/* libunwind - a platform-independent unwind library Copyright (C) 2003-2005 Hewlett-Packard Co Contributed by David Mosberger-Tang <davidm@hpl.hp.com> Copyright (C) 2010 Konstantin Belousov <kib@freebsd.org> 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 "_UPT_internal.h" #if UNW_TARGET_IA64 # include <elf.h> # ifdef HAVE_ASM_PTRACE_OFFSETS_H # include <asm/ptrace_offsets.h> # endif # include "tdep-ia64/rse.h" #endif #if HAVE_DECL_PTRACE_POKEUSER || HAVE_TTRACE int _UPT_access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val, int write, void *arg) { struct UPT_info *ui = arg; pid_t pid = ui->pid; #if UNW_DEBUG Debug(16, "using pokeuser: reg: %s [%u], val: %lx, write: %d\n", unw_regname(reg), (unsigned) reg, (long) val, write); if (write) Debug (16, "%s <- %lx\n", unw_regname (reg), (long) *val); #endif #if UNW_TARGET_IA64 if ((unsigned) reg - UNW_IA64_NAT < 32) { unsigned long nat_bits, mask; /* The Linux ptrace represents the statc NaT bits as a single word. */ mask = ((unw_word_t) 1) << (reg - UNW_IA64_NAT); errno = 0; #ifdef HAVE_TTRACE # warning No support for ttrace() yet. #else nat_bits = ptrace (PTRACE_PEEKUSER, pid, PT_NAT_BITS, 0); if (errno) goto badreg; #endif if (write) { if (*val) nat_bits |= mask; else nat_bits &= ~mask; #ifdef HAVE_TTRACE # warning No support for ttrace() yet. #else errno = 0; ptrace (PTRACE_POKEUSER, pid, PT_NAT_BITS, nat_bits); if (errno) goto badreg; #endif } goto out; } else switch (reg) { case UNW_IA64_GR + 0: if (write) goto badreg; *val = 0; return 0; case UNW_REG_IP: { unsigned long ip, psr; /* distribute bundle-addr. & slot-number across PT_IIP & PT_IPSR. */ #ifdef HAVE_TTRACE # warning No support for ttrace() yet. #else errno = 0; psr = ptrace (PTRACE_PEEKUSER, pid, PT_CR_IPSR, 0); if (errno) goto badreg; #endif if (write) { ip = *val & ~0xfUL; psr = (psr & ~0x3UL << 41) | (*val & 0x3); #ifdef HAVE_TTRACE # warning No support for ttrace() yet. #else errno = 0; ptrace (PTRACE_POKEUSER, pid, PT_CR_IIP, ip); ptrace (PTRACE_POKEUSER, pid, PT_CR_IPSR, psr); if (errno) goto badreg; #endif } else { #ifdef HAVE_TTRACE # warning No support for ttrace() yet. #else errno = 0; ip = ptrace (PTRACE_PEEKUSER, pid, PT_CR_IIP, 0); if (errno) goto badreg; #endif *val = ip + ((psr >> 41) & 0x3); } goto out; } case UNW_IA64_AR_BSPSTORE: reg = UNW_IA64_AR_BSP; break; case UNW_IA64_AR_BSP: case UNW_IA64_BSP: { unsigned long sof, cfm, bsp; #ifdef HAVE_TTRACE # warning No support for ttrace() yet. #else /* Account for the fact that ptrace() expects bsp to point _after_ the current register frame. */ errno = 0; cfm = ptrace (PTRACE_PEEKUSER, pid, PT_CFM, 0); if (errno) goto badreg; #endif sof = (cfm & 0x7f); if (write) { bsp = rse_skip_regs (*val, sof); #ifdef HAVE_TTRACE # warning No support for ttrace() yet. #else errno = 0; ptrace (PTRACE_POKEUSER, pid, PT_AR_BSP, bsp); if (errno) goto badreg; #endif } else { #ifdef HAVE_TTRACE # warning No support for ttrace() yet. #else errno = 0; bsp = ptrace (PTRACE_PEEKUSER, pid, PT_AR_BSP, 0); if (errno) goto badreg; #endif *val = rse_skip_regs (bsp, -sof); } goto out; } case UNW_IA64_CFM: /* If we change CFM, we need to adjust ptrace's notion of bsp accordingly, so that the real bsp remains unchanged. */ if (write) { unsigned long new_sof, old_sof, cfm, bsp; #ifdef HAVE_TTRACE # warning No support for ttrace() yet. #else errno = 0; bsp = ptrace (PTRACE_PEEKUSER, pid, PT_AR_BSP, 0); cfm = ptrace (PTRACE_PEEKUSER, pid, PT_CFM, 0); #endif if (errno) goto badreg; old_sof = (cfm & 0x7f); new_sof = (*val & 0x7f); if (old_sof != new_sof) { bsp = rse_skip_regs (bsp, -old_sof + new_sof); #ifdef HAVE_TTRACE # warning No support for ttrace() yet. #else errno = 0; ptrace (PTRACE_POKEUSER, pid, PT_AR_BSP, 0); if (errno) goto badreg; #endif } #ifdef HAVE_TTRACE # warning No support for ttrace() yet. #else errno = 0; ptrace (PTRACE_POKEUSER, pid, PT_CFM, *val); if (errno) goto badreg; #endif goto out; } break; } #endif /* End of IA64 */ /* ANDROID support update. */ #ifdef UNW_TARGET_MIPS #ifdef HAVE_TTRACE # warning No support for ttrace() yet. #else typedef struct { uint64_t regs[32]; uint64_t lo; uint64_t hi; uint64_t epc; uint64_t badvaddr; uint64_t status; uint64_t cause; } user_regs_struct_t; user_regs_struct_t regs; if (write) { Debug(2, "write not support on mips ptrace.\n"); return -UNW_EINVAL; } else { if (ptrace(PTRACE_GETREGS, pid, 0, ®s)) { goto badreg; } if (reg <= UNW_MIPS_R31) { *val = regs.regs[reg]; return 0; } else if (reg == UNW_MIPS_PC) { *val = regs.epc; return 0; } goto badreg; } #endif #endif /* End of mips */ /* End of ANDROID update. */ if ((unsigned) reg >= ARRAY_SIZE (_UPT_reg_offset)) { #if UNW_DEBUG Debug(2, "register out of range: >= %zu / %zu\n", sizeof(_UPT_reg_offset), sizeof(_UPT_reg_offset[0])); #endif errno = EINVAL; goto badreg; } #ifdef HAVE_TTRACE # warning No support for ttrace() yet. #else errno = 0; if (write) ptrace (PTRACE_POKEUSER, pid, _UPT_reg_offset[reg], *val); else { #if UNW_DEBUG Debug(16, "ptrace PEEKUSER pid: %lu , reg: %lu , offs: %lu\n", (unsigned long)pid, (unsigned long)reg, (unsigned long)_UPT_reg_offset[reg]); #endif *val = ptrace (PTRACE_PEEKUSER, pid, _UPT_reg_offset[reg], 0); } if (errno) { #if UNW_DEBUG Debug(2, "ptrace failure\n"); #endif goto badreg; } #endif #ifdef UNW_TARGET_IA64 out: #endif #if UNW_DEBUG if (!write) Debug (16, "%s[%u] -> %lx\n", unw_regname (reg), (unsigned) reg, (long) *val); #endif return 0; badreg: Debug (1, "bad register %s [%u] (error: %s)\n", unw_regname(reg), reg, strerror (errno)); return -UNW_EBADREG; } #elif HAVE_DECL_PT_GETREGS int _UPT_access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val, int write, void *arg) { struct UPT_info *ui = arg; pid_t pid = ui->pid; gregset_t regs; char *r; #if UNW_DEBUG Debug(16, "using getregs: reg: %s [%u], val: %lx, write: %u\n", unw_regname(reg), (unsigned) reg, (long) val, write); if (write) Debug (16, "%s [%u] <- %lx\n", unw_regname (reg), (unsigned) reg, (long) *val); #endif if ((unsigned) reg >= ARRAY_SIZE (_UPT_reg_offset)) { errno = EINVAL; goto badreg; } r = (char *)®s + _UPT_reg_offset[reg]; if (ptrace(PT_GETREGS, pid, (caddr_t)®s, 0) == -1) goto badreg; if (write) { memcpy(r, val, sizeof(unw_word_t)); if (ptrace(PT_SETREGS, pid, (caddr_t)®s, 0) == -1) goto badreg; } else memcpy(val, r, sizeof(unw_word_t)); return 0; badreg: Debug (1, "bad register %s [%u] (error: %s)\n", unw_regname(reg), reg, strerror (errno)); return -UNW_EBADREG; } #else #error Port me #endif