module/lua/setjmp/setjmp_ppc.S

   1 /*      $FreeBSD$  */
   2 /*      from:   NetBSD: setjmp.S,v 1.1 1998/01/27 15:13:12 sakamoto Exp $  */
   3 /*      from:   OpenBSD: setjmp.S,v 1.2 1996/12/28 06:22:18 rahnds Exp  */
   4 /* kernel version of this file, does not have signal goop */
   5 /* int setjmp(jmp_buf env) */
   6
   7 #define _ASM
   8 #include <asm/types.h>
   9
  10 #ifdef __powerpc64__
  11 #if !defined(PPC64_ELF_ABI_v2) && !defined(PPC64_ELF_ABI_v1)
  12 #if defined(_CALL_ELF) && _CALL_ELF == 2
  13 #define PPC64_ELF_ABI_v2
  14 #endif /* _CALL_ELF */
  15 #endif /* PPC64_ELF_ABI_ */
  16 #endif /* __powerpc64__ */
  17
  18 #ifdef __powerpc64__
  19 #define LD_REG  ld
  20 #define ST_REG  std
  21 #define REGWIDTH 8
  22 #else
  23 #define LD_REG  lwz
  24 #define ST_REG  stw
  25 #define REGWIDTH 4
  26 #endif /* __powerpc64__ */
  27
  28 #define JMP_r1  1*REGWIDTH
  29 #define JMP_r2  2*REGWIDTH
  30 #define JMP_r14 3*REGWIDTH
  31 #define JMP_r15 4*REGWIDTH
  32 #define JMP_r16 5*REGWIDTH
  33 #define JMP_r17 6*REGWIDTH
  34 #define JMP_r18 7*REGWIDTH
  35 #define JMP_r19 8*REGWIDTH
  36 #define JMP_r20 9*REGWIDTH
  37 #define JMP_r21 10*REGWIDTH
  38 #define JMP_r22 11*REGWIDTH
  39 #define JMP_r23 12*REGWIDTH
  40 #define JMP_r24 13*REGWIDTH
  41 #define JMP_r25 14*REGWIDTH
  42 #define JMP_r26 15*REGWIDTH
  43 #define JMP_r27 16*REGWIDTH
  44 #define JMP_r28 17*REGWIDTH
  45 #define JMP_r29 18*REGWIDTH
  46 #define JMP_r30 19*REGWIDTH
  47 #define JMP_r31 20*REGWIDTH
  48 #define JMP_lr  21*REGWIDTH
  49 #define JMP_cr  22*REGWIDTH
  50 #define JMP_ctr 23*REGWIDTH
  51 #define JMP_xer 24*REGWIDTH
  52
  53 #ifdef __powerpc64__
  54 #ifdef PPC64_ELF_ABI_v2
  55
  56 #define ENTRY(name) \
  57         .align 2 ; \
  58         .type name,@function; \
  59         .globl name; \
  60 name:
  61
  62 #else /* PPC64_ELF_ABI_v1 */
  63
  64 #define XGLUE(a,b) a##b
  65 #define GLUE(a,b) XGLUE(a,b)
  66 #define ENTRY(name) \
  67         .align 2 ; \
  68         .globl name; \
  69         .globl GLUE(.,name); \
  70         .pushsection ".opd","aw"; \
  71 name: \
  72         .quad GLUE(.,name); \
  73         .quad .TOC.@tocbase; \
  74         .quad 0; \
  75         .popsection; \
  76         .type GLUE(.,name),@function; \
  77 GLUE(.,name):
  78
  79 #endif /* PPC64_ELF_ABI_v2 */
  80
  81 #else /* 32-bit */
  82
  83 #define ENTRY(name) \
  84         .text; \
  85         .p2align 4; \
  86         .globl  name; \
  87         .type   name,@function; \
  88 name:
  89
  90 #endif /* __powerpc64__ */
  91
  92
  93 ENTRY(setjmp)
  94         ST_REG 31, JMP_r31(3)
  95         /* r1, r2, r14-r30 */
  96         ST_REG 1,  JMP_r1 (3)
  97         ST_REG 2,  JMP_r2 (3)
  98         ST_REG 14, JMP_r14(3)
  99         ST_REG 15, JMP_r15(3)
 100         ST_REG 16, JMP_r16(3)
 101         ST_REG 17, JMP_r17(3)
 102         ST_REG 18, JMP_r18(3)
 103         ST_REG 19, JMP_r19(3)
 104         ST_REG 20, JMP_r20(3)
 105         ST_REG 21, JMP_r21(3)
 106         ST_REG 22, JMP_r22(3)
 107         ST_REG 23, JMP_r23(3)
 108         ST_REG 24, JMP_r24(3)
 109         ST_REG 25, JMP_r25(3)
 110         ST_REG 26, JMP_r26(3)
 111         ST_REG 27, JMP_r27(3)
 112         ST_REG 28, JMP_r28(3)
 113         ST_REG 29, JMP_r29(3)
 114         ST_REG 30, JMP_r30(3)
 115         /* cr, lr, ctr, xer */
 116         mfcr 0
 117         ST_REG 0, JMP_cr(3)
 118         mflr 0
 119         ST_REG 0, JMP_lr(3)
 120         mfctr 0
 121         ST_REG 0, JMP_ctr(3)
 122         mfxer 0
 123         ST_REG 0, JMP_xer(3)
 124         /* f14-f31, fpscr */
 125         li 3, 0
 126         blr
 127
 128 ENTRY(longjmp)
 129         LD_REG 31, JMP_r31(3)
 130         /* r1, r2, r14-r30 */
 131         LD_REG 1,  JMP_r1 (3)
 132         LD_REG 2,  JMP_r2 (3)
 133         LD_REG 14, JMP_r14(3)
 134         LD_REG 15, JMP_r15(3)
 135         LD_REG 16, JMP_r16(3)
 136         LD_REG 17, JMP_r17(3)
 137         LD_REG 18, JMP_r18(3)
 138         LD_REG 19, JMP_r19(3)
 139         LD_REG 20, JMP_r20(3)
 140         LD_REG 21, JMP_r21(3)
 141         LD_REG 22, JMP_r22(3)
 142         LD_REG 23, JMP_r23(3)
 143         LD_REG 24, JMP_r24(3)
 144         LD_REG 25, JMP_r25(3)
 145         LD_REG 26, JMP_r26(3)
 146         LD_REG 27, JMP_r27(3)
 147         LD_REG 28, JMP_r28(3)
 148         LD_REG 29, JMP_r29(3)
 149         LD_REG 30, JMP_r30(3)
 150         /* cr, lr, ctr, xer */
 151         LD_REG 0, JMP_cr(3)
 152         mtcr 0
 153         LD_REG 0, JMP_lr(3)
 154         mtlr 0
 155         LD_REG 0, JMP_ctr(3)
 156         mtctr 0
 157         LD_REG 0, JMP_xer(3)
 158         mtxer 0
 159         /* f14-f31, fpscr */
 160         mr 3, 4
 161         blr
 162
 163 #ifdef __ELF__
 164 .section .note.GNU-stack,"",%progbits
 165 #endif