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(linux_scratch_loc): New function.

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(tdep_access_reg): Rename from x86_access_reg() and fix up some things.
(tdep_access_fpreg): Likewise.

(Logical change 1.162)
This commit is contained in:
hp.com!davidm 2004-01-30 00:01:24 +00:00
parent 21595821bf
commit 21a24ca246
1 changed files with 182 additions and 62 deletions
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244
src/x86/Gregs-x86.c
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@ -1,5 +1,5 @@
/* libunwind - a platform-independent unwind library
Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
Copyright (c) 2002-2004 Hewlett-Packard Development Company, L.P.
Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
This file is part of libunwind.
@ -23,13 +23,119 @@ LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
#include "offsets.h"
#include "unwind_i.h"
HIDDEN int
x86_access_reg (struct cursor *c, unw_regnum_t reg, unw_word_t *valp,
int write)
static inline dwarf_loc_t
linux_scratch_loc (struct cursor *c, unw_regnum_t reg)
{
struct dwarf_loc loc = DWARF_LOC (0, 0);
unw_word_t addr = c->sigcontext_addr, fpstate_addr, off;
int ret, is_fpstate = 0;
switch (c->sigcontext_format)
{
case X86_SCF_NONE:
return DWARF_REG_LOC (&c->dwarf, reg);
case X86_SCF_LINUX_SIGFRAME:
break;
case X86_SCF_LINUX_RT_SIGFRAME:
addr += LINUX_UC_MCONTEXT_OFF;
break;
}
switch (reg)
{
case UNW_X86_GS: off = LINUX_SC_GS_OFF; break;
case UNW_X86_FS: off = LINUX_SC_FS_OFF; break;
case UNW_X86_ES: off = LINUX_SC_ES_OFF; break;
case UNW_X86_DS: off = LINUX_SC_DS_OFF; break;
case UNW_X86_EDI: off = LINUX_SC_EDI_OFF; break;
case UNW_X86_ESI: off = LINUX_SC_ESI_OFF; break;
case UNW_X86_EBP: off = LINUX_SC_EBP_OFF; break;
case UNW_X86_ESP: off = LINUX_SC_ESP_OFF; break;
case UNW_X86_EBX: off = LINUX_SC_EBX_OFF; break;
case UNW_X86_EDX: off = LINUX_SC_EDX_OFF; break;
case UNW_X86_ECX: off = LINUX_SC_ECX_OFF; break;
case UNW_X86_EAX: off = LINUX_SC_EAX_OFF; break;
case UNW_X86_TRAPNO: off = LINUX_SC_TRAPNO_OFF; break;
case UNW_X86_EIP: off = LINUX_SC_EIP_OFF; break;
case UNW_X86_CS: off = LINUX_SC_CS_OFF; break;
case UNW_X86_EFLAGS: off = LINUX_SC_EFLAGS_OFF; break;
case UNW_X86_SS: off = LINUX_SC_SS_OFF; break;
/* The following is probably not correct for all possible cases.
Somebody who understands this better should review this for
correctness. */
case UNW_X86_FCW: is_fpstate = 1; off = LINUX_FPSTATE_CW_OFF; break;
case UNW_X86_FSW: is_fpstate = 1; off = LINUX_FPSTATE_SW_OFF; break;
case UNW_X86_FTW: is_fpstate = 1; off = LINUX_FPSTATE_TAG_OFF; break;
case UNW_X86_FCS: is_fpstate = 1; off = LINUX_FPSTATE_CSSEL_OFF; break;
case UNW_X86_FIP: is_fpstate = 1; off = LINUX_FPSTATE_IPOFF_OFF; break;
case UNW_X86_FEA: is_fpstate = 1; off = LINUX_FPSTATE_DATAOFF_OFF; break;
case UNW_X86_FDS: is_fpstate = 1; off = LINUX_FPSTATE_DATASEL_OFF; break;
case UNW_X86_MXCSR: is_fpstate = 1; off = LINUX_FPSTATE_MXCSR_OFF; break;
/* stacked fp registers */
case UNW_X86_ST0: case UNW_X86_ST1: case UNW_X86_ST2: case UNW_X86_ST3:
case UNW_X86_ST4: case UNW_X86_ST5: case UNW_X86_ST6: case UNW_X86_ST7:
is_fpstate = 1;
off = LINUX_FPSTATE_ST0_OFF + 10*(reg - UNW_X86_ST0);
break;
/* SSE fp registers */
case UNW_X86_XMM0_lo: case UNW_X86_XMM0_hi:
case UNW_X86_XMM1_lo: case UNW_X86_XMM1_hi:
case UNW_X86_XMM2_lo: case UNW_X86_XMM2_hi:
case UNW_X86_XMM3_lo: case UNW_X86_XMM3_hi:
case UNW_X86_XMM4_lo: case UNW_X86_XMM4_hi:
case UNW_X86_XMM5_lo: case UNW_X86_XMM5_hi:
case UNW_X86_XMM6_lo: case UNW_X86_XMM6_hi:
case UNW_X86_XMM7_lo: case UNW_X86_XMM7_hi:
is_fpstate = 1;
off = LINUX_FPSTATE_XMM0_OFF + 8*(reg - UNW_X86_XMM0_lo);
break;
case UNW_X86_FOP:
case UNW_X86_TSS:
case UNW_X86_LDT:
default:
return DWARF_REG_LOC (&c->dwarf, reg);
}
if (is_fpstate)
{
if ((ret = dwarf_get (&c->dwarf,
DWARF_MEM_LOC (&c->dwarf,
addr + LINUX_SC_FPSTATE_OFF),
&fpstate_addr)) < 0)
return DWARF_NULL_LOC;
if (!fpstate_addr)
return DWARF_NULL_LOC;
return DWARF_MEM_LOC (c, fpstate_addr + off);
}
else
return DWARF_MEM_LOC (c, addr + off);
}
HIDDEN dwarf_loc_t
x86_scratch_loc (struct cursor *c, unw_regnum_t reg)
{
if (c->sigcontext_addr)
return linux_scratch_loc (c, reg);
else
return DWARF_REG_LOC (&c->dwarf, reg);
}
HIDDEN int
tdep_access_reg (struct cursor *c, unw_regnum_t reg, unw_word_t *valp,
int write)
{
dwarf_loc_t loc = DWARF_NULL_LOC;
switch (reg)
{
@ -47,38 +153,35 @@ x86_access_reg (struct cursor *c, unw_regnum_t reg, unw_word_t *valp,
return 0;
case UNW_X86_EAX: loc = c->dwarf.loc[EAX]; break;
case UNW_X86_EBX: loc = c->dwarf.loc[EBX]; break;
case UNW_X86_ECX: loc = c->dwarf.loc[ECX]; break;
case UNW_X86_EDX: loc = c->dwarf.loc[EDX]; break;
case UNW_X86_EBX: loc = c->dwarf.loc[EBX]; break;
case UNW_X86_ESP: loc = c->dwarf.loc[ESP]; break;
case UNW_X86_EBP: loc = c->dwarf.loc[EBP]; break;
case UNW_X86_ESI: loc = c->dwarf.loc[ESI]; break;
case UNW_X86_EDI: loc = c->dwarf.loc[EDI]; break;
case UNW_X86_EBP: loc = c->dwarf.loc[EBP]; break;
case UNW_X86_ESP: loc = c->dwarf.loc[ESP]; break;
case UNW_X86_EFLAGS: loc = c->dwarf.loc[EFLAGS]; break;
case UNW_X86_TRAPNO: loc = c->dwarf.loc[TRAPNO]; break;
#if 0
UNW_X86_EFLAGS
UNW_X86_TRAPNO
UNW_X86_FCW
UNW_X86_FSW
UNW_X86_FTW
UNW_X86_FOP
UNW_X86_FCS
UNW_X86_FIP
UNW_X86_FEA
UNW_X86_FDS
UNW_X86_MXCSR
UNW_X86_GS
UNW_X86_FS
UNW_X86_ES
UNW_X86_DS
UNW_X86_SS
UNW_X86_CS
UNW_X86_TSS
UNW_X86_LDT
#endif
case UNW_X86_FCW:
case UNW_X86_FSW:
case UNW_X86_FTW:
case UNW_X86_FOP:
case UNW_X86_FCS:
case UNW_X86_FIP:
case UNW_X86_FEA:
case UNW_X86_FDS:
case UNW_X86_MXCSR:
case UNW_X86_GS:
case UNW_X86_FS:
case UNW_X86_ES:
case UNW_X86_DS:
case UNW_X86_SS:
case UNW_X86_CS:
case UNW_X86_TSS:
case UNW_X86_LDT:
loc = x86_scratch_loc (c, reg);
break;
default:
Debug (1, "bad register number %u\n", reg);
@ -92,35 +195,52 @@ x86_access_reg (struct cursor *c, unw_regnum_t reg, unw_word_t *valp,
}
HIDDEN int
x86_access_fpreg (struct cursor *c, unw_regnum_t reg, unw_fpreg_t *valp,
int write)
tdep_access_fpreg (struct cursor *c, unw_regnum_t reg, unw_fpreg_t *valp,
int write)
{
#if 0
/* MMX/stacked-fp registers */
UNW_X86_ST0, /* fp return value */
UNW_X86_ST1, /* scratch */
UNW_X86_ST2, /* scratch */
UNW_X86_ST3, /* scratch */
UNW_X86_ST4, /* scratch */
UNW_X86_ST5, /* scratch */
UNW_X86_ST6, /* scratch */
UNW_X86_ST7, /* scratch */
UNW_X86_XMM0_lo, /* scratch */
UNW_X86_XMM0_hi, /* scratch */
UNW_X86_XMM1_lo, /* scratch */
UNW_X86_XMM1_hi, /* scratch */
UNW_X86_XMM2_lo, /* scratch */
UNW_X86_XMM2_hi, /* scratch */
UNW_X86_XMM3_lo, /* scratch */
UNW_X86_XMM3_hi, /* scratch */
UNW_X86_XMM4_lo, /* scratch */
UNW_X86_XMM4_hi, /* scratch */
UNW_X86_XMM5_lo, /* scratch */
UNW_X86_XMM5_hi, /* scratch */
UNW_X86_XMM6_lo, /* scratch */
UNW_X86_XMM6_hi, /* scratch */
UNW_X86_XMM7_lo, /* scratch */
UNW_X86_XMM7_hi, /* scratch */
#endif
return -UNW_EINVAL;
struct dwarf_loc loc = DWARF_NULL_LOC;
switch (reg)
{
case UNW_X86_ST0:
loc = c->dwarf.loc[ST0];
break;
/* stacked fp registers */
case UNW_X86_ST1:
case UNW_X86_ST2:
case UNW_X86_ST3:
case UNW_X86_ST4:
case UNW_X86_ST5:
case UNW_X86_ST6:
case UNW_X86_ST7:
/* SSE fp registers */
case UNW_X86_XMM0_lo:
case UNW_X86_XMM0_hi:
case UNW_X86_XMM1_lo:
case UNW_X86_XMM1_hi:
case UNW_X86_XMM2_lo:
case UNW_X86_XMM2_hi:
case UNW_X86_XMM3_lo:
case UNW_X86_XMM3_hi:
case UNW_X86_XMM4_lo:
case UNW_X86_XMM4_hi:
case UNW_X86_XMM5_lo:
case UNW_X86_XMM5_hi:
case UNW_X86_XMM6_lo:
case UNW_X86_XMM6_hi:
case UNW_X86_XMM7_lo:
case UNW_X86_XMM7_hi:
loc = x86_scratch_loc (c, reg);
break;
default:
Debug (1, "bad register number %u\n", reg);
return -UNW_EBADREG;
}
if (write)
return dwarf_putfp (&c->dwarf, loc, *valp);
else
return dwarf_getfp (&c->dwarf, loc, valp);
}