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3babc1d148
These registers contain the exception pointer and selector.
186 lines
6 KiB
C
186 lines
6 KiB
C
/* libunwind - a platform-independent unwind library
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Copyright (C) 2008 CodeSourcery
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Copyright (C) 2011-2013 Linaro Limited
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Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.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 "unwind_i.h"
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#include "offsets.h"
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#ifndef UNW_REMOTE_ONLY
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HIDDEN inline int
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aarch64_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
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{
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#ifdef __linux__
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struct cursor *c = (struct cursor *) cursor;
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unw_tdep_context_t *uc = c->dwarf.as_arg;
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if (c->sigcontext_format == AARCH64_SCF_NONE)
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{
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/* Since there are no signals involved here we restore EH and non scratch
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registers only. */
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unsigned long regs[15];
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regs[0] = uc->uc_mcontext.regs[0];
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regs[1] = uc->uc_mcontext.regs[1];
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regs[2] = uc->uc_mcontext.regs[2];
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regs[3] = uc->uc_mcontext.regs[3];
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regs[4] = uc->uc_mcontext.regs[19];
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regs[5] = uc->uc_mcontext.regs[20];
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regs[6] = uc->uc_mcontext.regs[21];
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regs[7] = uc->uc_mcontext.regs[22];
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regs[8] = uc->uc_mcontext.regs[23];
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regs[9] = uc->uc_mcontext.regs[24];
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regs[10] = uc->uc_mcontext.regs[25];
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regs[11] = uc->uc_mcontext.regs[26];
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regs[12] = uc->uc_mcontext.regs[27];
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regs[13] = uc->uc_mcontext.regs[28];
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regs[14] = uc->uc_mcontext.regs[30]; /* LR */
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unsigned long sp = uc->uc_mcontext.sp;
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struct regs_overlay {
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char x[sizeof(regs)];
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};
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asm volatile (
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"mov x4, %0\n"
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"mov x5, %1\n"
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"ldp x0, x1, [x4]\n"
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"ldp x2, x3, [x4,16]\n"
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"ldp x19, x20, [x4,32]\n"
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"ldp x21, x22, [x4,48]\n"
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"ldp x23, x24, [x4,64]\n"
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"ldp x25, x26, [x4,80]\n"
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"ldp x27, x28, [x4,96]\n"
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"ldr x30, [x4,112]\n"
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"mov sp, x5\n"
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"ret \n"
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:
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: "r" (regs),
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"r" (sp),
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"m" (*(struct regs_overlay *)regs)
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);
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}
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else
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{
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struct sigcontext *sc = (struct sigcontext *) c->sigcontext_addr;
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if (c->dwarf.eh_valid_mask & 0x1) sc->regs[0] = c->dwarf.eh_args[0];
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if (c->dwarf.eh_valid_mask & 0x2) sc->regs[1] = c->dwarf.eh_args[1];
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if (c->dwarf.eh_valid_mask & 0x4) sc->regs[2] = c->dwarf.eh_args[2];
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if (c->dwarf.eh_valid_mask & 0x8) sc->regs[3] = c->dwarf.eh_args[3];
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sc->regs[4] = uc->uc_mcontext.regs[4];
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sc->regs[5] = uc->uc_mcontext.regs[5];
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sc->regs[6] = uc->uc_mcontext.regs[6];
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sc->regs[7] = uc->uc_mcontext.regs[7];
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sc->regs[8] = uc->uc_mcontext.regs[8];
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sc->regs[9] = uc->uc_mcontext.regs[9];
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sc->regs[10] = uc->uc_mcontext.regs[10];
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sc->regs[11] = uc->uc_mcontext.regs[11];
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sc->regs[12] = uc->uc_mcontext.regs[12];
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sc->regs[13] = uc->uc_mcontext.regs[13];
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sc->regs[14] = uc->uc_mcontext.regs[14];
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sc->regs[15] = uc->uc_mcontext.regs[15];
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sc->regs[16] = uc->uc_mcontext.regs[16];
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sc->regs[17] = uc->uc_mcontext.regs[17];
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sc->regs[18] = uc->uc_mcontext.regs[18];
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sc->regs[19] = uc->uc_mcontext.regs[19];
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sc->regs[20] = uc->uc_mcontext.regs[20];
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sc->regs[21] = uc->uc_mcontext.regs[21];
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sc->regs[22] = uc->uc_mcontext.regs[22];
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sc->regs[23] = uc->uc_mcontext.regs[23];
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sc->regs[24] = uc->uc_mcontext.regs[24];
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sc->regs[25] = uc->uc_mcontext.regs[25];
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sc->regs[26] = uc->uc_mcontext.regs[26];
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sc->regs[27] = uc->uc_mcontext.regs[27];
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sc->regs[28] = uc->uc_mcontext.regs[28];
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sc->regs[29] = uc->uc_mcontext.regs[29];
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sc->regs[30] = uc->uc_mcontext.regs[30];
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sc->sp = uc->uc_mcontext.sp;
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sc->pc = uc->uc_mcontext.pc;
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sc->pstate = uc->uc_mcontext.pstate;
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asm volatile (
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"mov sp, %0\n"
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"ret %1\n"
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: : "r" (c->sigcontext_sp), "r" (c->sigcontext_pc)
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);
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}
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unreachable();
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#else
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printf ("%s: implement me\n", __FUNCTION__);
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#endif
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return -UNW_EINVAL;
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}
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#endif /* !UNW_REMOTE_ONLY */
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static inline void
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establish_machine_state (struct cursor *c)
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{
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unw_addr_space_t as = c->dwarf.as;
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void *arg = c->dwarf.as_arg;
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unw_fpreg_t fpval;
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unw_word_t val;
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int reg;
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Debug (8, "copying out cursor state\n");
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for (reg = 0; reg <= UNW_AARCH64_PSTATE; ++reg)
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{
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Debug (16, "copying %s %d\n", unw_regname (reg), reg);
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if (unw_is_fpreg (reg))
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{
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if (tdep_access_fpreg (c, reg, &fpval, 0) >= 0)
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as->acc.access_fpreg (as, reg, &fpval, 1, arg);
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}
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else
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{
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if (tdep_access_reg (c, reg, &val, 0) >= 0)
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as->acc.access_reg (as, reg, &val, 1, arg);
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}
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}
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}
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PROTECTED int
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unw_resume (unw_cursor_t *cursor)
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{
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struct cursor *c = (struct cursor *) cursor;
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Debug (1, "(cursor=%p)\n", c);
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if (!c->dwarf.ip)
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{
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/* This can happen easily when the frame-chain gets truncated
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due to bad or missing unwind-info. */
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Debug (1, "refusing to resume execution at address 0\n");
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return -UNW_EINVAL;
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}
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establish_machine_state (c);
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return (*c->dwarf.as->acc.resume) (c->dwarf.as, (unw_cursor_t *) c,
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c->dwarf.as_arg);
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}
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