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Diffstat (limited to 'arch/ia64/kernel/unwind_decoder.c')
-rw-r--r--arch/ia64/kernel/unwind_decoder.c460
1 files changed, 0 insertions, 460 deletions
diff --git a/arch/ia64/kernel/unwind_decoder.c b/arch/ia64/kernel/unwind_decoder.c
deleted file mode 100644
index 83f54f7929b5..000000000000
--- a/arch/ia64/kernel/unwind_decoder.c
+++ /dev/null
@@ -1,460 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2000 Hewlett-Packard Co
- * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
- *
- * Generic IA-64 unwind info decoder.
- *
- * This file is used both by the Linux kernel and objdump. Please keep
- * the two copies of this file in sync.
- *
- * You need to customize the decoder by defining the following
- * macros/constants before including this file:
- *
- * Types:
- * unw_word Unsigned integer type with at least 64 bits
- *
- * Register names:
- * UNW_REG_BSP
- * UNW_REG_BSPSTORE
- * UNW_REG_FPSR
- * UNW_REG_LC
- * UNW_REG_PFS
- * UNW_REG_PR
- * UNW_REG_RNAT
- * UNW_REG_PSP
- * UNW_REG_RP
- * UNW_REG_UNAT
- *
- * Decoder action macros:
- * UNW_DEC_BAD_CODE(code)
- * UNW_DEC_ABI(fmt,abi,context,arg)
- * UNW_DEC_BR_GR(fmt,brmask,gr,arg)
- * UNW_DEC_BR_MEM(fmt,brmask,arg)
- * UNW_DEC_COPY_STATE(fmt,label,arg)
- * UNW_DEC_EPILOGUE(fmt,t,ecount,arg)
- * UNW_DEC_FRGR_MEM(fmt,grmask,frmask,arg)
- * UNW_DEC_FR_MEM(fmt,frmask,arg)
- * UNW_DEC_GR_GR(fmt,grmask,gr,arg)
- * UNW_DEC_GR_MEM(fmt,grmask,arg)
- * UNW_DEC_LABEL_STATE(fmt,label,arg)
- * UNW_DEC_MEM_STACK_F(fmt,t,size,arg)
- * UNW_DEC_MEM_STACK_V(fmt,t,arg)
- * UNW_DEC_PRIUNAT_GR(fmt,r,arg)
- * UNW_DEC_PRIUNAT_WHEN_GR(fmt,t,arg)
- * UNW_DEC_PRIUNAT_WHEN_MEM(fmt,t,arg)
- * UNW_DEC_PRIUNAT_WHEN_PSPREL(fmt,pspoff,arg)
- * UNW_DEC_PRIUNAT_WHEN_SPREL(fmt,spoff,arg)
- * UNW_DEC_PROLOGUE(fmt,body,rlen,arg)
- * UNW_DEC_PROLOGUE_GR(fmt,rlen,mask,grsave,arg)
- * UNW_DEC_REG_PSPREL(fmt,reg,pspoff,arg)
- * UNW_DEC_REG_REG(fmt,src,dst,arg)
- * UNW_DEC_REG_SPREL(fmt,reg,spoff,arg)
- * UNW_DEC_REG_WHEN(fmt,reg,t,arg)
- * UNW_DEC_RESTORE(fmt,t,abreg,arg)
- * UNW_DEC_RESTORE_P(fmt,qp,t,abreg,arg)
- * UNW_DEC_SPILL_BASE(fmt,pspoff,arg)
- * UNW_DEC_SPILL_MASK(fmt,imaskp,arg)
- * UNW_DEC_SPILL_PSPREL(fmt,t,abreg,pspoff,arg)
- * UNW_DEC_SPILL_PSPREL_P(fmt,qp,t,abreg,pspoff,arg)
- * UNW_DEC_SPILL_REG(fmt,t,abreg,x,ytreg,arg)
- * UNW_DEC_SPILL_REG_P(fmt,qp,t,abreg,x,ytreg,arg)
- * UNW_DEC_SPILL_SPREL(fmt,t,abreg,spoff,arg)
- * UNW_DEC_SPILL_SPREL_P(fmt,qp,t,abreg,pspoff,arg)
- */
-
-static unw_word
-unw_decode_uleb128 (unsigned char **dpp)
-{
- unsigned shift = 0;
- unw_word byte, result = 0;
- unsigned char *bp = *dpp;
-
- while (1)
- {
- byte = *bp++;
- result |= (byte & 0x7f) << shift;
- if ((byte & 0x80) == 0)
- break;
- shift += 7;
- }
- *dpp = bp;
- return result;
-}
-
-static unsigned char *
-unw_decode_x1 (unsigned char *dp, unsigned char code, void *arg)
-{
- unsigned char byte1, abreg;
- unw_word t, off;
-
- byte1 = *dp++;
- t = unw_decode_uleb128 (&dp);
- off = unw_decode_uleb128 (&dp);
- abreg = (byte1 & 0x7f);
- if (byte1 & 0x80)
- UNW_DEC_SPILL_SPREL(X1, t, abreg, off, arg);
- else
- UNW_DEC_SPILL_PSPREL(X1, t, abreg, off, arg);
- return dp;
-}
-
-static unsigned char *
-unw_decode_x2 (unsigned char *dp, unsigned char code, void *arg)
-{
- unsigned char byte1, byte2, abreg, x, ytreg;
- unw_word t;
-
- byte1 = *dp++; byte2 = *dp++;
- t = unw_decode_uleb128 (&dp);
- abreg = (byte1 & 0x7f);
- ytreg = byte2;
- x = (byte1 >> 7) & 1;
- if ((byte1 & 0x80) == 0 && ytreg == 0)
- UNW_DEC_RESTORE(X2, t, abreg, arg);
- else
- UNW_DEC_SPILL_REG(X2, t, abreg, x, ytreg, arg);
- return dp;
-}
-
-static unsigned char *
-unw_decode_x3 (unsigned char *dp, unsigned char code, void *arg)
-{
- unsigned char byte1, byte2, abreg, qp;
- unw_word t, off;
-
- byte1 = *dp++; byte2 = *dp++;
- t = unw_decode_uleb128 (&dp);
- off = unw_decode_uleb128 (&dp);
-
- qp = (byte1 & 0x3f);
- abreg = (byte2 & 0x7f);
-
- if (byte1 & 0x80)
- UNW_DEC_SPILL_SPREL_P(X3, qp, t, abreg, off, arg);
- else
- UNW_DEC_SPILL_PSPREL_P(X3, qp, t, abreg, off, arg);
- return dp;
-}
-
-static unsigned char *
-unw_decode_x4 (unsigned char *dp, unsigned char code, void *arg)
-{
- unsigned char byte1, byte2, byte3, qp, abreg, x, ytreg;
- unw_word t;
-
- byte1 = *dp++; byte2 = *dp++; byte3 = *dp++;
- t = unw_decode_uleb128 (&dp);
-
- qp = (byte1 & 0x3f);
- abreg = (byte2 & 0x7f);
- x = (byte2 >> 7) & 1;
- ytreg = byte3;
-
- if ((byte2 & 0x80) == 0 && byte3 == 0)
- UNW_DEC_RESTORE_P(X4, qp, t, abreg, arg);
- else
- UNW_DEC_SPILL_REG_P(X4, qp, t, abreg, x, ytreg, arg);
- return dp;
-}
-
-static unsigned char *
-unw_decode_r1 (unsigned char *dp, unsigned char code, void *arg)
-{
- int body = (code & 0x20) != 0;
- unw_word rlen;
-
- rlen = (code & 0x1f);
- UNW_DEC_PROLOGUE(R1, body, rlen, arg);
- return dp;
-}
-
-static unsigned char *
-unw_decode_r2 (unsigned char *dp, unsigned char code, void *arg)
-{
- unsigned char byte1, mask, grsave;
- unw_word rlen;
-
- byte1 = *dp++;
-
- mask = ((code & 0x7) << 1) | ((byte1 >> 7) & 1);
- grsave = (byte1 & 0x7f);
- rlen = unw_decode_uleb128 (&dp);
- UNW_DEC_PROLOGUE_GR(R2, rlen, mask, grsave, arg);
- return dp;
-}
-
-static unsigned char *
-unw_decode_r3 (unsigned char *dp, unsigned char code, void *arg)
-{
- unw_word rlen;
-
- rlen = unw_decode_uleb128 (&dp);
- UNW_DEC_PROLOGUE(R3, ((code & 0x3) == 1), rlen, arg);
- return dp;
-}
-
-static unsigned char *
-unw_decode_p1 (unsigned char *dp, unsigned char code, void *arg)
-{
- unsigned char brmask = (code & 0x1f);
-
- UNW_DEC_BR_MEM(P1, brmask, arg);
- return dp;
-}
-
-static unsigned char *
-unw_decode_p2_p5 (unsigned char *dp, unsigned char code, void *arg)
-{
- if ((code & 0x10) == 0)
- {
- unsigned char byte1 = *dp++;
-
- UNW_DEC_BR_GR(P2, ((code & 0xf) << 1) | ((byte1 >> 7) & 1),
- (byte1 & 0x7f), arg);
- }
- else if ((code & 0x08) == 0)
- {
- unsigned char byte1 = *dp++, r, dst;
-
- r = ((code & 0x7) << 1) | ((byte1 >> 7) & 1);
- dst = (byte1 & 0x7f);
- switch (r)
- {
- case 0: UNW_DEC_REG_GR(P3, UNW_REG_PSP, dst, arg); break;
- case 1: UNW_DEC_REG_GR(P3, UNW_REG_RP, dst, arg); break;
- case 2: UNW_DEC_REG_GR(P3, UNW_REG_PFS, dst, arg); break;
- case 3: UNW_DEC_REG_GR(P3, UNW_REG_PR, dst, arg); break;
- case 4: UNW_DEC_REG_GR(P3, UNW_REG_UNAT, dst, arg); break;
- case 5: UNW_DEC_REG_GR(P3, UNW_REG_LC, dst, arg); break;
- case 6: UNW_DEC_RP_BR(P3, dst, arg); break;
- case 7: UNW_DEC_REG_GR(P3, UNW_REG_RNAT, dst, arg); break;
- case 8: UNW_DEC_REG_GR(P3, UNW_REG_BSP, dst, arg); break;
- case 9: UNW_DEC_REG_GR(P3, UNW_REG_BSPSTORE, dst, arg); break;
- case 10: UNW_DEC_REG_GR(P3, UNW_REG_FPSR, dst, arg); break;
- case 11: UNW_DEC_PRIUNAT_GR(P3, dst, arg); break;
- default: UNW_DEC_BAD_CODE(r); break;
- }
- }
- else if ((code & 0x7) == 0)
- UNW_DEC_SPILL_MASK(P4, dp, arg);
- else if ((code & 0x7) == 1)
- {
- unw_word grmask, frmask, byte1, byte2, byte3;
-
- byte1 = *dp++; byte2 = *dp++; byte3 = *dp++;
- grmask = ((byte1 >> 4) & 0xf);
- frmask = ((byte1 & 0xf) << 16) | (byte2 << 8) | byte3;
- UNW_DEC_FRGR_MEM(P5, grmask, frmask, arg);
- }
- else
- UNW_DEC_BAD_CODE(code);
- return dp;
-}
-
-static unsigned char *
-unw_decode_p6 (unsigned char *dp, unsigned char code, void *arg)
-{
- int gregs = (code & 0x10) != 0;
- unsigned char mask = (code & 0x0f);
-
- if (gregs)
- UNW_DEC_GR_MEM(P6, mask, arg);
- else
- UNW_DEC_FR_MEM(P6, mask, arg);
- return dp;
-}
-
-static unsigned char *
-unw_decode_p7_p10 (unsigned char *dp, unsigned char code, void *arg)
-{
- unsigned char r, byte1, byte2;
- unw_word t, size;
-
- if ((code & 0x10) == 0)
- {
- r = (code & 0xf);
- t = unw_decode_uleb128 (&dp);
- switch (r)
- {
- case 0:
- size = unw_decode_uleb128 (&dp);
- UNW_DEC_MEM_STACK_F(P7, t, size, arg);
- break;
-
- case 1: UNW_DEC_MEM_STACK_V(P7, t, arg); break;
- case 2: UNW_DEC_SPILL_BASE(P7, t, arg); break;
- case 3: UNW_DEC_REG_SPREL(P7, UNW_REG_PSP, t, arg); break;
- case 4: UNW_DEC_REG_WHEN(P7, UNW_REG_RP, t, arg); break;
- case 5: UNW_DEC_REG_PSPREL(P7, UNW_REG_RP, t, arg); break;
- case 6: UNW_DEC_REG_WHEN(P7, UNW_REG_PFS, t, arg); break;
- case 7: UNW_DEC_REG_PSPREL(P7, UNW_REG_PFS, t, arg); break;
- case 8: UNW_DEC_REG_WHEN(P7, UNW_REG_PR, t, arg); break;
- case 9: UNW_DEC_REG_PSPREL(P7, UNW_REG_PR, t, arg); break;
- case 10: UNW_DEC_REG_WHEN(P7, UNW_REG_LC, t, arg); break;
- case 11: UNW_DEC_REG_PSPREL(P7, UNW_REG_LC, t, arg); break;
- case 12: UNW_DEC_REG_WHEN(P7, UNW_REG_UNAT, t, arg); break;
- case 13: UNW_DEC_REG_PSPREL(P7, UNW_REG_UNAT, t, arg); break;
- case 14: UNW_DEC_REG_WHEN(P7, UNW_REG_FPSR, t, arg); break;
- case 15: UNW_DEC_REG_PSPREL(P7, UNW_REG_FPSR, t, arg); break;
- default: UNW_DEC_BAD_CODE(r); break;
- }
- }
- else
- {
- switch (code & 0xf)
- {
- case 0x0: /* p8 */
- {
- r = *dp++;
- t = unw_decode_uleb128 (&dp);
- switch (r)
- {
- case 1: UNW_DEC_REG_SPREL(P8, UNW_REG_RP, t, arg); break;
- case 2: UNW_DEC_REG_SPREL(P8, UNW_REG_PFS, t, arg); break;
- case 3: UNW_DEC_REG_SPREL(P8, UNW_REG_PR, t, arg); break;
- case 4: UNW_DEC_REG_SPREL(P8, UNW_REG_LC, t, arg); break;
- case 5: UNW_DEC_REG_SPREL(P8, UNW_REG_UNAT, t, arg); break;
- case 6: UNW_DEC_REG_SPREL(P8, UNW_REG_FPSR, t, arg); break;
- case 7: UNW_DEC_REG_WHEN(P8, UNW_REG_BSP, t, arg); break;
- case 8: UNW_DEC_REG_PSPREL(P8, UNW_REG_BSP, t, arg); break;
- case 9: UNW_DEC_REG_SPREL(P8, UNW_REG_BSP, t, arg); break;
- case 10: UNW_DEC_REG_WHEN(P8, UNW_REG_BSPSTORE, t, arg); break;
- case 11: UNW_DEC_REG_PSPREL(P8, UNW_REG_BSPSTORE, t, arg); break;
- case 12: UNW_DEC_REG_SPREL(P8, UNW_REG_BSPSTORE, t, arg); break;
- case 13: UNW_DEC_REG_WHEN(P8, UNW_REG_RNAT, t, arg); break;
- case 14: UNW_DEC_REG_PSPREL(P8, UNW_REG_RNAT, t, arg); break;
- case 15: UNW_DEC_REG_SPREL(P8, UNW_REG_RNAT, t, arg); break;
- case 16: UNW_DEC_PRIUNAT_WHEN_GR(P8, t, arg); break;
- case 17: UNW_DEC_PRIUNAT_PSPREL(P8, t, arg); break;
- case 18: UNW_DEC_PRIUNAT_SPREL(P8, t, arg); break;
- case 19: UNW_DEC_PRIUNAT_WHEN_MEM(P8, t, arg); break;
- default: UNW_DEC_BAD_CODE(r); break;
- }
- }
- break;
-
- case 0x1:
- byte1 = *dp++; byte2 = *dp++;
- UNW_DEC_GR_GR(P9, (byte1 & 0xf), (byte2 & 0x7f), arg);
- break;
-
- case 0xf: /* p10 */
- byte1 = *dp++; byte2 = *dp++;
- UNW_DEC_ABI(P10, byte1, byte2, arg);
- break;
-
- case 0x9:
- return unw_decode_x1 (dp, code, arg);
-
- case 0xa:
- return unw_decode_x2 (dp, code, arg);
-
- case 0xb:
- return unw_decode_x3 (dp, code, arg);
-
- case 0xc:
- return unw_decode_x4 (dp, code, arg);
-
- default:
- UNW_DEC_BAD_CODE(code);
- break;
- }
- }
- return dp;
-}
-
-static unsigned char *
-unw_decode_b1 (unsigned char *dp, unsigned char code, void *arg)
-{
- unw_word label = (code & 0x1f);
-
- if ((code & 0x20) != 0)
- UNW_DEC_COPY_STATE(B1, label, arg);
- else
- UNW_DEC_LABEL_STATE(B1, label, arg);
- return dp;
-}
-
-static unsigned char *
-unw_decode_b2 (unsigned char *dp, unsigned char code, void *arg)
-{
- unw_word t;
-
- t = unw_decode_uleb128 (&dp);
- UNW_DEC_EPILOGUE(B2, t, (code & 0x1f), arg);
- return dp;
-}
-
-static unsigned char *
-unw_decode_b3_x4 (unsigned char *dp, unsigned char code, void *arg)
-{
- unw_word t, ecount, label;
-
- if ((code & 0x10) == 0)
- {
- t = unw_decode_uleb128 (&dp);
- ecount = unw_decode_uleb128 (&dp);
- UNW_DEC_EPILOGUE(B3, t, ecount, arg);
- }
- else if ((code & 0x07) == 0)
- {
- label = unw_decode_uleb128 (&dp);
- if ((code & 0x08) != 0)
- UNW_DEC_COPY_STATE(B4, label, arg);
- else
- UNW_DEC_LABEL_STATE(B4, label, arg);
- }
- else
- switch (code & 0x7)
- {
- case 1: return unw_decode_x1 (dp, code, arg);
- case 2: return unw_decode_x2 (dp, code, arg);
- case 3: return unw_decode_x3 (dp, code, arg);
- case 4: return unw_decode_x4 (dp, code, arg);
- default: UNW_DEC_BAD_CODE(code); break;
- }
- return dp;
-}
-
-typedef unsigned char *(*unw_decoder) (unsigned char *, unsigned char, void *);
-
-static unw_decoder unw_decode_table[2][8] =
-{
- /* prologue table: */
- {
- unw_decode_r1, /* 0 */
- unw_decode_r1,
- unw_decode_r2,
- unw_decode_r3,
- unw_decode_p1, /* 4 */
- unw_decode_p2_p5,
- unw_decode_p6,
- unw_decode_p7_p10
- },
- {
- unw_decode_r1, /* 0 */
- unw_decode_r1,
- unw_decode_r2,
- unw_decode_r3,
- unw_decode_b1, /* 4 */
- unw_decode_b1,
- unw_decode_b2,
- unw_decode_b3_x4
- }
-};
-
-/*
- * Decode one descriptor and return address of next descriptor.
- */
-static inline unsigned char *
-unw_decode (unsigned char *dp, int inside_body, void *arg)
-{
- unw_decoder decoder;
- unsigned char code;
-
- code = *dp++;
- decoder = unw_decode_table[inside_body][code >> 5];
- dp = (*decoder) (dp, code, arg);
- return dp;
-}
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