#include "gdbsupport/selftest.h"
+#include "elf/common.h"
+#include "elf/aarch64.h"
+
/* Signal frame handling.
+------------+ ^
{
struct gdbarch *gdbarch = get_frame_arch (this_frame);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- aarch64_gdbarch_tdep *tdep = (aarch64_gdbarch_tdep *) gdbarch_tdep (gdbarch);
+ aarch64_gdbarch_tdep *tdep = gdbarch_tdep<aarch64_gdbarch_tdep> (gdbarch);
CORE_ADDR sp = get_frame_register_unsigned (this_frame, AARCH64_SP_REGNUM);
CORE_ADDR sigcontext_addr = (sp + AARCH64_RT_SIGFRAME_UCONTEXT_OFFSET
+ AARCH64_UCONTEXT_SIGCONTEXT_OFFSET );
gdb_byte *header = (gdb_byte *) buf;
struct gdbarch *gdbarch = regcache->arch ();
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- aarch64_gdbarch_tdep *tdep = (aarch64_gdbarch_tdep *) gdbarch_tdep (gdbarch);
+ aarch64_gdbarch_tdep *tdep = gdbarch_tdep<aarch64_gdbarch_tdep> (gdbarch);
uint64_t vq = tdep->vq;
gdb_assert (buf != NULL);
void *cb_data,
const struct regcache *regcache)
{
- aarch64_gdbarch_tdep *tdep = (aarch64_gdbarch_tdep *) gdbarch_tdep (gdbarch);
+ aarch64_gdbarch_tdep *tdep = gdbarch_tdep<aarch64_gdbarch_tdep> (gdbarch);
cb (".reg", AARCH64_LINUX_SIZEOF_GREGSET, AARCH64_LINUX_SIZEOF_GREGSET,
&aarch64_linux_gregset, NULL, cb_data);
CORE_ADDR hwcap = linux_get_hwcap (target);
CORE_ADDR hwcap2 = linux_get_hwcap2 (target);
- bool pauth_p = hwcap & AARCH64_HWCAP_PACA;
- bool mte_p = hwcap2 & HWCAP2_MTE;
- return aarch64_read_description (aarch64_linux_core_read_vq (gdbarch, abfd),
- pauth_p, mte_p, tls != nullptr);
+ aarch64_features features;
+ features.vq = aarch64_linux_core_read_vq (gdbarch, abfd);
+ features.pauth = hwcap & AARCH64_HWCAP_PACA;
+ features.mte = hwcap2 & HWCAP2_MTE;
+ features.tls = tls != nullptr;
+
+ return aarch64_read_description (features);
}
/* Implementation of `gdbarch_stap_is_single_operand', as defined in
aarch64_sys_finit_module = 273,
aarch64_sys_sched_setattr = 274,
aarch64_sys_sched_getattr = 275,
+ aarch64_sys_getrandom = 278
};
/* aarch64_canonicalize_syscall maps syscall ids from the native AArch64
UNSUPPORTED_SYSCALL_MAP (finit_module);
UNSUPPORTED_SYSCALL_MAP (sched_setattr);
UNSUPPORTED_SYSCALL_MAP (sched_getattr);
+ SYSCALL_MAP (getrandom);
default:
return gdb_sys_no_syscall;
}
struct ui_out *uiout,
enum gdb_signal siggnal)
{
- aarch64_gdbarch_tdep *tdep = (aarch64_gdbarch_tdep *) gdbarch_tdep (gdbarch);
+ aarch64_gdbarch_tdep *tdep = gdbarch_tdep<aarch64_gdbarch_tdep> (gdbarch);
if (!tdep->has_mte () || siggnal != GDB_SIGNAL_SEGV)
return;
}
}
+/* AArch64 Linux implementation of the gdbarch_create_memtag_section hook. */
+
+static asection *
+aarch64_linux_create_memtag_section (struct gdbarch *gdbarch, bfd *obfd,
+ CORE_ADDR address, size_t size)
+{
+ gdb_assert (obfd != nullptr);
+ gdb_assert (size > 0);
+
+ /* Create the section and associated program header.
+
+ Make sure the section's flags has SEC_HAS_CONTENTS, otherwise BFD will
+ refuse to write data to this section. */
+ asection *mte_section
+ = bfd_make_section_anyway_with_flags (obfd, "memtag", SEC_HAS_CONTENTS);
+
+ if (mte_section == nullptr)
+ return nullptr;
+
+ bfd_set_section_vma (mte_section, address);
+ /* The size of the memory range covered by the memory tags. We reuse the
+ section's rawsize field for this purpose. */
+ mte_section->rawsize = size;
+
+ /* Fetch the number of tags we need to save. */
+ size_t tags_count
+ = aarch64_mte_get_tag_granules (address, size, AARCH64_MTE_GRANULE_SIZE);
+ /* Tags are stored packed as 2 tags per byte. */
+ bfd_set_section_size (mte_section, (tags_count + 1) >> 1);
+ /* Store program header information. */
+ bfd_record_phdr (obfd, PT_AARCH64_MEMTAG_MTE, 1, 0, 0, 0, 0, 0, 1,
+ &mte_section);
+
+ return mte_section;
+}
+
+/* Maximum number of tags to request. */
+#define MAX_TAGS_TO_TRANSFER 1024
+
+/* AArch64 Linux implementation of the gdbarch_fill_memtag_section hook. */
+
+static bool
+aarch64_linux_fill_memtag_section (struct gdbarch *gdbarch, asection *osec)
+{
+ /* We only handle MTE tags for now. */
+
+ size_t segment_size = osec->rawsize;
+ CORE_ADDR start_address = bfd_section_vma (osec);
+ CORE_ADDR end_address = start_address + segment_size;
+
+ /* Figure out how many tags we need to store in this memory range. */
+ size_t granules = aarch64_mte_get_tag_granules (start_address, segment_size,
+ AARCH64_MTE_GRANULE_SIZE);
+
+ /* If there are no tag granules to fetch, just return. */
+ if (granules == 0)
+ return true;
+
+ CORE_ADDR address = start_address;
+
+ /* Vector of tags. */
+ gdb::byte_vector tags;
+
+ while (granules > 0)
+ {
+ /* Transfer tags in chunks. */
+ gdb::byte_vector tags_read;
+ size_t xfer_len
+ = ((granules >= MAX_TAGS_TO_TRANSFER)
+ ? MAX_TAGS_TO_TRANSFER * AARCH64_MTE_GRANULE_SIZE
+ : granules * AARCH64_MTE_GRANULE_SIZE);
+
+ if (!target_fetch_memtags (address, xfer_len, tags_read,
+ static_cast<int> (memtag_type::allocation)))
+ {
+ warning (_("Failed to read MTE tags from memory range [%s,%s)."),
+ phex_nz (start_address, sizeof (start_address)),
+ phex_nz (end_address, sizeof (end_address)));
+ return false;
+ }
+
+ /* Transfer over the tags that have been read. */
+ tags.insert (tags.end (), tags_read.begin (), tags_read.end ());
+
+ /* Adjust the remaining granules and starting address. */
+ granules -= tags_read.size ();
+ address += tags_read.size () * AARCH64_MTE_GRANULE_SIZE;
+ }
+
+ /* Pack the MTE tag bits. */
+ aarch64_mte_pack_tags (tags);
+
+ if (!bfd_set_section_contents (osec->owner, osec, tags.data (),
+ 0, tags.size ()))
+ {
+ warning (_("Failed to write %s bytes of corefile memory "
+ "tag content (%s)."),
+ pulongest (tags.size ()),
+ bfd_errmsg (bfd_get_error ()));
+ }
+ return true;
+}
+
+/* AArch64 Linux implementation of the gdbarch_decode_memtag_section
+ hook. Decode a memory tag section and return the requested tags.
+
+ The section is guaranteed to cover the [ADDRESS, ADDRESS + length)
+ range. */
+
+static gdb::byte_vector
+aarch64_linux_decode_memtag_section (struct gdbarch *gdbarch,
+ bfd_section *section,
+ int type,
+ CORE_ADDR address, size_t length)
+{
+ gdb_assert (section != nullptr);
+
+ /* The requested address must not be less than section->vma. */
+ gdb_assert (section->vma <= address);
+
+ /* Figure out how many tags we need to fetch in this memory range. */
+ size_t granules = aarch64_mte_get_tag_granules (address, length,
+ AARCH64_MTE_GRANULE_SIZE);
+ /* Sanity check. */
+ gdb_assert (granules > 0);
+
+ /* Fetch the total number of tags in the range [VMA, address + length). */
+ size_t granules_from_vma
+ = aarch64_mte_get_tag_granules (section->vma,
+ address - section->vma + length,
+ AARCH64_MTE_GRANULE_SIZE);
+
+ /* Adjust the tags vector to contain the exact number of packed bytes. */
+ gdb::byte_vector tags (((granules - 1) >> 1) + 1);
+
+ /* Figure out the starting offset into the packed tags data. */
+ file_ptr offset = ((granules_from_vma - granules) >> 1);
+
+ if (!bfd_get_section_contents (section->owner, section, tags.data (),
+ offset, tags.size ()))
+ error (_("Couldn't read contents from memtag section."));
+
+ /* At this point, the tags are packed 2 per byte. Unpack them before
+ returning. */
+ bool skip_first = ((granules_from_vma - granules) % 2) != 0;
+ aarch64_mte_unpack_tags (tags, skip_first);
+
+ /* Resize to the exact number of tags that was requested. */
+ tags.resize (granules);
+
+ return tags;
+}
+
static void
aarch64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
NULL };
static const char *const stap_register_indirection_suffixes[] = { "]",
NULL };
- aarch64_gdbarch_tdep *tdep = (aarch64_gdbarch_tdep *) gdbarch_tdep (gdbarch);
+ aarch64_gdbarch_tdep *tdep = gdbarch_tdep<aarch64_gdbarch_tdep> (gdbarch);
tdep->lowest_pc = 0x8000;
set_gdbarch_report_signal_info (gdbarch,
aarch64_linux_report_signal_info);
+
+ /* Core file helpers. */
+
+ /* Core file helper to create a memory tag section for a particular
+ PT_LOAD segment. */
+ set_gdbarch_create_memtag_section
+ (gdbarch, aarch64_linux_create_memtag_section);
+
+ /* Core file helper to fill a memory tag section with tag data. */
+ set_gdbarch_fill_memtag_section
+ (gdbarch, aarch64_linux_fill_memtag_section);
+
+ /* Core file helper to decode a memory tag section. */
+ set_gdbarch_decode_memtag_section (gdbarch,
+ aarch64_linux_decode_memtag_section);
}
/* Initialize the aarch64_linux_record_tdep. */
projects / binutils-gdb.git / blobdiff