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Rename: src/dwarf/Gstep-dwarf.c -> src/dwarf/Gstep.c
}(Logical change 1.241)
This commit is contained in:
homeip.net!davidm
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1 changed files with 0 additions and 135 deletions
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/* libunwind - a platform-independent unwind library
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Copyright (c) 2003 Hewlett-Packard Development Company, L.P.
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Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
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This file is part of libunwind.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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#include "dwarf.h"
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#include "tdep.h"
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static int
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update_frame_state (struct dwarf_cursor *c)
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{
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unw_word_t prev_ip, prev_cfa, ip;
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int ret;
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prev_ip = c->ip;
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prev_cfa = c->cfa;
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/* Update the IP cache (do this first: if we reach the end of the
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frame-chain, the rest of the info may not be valid/useful
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anymore. */
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ret = dwarf_get (c, c->loc[c->ret_addr_column], &ip);
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if (ret < 0)
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return ret;
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c->ip = ip;
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#if 0
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/* ??? fix me---perhaps move to where we have convenient access to
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code_align? */
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if ((ip & (c->code_align - 1)) != 0)
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{
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/* don't let obviously bad addresses pollute the cache */
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Debug (1, "rejecting bad ip=0x%lx\n", (long) c->ip);
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return -UNW_EINVALIDIP;
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}
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#endif
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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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#if 0
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num_regs = 0;
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if (unlikely (c->abi_marker))
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{
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c->last_abi_marker = c->abi_marker;
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switch (c->abi_marker)
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{
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case ABI_MARKER_LINUX_SIGTRAMP:
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case ABI_MARKER_OLD_LINUX_SIGTRAMP:
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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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break;
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case ABI_MARKER_OLD_LINUX_INTERRUPT:
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case ABI_MARKER_LINUX_INTERRUPT:
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c->as->abi = ABI_LINUX;
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if ((ret = linux_interrupt (c, &num_regs, c->abi_marker)) < 0)
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return ret;
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break;
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case ABI_MARKER_HP_UX_SIGTRAMP:
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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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default:
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Debug (1, "unknown ABI marker: ABI=%u, context=%u\n",
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c->abi_marker >> 8, c->abi_marker & 0xff);
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return -UNW_EINVAL;
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}
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Debug (10, "sigcontext_addr=%lx (ret=%d)\n",
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(unsigned long) c->sigcontext_addr, ret);
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c->sigcontext_off = c->sigcontext_addr - c->cfa;
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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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c->abi_marker = 0;
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#endif
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if (c->ip == prev_ip && c->cfa == prev_cfa)
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{
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dprintf ("%s: ip and cfa unchanged; stopping here (ip=0x%lx)\n",
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__FUNCTION__, (long) ip);
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return -UNW_EBADFRAME;
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}
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c->pi_valid = 0;
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return 0;
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}
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HIDDEN int
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dwarf_step (struct dwarf_cursor *c)
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{
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int ret;
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if ((ret = dwarf_find_save_locs (c)) < 0)
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return ret;
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if ((ret = update_frame_state (c)) < 0)
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return ret;
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Debug (16, "done\n");
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return (c->ip == 0) ? 0 : 1;
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}
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