| /* unwind-ia64.c -- utility routines to dump IA-64 unwind info for readelf. |
| Copyright (C) 2000-2016 Free Software Foundation, Inc. |
| |
| Contributed by David Mosberger-Tang <davidm@hpl.hp.com> |
| |
| This file is part of GNU Binutils. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3, or (at your option) |
| any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, 51 Franklin Street - Fifth Floor, Boston, |
| MA 02110-1301, USA. */ |
| |
| #include "config.h" |
| #include "unwind-ia64.h" |
| #include <stdio.h> |
| #include <string.h> |
| |
| #if __GNUC__ >= 2 |
| /* Define BFD64 here, even if our default architecture is 32 bit ELF |
| as this will allow us to read in and parse 64bit and 32bit ELF files. |
| Only do this if we believe that the compiler can support a 64 bit |
| data type. For now we only rely on GCC being able to do this. */ |
| #define BFD64 |
| #endif |
| #include "bfd.h" |
| |
| static bfd_vma unw_rlen = 0; |
| |
| static void unw_print_brmask (char *, unsigned int); |
| static void unw_print_grmask (char *, unsigned int); |
| static void unw_print_frmask (char *, unsigned int); |
| static void unw_print_abreg (char *, unsigned int); |
| static void unw_print_xyreg (char *, unsigned int, unsigned int); |
| |
| static void |
| unw_print_brmask (char *cp, unsigned int mask) |
| { |
| int sep = 0; |
| int i; |
| |
| for (i = 0; mask && (i < 5); ++i) |
| { |
| if (mask & 1) |
| { |
| if (sep) |
| *cp++ = ','; |
| *cp++ = 'b'; |
| *cp++ = i + 1 + '0'; |
| sep = 1; |
| } |
| mask >>= 1; |
| } |
| *cp = '\0'; |
| } |
| |
| static void |
| unw_print_grmask (char *cp, unsigned int mask) |
| { |
| int sep = 0; |
| int i; |
| |
| for (i = 0; i < 4; ++i) |
| { |
| if (mask & 1) |
| { |
| if (sep) |
| *cp++ = ','; |
| *cp++ = 'r'; |
| *cp++ = i + 4 + '0'; |
| sep = 1; |
| } |
| mask >>= 1; |
| } |
| *cp = '\0'; |
| } |
| |
| static void |
| unw_print_frmask (char *cp, unsigned int mask) |
| { |
| int sep = 0; |
| int i; |
| |
| for (i = 0; i < 20; ++i) |
| { |
| if (mask & 1) |
| { |
| if (sep) |
| *cp++ = ','; |
| *cp++ = 'f'; |
| if (i < 4) |
| *cp++ = i + 2 + '0'; |
| else |
| { |
| *cp++ = (i + 2) / 10 + 1 + '0'; |
| *cp++ = (i + 2) % 10 + '0'; |
| } |
| sep = 1; |
| } |
| mask >>= 1; |
| } |
| *cp = '\0'; |
| } |
| |
| static void |
| unw_print_abreg (char *cp, unsigned int abreg) |
| { |
| static const char * const special_reg[16] = |
| { |
| "pr", "psp", "@priunat", "rp", "ar.bsp", "ar.bspstore", "ar.rnat", |
| "ar.unat", "ar.fpsr", "ar.pfs", "ar.lc", |
| "Unknown11", "Unknown12", "Unknown13", "Unknown14", "Unknown15" |
| }; |
| |
| switch ((abreg >> 5) & 0x3) |
| { |
| case 0: /* gr */ |
| sprintf (cp, "r%u", (abreg & 0x1f)); |
| break; |
| |
| case 1: /* fr */ |
| sprintf (cp, "f%u", (abreg & 0x1f)); |
| break; |
| |
| case 2: /* br */ |
| sprintf (cp, "b%u", (abreg & 0x1f)); |
| break; |
| |
| case 3: /* special */ |
| strcpy (cp, special_reg[abreg & 0xf]); |
| break; |
| } |
| } |
| |
| static void |
| unw_print_xyreg (char *cp, unsigned int x, unsigned int ytreg) |
| { |
| switch ((x << 1) | ((ytreg >> 7) & 1)) |
| { |
| case 0: /* gr */ |
| sprintf (cp, "r%u", (ytreg & 0x1f)); |
| break; |
| |
| case 1: /* fr */ |
| sprintf (cp, "f%u", (ytreg & 0x1f)); |
| break; |
| |
| case 2: /* br */ |
| sprintf (cp, "b%u", (ytreg & 0x1f)); |
| break; |
| } |
| } |
| |
| #define UNW_REG_BSP "bsp" |
| #define UNW_REG_BSPSTORE "bspstore" |
| #define UNW_REG_FPSR "fpsr" |
| #define UNW_REG_LC "lc" |
| #define UNW_REG_PFS "pfs" |
| #define UNW_REG_PR "pr" |
| #define UNW_REG_PSP "psp" |
| #define UNW_REG_RNAT "rnat" |
| #define UNW_REG_RP "rp" |
| #define UNW_REG_UNAT "unat" |
| |
| typedef bfd_vma unw_word; |
| |
| #define UNW_DEC_BAD_CODE(code) \ |
| printf ("Unknown code 0x%02x\n", code) |
| |
| #define UNW_DEC_PROLOGUE(fmt, body, rlen, arg) \ |
| do \ |
| { \ |
| unw_rlen = rlen; \ |
| *(int *)arg = body; \ |
| printf (" %s:%s(rlen=%lu)\n", \ |
| fmt, body ? "body" : "prologue", (unsigned long) rlen); \ |
| } \ |
| while (0) |
| |
| #define UNW_DEC_PROLOGUE_GR(fmt, rlen, mask, grsave, arg) \ |
| do \ |
| { \ |
| char regname[16], maskstr[64], *sep; \ |
| \ |
| unw_rlen = rlen; \ |
| *(int *)arg = 0; \ |
| \ |
| maskstr[0] = '\0'; \ |
| sep = ""; \ |
| if (mask & 0x8) \ |
| { \ |
| strcat (maskstr, "rp"); \ |
| sep = ","; \ |
| } \ |
| if (mask & 0x4) \ |
| { \ |
| strcat (maskstr, sep); \ |
| strcat (maskstr, "ar.pfs"); \ |
| sep = ","; \ |
| } \ |
| if (mask & 0x2) \ |
| { \ |
| strcat (maskstr, sep); \ |
| strcat (maskstr, "psp"); \ |
| sep = ","; \ |
| } \ |
| if (mask & 0x1) \ |
| { \ |
| strcat (maskstr, sep); \ |
| strcat (maskstr, "pr"); \ |
| } \ |
| sprintf (regname, "r%u", grsave); \ |
| printf (" %s:prologue_gr(mask=[%s],grsave=%s,rlen=%lu)\n", \ |
| fmt, maskstr, regname, (unsigned long) rlen); \ |
| } \ |
| while (0) |
| |
| #define UNW_DEC_FR_MEM(fmt, frmask, arg) \ |
| do \ |
| { \ |
| char frstr[200]; \ |
| \ |
| unw_print_frmask (frstr, frmask); \ |
| printf ("\t%s:fr_mem(frmask=[%s])\n", fmt, frstr); \ |
| } \ |
| while (0) |
| |
| #define UNW_DEC_GR_MEM(fmt, grmask, arg) \ |
| do \ |
| { \ |
| char grstr[200]; \ |
| \ |
| unw_print_grmask (grstr, grmask); \ |
| printf ("\t%s:gr_mem(grmask=[%s])\n", fmt, grstr); \ |
| } \ |
| while (0) |
| |
| #define UNW_DEC_FRGR_MEM(fmt, grmask, frmask, arg) \ |
| do \ |
| { \ |
| char frstr[200], grstr[20]; \ |
| \ |
| unw_print_grmask (grstr, grmask); \ |
| unw_print_frmask (frstr, frmask); \ |
| printf ("\t%s:frgr_mem(grmask=[%s],frmask=[%s])\n", fmt, grstr, frstr); \ |
| } \ |
| while (0) |
| |
| #define UNW_DEC_BR_MEM(fmt, brmask, arg) \ |
| do \ |
| { \ |
| char brstr[20]; \ |
| \ |
| unw_print_brmask (brstr, brmask); \ |
| printf ("\t%s:br_mem(brmask=[%s])\n", fmt, brstr); \ |
| } \ |
| while (0) |
| |
| #define UNW_DEC_BR_GR(fmt, brmask, gr, arg) \ |
| do \ |
| { \ |
| char brstr[20]; \ |
| \ |
| unw_print_brmask (brstr, brmask); \ |
| printf ("\t%s:br_gr(brmask=[%s],gr=r%u)\n", fmt, brstr, gr); \ |
| } \ |
| while (0) |
| |
| #define UNW_DEC_REG_GR(fmt, src, dst, arg) \ |
| printf ("\t%s:%s_gr(reg=r%u)\n", fmt, src, dst) |
| |
| #define UNW_DEC_RP_BR(fmt, dst, arg) \ |
| printf ("\t%s:rp_br(reg=b%u)\n", fmt, dst) |
| |
| #define UNW_DEC_REG_WHEN(fmt, reg, t, arg) \ |
| printf ("\t%s:%s_when(t=%lu)\n", fmt, reg, (unsigned long) t) |
| |
| #define UNW_DEC_REG_SPREL(fmt, reg, spoff, arg) \ |
| printf ("\t%s:%s_sprel(spoff=0x%lx)\n", \ |
| fmt, reg, 4*(unsigned long)spoff) |
| |
| #define UNW_DEC_REG_PSPREL(fmt, reg, pspoff, arg) \ |
| printf ("\t%s:%s_psprel(pspoff=0x10-0x%lx)\n", \ |
| fmt, reg, 4*(unsigned long)pspoff) |
| |
| #define UNW_DEC_GR_GR(fmt, grmask, gr, arg) \ |
| do \ |
| { \ |
| char grstr[20]; \ |
| \ |
| unw_print_grmask (grstr, grmask); \ |
| printf ("\t%s:gr_gr(grmask=[%s],r%u)\n", fmt, grstr, gr); \ |
| } \ |
| while (0) |
| |
| #define UNW_DEC_ABI(fmt, abi, context, arg) \ |
| do \ |
| { \ |
| static const char * const abiname[] = \ |
| { \ |
| "@svr4", "@hpux", "@nt" \ |
| }; \ |
| char buf[20]; \ |
| const char *abistr = buf; \ |
| \ |
| if (abi < 3) \ |
| abistr = abiname[abi]; \ |
| else \ |
| sprintf (buf, "0x%x", abi); \ |
| printf ("\t%s:unwabi(abi=%s,context=0x%02x)\n", \ |
| fmt, abistr, context); \ |
| } \ |
| while (0) |
| |
| #define UNW_DEC_PRIUNAT_GR(fmt, r, arg) \ |
| printf ("\t%s:priunat_gr(reg=r%u)\n", fmt, r) |
| |
| #define UNW_DEC_PRIUNAT_WHEN_GR(fmt, t, arg) \ |
| printf ("\t%s:priunat_when_gr(t=%lu)\n", fmt, (unsigned long) t) |
| |
| #define UNW_DEC_PRIUNAT_WHEN_MEM(fmt, t, arg) \ |
| printf ("\t%s:priunat_when_mem(t=%lu)\n", fmt, (unsigned long) t) |
| |
| #define UNW_DEC_PRIUNAT_PSPREL(fmt, pspoff, arg) \ |
| printf ("\t%s:priunat_psprel(pspoff=0x10-0x%lx)\n", \ |
| fmt, 4*(unsigned long)pspoff) |
| |
| #define UNW_DEC_PRIUNAT_SPREL(fmt, spoff, arg) \ |
| printf ("\t%s:priunat_sprel(spoff=0x%lx)\n", \ |
| fmt, 4*(unsigned long)spoff) |
| |
| #define UNW_DEC_MEM_STACK_F(fmt, t, size, arg) \ |
| printf ("\t%s:mem_stack_f(t=%lu,size=%lu)\n", \ |
| fmt, (unsigned long) t, 16*(unsigned long)size) |
| |
| #define UNW_DEC_MEM_STACK_V(fmt, t, arg) \ |
| printf ("\t%s:mem_stack_v(t=%lu)\n", fmt, (unsigned long) t) |
| |
| #define UNW_DEC_SPILL_BASE(fmt, pspoff, arg) \ |
| printf ("\t%s:spill_base(pspoff=0x10-0x%lx)\n", \ |
| fmt, 4*(unsigned long)pspoff) |
| |
| #define UNW_DEC_SPILL_MASK(fmt, dp, arg, end) \ |
| do \ |
| { \ |
| static const char *spill_type = "-frb"; \ |
| unsigned const char *imaskp = dp; \ |
| unsigned char mask = 0; \ |
| bfd_vma insn = 0; \ |
| \ |
| /* PR 18420. */ \ |
| if ((dp + (unw_rlen / 4)) > end) \ |
| { \ |
| printf ("\nERROR: unwind length too long (0x%lx > 0x%lx)\n\n",\ |
| (long) (unw_rlen / 4), (long)(end - dp)); \ |
| /* FIXME: Should we reset unw_rlen ? */ \ |
| break; \ |
| } \ |
| printf ("\t%s:spill_mask(imask=[", fmt); \ |
| for (insn = 0; insn < unw_rlen; ++insn) \ |
| { \ |
| if ((insn % 4) == 0) \ |
| mask = *imaskp++; \ |
| if (insn > 0 && (insn % 3) == 0) \ |
| putchar (','); \ |
| putchar (spill_type[(mask >> (2 * (3 - (insn & 0x3)))) & 0x3]); \ |
| } \ |
| printf ("])\n"); \ |
| dp = imaskp; \ |
| } \ |
| while (0) |
| |
| #define UNW_DEC_SPILL_SPREL(fmt, t, abreg, spoff, arg) \ |
| do \ |
| { \ |
| char regname[20]; \ |
| \ |
| unw_print_abreg (regname, abreg); \ |
| printf ("\t%s:spill_sprel(reg=%s,t=%lu,spoff=0x%lx)\n", \ |
| fmt, regname, (unsigned long) t, 4*(unsigned long)off); \ |
| } \ |
| while (0) |
| |
| #define UNW_DEC_SPILL_PSPREL(fmt, t, abreg, pspoff, arg) \ |
| do \ |
| { \ |
| char regname[20]; \ |
| \ |
| unw_print_abreg (regname, abreg); \ |
| printf ("\t%s:spill_psprel(reg=%s,t=%lu,pspoff=0x10-0x%lx)\n", \ |
| fmt, regname, (unsigned long) t, 4*(unsigned long)pspoff); \ |
| } \ |
| while (0) |
| |
| #define UNW_DEC_RESTORE(fmt, t, abreg, arg) \ |
| do \ |
| { \ |
| char regname[20]; \ |
| \ |
| unw_print_abreg (regname, abreg); \ |
| printf ("\t%s:restore(t=%lu,reg=%s)\n", \ |
| fmt, (unsigned long) t, regname); \ |
| } \ |
| while (0) |
| |
| #define UNW_DEC_SPILL_REG(fmt, t, abreg, x, ytreg, arg) \ |
| do \ |
| { \ |
| char abregname[20], tregname[20]; \ |
| \ |
| unw_print_abreg (abregname, abreg); \ |
| unw_print_xyreg (tregname, x, ytreg); \ |
| printf ("\t%s:spill_reg(t=%lu,reg=%s,treg=%s)\n", \ |
| fmt, (unsigned long) t, abregname, tregname); \ |
| } \ |
| while (0) |
| |
| #define UNW_DEC_SPILL_SPREL_P(fmt, qp, t, abreg, spoff, arg) \ |
| do \ |
| { \ |
| char regname[20]; \ |
| \ |
| unw_print_abreg (regname, abreg); \ |
| printf ("\t%s:spill_sprel_p(qp=p%u,t=%lu,reg=%s,spoff=0x%lx)\n", \ |
| fmt, qp, (unsigned long) t, regname, 4 * (unsigned long)spoff); \ |
| } \ |
| while (0) |
| |
| #define UNW_DEC_SPILL_PSPREL_P(fmt, qp, t, abreg, pspoff, arg) \ |
| do \ |
| { \ |
| char regname[20]; \ |
| \ |
| unw_print_abreg (regname, abreg); \ |
| printf ("\t%s:spill_psprel_p(qp=p%u,t=%lu,reg=%s,pspoff=0x10-0x%lx)\n",\ |
| fmt, qp, (unsigned long) t, regname, 4*(unsigned long)pspoff);\ |
| } \ |
| while (0) |
| |
| #define UNW_DEC_RESTORE_P(fmt, qp, t, abreg, arg) \ |
| do \ |
| { \ |
| char regname[20]; \ |
| \ |
| unw_print_abreg (regname, abreg); \ |
| printf ("\t%s:restore_p(qp=p%u,t=%lu,reg=%s)\n", \ |
| fmt, qp, (unsigned long) t, regname); \ |
| } \ |
| while (0) |
| |
| #define UNW_DEC_SPILL_REG_P(fmt, qp, t, abreg, x, ytreg, arg) \ |
| do \ |
| { \ |
| char regname[20], tregname[20]; \ |
| \ |
| unw_print_abreg (regname, abreg); \ |
| unw_print_xyreg (tregname, x, ytreg); \ |
| printf ("\t%s:spill_reg_p(qp=p%u,t=%lu,reg=%s,treg=%s)\n", \ |
| fmt, qp, (unsigned long) t, regname, tregname); \ |
| } \ |
| while (0) |
| |
| #define UNW_DEC_LABEL_STATE(fmt, label, arg) \ |
| printf ("\t%s:label_state(label=%lu)\n", fmt, (unsigned long) label) |
| |
| #define UNW_DEC_COPY_STATE(fmt, label, arg) \ |
| printf ("\t%s:copy_state(label=%lu)\n", fmt, (unsigned long) label) |
| |
| #define UNW_DEC_EPILOGUE(fmt, t, ecount, arg) \ |
| printf ("\t%s:epilogue(t=%lu,ecount=%lu)\n", \ |
| fmt, (unsigned long) t, (unsigned long) ecount) |
| |
| /* |
| * 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 (modulo differences in the |
| * prototypes...). |
| * |
| * 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 (const unsigned char **dpp) |
| { |
| unsigned shift = 0; |
| unw_word byte, result = 0; |
| const unsigned char *bp = *dpp; |
| |
| while (1) |
| { |
| byte = *bp++; |
| result |= (byte & 0x7f) << shift; |
| |
| if ((byte & 0x80) == 0) |
| break; |
| |
| shift += 7; |
| } |
| |
| *dpp = bp; |
| |
| return result; |
| } |
| |
| static const unsigned char * |
| unw_decode_x1 (const unsigned char *dp, unsigned int code ATTRIBUTE_UNUSED, |
| void *arg ATTRIBUTE_UNUSED) |
| { |
| 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 const unsigned char * |
| unw_decode_x2 (const unsigned char *dp, unsigned int code ATTRIBUTE_UNUSED, |
| void *arg ATTRIBUTE_UNUSED) |
| { |
| 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 const unsigned char * |
| unw_decode_x3 (const unsigned char *dp, unsigned int code ATTRIBUTE_UNUSED, |
| void *arg ATTRIBUTE_UNUSED) |
| { |
| 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 const unsigned char * |
| unw_decode_x4 (const unsigned char *dp, unsigned int code ATTRIBUTE_UNUSED, |
| void *arg ATTRIBUTE_UNUSED) |
| { |
| 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 const unsigned char * |
| unw_decode_r1 (const unsigned char *dp, unsigned int code, void *arg, |
| const unsigned char * end ATTRIBUTE_UNUSED) |
| { |
| int body = (code & 0x20) != 0; |
| unw_word rlen; |
| |
| rlen = (code & 0x1f); |
| UNW_DEC_PROLOGUE ("R1", body, rlen, arg); |
| return dp; |
| } |
| |
| static const unsigned char * |
| unw_decode_r2 (const unsigned char *dp, unsigned int code, void *arg, |
| const unsigned char * end ATTRIBUTE_UNUSED) |
| { |
| 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 const unsigned char * |
| unw_decode_r3 (const unsigned char *dp, unsigned int code, void *arg, |
| const unsigned char * end ATTRIBUTE_UNUSED) |
| { |
| unw_word rlen; |
| |
| rlen = unw_decode_uleb128 (& dp); |
| UNW_DEC_PROLOGUE ("R3", ((code & 0x3) == 1), rlen, arg); |
| return dp; |
| } |
| |
| static const unsigned char * |
| unw_decode_p1 (const unsigned char *dp, unsigned int code, |
| void *arg ATTRIBUTE_UNUSED, |
| const unsigned char * end ATTRIBUTE_UNUSED) |
| { |
| unsigned char brmask = (code & 0x1f); |
| |
| UNW_DEC_BR_MEM ("P1", brmask, arg); |
| return dp; |
| } |
| |
| static const unsigned char * |
| unw_decode_p2_p5 (const unsigned char *dp, unsigned int code, |
| void *arg ATTRIBUTE_UNUSED, |
| const unsigned char * end) |
| { |
| 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, end); |
| 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 const unsigned char * |
| unw_decode_p6 (const unsigned char *dp, unsigned int code, |
| void *arg ATTRIBUTE_UNUSED, |
| const unsigned char * end ATTRIBUTE_UNUSED) |
| { |
| 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 const unsigned char * |
| unw_decode_p7_p10 (const unsigned char *dp, unsigned int code, void *arg, |
| const unsigned char * end ATTRIBUTE_UNUSED) |
| { |
| 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 const unsigned char * |
| unw_decode_b1 (const unsigned char *dp, unsigned int code, |
| void *arg ATTRIBUTE_UNUSED, |
| const unsigned char * end ATTRIBUTE_UNUSED) |
| { |
| 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 const unsigned char * |
| unw_decode_b2 (const unsigned char *dp, unsigned int code, |
| void *arg ATTRIBUTE_UNUSED, |
| const unsigned char * end ATTRIBUTE_UNUSED) |
| { |
| unw_word t; |
| |
| t = unw_decode_uleb128 (& dp); |
| UNW_DEC_EPILOGUE ("B2", t, (code & 0x1f), arg); |
| return dp; |
| } |
| |
| static const unsigned char * |
| unw_decode_b3_x4 (const unsigned char *dp, unsigned int code, void *arg, |
| const unsigned char * end ATTRIBUTE_UNUSED) |
| { |
| 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 const unsigned char *(*unw_decoder) |
| (const unsigned char *, unsigned int, void *, const unsigned char *); |
| |
| static const 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. */ |
| const unsigned char * |
| unw_decode (const unsigned char *dp, int inside_body, |
| void *ptr_inside_body, const unsigned char * end) |
| { |
| unw_decoder decoder; |
| unsigned char code; |
| |
| code = *dp++; |
| decoder = unw_decode_table[inside_body][code >> 5]; |
| return (*decoder) (dp, code, ptr_inside_body, end); |
| } |