mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-06-30 21:21:45 +02:00
(linux_sigtramp): New function.
(hpux_sigtramp): Ditto. (update_frame_state): Use abi_marker to decide how to handle a special frame. (Logical change 1.87)
This commit is contained in:
mostang.com!davidm
parent
bd28baa280
commit
4bc8b02277
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@ -27,6 +27,113 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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#include "rse.h"
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#include "unwind_i.h"
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static inline int
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linux_sigtramp (struct cursor *c, unw_word_t *num_regsp)
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{
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#if defined(UNW_LOCAL_ONLY) && !defined(__linux)
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return -UNW_EINVAL;
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#else
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unw_word_t sc_addr;
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int ret;
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if ((ret = ia64_get (c, IA64_LOC_ADDR (c->sp + 0x10
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+ LINUX_SIGFRAME_ARG2_OFF, 0),
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&sc_addr)) < 0)
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return ret;
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c->sigcontext_addr = sc_addr;
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if (!IA64_IS_REG_LOC (c->loc[IA64_REG_IP])
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&& IA64_GET_ADDR (c->loc[IA64_REG_IP]) == sc_addr + LINUX_SC_BR_OFF + 8)
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{
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/* Linux kernels before 2.4.19 and 2.5.10 had buggy
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unwind info for sigtramp. Fix it up here. */
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c->loc[IA64_REG_IP] = IA64_LOC_ADDR (sc_addr + LINUX_SC_IP_OFF, 0);
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c->cfm_loc = IA64_LOC_ADDR (sc_addr + LINUX_SC_CFM_OFF, 0);
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}
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/* do what can't be described by unwind directives: */
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c->loc[IA64_REG_PFS] = IA64_LOC_ADDR (sc_addr + LINUX_SC_AR_PFS_OFF, 0);
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*num_regsp = c->cfm & 0x7f; /* size of frame */
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return 0;
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#endif
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}
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static inline int
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hpux_sigtramp (struct cursor *c, unw_word_t *num_regsp)
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{
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#if defined(UNW_LOCAL_ONLY) && !defined(__hpux)
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return -UNW_EINVAL;
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#else
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unw_word_t sc_addr, bsp, bspstore;
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ia64_loc_t sc_loc;
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int ret, i;
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/* HP-UX passes the address of ucontext_t in r32: */
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if ((ret = ia64_get_stacked (c, 32, &sc_loc, NULL)) < 0)
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return ret;
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if ((ret = ia64_get (c, sc_loc, &sc_addr)) < 0)
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return ret;
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c->sigcontext_addr = sc_addr;
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/* Now mark all (preserved) registers as coming from the
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signal context: */
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c->cfm_loc = IA64_LOC_UC_REG (UNW_IA64_CFM, sc_addr);
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c->loc[IA64_REG_PRI_UNAT_MEM] = IA64_NULL_LOC;
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c->loc[IA64_REG_PSP] = IA64_LOC_UC_REG (UNW_IA64_GR + 12, sc_addr);
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c->loc[IA64_REG_BSP] = IA64_LOC_UC_REG (UNW_IA64_AR_BSP, sc_addr);
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c->loc[IA64_REG_BSPSTORE] = IA64_LOC_UC_REG (UNW_IA64_AR_BSPSTORE, sc_addr);
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c->loc[IA64_REG_PFS] = IA64_LOC_UC_REG (UNW_IA64_AR_PFS, sc_addr);
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c->loc[IA64_REG_RNAT] = IA64_LOC_UC_REG (UNW_IA64_AR_RNAT, sc_addr);
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c->loc[IA64_REG_IP] = IA64_LOC_UC_REG (UNW_IA64_IP, sc_addr);
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c->loc[IA64_REG_R4] = IA64_LOC_UC_REG (UNW_IA64_GR + 4, sc_addr);
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c->loc[IA64_REG_R5] = IA64_LOC_UC_REG (UNW_IA64_GR + 5, sc_addr);
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c->loc[IA64_REG_R6] = IA64_LOC_UC_REG (UNW_IA64_GR + 6, sc_addr);
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c->loc[IA64_REG_R7] = IA64_LOC_UC_REG (UNW_IA64_GR + 7, sc_addr);
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c->loc[IA64_REG_NAT4] = IA64_LOC_UC_REG (UNW_IA64_NAT + 4, sc_addr);
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c->loc[IA64_REG_NAT5] = IA64_LOC_UC_REG (UNW_IA64_NAT + 5, sc_addr);
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c->loc[IA64_REG_NAT6] = IA64_LOC_UC_REG (UNW_IA64_NAT + 6, sc_addr);
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c->loc[IA64_REG_NAT7] = IA64_LOC_UC_REG (UNW_IA64_NAT + 7, sc_addr);
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c->loc[IA64_REG_UNAT] = IA64_LOC_UC_REG (UNW_IA64_AR_UNAT, sc_addr);
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c->loc[IA64_REG_PR] = IA64_LOC_UC_REG (UNW_IA64_PR, sc_addr);
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c->loc[IA64_REG_LC] = IA64_LOC_UC_REG (UNW_IA64_AR_LC, sc_addr);
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c->loc[IA64_REG_FPSR] = IA64_LOC_UC_REG (UNW_IA64_AR_FPSR, sc_addr);
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c->loc[IA64_REG_B1] = IA64_LOC_UC_REG (UNW_IA64_BR + 1, sc_addr);
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c->loc[IA64_REG_B2] = IA64_LOC_UC_REG (UNW_IA64_BR + 2, sc_addr);
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c->loc[IA64_REG_B3] = IA64_LOC_UC_REG (UNW_IA64_BR + 3, sc_addr);
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c->loc[IA64_REG_B4] = IA64_LOC_UC_REG (UNW_IA64_BR + 4, sc_addr);
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c->loc[IA64_REG_B5] = IA64_LOC_UC_REG (UNW_IA64_BR + 5, sc_addr);
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c->loc[IA64_REG_F2] = IA64_LOC_UC_REG (UNW_IA64_FR + 2, sc_addr);
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c->loc[IA64_REG_F3] = IA64_LOC_UC_REG (UNW_IA64_FR + 3, sc_addr);
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c->loc[IA64_REG_F4] = IA64_LOC_UC_REG (UNW_IA64_FR + 4, sc_addr);
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c->loc[IA64_REG_F5] = IA64_LOC_UC_REG (UNW_IA64_FR + 5, sc_addr);
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for (i = 0; i < 16; ++i)
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c->loc[IA64_REG_F16 + i] = IA64_LOC_UC_REG (UNW_IA64_FR + 16 + i, sc_addr);
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c->pi.flags |= UNW_PI_FLAG_IA64_RBS_SWITCH;
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/* update the CFM cache: */
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if ((ret = ia64_get (c, c->cfm_loc, &c->cfm)) < 0)
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return ret;
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/* update the PSP cache: */
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if ((ret = ia64_get (c, c->loc[IA64_REG_PSP], &c->psp)) < 0)
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return ret;
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if ((ret = ia64_get (c, c->loc[IA64_REG_BSP], &bsp)) < 0
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|| (ret = ia64_get (c, c->loc[IA64_REG_BSPSTORE], &bspstore)) < 0)
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return ret;
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if (bspstore < bsp)
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/* Dirty partition got spilled into the ucontext_t structure
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itself. We'll need to access it via uc_access(3). */
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rbs_switch (c, bsp, bspstore, IA64_LOC_UC_ADDR (bsp | 0x1f8, 0));
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*num_regsp = 0;
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return 0;
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#endif
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}
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static inline int
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check_rbs_switch (struct cursor *c)
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{
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@ -112,57 +219,21 @@ update_frame_state (struct cursor *c)
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return ret;
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num_regs = 0;
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if (c->abi_marker)
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if (unlikely (c->abi_marker))
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{
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switch (c->abi_marker)
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{
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#if !defined(UNW_LOCAL_ONLY) || defined(__linux)
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case ABI_MARKER_LINUX_SIGTRAMP:
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if ((ret = ia64_get (c, IA64_LOC_ADDR (c->sp + 0x10
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+ LINUX_SIGFRAME_ARG2_OFF, 0),
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&c->sigcontext_addr)) < 0)
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c->as->abi = ABI_LINUX;
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if ((ret = linux_sigtramp (c, &num_regs)) < 0)
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return ret;
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if (!IA64_IS_REG_LOC (c->loc[IA64_REG_IP])
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&& (IA64_GET_ADDR (c->loc[IA64_REG_IP])
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== c->sigcontext_addr + LINUX_SC_BR_OFF + 0*8))
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{
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/* Linux kernels before 2.4.19 and 2.5.10 had buggy
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unwind info for sigtramp. Fix it up here. */
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c->loc[IA64_REG_IP] = IA64_LOC_ADDR (c->sigcontext_addr
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+ LINUX_SC_IP_OFF, 0);
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c->cfm_loc = IA64_LOC_ADDR (c->sigcontext_addr
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+ LINUX_SC_CFM_OFF, 0);
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/* update the IP cache: */
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if ((ret = ia64_get (c, c->loc[IA64_REG_IP], &ip)) < 0)
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return ret;
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c->ip = ip;
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if (ip == 0)
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/* end of frame-chain reached */
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return 0;
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/* update the CFM cache: */
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if ((ret = ia64_get (c, c->cfm_loc, &c->cfm)) < 0)
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return ret;
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}
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/* do what can't be described by unwind directives: */
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c->loc[IA64_REG_PFS] = IA64_LOC_ADDR (c->sigcontext_addr
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+ LINUX_SC_AR_PFS_OFF, 0);
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break;
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#endif
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#if !defined(UNW_LOCAL_ONLY) || defined(__hpux)
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case ABI_MARKER_HP_UX_SIGTRAMP:
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{
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ia64_loc_t sc_loc;
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/* HP-UX passes the address of ucontext_t in r32: */
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if ((ret = ia64_get_stacked (c, 32, &sc_loc, NULL)) < 0)
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return ret;
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c->sigcontext_addr = IA64_GET_ADDR (sc_loc);
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}
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c->as->abi = ABI_HPUX;
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if ((ret = hpux_sigtramp (c, &num_regs)) < 0)
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return ret;
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break;
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#endif
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default:
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debug (1, "%s: unknown ABI marker: ABI=%u, context=%u\n",
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@ -173,7 +244,14 @@ update_frame_state (struct cursor *c)
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__FUNCTION__, c->sigcontext_addr, ret);
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c->sigcontext_off = c->sigcontext_addr - c->sp;
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num_regs = c->cfm & 0x7f; /* size of frame */
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/* update the IP cache: */
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if ((ret = ia64_get (c, c->loc[IA64_REG_IP], &ip)) < 0)
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return ret;
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c->ip = ip;
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if (ip == 0)
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/* end of frame-chain reached */
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return 0;
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}
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else
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num_regs = (c->cfm >> 7) & 0x7f; /* size of locals */
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