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kicad/common/system/jump_arm_aapcs_elf_gas.S

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Boost::Context support for ARM platform.
12 years ago
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  1. /*
  2. Copyright Oliver Kowalke 2009.
  3. Distributed under the Boost Software License, Version 1.0.
  4. (See accompanying file LICENSE_1_0.txt or copy at
  5. http://www.boost.org/LICENSE_1_0.txt)
  6. */
  8. /*******************************************************************
  9. * *
  10. * ------------------------------------------------------------- *
  11. * | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | *
  12. * ------------------------------------------------------------- *
  13. * | 0x0 | 0x4 | 0x8 | 0xc | 0x10| 0x14| 0x18| 0x1c| 0x20| 0x24| *
  14. * ------------------------------------------------------------- *
  15. * | v1 | v2 | v3 | v4 | v5 | v6 | v7 | v8 | sp | lr | *
  16. * ------------------------------------------------------------- *
  17. * ------------------------------------------------------------- *
  18. * | 10 | | *
  19. * ------------------------------------------------------------- *
  20. * | 0x28| | *
  21. * ------------------------------------------------------------- *
  22. * | pc | | *
  23. * ------------------------------------------------------------- *
  24. * ------------------------------------------------------------- *
  25. * | 11 | 12 | | *
  26. * ------------------------------------------------------------- *
  27. * | 0x2c| 0x30| | *
  28. * ------------------------------------------------------------- *
  29. * | sp | size| | *
  30. * ------------------------------------------------------------- *
  31. * ------------------------------------------------------------- *
  32. * | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | *
  33. * ------------------------------------------------------------- *
  34. * | 0x34| 0x38|0x3c| 0x40| 0x44| 0x48| 0x4c| 0x50| 0x54| 0x58 | *
  35. * ------------------------------------------------------------- *
  36. * | s16 | s17 | s18 | s19 | s20 | s21 | s22 | s23 | s24 | s25 | *
  37. * ------------------------------------------------------------- *
  38. * ------------------------------------------------------------- *
  39. * | 23 | 24 | 25 | 26 | 27 | 28 | | *
  40. * ------------------------------------------------------------- *
  41. * | 0x5c| 0x60| 0x64| 0x68| 0x6c| 0x70| | *
  42. * ------------------------------------------------------------- *
  43. * | s26 | s27 | s28 | s29 | s30 | s31 | | *
  44. * ------------------------------------------------------------- *
  45. * *
  46. * *****************************************************************/
  48. .text
  49. .globl jump_fcontext
  50. .align 2
  51. .type jump_fcontext,%function
  52. jump_fcontext:
  53. stmia a1, {v1-v8,sp-lr} @ save V1-V8,SP-LR
  54. str lr, [a1,#40] @ save LR as PC
  56. #if (defined(__VFP_FP__) && !defined(__SOFTFP__))
  57. cmp a4, #0 @ test if fpu env should be preserved
  58. beq 1f
  60. mov a4, a1
  61. add a4, #52
  62. vstmia a4, {d8-d15} @ save S16-S31
  64. mov a4, a2
  65. add a4, #52
  66. vldmia a4, {d8-d15} @ restore S16-S31
  67. 1:
  68. #endif
  70. mov a1, a3 @ use third arg as return value after jump
  71. @ and as first arg in context function
  72. ldmia a2, {v1-v8,sp-pc} @ restore v1-V8,SP-PC
  73. .size jump_fcontext,.-jump_fcontext
  75. /* Mark that we don't need executable stack. */
  76. .section .note.GNU-stack,"",%progbits