diff options
Diffstat (limited to 'src/aarch64/Gstash_frame.c')
| -rw-r--r-- | src/aarch64/Gstash_frame.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/src/aarch64/Gstash_frame.c b/src/aarch64/Gstash_frame.c new file mode 100644 index 00000000..da1ff2cb --- /dev/null +++ b/src/aarch64/Gstash_frame.c @@ -0,0 +1,89 @@ +/* libunwind - a platform-independent unwind library + Copyright (C) 2010, 2011 by FERMI NATIONAL ACCELERATOR LABORATORY + Copyright (C) 2014 CERN and Aalto University + Contributed by Filip Nyback + +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" + +HIDDEN void +tdep_stash_frame (struct dwarf_cursor *d, struct dwarf_reg_state *rs) +{ + struct cursor *c = (struct cursor *) dwarf_to_cursor (d); + unw_tdep_frame_t *f = &c->frame_info; + + Debug (4, "ip=0x%lx cfa=0x%lx type %d cfa [where=%d val=%ld] cfaoff=%ld" + " ra=0x%lx fp [where=%d val=%ld @0x%lx] lr [where=%d val=%ld @0x%lx] " + "sp [where=%d val=%ld @0x%lx]\n", + d->ip, d->cfa, f->frame_type, + rs->reg[DWARF_CFA_REG_COLUMN].where, + rs->reg[DWARF_CFA_REG_COLUMN].val, + rs->reg[DWARF_CFA_OFF_COLUMN].val, + DWARF_GET_LOC(d->loc[d->ret_addr_column]), + rs->reg[FP].where, rs->reg[FP].val, DWARF_GET_LOC(d->loc[FP]), + rs->reg[LR].where, rs->reg[LR].val, DWARF_GET_LOC(d->loc[LR]), + rs->reg[SP].where, rs->reg[SP].val, DWARF_GET_LOC(d->loc[SP])); + + /* A standard frame is defined as: + - CFA is register-relative offset off FP or SP; + - Return address is saved in LR; + - FP is unsaved or saved at CFA+offset, offset != -1; + - LR is unsaved or saved at CFA+offset, offset != -1; + - SP is unsaved or saved at CFA+offset, offset != -1. */ + if (f->frame_type == UNW_AARCH64_FRAME_OTHER + && (rs->reg[DWARF_CFA_REG_COLUMN].where == DWARF_WHERE_REG) + && (rs->reg[DWARF_CFA_REG_COLUMN].val == FP + || rs->reg[DWARF_CFA_REG_COLUMN].val == SP) + && labs(rs->reg[DWARF_CFA_OFF_COLUMN].val) < (1 << 29) + && d->ret_addr_column == LR + && (rs->reg[FP].where == DWARF_WHERE_UNDEF + || rs->reg[FP].where == DWARF_WHERE_SAME + || (rs->reg[FP].where == DWARF_WHERE_CFAREL + && labs(rs->reg[FP].val) < (1 << 29) + && rs->reg[FP].val+1 != 0)) + && (rs->reg[LR].where == DWARF_WHERE_UNDEF + || rs->reg[LR].where == DWARF_WHERE_SAME + || (rs->reg[LR].where == DWARF_WHERE_CFAREL + && labs(rs->reg[LR].val) < (1 << 29) + && rs->reg[LR].val+1 != 0)) + && (rs->reg[SP].where == DWARF_WHERE_UNDEF + || rs->reg[SP].where == DWARF_WHERE_SAME + || (rs->reg[SP].where == DWARF_WHERE_CFAREL + && labs(rs->reg[SP].val) < (1 << 29) + && rs->reg[SP].val+1 != 0))) + { + /* Save information for a standard frame. */ + f->frame_type = UNW_AARCH64_FRAME_STANDARD; + f->cfa_reg_sp = (rs->reg[DWARF_CFA_REG_COLUMN].val == SP); + f->cfa_reg_offset = rs->reg[DWARF_CFA_OFF_COLUMN].val; + if (rs->reg[FP].where == DWARF_WHERE_CFAREL) + f->fp_cfa_offset = rs->reg[FP].val; + if (rs->reg[LR].where == DWARF_WHERE_CFAREL) + f->lr_cfa_offset = rs->reg[LR].val; + if (rs->reg[SP].where == DWARF_WHERE_CFAREL) + f->sp_cfa_offset = rs->reg[SP].val; + Debug (4, " standard frame\n"); + } + else + Debug (4, " unusual frame\n"); +} |