| /* 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" |
| |
| #ifndef UNW_REMOTE_ONLY |
| |
| HIDDEN inline int |
| aarch64_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg) |
| { |
| #ifdef __linux__ |
| struct cursor *c = (struct cursor *) cursor; |
| unw_tdep_context_t *uc = c->dwarf.as_arg; |
| |
| if (c->sigcontext_format == AARCH64_SCF_NONE) |
| { |
| /* Since there are no signals involved here we restore the non scratch |
| registers only. */ |
| unsigned long regs[11]; |
| regs[0] = uc->uc_mcontext.regs[19]; |
| regs[1] = uc->uc_mcontext.regs[20]; |
| regs[2] = uc->uc_mcontext.regs[21]; |
| regs[3] = uc->uc_mcontext.regs[22]; |
| regs[4] = uc->uc_mcontext.regs[23]; |
| regs[5] = uc->uc_mcontext.regs[24]; |
| regs[6] = uc->uc_mcontext.regs[25]; |
| regs[7] = uc->uc_mcontext.regs[26]; |
| regs[8] = uc->uc_mcontext.regs[27]; |
| regs[9] = uc->uc_mcontext.regs[28]; |
| regs[10] = uc->uc_mcontext.regs[30]; /* LR */ |
| unsigned long sp = uc->uc_mcontext.sp; |
| |
| struct regs_overlay { |
| char x[sizeof(regs)]; |
| }; |
| |
| asm volatile ( |
| "ldp x19, x20, [%0]\n" |
| "ldp x21, x22, [%0,16]\n" |
| "ldp x23, x24, [%0,32]\n" |
| "ldp x25, x26, [%0,48]\n" |
| "ldp x27, x28, [%0,64]\n" |
| "ldr x30, [%0,80]\n" |
| "mov sp, %1\n" |
| "ret \n" |
| : |
| : "r" (regs), |
| "r" (sp), |
| "m" (*(struct regs_overlay *)regs) |
| ); |
| } |
| else |
| { |
| struct sigcontext *sc = (struct sigcontext *) c->sigcontext_addr; |
| |
| if (c->dwarf.eh_valid_mask & 0x1) sc->regs[0] = c->dwarf.eh_args[0]; |
| if (c->dwarf.eh_valid_mask & 0x2) sc->regs[1] = c->dwarf.eh_args[1]; |
| if (c->dwarf.eh_valid_mask & 0x4) sc->regs[2] = c->dwarf.eh_args[2]; |
| if (c->dwarf.eh_valid_mask & 0x8) sc->regs[3] = c->dwarf.eh_args[3]; |
| |
| sc->regs[4] = uc->uc_mcontext.regs[4]; |
| sc->regs[5] = uc->uc_mcontext.regs[5]; |
| sc->regs[6] = uc->uc_mcontext.regs[6]; |
| sc->regs[7] = uc->uc_mcontext.regs[7]; |
| sc->regs[8] = uc->uc_mcontext.regs[8]; |
| sc->regs[9] = uc->uc_mcontext.regs[9]; |
| sc->regs[10] = uc->uc_mcontext.regs[10]; |
| sc->regs[11] = uc->uc_mcontext.regs[11]; |
| sc->regs[12] = uc->uc_mcontext.regs[12]; |
| sc->regs[13] = uc->uc_mcontext.regs[13]; |
| sc->regs[14] = uc->uc_mcontext.regs[14]; |
| sc->regs[15] = uc->uc_mcontext.regs[15]; |
| sc->regs[16] = uc->uc_mcontext.regs[16]; |
| sc->regs[17] = uc->uc_mcontext.regs[17]; |
| sc->regs[18] = uc->uc_mcontext.regs[18]; |
| sc->regs[19] = uc->uc_mcontext.regs[19]; |
| sc->regs[20] = uc->uc_mcontext.regs[20]; |
| sc->regs[21] = uc->uc_mcontext.regs[21]; |
| sc->regs[22] = uc->uc_mcontext.regs[22]; |
| sc->regs[23] = uc->uc_mcontext.regs[23]; |
| sc->regs[24] = uc->uc_mcontext.regs[24]; |
| sc->regs[25] = uc->uc_mcontext.regs[25]; |
| sc->regs[26] = uc->uc_mcontext.regs[26]; |
| sc->regs[27] = uc->uc_mcontext.regs[27]; |
| sc->regs[28] = uc->uc_mcontext.regs[28]; |
| sc->regs[29] = uc->uc_mcontext.regs[29]; |
| sc->regs[30] = uc->uc_mcontext.regs[30]; |
| sc->sp = uc->uc_mcontext.sp; |
| sc->pc = uc->uc_mcontext.pc; |
| sc->pstate = uc->uc_mcontext.pstate; |
| |
| asm volatile ( |
| "mov sp, %0\n" |
| "ret %1\n" |
| : : "r" (c->sigcontext_sp), "r" (c->sigcontext_pc) |
| ); |
| } |
| unreachable(); |
| #else |
| printf ("%s: implement me\n", __FUNCTION__); |
| #endif |
| return -UNW_EINVAL; |
| } |
| |
| #endif /* !UNW_REMOTE_ONLY */ |
| |
| static inline void |
| establish_machine_state (struct cursor *c) |
| { |
| unw_addr_space_t as = c->dwarf.as; |
| void *arg = c->dwarf.as_arg; |
| unw_fpreg_t fpval; |
| unw_word_t val; |
| int reg; |
| |
| Debug (8, "copying out cursor state\n"); |
| |
| for (reg = 0; reg <= UNW_AARCH64_PSTATE; ++reg) |
| { |
| Debug (16, "copying %s %d\n", unw_regname (reg), reg); |
| if (unw_is_fpreg (reg)) |
| { |
| if (tdep_access_fpreg (c, reg, &fpval, 0) >= 0) |
| as->acc.access_fpreg (as, reg, &fpval, 1, arg); |
| } |
| else |
| { |
| if (tdep_access_reg (c, reg, &val, 0) >= 0) |
| as->acc.access_reg (as, reg, &val, 1, arg); |
| } |
| } |
| } |
| |
| PROTECTED int |
| unw_resume (unw_cursor_t *cursor) |
| { |
| struct cursor *c = (struct cursor *) cursor; |
| |
| Debug (1, "(cursor=%p)\n", c); |
| |
| if (!c->dwarf.ip) |
| { |
| /* This can happen easily when the frame-chain gets truncated |
| due to bad or missing unwind-info. */ |
| Debug (1, "refusing to resume execution at address 0\n"); |
| return -UNW_EINVAL; |
| } |
| |
| establish_machine_state (c); |
| |
| return (*c->dwarf.as->acc.resume) (c->dwarf.as, (unw_cursor_t *) c, |
| c->dwarf.as_arg); |
| } |