diff options
Diffstat (limited to 'src/aarch64/Gstep.c')
| -rw-r--r-- | src/aarch64/Gstep.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/src/aarch64/Gstep.c b/src/aarch64/Gstep.c new file mode 100644 index 00000000..4aa15d1b --- /dev/null +++ b/src/aarch64/Gstep.c @@ -0,0 +1,129 @@ +/* libunwind - a platform-independent unwind library + Copyright (C) 2008 CodeSourcery + Copyright (C) 2011-2013 Linaro Limited + Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.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 "unwind_i.h" +#include "offsets.h" + +PROTECTED int +unw_handle_signal_frame (unw_cursor_t *cursor) +{ + struct cursor *c = (struct cursor *) cursor; + int ret; + unw_word_t sc_addr, sp, sp_addr = c->dwarf.cfa; + struct dwarf_loc sp_loc = DWARF_LOC (sp_addr, 0); + + if ((ret = dwarf_get (&c->dwarf, sp_loc, &sp)) < 0) + return -UNW_EUNSPEC; + + ret = unw_is_signal_frame (cursor); + Debug(1, "unw_is_signal_frame()=%d\n", ret); + + /* Save the SP and PC to be able to return execution at this point + later in time (unw_resume). */ + c->sigcontext_sp = c->dwarf.cfa; + c->sigcontext_pc = c->dwarf.ip; + + if (ret) + { + c->sigcontext_format = AARCH64_SCF_LINUX_RT_SIGFRAME; + sc_addr = sp_addr + sizeof (siginfo_t) + LINUX_UC_MCONTEXT_OFF; + } + else + return -UNW_EUNSPEC; + + c->sigcontext_addr = sc_addr; + + /* Update the dwarf cursor. + Set the location of the registers to the corresponding addresses of the + uc_mcontext / sigcontext structure contents. */ + c->dwarf.loc[UNW_AARCH64_X0] = DWARF_LOC (sc_addr + LINUX_SC_X0_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X1] = DWARF_LOC (sc_addr + LINUX_SC_X1_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X2] = DWARF_LOC (sc_addr + LINUX_SC_X2_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X3] = DWARF_LOC (sc_addr + LINUX_SC_X3_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X4] = DWARF_LOC (sc_addr + LINUX_SC_X4_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X5] = DWARF_LOC (sc_addr + LINUX_SC_X5_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X6] = DWARF_LOC (sc_addr + LINUX_SC_X6_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X7] = DWARF_LOC (sc_addr + LINUX_SC_X7_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X8] = DWARF_LOC (sc_addr + LINUX_SC_X8_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X9] = DWARF_LOC (sc_addr + LINUX_SC_X9_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X10] = DWARF_LOC (sc_addr + LINUX_SC_X10_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X11] = DWARF_LOC (sc_addr + LINUX_SC_X11_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X12] = DWARF_LOC (sc_addr + LINUX_SC_X12_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X13] = DWARF_LOC (sc_addr + LINUX_SC_X13_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X14] = DWARF_LOC (sc_addr + LINUX_SC_X14_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X15] = DWARF_LOC (sc_addr + LINUX_SC_X15_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X16] = DWARF_LOC (sc_addr + LINUX_SC_X16_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X17] = DWARF_LOC (sc_addr + LINUX_SC_X17_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X18] = DWARF_LOC (sc_addr + LINUX_SC_X18_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X19] = DWARF_LOC (sc_addr + LINUX_SC_X19_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X20] = DWARF_LOC (sc_addr + LINUX_SC_X20_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X21] = DWARF_LOC (sc_addr + LINUX_SC_X21_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X22] = DWARF_LOC (sc_addr + LINUX_SC_X22_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X23] = DWARF_LOC (sc_addr + LINUX_SC_X23_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X24] = DWARF_LOC (sc_addr + LINUX_SC_X24_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X25] = DWARF_LOC (sc_addr + LINUX_SC_X25_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X26] = DWARF_LOC (sc_addr + LINUX_SC_X26_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X27] = DWARF_LOC (sc_addr + LINUX_SC_X27_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X28] = DWARF_LOC (sc_addr + LINUX_SC_X28_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X29] = DWARF_LOC (sc_addr + LINUX_SC_X29_OFF, 0); + c->dwarf.loc[UNW_AARCH64_X30] = DWARF_LOC (sc_addr + LINUX_SC_X30_OFF, 0); + c->dwarf.loc[UNW_AARCH64_SP] = DWARF_LOC (sc_addr + LINUX_SC_SP_OFF, 0); + c->dwarf.loc[UNW_AARCH64_PC] = DWARF_LOC (sc_addr + LINUX_SC_PC_OFF, 0); + c->dwarf.loc[UNW_AARCH64_PSTATE] = DWARF_LOC (sc_addr + LINUX_SC_PSTATE_OFF, 0); + + /* Set SP/CFA and PC/IP. */ + dwarf_get (&c->dwarf, c->dwarf.loc[UNW_AARCH64_SP], &c->dwarf.cfa); + dwarf_get (&c->dwarf, c->dwarf.loc[UNW_AARCH64_PC], &c->dwarf.ip); + + c->dwarf.pi_valid = 0; + + return 1; +} + +PROTECTED int +unw_step (unw_cursor_t *cursor) +{ + struct cursor *c = (struct cursor *) cursor; + int ret; + + Debug (1, "(cursor=%p, ip=0x%016lx, cfa=0x%016lx))\n", + c, c->dwarf.ip, c->dwarf.cfa); + + /* Check if this is a signal frame. */ + if (unw_is_signal_frame (cursor)) + return unw_handle_signal_frame (cursor); + + ret = dwarf_step (&c->dwarf); + Debug(1, "dwarf_step()=%d\n", ret); + + if (unlikely (ret == -UNW_ESTOPUNWIND)) + return ret; + + if (unlikely (ret < 0)) + return 0; + + return (c->dwarf.ip == 0) ? 0 : 1; +} |