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790be1e40d
"make check" passed. ====================================================== All 34 tests behaved as expected (2 expected failures) ====================================================== Zhi-Gang Liu @ Tilera
115 lines
3.4 KiB
C
115 lines
3.4 KiB
C
/* libunwind - a platform-independent unwind library
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Copyright (C) 2008 CodeSourcery
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Copyright (C) 2014 Tilera Corp.
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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 "unwind_i.h"
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#include <stdio.h>
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#include "offsets.h"
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#ifdef __linux__
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#include <sys/syscall.h>
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#include <arch/abi.h>
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#else
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# error "Only support Linux!"
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#endif
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#define MOVELI_R10_RT_SIGRETURN \
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( 0x000007e051483000ULL | \
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((unsigned long)__NR_rt_sigreturn << 43) | \
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((unsigned long)TREG_SYSCALL_NR << 31) )
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#define SWINT1 0x286b180051485000ULL
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PROTECTED int
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unw_is_signal_frame (unw_cursor_t *cursor)
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{
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struct cursor *c = (struct cursor*) cursor;
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unw_word_t w0, w1, ip;
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unw_addr_space_t as;
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unw_accessors_t *a;
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void *arg;
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int ret;
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as = c->dwarf.as;
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a = unw_get_accessors (as);
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arg = c->dwarf.as_arg;
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ip = c->dwarf.ip;
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if (!ip || !a->access_mem || (ip & (sizeof(unw_word_t) - 1)))
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return 0;
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if ((ret = (*a->access_mem) (as, ip, &w0, 0, arg)) < 0)
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return ret;
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if ((ret = (*a->access_mem) (as, ip + 8, &w1, 0, arg)) < 0)
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return ret;
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/* Return 1 if the IP points to a RT sigreturn sequence. */
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if (w0 == MOVELI_R10_RT_SIGRETURN &&
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w1 == SWINT1)
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{
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return 1;
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}
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return 0;
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}
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PROTECTED int
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unw_handle_signal_frame (unw_cursor_t *cursor)
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{
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int i;
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struct cursor *c = (struct cursor *) cursor;
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unw_word_t sc_addr, sp, sp_addr = c->dwarf.cfa;
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struct dwarf_loc sp_loc = DWARF_LOC (sp_addr, 0);
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int ret;
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if ((ret = dwarf_get (&c->dwarf, sp_loc, &sp)) < 0)
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return -UNW_EUNSPEC;
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/* Save the SP and PC to be able to return execution at this point
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later in time (unw_resume). */
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c->sigcontext_sp = c->dwarf.cfa;
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c->sigcontext_pc = c->dwarf.ip;
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c->sigcontext_addr = sp_addr + sizeof (siginfo_t) +
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C_ABI_SAVE_AREA_SIZE;
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sc_addr = c->sigcontext_addr + LINUX_UC_MCONTEXT_OFF;
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/* Update the dwarf cursor.
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Set the location of the registers to the corresponding addresses of the
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uc_mcontext / sigcontext structure contents. */
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#define SC_REG_OFFSET(X) (8 * X)
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for (i = UNW_TILEGX_R0; i <= UNW_TILEGX_R55; i++)
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{
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c->dwarf.loc[i] = DWARF_LOC (sc_addr + SC_REG_OFFSET(i), 0);
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}
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/* Set SP/CFA and PC/IP. */
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dwarf_get (&c->dwarf, c->dwarf.loc[UNW_TILEGX_R54], &c->dwarf.cfa);
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dwarf_get (&c->dwarf, c->dwarf.loc[UNW_TILEGX_R55], &c->dwarf.ip);
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return 1;
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}
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