mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 11:44:01 +08:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
460 lines
12 KiB
C
460 lines
12 KiB
C
/*
|
|
* 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;
|
|
}
|