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Diffstat (limited to 'binutils/unwind-ia64.c')
| -rw-r--r-- | binutils/unwind-ia64.c | 1085 |
1 files changed, 1085 insertions, 0 deletions
diff --git a/binutils/unwind-ia64.c b/binutils/unwind-ia64.c new file mode 100644 index 0000000..642f9b2 --- /dev/null +++ b/binutils/unwind-ia64.c @@ -0,0 +1,1085 @@ +/* unwind-ia64.c -- utility routines to dump IA-64 unwind info for readelf. + Copyright (C) 2000-2014 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) \ + do \ + { \ + static const char *spill_type = "-frb"; \ + unsigned const char *imaskp = dp; \ + unsigned char mask = 0; \ + bfd_vma insn = 0; \ + \ + 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 **); +static const unsigned char *unw_decode_x1 + (const unsigned char *, unsigned int, void *); +static const unsigned char *unw_decode_x2 + (const unsigned char *, unsigned int, void *); +static const unsigned char *unw_decode_x3 + (const unsigned char *, unsigned int, void *); +static const unsigned char *unw_decode_x4 + (const unsigned char *, unsigned int, void *); +static const unsigned char *unw_decode_r1 + (const unsigned char *, unsigned int, void *); +static const unsigned char *unw_decode_r2 + (const unsigned char *, unsigned int, void *); +static const unsigned char *unw_decode_r3 + (const unsigned char *, unsigned int, void *); +static const unsigned char *unw_decode_p1 + (const unsigned char *, unsigned int, void *); +static const unsigned char *unw_decode_p2_p5 + (const unsigned char *, unsigned int, void *); +static const unsigned char *unw_decode_p6 + (const unsigned char *, unsigned int, void *); +static const unsigned char *unw_decode_p7_p10 + (const unsigned char *, unsigned int, void *); +static const unsigned char *unw_decode_b1 + (const unsigned char *, unsigned int, void *); +static const unsigned char *unw_decode_b2 + (const unsigned char *, unsigned int, void *); +static const unsigned char *unw_decode_b3_x4 + (const unsigned char *, unsigned int, void *); + +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) +{ + 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) +{ + 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) +{ + 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) +{ + 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) +{ + 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 const unsigned char * +unw_decode_p6 (const unsigned char *dp, unsigned int code, + void *arg 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) +{ + 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) +{ + 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) +{ + 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) +{ + 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 *); + +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) +{ + unw_decoder decoder; + unsigned char code; + + code = *dp++; + decoder = unw_decode_table[inside_body][code >> 5]; + return (*decoder) (dp, code, ptr_inside_body); +} |