diff options
Diffstat (limited to 'src/third_party/unwind/dist/src/ptrace/_UPT_access_fpreg.c')
| -rw-r--r-- | src/third_party/unwind/dist/src/ptrace/_UPT_access_fpreg.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/src/third_party/unwind/dist/src/ptrace/_UPT_access_fpreg.c b/src/third_party/unwind/dist/src/ptrace/_UPT_access_fpreg.c new file mode 100644 index 00000000000..37cd4ffe1c2 --- /dev/null +++ b/src/third_party/unwind/dist/src/ptrace/_UPT_access_fpreg.c @@ -0,0 +1,128 @@ +/* libunwind - a platform-independent unwind library + Copyright (C) 2003 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 HAVE_DECL_PTRACE_POKEUSER || HAVE_TTRACE +int +_UPT_access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val, + int write, void *arg) +{ + unw_word_t *wp = (unw_word_t *) val; + struct UPT_info *ui = arg; + pid_t pid = ui->pid; + int i; + + if ((unsigned) reg >= ARRAY_SIZE (_UPT_reg_offset)) + return -UNW_EBADREG; + + errno = 0; + if (write) + for (i = 0; i < (int) (sizeof (*val) / sizeof (wp[i])); ++i) + { +#ifdef HAVE_TTRACE +# warning No support for ttrace() yet. +#else + ptrace (PTRACE_POKEUSER, pid, _UPT_reg_offset[reg] + i * sizeof(wp[i]), + wp[i]); +#endif + if (errno) + return -UNW_EBADREG; + } + else + for (i = 0; i < (int) (sizeof (*val) / sizeof (wp[i])); ++i) + { +#ifdef HAVE_TTRACE +# warning No support for ttrace() yet. +#else + wp[i] = ptrace (PTRACE_PEEKUSER, pid, + _UPT_reg_offset[reg] + i * sizeof(wp[i]), 0); +#endif + if (errno) + return -UNW_EBADREG; + } + return 0; +} +#elif HAVE_DECL_PT_GETFPREGS +int +_UPT_access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val, + int write, void *arg) +{ + struct UPT_info *ui = arg; + pid_t pid = ui->pid; + fpregset_t fpreg; + +#if defined(__amd64__) + if (1) /* XXXKIB */ + return -UNW_EBADREG; +#elif defined(__i386__) + if ((unsigned) reg < UNW_X86_ST0 || (unsigned) reg > UNW_X86_ST7) + return -UNW_EBADREG; +#elif defined(__arm__) + if ((unsigned) reg < UNW_ARM_F0 || (unsigned) reg > UNW_ARM_F7) + return -UNW_EBADREG; +#elif defined(__aarch64__) + if ((unsigned) reg < UNW_AARCH64_V0 || (unsigned) reg > UNW_AARCH64_V31) + return -UNW_EBADREG; +#else +#error Fix me +#endif + if ((unsigned) reg >= ARRAY_SIZE (_UPT_reg_offset)) + return -UNW_EBADREG; + + if (ptrace(PT_GETFPREGS, pid, (caddr_t)&fpreg, 0) == -1) + return -UNW_EBADREG; + if (write) { +#if defined(__amd64__) + memcpy(&fpreg.fpr_xacc[reg], val, sizeof(unw_fpreg_t)); +#elif defined(__i386__) + memcpy(&fpreg.fpr_acc[reg], val, sizeof(unw_fpreg_t)); +#elif defined(__arm__) + memcpy(&fpreg.fpr[reg], val, sizeof(unw_fpreg_t)); +#elif defined(__aarch64__) + memcpy(&fpreg.fp_q[reg], val, sizeof(unw_fpreg_t)); +#else +#error Fix me +#endif + if (ptrace(PT_SETFPREGS, pid, (caddr_t)&fpreg, 0) == -1) + return -UNW_EBADREG; + } else +#if defined(__amd64__) + memcpy(val, &fpreg.fpr_xacc[reg], sizeof(unw_fpreg_t)); +#elif defined(__i386__) + memcpy(val, &fpreg.fpr_acc[reg], sizeof(unw_fpreg_t)); +#elif defined(__arm__) + memcpy(val, &fpreg.fpr[reg], sizeof(unw_fpreg_t)); +#elif defined(__aarch64__) + memcpy(val, &fpreg.fp_q[reg], sizeof(unw_fpreg_t)); +#else +#error Fix me +#endif + return 0; +} +#else +#error Fix me +#endif |