mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-06-28 12:11:45 +02:00
(uc_addr): New function to translate a register number into a ucontext address.
(_U_ia64_uc_addr): New function. (access_reg): Use uc_addr() to calculate ucontext address. Use uc->sc_rbs_base when accessing ar.bsp or ar.bspstore (see comments for unw_init_local()). (access_fpreg): Ditto. (ia64_local_resume): Renamed from resume(). Read NaT bits via ia64_access_reg(). Call abort() instead of fprintf() when encountering a signal trampoline. (unw_init_local): Initialize uc->sc_rbs_base to the bsp value of the current function. For UNW_LOCAL_ONLY case, just initialize c->uc and then call common_init() to do the remaining initialization. For the general case, just initialize the accessor and then also call common_init(). (Logical change 1.8)
This commit is contained in:
mostang.com!davidm
parent
5e34685f18
commit
503d83fa69
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@ -22,7 +22,9 @@ executable file might be covered by the GNU General Public
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License. */
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#include <string.h>
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#include <stdlib.h>
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#include "init.h"
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#include "rse.h"
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#include "unwind_i.h"
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@ -36,7 +38,52 @@ unw_init_local (unw_cursor_t *cursor, ucontext_t *uc)
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#else /* !UNW_REMOTE_ONLY */
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#ifndef UNW_LOCAL_ONLY
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static inline void *
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uc_addr (ucontext_t *uc, int reg)
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{
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void *addr;
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switch (reg)
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{
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case UNW_IA64_IP: addr = &uc->uc_mcontext.sc_br[0]; break;
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case UNW_IA64_SP: addr = &uc->uc_mcontext.sc_gr[12]; break;
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case UNW_IA64_CFM: addr = &uc->uc_mcontext.sc_ar_pfs; break;
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case UNW_IA64_AR_RNAT: addr = &uc->uc_mcontext.sc_ar_rnat; break;
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case UNW_IA64_AR_UNAT: addr = &uc->uc_mcontext.sc_ar_unat; break;
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case UNW_IA64_AR_LC: addr = &uc->uc_mcontext.sc_ar_lc; break;
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case UNW_IA64_AR_FPSR: addr = &uc->uc_mcontext.sc_ar_fpsr; break;
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case UNW_IA64_PR: addr = &uc->uc_mcontext.sc_pr; break;
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case UNW_IA64_AR_BSP: addr = &uc->uc_mcontext.sc_rbs_base; break;
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case UNW_IA64_AR_BSPSTORE: addr = &uc->uc_mcontext.sc_rbs_base; break;
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case UNW_IA64_GR + 4 ... UNW_IA64_GR + 7:
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addr = &uc->uc_mcontext.sc_gr[reg - UNW_IA64_GR];
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break;
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case UNW_IA64_BR + 1 ... UNW_IA64_BR + 5:
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addr = &uc->uc_mcontext.sc_br[reg - UNW_IA64_BR];
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break;
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case UNW_IA64_FR+ 2 ... UNW_IA64_FR+ 5:
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case UNW_IA64_FR+16 ... UNW_IA64_FR+31:
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addr = &uc->uc_mcontext.sc_fr[reg - UNW_IA64_FR];
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break;
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default:
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addr = NULL;
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}
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return addr;
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}
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#ifdef UNW_LOCAL_ONLY
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void *
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_U_ia64_uc_addr (ucontext_t *uc, int reg)
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{
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return uc_addr (uc, reg);
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}
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#else /* !UNW_LOCAL_ONLY */
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static int
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access_mem (unw_word_t addr, unw_word_t *val, int write, void *arg)
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@ -57,47 +104,14 @@ access_mem (unw_word_t addr, unw_word_t *val, int write, void *arg)
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static int
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access_reg (unw_regnum_t reg, unw_word_t *val, int write, void *arg)
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{
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unw_word_t *addr, mask;
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ucontext_t *uc = arg;
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unw_word_t *addr, mask, sol;
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switch (reg)
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if (reg >= UNW_IA64_FR && reg < UNW_IA64_FR + 128)
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goto badreg;
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if (reg >= UNW_IA64_NAT + 4 && reg <= UNW_IA64_NAT + 7)
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{
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case UNW_IA64_IP: addr = &uc->uc_mcontext.sc_br[0]; break;
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case UNW_IA64_SP: addr = &uc->uc_mcontext.sc_gr[12]; break;
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case UNW_IA64_CFM: addr = &uc->uc_mcontext.sc_ar_pfs; break;
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case UNW_IA64_AR_RNAT: addr = &uc->uc_mcontext.sc_ar_rnat; break;
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case UNW_IA64_AR_UNAT: addr = &uc->uc_mcontext.sc_ar_unat; break;
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case UNW_IA64_AR_LC: addr = &uc->uc_mcontext.sc_ar_lc; break;
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case UNW_IA64_AR_FPSR: addr = &uc->uc_mcontext.sc_ar_fpsr; break;
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case UNW_IA64_PR: addr = &uc->uc_mcontext.sc_pr; break;
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case UNW_IA64_AR_BSP:
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case UNW_IA64_AR_BSPSTORE:
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/* bsp and bspstore are equal after a flushrs. Account for the
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fact that sc_ar_bsp points to *end* of register frame of the
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initial call frame. */
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if (write)
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{
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sol = (uc->uc_mcontext.sc_ar_pfs >> 7) & 0x7f;
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uc->uc_mcontext.sc_ar_bsp = ia64_rse_skip_regs (*val, sol);
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debug (100, "%s: %s <- %lx\n",
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__FUNCTION__, _U_ia64_regname (reg), *val);
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}
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else
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{
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sol = (uc->uc_mcontext.sc_ar_pfs >> 7) & 0x7f;
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*val = ia64_rse_skip_regs (uc->uc_mcontext.sc_ar_bsp, -sol);
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debug (100, "%s: %s -> %lx\n",
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__FUNCTION__, _U_ia64_regname (reg), *val);
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}
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return 0;
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case UNW_IA64_GR + 4 ... UNW_IA64_GR + 7:
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addr = &uc->uc_mcontext.sc_gr[reg - UNW_IA64_GR];
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break;
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case UNW_IA64_NAT + 4 ... UNW_IA64_NAT + 7:
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mask = ((unw_word_t) 1) << (reg - UNW_IA64_NAT);
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if (write)
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{
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@ -116,17 +130,12 @@ access_reg (unw_regnum_t reg, unw_word_t *val, int write, void *arg)
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debug (100, "%s: %s -> %lx\n", __FUNCTION__, _U_ia64_regname (reg),
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*val);
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return 0;
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case UNW_IA64_BR + 1 ... UNW_IA64_BR + 5:
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addr = &uc->uc_mcontext.sc_br[reg - UNW_IA64_BR];
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break;
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default:
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debug (1, "%s: bad register number %u\n", __FUNCTION__, reg);
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/* attempt to access a non-preserved register */
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return -UNW_EBADREG;
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}
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addr = uc_addr (uc, reg);
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if (!addr)
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goto badreg;
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if (write)
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{
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*(unw_word_t *) addr = *val;
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@ -140,6 +149,10 @@ access_reg (unw_regnum_t reg, unw_word_t *val, int write, void *arg)
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__FUNCTION__, _U_ia64_regname (reg), *val);
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}
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return 0;
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badreg:
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debug (1, "%s: bad register number %u\n", __FUNCTION__, reg);
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return -UNW_EBADREG;
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}
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static int
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@ -148,17 +161,12 @@ access_fpreg (unw_regnum_t reg, unw_fpreg_t *val, int write, void *arg)
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ucontext_t *uc = arg;
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unw_fpreg_t *addr;
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switch (reg)
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{
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case UNW_IA64_FR+ 2 ... UNW_IA64_FR+ 5:
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case UNW_IA64_FR+16 ... UNW_IA64_FR+31:
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addr = (unw_fpreg_t *) &uc->uc_mcontext.sc_fr[reg - UNW_IA64_FR]; break;
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if (reg < UNW_IA64_FR || reg >= UNW_IA64_FR + 128)
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goto badreg;
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default:
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debug (1, "%s: bad register number %u\n", __FUNCTION__, reg);
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/* attempt to access a non-preserved register */
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return -UNW_EBADREG;
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}
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addr = uc_addr (uc, reg);
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if (!addr)
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goto badreg;
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if (write)
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{
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@ -173,25 +181,32 @@ access_fpreg (unw_regnum_t reg, unw_fpreg_t *val, int write, void *arg)
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_U_ia64_regname (reg), val->raw.bits[1], val->raw.bits[0]);
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}
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return 0;
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badreg:
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debug (1, "%s: bad register number %u\n", __FUNCTION__, reg);
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/* attempt to access a non-preserved register */
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return -UNW_EBADREG;
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}
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static int
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resume (unw_cursor_t *cursor, void *arg)
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#endif /* !UNW_LOCAL_ONLY */
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int
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ia64_local_resume (unw_cursor_t *cursor, void *arg)
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{
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struct ia64_cursor *c = (struct ia64_cursor *) cursor;
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unw_fpreg_t fpval;
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ucontext_t *uc = arg;
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unw_word_t val, sol;
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int i, ret;
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# define SET_NAT(n, r) \
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do \
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{ \
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ret = ia64_get (c, c->r, &val); \
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if (ret < 0) \
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return ret; \
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if (val) \
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uc->uc_mcontext.sc_nat |= (unw_word_t) 1 << n; \
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} \
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# define SET_NAT(n) \
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do \
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{ \
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ret = ia64_access_reg (c, UNW_IA64_NAT + (n), &val, 0); \
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if (ret < 0) \
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return ret; \
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if (val) \
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uc->uc_mcontext.sc_nat |= (unw_word_t) 1 << n; \
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} \
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while (0)
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# define SET_REG(f, r) \
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do \
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@ -223,8 +238,8 @@ resume (unw_cursor_t *cursor, void *arg)
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SET_REG (sc_gr[4], r4_loc); SET_REG(sc_gr[5], r5_loc);
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SET_REG (sc_gr[6], r6_loc); SET_REG(sc_gr[7], r7_loc);
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uc->uc_mcontext.sc_nat = 0;
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SET_NAT (4, nat4_loc); SET_NAT(5, nat5_loc);
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SET_NAT (6, nat6_loc); SET_NAT(7, nat7_loc);
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SET_NAT (4); SET_NAT(5);
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SET_NAT (6); SET_NAT(7);
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SET_REG (sc_br[1], b1_loc);
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SET_REG (sc_br[2], b2_loc);
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@ -239,7 +254,7 @@ resume (unw_cursor_t *cursor, void *arg)
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SET_FPREG (sc_fr[i], fr_loc[i - 16]);
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if ((c->pi.flags & IA64_FLAG_SIGTRAMP) != 0)
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fprintf (stderr, "%s: fix me!!\n", __FUNCTION__);
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abort (); /* XXX this needs to be fixed... */
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/* Account for the fact that __ia64_install_context() returns via
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br.ret, which will decrement bsp by size-of-locals. */
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@ -254,14 +269,14 @@ resume (unw_cursor_t *cursor, void *arg)
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c->eh_args[3]);
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}
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#endif /* !UNW_LOCAL_ONLY */
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int
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unw_init_local (unw_cursor_t *cursor, ucontext_t *uc)
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{
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struct ia64_cursor *c = (struct ia64_cursor *) cursor;
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unw_word_t sol;
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int ret;
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STAT(unsigned long start, flags; ++unw.stat.api.inits;
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start = ia64_get_itc ();)
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int ret;
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if (unw.first_time)
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{
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@ -269,42 +284,26 @@ unw_init_local (unw_cursor_t *cursor, ucontext_t *uc)
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ia64_init ();
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}
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/* The bsp value stored by getcontext() points to the *end* of the
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register frame of the initial function. We correct for this by
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storing the adjusted value in sc_rbs_base, which isn't used by
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getcontext()/setcontext(). */
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sol = (uc->uc_mcontext.sc_ar_pfs >> 7) & 0x7f;
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uc->uc_mcontext.sc_rbs_base = ia64_rse_skip_regs (uc->uc_mcontext.sc_ar_bsp,
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-sol);
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#ifdef UNW_LOCAL_ONLY
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{
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struct ia64_cursor *c = (struct ia64_cursor *) cursor;
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unw_word_t bsp, sol;
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# error this needs updating/testing
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c->uc = uc;
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/* What we do here is initialize the unwind cursor so unwinding
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starts at parent of the function that created the ucontext_t. */
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c->sp = c->psp = uc->uc_mcontext.sc_gr[12];
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c->cfm_loc = &uc->uc_mcontext.sc_ar_pfs;
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bsp = uc->uc_mcontext.sc_ar_bsp;
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sol = (*c->cfm_loc >> 7) & 0x7f;
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c->bsp = ia64_rse_skip_regs (bsp, -sol);
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c->ip = uc->uc_mcontext.sc_br[0];
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c->pr = uc->uc_mcontext.sc_pr;
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ret = ia64_find_save_locs (c);
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}
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c->uc = uc;
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#else /* !UNW_LOCAL_ONLY */
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{
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unw_accessors_t a;
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a.arg = uc;
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a.acquire_unwind_info = ia64_glibc_acquire_unwind_info;
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a.release_unwind_info = ia64_glibc_release_unwind_info;
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a.access_mem = access_mem;
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a.access_reg = access_reg;
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a.access_fpreg = access_fpreg;
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a.resume = resume;
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ret = unw_init_remote (cursor, &a);
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}
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c->acc.arg = uc;
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c->acc.acquire_unwind_info = _U_ia64_glibc_acquire_unwind_info;
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c->acc.release_unwind_info = _U_ia64_glibc_release_unwind_info;
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c->acc.access_mem = access_mem;
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c->acc.access_reg = access_reg;
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c->acc.access_fpreg = access_fpreg;
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c->acc.resume = ia64_local_resume;
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#endif /* !UNW_LOCAL_ONLY */
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ret = common_init (c);
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STAT(unw.stat.api.init_time += ia64_get_itc() - start;)
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return ret;
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}
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