mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-12-24 12:13:42 +01:00
Rename: src/ia64/Gstep-ia64.c -> src/ia64/Gstep.c
(Logical change 1.241)
This commit is contained in:
homeip.net!davidm
parent
b6d4bfeb29
commit
f1734db273
1 changed files with 347 additions and 0 deletions
347
src/ia64/Gstep.c
Normal file
347
src/ia64/Gstep.c
Normal file
|
|
@ -0,0 +1,347 @@
|
|||
/* libunwind - a platform-independent unwind library
|
||||
Copyright (C) 2001-2004 Hewlett-Packard Co
|
||||
Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
|
||||
|
||||
This file is part of libunwind.
|
||||
|
||||
Permission is hereby granted, free of charge, to any person obtaining
|
||||
a copy of this software and associated documentation files (the
|
||||
"Software"), to deal in the Software without restriction, including
|
||||
without limitation the rights to use, copy, modify, merge, publish,
|
||||
distribute, sublicense, and/or sell copies of the Software, and to
|
||||
permit persons to whom the Software is furnished to do so, subject to
|
||||
the following conditions:
|
||||
|
||||
The above copyright notice and this permission notice shall be
|
||||
included in all copies or substantial portions of the Software.
|
||||
|
||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
||||
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||||
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
||||
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
||||
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"
|
||||
|
||||
static inline int
|
||||
linux_sigtramp (struct cursor *c, unw_word_t *num_regsp)
|
||||
{
|
||||
#if defined(UNW_LOCAL_ONLY) && !defined(__linux)
|
||||
return -UNW_EINVAL;
|
||||
#else
|
||||
unw_word_t sc_addr;
|
||||
int ret;
|
||||
|
||||
if ((ret = ia64_get (c, IA64_LOC_ADDR (c->sp + 0x10
|
||||
+ LINUX_SIGFRAME_ARG2_OFF, 0),
|
||||
&sc_addr)) < 0)
|
||||
return ret;
|
||||
|
||||
c->sigcontext_addr = sc_addr;
|
||||
|
||||
if (!IA64_IS_REG_LOC (c->loc[IA64_REG_IP])
|
||||
&& IA64_GET_ADDR (c->loc[IA64_REG_IP]) == sc_addr + LINUX_SC_BR_OFF + 8)
|
||||
{
|
||||
/* Linux kernels before 2.4.19 and 2.5.10 had buggy
|
||||
unwind info for sigtramp. Fix it up here. */
|
||||
c->loc[IA64_REG_IP] = IA64_LOC_ADDR (sc_addr + LINUX_SC_IP_OFF, 0);
|
||||
c->cfm_loc = IA64_LOC_ADDR (sc_addr + LINUX_SC_CFM_OFF, 0);
|
||||
}
|
||||
|
||||
/* do what can't be described by unwind directives: */
|
||||
c->loc[IA64_REG_PFS] = IA64_LOC_ADDR (sc_addr + LINUX_SC_AR_PFS_OFF, 0);
|
||||
*num_regsp = c->cfm & 0x7f; /* size of frame */
|
||||
return 0;
|
||||
#endif
|
||||
}
|
||||
|
||||
static inline int
|
||||
linux_interrupt (struct cursor *c, unw_word_t *num_regsp, int marker)
|
||||
{
|
||||
#if defined(UNW_LOCAL_ONLY)
|
||||
/* Perhaps libunwind will some day become the Linux kernel unwinder.
|
||||
Until such time, linux_interrupt() is needed only for non-local
|
||||
unwinding. */
|
||||
return -UNW_EINVAL;
|
||||
#else
|
||||
unw_word_t sc_addr, num_regs;
|
||||
ia64_loc_t pfs_loc;
|
||||
|
||||
sc_addr = c->sigcontext_addr = c->sp + 0x10;
|
||||
|
||||
if ((c->pr & (1UL << LINUX_PT_P_NONSYS)) != 0)
|
||||
num_regs = c->cfm & 0x7f;
|
||||
else
|
||||
num_regs = 0;
|
||||
|
||||
/* do what can't be described by unwind directives: */
|
||||
if (marker == ABI_MARKER_OLD_LINUX_INTERRUPT)
|
||||
pfs_loc = IA64_LOC_ADDR (sc_addr + LINUX_OLD_PT_PFS_OFF, 0);
|
||||
else
|
||||
pfs_loc = IA64_LOC_ADDR (sc_addr + LINUX_PT_PFS_OFF, 0);
|
||||
c->loc[IA64_REG_PFS] = pfs_loc;
|
||||
*num_regsp = num_regs; /* size of frame */
|
||||
return 0;
|
||||
#endif
|
||||
}
|
||||
|
||||
static inline int
|
||||
hpux_sigtramp (struct cursor *c, unw_word_t *num_regsp)
|
||||
{
|
||||
#if defined(UNW_LOCAL_ONLY) && !defined(__hpux)
|
||||
return -UNW_EINVAL;
|
||||
#else
|
||||
unw_word_t sc_addr, bsp, bspstore;
|
||||
ia64_loc_t sc_loc;
|
||||
int ret, i;
|
||||
|
||||
/* HP-UX passes the address of ucontext_t in r32: */
|
||||
if ((ret = ia64_get_stacked (c, 32, &sc_loc, NULL)) < 0)
|
||||
return ret;
|
||||
if ((ret = ia64_get (c, sc_loc, &sc_addr)) < 0)
|
||||
return ret;
|
||||
|
||||
c->sigcontext_addr = sc_addr;
|
||||
|
||||
/* Now mark all (preserved) registers as coming from the
|
||||
signal context: */
|
||||
c->cfm_loc = IA64_LOC_UC_REG (UNW_IA64_CFM, sc_addr);
|
||||
c->loc[IA64_REG_PRI_UNAT_MEM] = IA64_NULL_LOC;
|
||||
c->loc[IA64_REG_PSP] = IA64_LOC_UC_REG (UNW_IA64_GR + 12, sc_addr);
|
||||
c->loc[IA64_REG_BSP] = IA64_LOC_UC_REG (UNW_IA64_AR_BSP, sc_addr);
|
||||
c->loc[IA64_REG_BSPSTORE] = IA64_LOC_UC_REG (UNW_IA64_AR_BSPSTORE, sc_addr);
|
||||
c->loc[IA64_REG_PFS] = IA64_LOC_UC_REG (UNW_IA64_AR_PFS, sc_addr);
|
||||
c->loc[IA64_REG_RNAT] = IA64_LOC_UC_REG (UNW_IA64_AR_RNAT, sc_addr);
|
||||
c->loc[IA64_REG_IP] = IA64_LOC_UC_REG (UNW_IA64_IP, sc_addr);
|
||||
c->loc[IA64_REG_R4] = IA64_LOC_UC_REG (UNW_IA64_GR + 4, sc_addr);
|
||||
c->loc[IA64_REG_R5] = IA64_LOC_UC_REG (UNW_IA64_GR + 5, sc_addr);
|
||||
c->loc[IA64_REG_R6] = IA64_LOC_UC_REG (UNW_IA64_GR + 6, sc_addr);
|
||||
c->loc[IA64_REG_R7] = IA64_LOC_UC_REG (UNW_IA64_GR + 7, sc_addr);
|
||||
c->loc[IA64_REG_NAT4] = IA64_LOC_UC_REG (UNW_IA64_NAT + 4, sc_addr);
|
||||
c->loc[IA64_REG_NAT5] = IA64_LOC_UC_REG (UNW_IA64_NAT + 5, sc_addr);
|
||||
c->loc[IA64_REG_NAT6] = IA64_LOC_UC_REG (UNW_IA64_NAT + 6, sc_addr);
|
||||
c->loc[IA64_REG_NAT7] = IA64_LOC_UC_REG (UNW_IA64_NAT + 7, sc_addr);
|
||||
c->loc[IA64_REG_UNAT] = IA64_LOC_UC_REG (UNW_IA64_AR_UNAT, sc_addr);
|
||||
c->loc[IA64_REG_PR] = IA64_LOC_UC_REG (UNW_IA64_PR, sc_addr);
|
||||
c->loc[IA64_REG_LC] = IA64_LOC_UC_REG (UNW_IA64_AR_LC, sc_addr);
|
||||
c->loc[IA64_REG_FPSR] = IA64_LOC_UC_REG (UNW_IA64_AR_FPSR, sc_addr);
|
||||
c->loc[IA64_REG_B1] = IA64_LOC_UC_REG (UNW_IA64_BR + 1, sc_addr);
|
||||
c->loc[IA64_REG_B2] = IA64_LOC_UC_REG (UNW_IA64_BR + 2, sc_addr);
|
||||
c->loc[IA64_REG_B3] = IA64_LOC_UC_REG (UNW_IA64_BR + 3, sc_addr);
|
||||
c->loc[IA64_REG_B4] = IA64_LOC_UC_REG (UNW_IA64_BR + 4, sc_addr);
|
||||
c->loc[IA64_REG_B5] = IA64_LOC_UC_REG (UNW_IA64_BR + 5, sc_addr);
|
||||
c->loc[IA64_REG_F2] = IA64_LOC_UC_REG (UNW_IA64_FR + 2, sc_addr);
|
||||
c->loc[IA64_REG_F3] = IA64_LOC_UC_REG (UNW_IA64_FR + 3, sc_addr);
|
||||
c->loc[IA64_REG_F4] = IA64_LOC_UC_REG (UNW_IA64_FR + 4, sc_addr);
|
||||
c->loc[IA64_REG_F5] = IA64_LOC_UC_REG (UNW_IA64_FR + 5, sc_addr);
|
||||
for (i = 0; i < 16; ++i)
|
||||
c->loc[IA64_REG_F16 + i] = IA64_LOC_UC_REG (UNW_IA64_FR + 16 + i, sc_addr);
|
||||
|
||||
c->pi.flags |= UNW_PI_FLAG_IA64_RBS_SWITCH;
|
||||
|
||||
/* update the CFM cache: */
|
||||
if ((ret = ia64_get (c, c->cfm_loc, &c->cfm)) < 0)
|
||||
return ret;
|
||||
/* update the PSP cache: */
|
||||
if ((ret = ia64_get (c, c->loc[IA64_REG_PSP], &c->psp)) < 0)
|
||||
return ret;
|
||||
|
||||
if ((ret = ia64_get (c, c->loc[IA64_REG_BSP], &bsp)) < 0
|
||||
|| (ret = ia64_get (c, c->loc[IA64_REG_BSPSTORE], &bspstore)) < 0)
|
||||
return ret;
|
||||
if (bspstore < bsp)
|
||||
/* Dirty partition got spilled into the ucontext_t structure
|
||||
itself. We'll need to access it via uc_access(3). */
|
||||
rbs_switch (c, bsp, bspstore, IA64_LOC_UC_ADDR (bsp | 0x1f8, 0));
|
||||
|
||||
*num_regsp = 0;
|
||||
return 0;
|
||||
#endif
|
||||
}
|
||||
|
||||
|
||||
static inline int
|
||||
check_rbs_switch (struct cursor *c)
|
||||
{
|
||||
unw_word_t saved_bsp, saved_bspstore, loadrs, ndirty;
|
||||
int ret = 0;
|
||||
|
||||
saved_bsp = c->bsp;
|
||||
if (c->pi.flags & UNW_PI_FLAG_IA64_RBS_SWITCH)
|
||||
{
|
||||
/* Got ourselves a frame that has saved ar.bspstore, ar.bsp,
|
||||
and ar.rnat, so we're all set for rbs-switching: */
|
||||
if ((ret = ia64_get (c, c->loc[IA64_REG_BSP], &saved_bsp)) < 0
|
||||
|| (ret = ia64_get (c, c->loc[IA64_REG_BSPSTORE], &saved_bspstore)))
|
||||
return ret;
|
||||
}
|
||||
else if ((c->abi_marker == ABI_MARKER_LINUX_SIGTRAMP
|
||||
|| c->abi_marker == ABI_MARKER_OLD_LINUX_SIGTRAMP)
|
||||
&& !IA64_IS_REG_LOC (c->loc[IA64_REG_BSP])
|
||||
&& (IA64_GET_ADDR (c->loc[IA64_REG_BSP])
|
||||
== c->sigcontext_addr + LINUX_SC_AR_BSP_OFF))
|
||||
{
|
||||
/* When Linux delivers a signal on an alternate stack, it
|
||||
does things a bit differently from what the unwind
|
||||
conventions allow us to describe: instead of saving
|
||||
ar.rnat, ar.bsp, and ar.bspstore, it saves the former two
|
||||
plus the "loadrs" value. Because of this, we need to
|
||||
detect & record a potential rbs-area switch
|
||||
manually... */
|
||||
|
||||
/* If ar.bsp has been saved already AND the current bsp is
|
||||
not equal to the saved value, then we know for sure that
|
||||
we're past the point where the backing store has been
|
||||
switched (and before the point where it's restored). */
|
||||
if ((ret = ia64_get (c, IA64_LOC_ADDR (c->sigcontext_addr
|
||||
+ LINUX_SC_AR_BSP_OFF, 0),
|
||||
&saved_bsp) < 0)
|
||||
|| (ret = ia64_get (c, IA64_LOC_ADDR (c->sigcontext_addr
|
||||
+ LINUX_SC_LOADRS_OFF, 0),
|
||||
&loadrs) < 0))
|
||||
return ret;
|
||||
loadrs >>= 16;
|
||||
ndirty = ia64_rse_num_regs (c->bsp - loadrs, c->bsp);
|
||||
saved_bspstore = ia64_rse_skip_regs (saved_bsp, -ndirty);
|
||||
}
|
||||
|
||||
if (saved_bsp == c->bsp)
|
||||
return 0;
|
||||
|
||||
return rbs_switch (c, saved_bsp, saved_bspstore, c->loc[IA64_REG_RNAT]);
|
||||
}
|
||||
|
||||
static inline int
|
||||
update_frame_state (struct cursor *c)
|
||||
{
|
||||
unw_word_t prev_ip, prev_sp, prev_bsp, ip, num_regs;
|
||||
int ret;
|
||||
|
||||
prev_ip = c->ip;
|
||||
prev_sp = c->sp;
|
||||
prev_bsp = c->bsp;
|
||||
|
||||
/* Update the IP cache (do this first: if we reach the end of the
|
||||
frame-chain, the rest of the info may not be valid/useful
|
||||
anymore. */
|
||||
ret = ia64_get (c, c->loc[IA64_REG_IP], &ip);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
c->ip = ip;
|
||||
|
||||
if ((ip & 0xc) != 0)
|
||||
{
|
||||
/* don't let obviously bad addresses pollute the cache */
|
||||
Debug (1, "rejecting bad ip=0x%lx\n", (long) c->ip);
|
||||
return -UNW_EINVALIDIP;
|
||||
}
|
||||
if (ip == 0)
|
||||
/* end of frame-chain reached */
|
||||
return 0;
|
||||
|
||||
c->cfm_loc = c->loc[IA64_REG_PFS];
|
||||
/* update the CFM cache: */
|
||||
ret = ia64_get (c, c->cfm_loc, &c->cfm);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
num_regs = 0;
|
||||
if (unlikely (c->abi_marker))
|
||||
{
|
||||
c->last_abi_marker = c->abi_marker;
|
||||
switch (c->abi_marker)
|
||||
{
|
||||
case ABI_MARKER_LINUX_SIGTRAMP:
|
||||
case ABI_MARKER_OLD_LINUX_SIGTRAMP:
|
||||
c->as->abi = ABI_LINUX;
|
||||
if ((ret = linux_sigtramp (c, &num_regs)) < 0)
|
||||
return ret;
|
||||
break;
|
||||
|
||||
case ABI_MARKER_OLD_LINUX_INTERRUPT:
|
||||
case ABI_MARKER_LINUX_INTERRUPT:
|
||||
c->as->abi = ABI_LINUX;
|
||||
if ((ret = linux_interrupt (c, &num_regs, c->abi_marker)) < 0)
|
||||
return ret;
|
||||
break;
|
||||
|
||||
case ABI_MARKER_HP_UX_SIGTRAMP:
|
||||
c->as->abi = ABI_HPUX;
|
||||
if ((ret = hpux_sigtramp (c, &num_regs)) < 0)
|
||||
return ret;
|
||||
break;
|
||||
|
||||
default:
|
||||
Debug (1, "unknown ABI marker: ABI=%u, context=%u\n",
|
||||
c->abi_marker >> 8, c->abi_marker & 0xff);
|
||||
return -UNW_EINVAL;
|
||||
}
|
||||
Debug (12, "sigcontext_addr=%lx (ret=%d)\n",
|
||||
(unsigned long) c->sigcontext_addr, ret);
|
||||
|
||||
c->sigcontext_off = c->sigcontext_addr - c->sp;
|
||||
|
||||
/* update the IP cache: */
|
||||
if ((ret = ia64_get (c, c->loc[IA64_REG_IP], &ip)) < 0)
|
||||
return ret;
|
||||
c->ip = ip;
|
||||
if (ip == 0)
|
||||
/* end of frame-chain reached */
|
||||
return 0;
|
||||
}
|
||||
else
|
||||
num_regs = (c->cfm >> 7) & 0x7f; /* size of locals */
|
||||
|
||||
if (!IA64_IS_NULL_LOC (c->loc[IA64_REG_BSP]))
|
||||
{
|
||||
ret = check_rbs_switch (c);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
}
|
||||
|
||||
c->bsp = ia64_rse_skip_regs (c->bsp, -num_regs);
|
||||
|
||||
c->sp = c->psp;
|
||||
c->abi_marker = 0;
|
||||
|
||||
if (c->ip == prev_ip && c->sp == prev_sp && c->bsp == prev_bsp)
|
||||
{
|
||||
dprintf ("%s: ip, sp, and bsp unchanged; stopping here (ip=0x%lx)\n",
|
||||
__FUNCTION__, (long) ip);
|
||||
return -UNW_EBADFRAME;
|
||||
}
|
||||
|
||||
/* as we unwind, the saved ar.unat becomes the primary unat: */
|
||||
c->loc[IA64_REG_PRI_UNAT_MEM] = c->loc[IA64_REG_UNAT];
|
||||
|
||||
/* restore the predicates: */
|
||||
ret = ia64_get (c, c->loc[IA64_REG_PR], &c->pr);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
c->pi_valid = 0;
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
PROTECTED int
|
||||
unw_step (unw_cursor_t *cursor)
|
||||
{
|
||||
struct cursor *c = (struct cursor *) cursor;
|
||||
int ret;
|
||||
|
||||
Debug (2, "(cursor=%p)\n", c);
|
||||
|
||||
ret = ia64_find_save_locs (c);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = update_frame_state (c);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
return (c->ip == 0) ? 0 : 1;
|
||||
}
|
||||
Loading…
Reference in a new issue