__longjmp.S 3.0 KB

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  1. /* longjmp for ARM.
  2. Copyright (C) 1997, 1998 Free Software Foundation, Inc.
  3. This file is part of the GNU C Library.
  4. The GNU C Library is free software; you can redistribute it and/or
  5. modify it under the terms of the GNU Lesser General Public
  6. License as published by the Free Software Foundation; either
  7. version 2.1 of the License, or (at your option) any later version.
  8. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library; if not, see
  14. <http://www.gnu.org/licenses/>. */
  15. #include <features.h>
  16. #include <bits/arm_asm.h>
  17. #include <bits/arm_bx.h>
  18. .global __longjmp
  19. .type __longjmp,%function
  20. .align 2
  21. #if defined(THUMB1_ONLY)
  22. .thumb_func
  23. __longjmp:
  24. mov r2, r0
  25. movs r0, r1
  26. /* can't let setjmp() return zero! */
  27. bne 1f
  28. mov r0, #1
  29. 1:
  30. mov r1, r2
  31. /* Restore registers, shuffling them through low regs. */
  32. add r2, #(4 * 4)
  33. ldmia r2!, {r4, r5, r6, r7}
  34. mov r8, r4
  35. mov r9, r5
  36. mov sl, r6
  37. mov fp, r7
  38. ldmia r2!, {r4, r5}
  39. mov sp, r4
  40. mov lr, r5
  41. ldmia r1!, {r4, r5, r6, r7}
  42. bx lr
  43. #else
  44. __longjmp:
  45. mov ip, r0 /* save jmp_buf pointer */
  46. movs r0, r1 /* get the return value in place */
  47. IT(t, eq)
  48. moveq r0, #1 /* can't let setjmp() return zero! */
  49. #if defined(__thumb2__)
  50. /* Thumb-2 does not allow loading sp with ldm. */
  51. ldmia ip!, {v1-v6, sl, fp}
  52. ldr sp, [ip], #4
  53. ldr lr, [ip], #4
  54. #else
  55. ldmia ip!, {v1-v6, sl, fp, sp, lr}
  56. #endif
  57. #if defined __UCLIBC_HAS_FLOATS__ && ! defined __UCLIBC_HAS_SOFT_FLOAT__
  58. #ifdef __VFP_FP__
  59. # if __ARM_ARCH >= 8
  60. /* Restore the VFP registers. */
  61. fldmiax ip!, {d8-d15}
  62. /* Restore the floating-point status register. */
  63. ldr r1, [ip], #4
  64. fmxr fpscr, r1
  65. # else
  66. /* Restore the VFP registers. */
  67. /* Following instruction is fldmiax ip!, {d8-d15}. */
  68. ldc p11, cr8, [r12], #68
  69. /* Restore the floating-point status register. */
  70. ldr r1, [ip], #4
  71. /* Following instruction is fmxr fpscr, r1. */
  72. mcr p10, 7, r1, cr1, cr0, 0
  73. # endif
  74. # elif defined __MAVERICK__
  75. cfldrd mvd4, [ip], #8 ; nop
  76. cfldrd mvd5, [ip], #8 ; nop
  77. cfldrd mvd6, [ip], #8 ; nop
  78. cfldrd mvd7, [ip], #8 ; nop
  79. cfldrd mvd8, [ip], #8 ; nop
  80. cfldrd mvd9, [ip], #8 ; nop
  81. cfldrd mvd10, [ip], #8 ; nop
  82. cfldrd mvd11, [ip], #8 ; nop
  83. cfldrd mvd12, [ip], #8 ; nop
  84. cfldrd mvd13, [ip], #8 ; nop
  85. cfldrd mvd14, [ip], #8 ; nop
  86. cfldrd mvd15, [ip], #8
  87. # else
  88. lfmfd f4, 4, [ip] ! /* load the floating point regs */
  89. # endif
  90. #endif
  91. #ifdef __IWMMXT__
  92. /* Restore the call-preserved iWMMXt registers. */
  93. /* Following instructions are wldrd wr10, [ip], #8 (etc.) */
  94. ldcl p1, cr10, [r12], #8
  95. ldcl p1, cr11, [r12], #8
  96. ldcl p1, cr12, [r12], #8
  97. ldcl p1, cr13, [r12], #8
  98. ldcl p1, cr14, [r12], #8
  99. ldcl p1, cr15, [r12], #8
  100. #endif
  101. BX(lr)
  102. #endif
  103. .size __longjmp,.-__longjmp
  104. libc_hidden_def(__longjmp)