mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-11-05 01:09:27 +01:00
Fix compiler warnings on x86_64
This commit is contained in:
parent
af9daf66af
commit
491d576529
5 changed files with 128 additions and 118 deletions
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@ -178,6 +178,11 @@ typedef sigset_t intrmask_t;
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extern intrmask_t unwi_full_mask;
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/* Silence compiler warnings about variables which are used only if libunwind
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is configured in a certain way */
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static inline void mark_as_used(void *v) {
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}
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#if defined(CONFIG_BLOCK_SIGNALS)
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# define SIGPROCMASK(how, new_mask, old_mask) \
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sigprocmask((how), (new_mask), (old_mask))
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@ -191,11 +196,13 @@ extern intrmask_t unwi_full_mask;
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#define lock_acquire(l,m) \
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do { \
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SIGPROCMASK (SIG_SETMASK, &unwi_full_mask, &(m)); \
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mark_as_used(&(m)); \
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mutex_lock (l); \
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} while (0)
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#define lock_release(l,m) \
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do { \
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mutex_unlock (l); \
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mark_as_used(&(m)); \
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SIGPROCMASK (SIG_SETMASK, &(m), NULL); \
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} while (0)
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@ -272,10 +279,10 @@ do { \
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# define Dprintf(format...)
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#endif
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static ALWAYS_INLINE void
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static ALWAYS_INLINE int
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print_error (const char *string)
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{
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write (2, string, strlen (string));
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return write (2, string, strlen (string));
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}
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#define mi_init UNWI_ARCH_OBJ(mi_init)
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@ -416,7 +416,6 @@ callback (struct dl_phdr_info *info, size_t size, void *ptr)
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struct dwarf_eh_frame_hdr *hdr;
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unw_accessors_t *a;
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long n;
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struct unw_debug_frame_list *fdesc = 0;
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int found = 0;
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ip = cb_data->ip;
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@ -576,139 +575,141 @@ callback (struct dl_phdr_info *info, size_t size, void *ptr)
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}
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#ifdef CONFIG_DEBUG_FRAME
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{
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struct unw_debug_frame_list *fdesc = 0;
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Debug (15, "Trying to find .debug_frame\n");
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di = &cb_data->di_debug;
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fdesc = locate_debug_info (unw_local_addr_space, info, ip, info->dlpi_name);
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Debug (15, "Trying to find .debug_frame\n");
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di = &cb_data->di_debug;
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fdesc = locate_debug_info (unw_local_addr_space, info, ip, info->dlpi_name);
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if (!fdesc)
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{
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Debug (15, "couldn't load .debug_frame\n");
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return found;
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}
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else
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{
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char *buf;
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size_t bufsize;
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unw_word_t item_start, item_end = 0;
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uint32_t u32val = 0;
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uint64_t cie_id = 0;
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struct debug_frame_tab *tab;
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if (!fdesc)
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{
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Debug (15, "couldn't load .debug_frame\n");
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return found;
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}
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else
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{
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char *buf;
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size_t bufsize;
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unw_word_t item_start, item_end = 0;
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uint32_t u32val = 0;
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uint64_t cie_id = 0;
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struct debug_frame_tab *tab;
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Debug (15, "loaded .debug_frame\n");
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Debug (15, "loaded .debug_frame\n");
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buf = fdesc->debug_frame;
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bufsize = fdesc->debug_frame_size;
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buf = fdesc->debug_frame;
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bufsize = fdesc->debug_frame_size;
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if (bufsize == 0)
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{
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Debug (15, "zero-length .debug_frame\n");
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return found;
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}
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if (bufsize == 0)
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{
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Debug (15, "zero-length .debug_frame\n");
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return found;
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}
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/* Now create a binary-search table, if it does not already exist. */
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if (!fdesc->index)
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{
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addr = (unw_word_t) (uintptr_t) buf;
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/* Now create a binary-search table, if it does not already exist. */
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if (!fdesc->index)
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{
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addr = (unw_word_t) (uintptr_t) buf;
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a = unw_get_accessors (unw_local_addr_space);
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a = unw_get_accessors (unw_local_addr_space);
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/* Find all FDE entries in debug_frame, and make into a sorted
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index. */
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/* Find all FDE entries in debug_frame, and make into a sorted
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index. */
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tab = debug_frame_tab_new (16);
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tab = debug_frame_tab_new (16);
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while (addr < (unw_word_t) (uintptr_t) (buf + bufsize))
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{
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uint64_t id_for_cie;
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item_start = addr;
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while (addr < (unw_word_t) (uintptr_t) (buf + bufsize))
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{
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uint64_t id_for_cie;
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item_start = addr;
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dwarf_readu32 (unw_local_addr_space, a, &addr, &u32val, NULL);
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dwarf_readu32 (unw_local_addr_space, a, &addr, &u32val, NULL);
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if (u32val == 0)
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break;
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else if (u32val != 0xffffffff)
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{
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uint32_t cie_id32 = 0;
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item_end = addr + u32val;
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dwarf_readu32 (unw_local_addr_space, a, &addr, &cie_id32,
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NULL);
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cie_id = cie_id32;
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id_for_cie = 0xffffffff;
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}
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else
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{
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uint64_t u64val = 0;
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/* Extended length. */
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dwarf_readu64 (unw_local_addr_space, a, &addr, &u64val, NULL);
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item_end = addr + u64val;
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if (u32val == 0)
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break;
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else if (u32val != 0xffffffff)
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{
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uint32_t cie_id32 = 0;
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item_end = addr + u32val;
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dwarf_readu32 (unw_local_addr_space, a, &addr, &cie_id32,
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NULL);
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cie_id = cie_id32;
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id_for_cie = 0xffffffff;
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}
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else
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{
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uint64_t u64val = 0;
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/* Extended length. */
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dwarf_readu64 (unw_local_addr_space, a, &addr, &u64val, NULL);
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item_end = addr + u64val;
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dwarf_readu64 (unw_local_addr_space, a, &addr, &cie_id, NULL);
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id_for_cie = 0xffffffffffffffffull;
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}
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dwarf_readu64 (unw_local_addr_space, a, &addr, &cie_id, NULL);
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id_for_cie = 0xffffffffffffffffull;
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}
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/*Debug (1, "CIE/FDE id = %.8x\n", (int) cie_id);*/
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/*Debug (1, "CIE/FDE id = %.8x\n", (int) cie_id);*/
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if (cie_id == id_for_cie)
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;
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/*Debug (1, "Found CIE at %.8x.\n", item_start);*/
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else
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{
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unw_word_t fde_addr = item_start;
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unw_proc_info_t this_pi;
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int err;
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if (cie_id == id_for_cie)
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;
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/*Debug (1, "Found CIE at %.8x.\n", item_start);*/
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else
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{
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unw_word_t fde_addr = item_start;
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unw_proc_info_t this_pi;
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int err;
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/*Debug (1, "Found FDE at %.8x\n", item_start);*/
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/*Debug (1, "Found FDE at %.8x\n", item_start);*/
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err = dwarf_extract_proc_info_from_fde (unw_local_addr_space,
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a, &fde_addr,
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&this_pi, 0,
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(uintptr_t) buf,
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NULL);
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if (err == 0)
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{
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Debug (15, "start_ip = %x, end_ip = %x\n",
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(int) this_pi.start_ip, (int) this_pi.end_ip);
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debug_frame_tab_append (tab,
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item_start - (unw_word_t) (uintptr_t) buf,
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this_pi.start_ip);
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}
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/*else
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Debug (1, "FDE parse failed\n");*/
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}
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err = dwarf_extract_proc_info_from_fde (unw_local_addr_space,
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a, &fde_addr,
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&this_pi, 0,
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(uintptr_t) buf,
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NULL);
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if (err == 0)
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{
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Debug (15, "start_ip = %x, end_ip = %x\n",
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(int) this_pi.start_ip, (int) this_pi.end_ip);
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debug_frame_tab_append (tab,
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item_start - (unw_word_t) (uintptr_t) buf,
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this_pi.start_ip);
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}
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/*else
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Debug (1, "FDE parse failed\n");*/
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}
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addr = item_end;
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}
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addr = item_end;
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}
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debug_frame_tab_shrink (tab);
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qsort (tab->tab, tab->length, sizeof (struct table_entry),
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debug_frame_tab_compare);
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/* for (i = 0; i < tab->length; i++)
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{
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fprintf (stderr, "ip %x, fde offset %x\n",
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(int) tab->tab[i].start_ip_offset,
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(int) tab->tab[i].fde_offset);
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}*/
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fdesc->index = tab->tab;
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fdesc->index_size = tab->length;
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free (tab);
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}
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debug_frame_tab_shrink (tab);
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qsort (tab->tab, tab->length, sizeof (struct table_entry),
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debug_frame_tab_compare);
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/* for (i = 0; i < tab->length; i++)
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{
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fprintf (stderr, "ip %x, fde offset %x\n",
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(int) tab->tab[i].start_ip_offset,
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(int) tab->tab[i].fde_offset);
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}*/
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fdesc->index = tab->tab;
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fdesc->index_size = tab->length;
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free (tab);
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}
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di->format = UNW_INFO_FORMAT_TABLE;
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di->start_ip = fdesc->start;
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di->end_ip = fdesc->end;
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di->u.ti.name_ptr = (unw_word_t) (uintptr_t) info->dlpi_name;
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di->u.ti.table_data = (unw_word_t *) fdesc;
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di->u.ti.table_len = sizeof (*fdesc) / sizeof (unw_word_t);
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di->u.ti.segbase = (unw_word_t) (uintptr_t) info->dlpi_addr;
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di->format = UNW_INFO_FORMAT_TABLE;
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di->start_ip = fdesc->start;
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di->end_ip = fdesc->end;
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di->u.ti.name_ptr = (unw_word_t) (uintptr_t) info->dlpi_name;
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di->u.ti.table_data = (unw_word_t *) fdesc;
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di->u.ti.table_len = sizeof (*fdesc) / sizeof (unw_word_t);
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di->u.ti.segbase = (unw_word_t) (uintptr_t) info->dlpi_addr;
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found = 1;
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Debug (15, "found debug_frame table `%s': segbase=0x%lx, len=%lu, "
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"gp=0x%lx, table_data=0x%lx\n",
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(char *) (uintptr_t) di->u.ti.name_ptr,
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(long) di->u.ti.segbase, (long) di->u.ti.table_len,
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(long) di->gp, (long) di->u.ti.table_data);
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}
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found = 1;
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Debug (15, "found debug_frame table `%s': segbase=0x%lx, len=%lu, "
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"gp=0x%lx, table_data=0x%lx\n",
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(char *) (uintptr_t) di->u.ti.name_ptr,
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(long) di->u.ti.segbase, (long) di->u.ti.table_len,
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(long) di->gp, (long) di->u.ti.table_data);
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}
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}
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#endif /* CONFIG_DEBUG_FRAME */
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return found;
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@ -29,7 +29,6 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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HIDDEN int
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dwarf_step (struct dwarf_cursor *c)
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{
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unw_word_t prev_cfa = c->cfa;
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int ret;
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if ((ret = dwarf_find_save_locs (c)) >= 0) {
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@ -71,7 +71,7 @@ x86_64_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
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{
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Debug (8, "resuming at ip=%llx via setcontext()\n",
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(unsigned long long) c->dwarf.ip);
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_Ux86_64_setcontext (uc);
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setcontext (uc);
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}
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#else
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# warning Implement me!
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@ -58,6 +58,7 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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#define x86_64_lock UNW_OBJ(lock)
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#define x86_64_local_resume UNW_OBJ(local_resume)
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#define x86_64_local_addr_space_init UNW_OBJ(local_addr_space_init)
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#define setcontext UNW_ARCH_OBJ (setcontext)
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#if 0
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#define x86_64_scratch_loc UNW_OBJ(scratch_loc)
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#endif
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@ -65,6 +66,8 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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extern void x86_64_local_addr_space_init (void);
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extern int x86_64_local_resume (unw_addr_space_t as, unw_cursor_t *cursor,
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void *arg);
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extern int setcontext (const ucontext_t *ucp);
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#if 0
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extern dwarf_loc_t x86_64_scratch_loc (struct cursor *c, unw_regnum_t reg);
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#endif
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