL(r3)
  54. PPC_STL r29,29*SZL(r3)
  55. PPC_STL r30,30*SZL(r3)
  56. PPC_STL r31,31*SZL(r3)
  57. lbz r0,PACAIRQSOFTMASK(r13)
  58. PPC_STL r0,SOFTE-STACK_FRAME_OVERHEAD(r3)
  59. #endif
  60. /* go up one stack frame for SP */
  61. PPC_LL r4,0(r1)
  62. PPC_STL r4,1*SZL(r3)
  63. /* get caller's LR */
  64. PPC_LL r0,LRSAVE(r4)
  65. PPC_STL r0,_LINK-STACK_FRAME_OVERHEAD(r3)
  66. mflr r0
  67. PPC_STL r0,_NIP-STACK_FRAME_OVERHEAD(r3)
  68. mfmsr r0
  69. PPC_STL r0,_MSR-STACK_FRAME_OVERHEAD(r3)
  70. mfctr r0
  71. PPC_STL r0,_CTR-STACK_FRAME_OVERHEAD(r3)
  72. mfxer r0
  73. PPC_STL r0,_XER-STACK_FRAME_OVERHEAD(r3)
  74. mfcr r0
  75. PPC_STL r0,_CCR-STACK_FRAME_OVERHEAD(r3)
  76. li r0,0
  77. PPC_STL r0,_TRAP-STACK_FRAME_OVERHEAD(r3)
  78. PPC_STL r0,ORIG_GPR3-STACK_FRAME_OVERHEAD(r3)
  79. blr