Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging

* cpu-exec fixes (Emilio, Laurent)
* TCG bugfix in queue.h (Paolo)
* high address load for linuxboot (Zhijian)
* PVH support (Liam, Stefano)
* misc i386 changes (Paolo, Robert, Doug)
* configure tweak for openpty (Thomas)
* elf2dmp port to Windows (Viktor)
* initial improvements to Makefile infrastructure (Yang + GSoC 2013)

# gpg: Signature made Tue 05 Feb 2019 17:34:42 GMT
# gpg:                using RSA key BFFBD25F78C7AE83
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [full]
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>" [full]
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4  E2F7 7E15 100C CD36 69B1
#      Subkey fingerprint: F133 3857 4B66 2389 866C  7682 BFFB D25F 78C7 AE83

* remotes/bonzini/tags/for-upstream: (76 commits)
  queue: fix QTAILQ_FOREACH_REVERSE_SAFE
  scsi-generic: Convert from DPRINTF() macro to trace events
  scsi-disk: Convert from DPRINTF() macro to trace events
  pc: Use hotplug_handler_(plug|unplug|unplug_request)
  i386: hvf: Fix smp boot hangs
  hw/vfio/Makefile.objs: Create new CONFIG_* variables for VFIO core and PCI
  hw/i2c/Makefile.objs: Create new CONFIG_* variables for EEPROM and ACPI controller
  hw/tricore/Makefile.objs: Create CONFIG_* for tricore
  hw/openrisc/Makefile.objs: Create CONFIG_* for openrisc
  hw/moxie/Makefile.objs: Conditionally build moxie
  hw/hppa/Makefile.objs: Create CONFIG_* for hppa
  hw/cris/Makefile.objs: Create CONFIG_* for cris
  hw/alpha/Makefile.objs: Create CONFIG_* for alpha
  hw/sparc64/Makefile.objs: Create CONFIG_* for sparc64
  hw/riscv/Makefile.objs: Create CONFIG_* for riscv boards
  hw/nios2/Makefile.objs: Conditionally build nios2
  hw/xtensa/Makefile.objs: Build xtensa_sim and xtensa_fpga conditionally
  hw/lm32/Makefile.objs: Conditionally build lm32 and milkmyst
  hw/sparc/Makefile.objs: CONFIG_* for sun4m and leon3 created
  hw/s390/Makefile.objs: Create new CONFIG_* variables for s390x boards and devices
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

# Conflicts:
#	qemu-deprecated.texi

1 files changed, 77 insertions, 0 deletions

diff --git a/include/hw/elf_ops.h b/include/hw/elf_ops.h
index e2cb675195..690f9238c8 100644
--- a/include/hw/elf_ops.h
+++ b/include/hw/elf_ops.h
@@ -265,7 +265,53 @@ fail:
     return ret;
 }
 
+/*
+ * Given 'nhdr', a pointer to a range of ELF Notes, search through them
+ * for a note matching type 'elf_note_type' and return a pointer to
+ * the matching ELF note.
+ */
+static struct elf_note *glue(get_elf_note_type, SZ)(struct elf_note *nhdr,
+                                                    elf_word note_size,
+                                                    elf_word phdr_align,
+                                                    elf_word elf_note_type)
+{
+    elf_word nhdr_size = sizeof(struct elf_note);
+    elf_word elf_note_entry_offset = 0;
+    elf_word note_type;
+    elf_word nhdr_namesz;
+    elf_word nhdr_descsz;
+
+    if (nhdr == NULL) {
+        return NULL;
+    }
+
+    note_type = nhdr->n_type;
+    while (note_type != elf_note_type) {
+        nhdr_namesz = nhdr->n_namesz;
+        nhdr_descsz = nhdr->n_descsz;
+
+        elf_note_entry_offset = nhdr_size +
+            QEMU_ALIGN_UP(nhdr_namesz, phdr_align) +
+            QEMU_ALIGN_UP(nhdr_descsz, phdr_align);
+
+        /*
+         * If the offset calculated in this iteration exceeds the
+         * supplied size, we are done and no matching note was found.
+         */
+        if (elf_note_entry_offset > note_size) {
+            return NULL;
+        }
+
+        /* skip to the next ELF Note entry */
+        nhdr = (void *)nhdr + elf_note_entry_offset;
+        note_type = nhdr->n_type;
+    }
+
+    return nhdr;
+}
+
 static int glue(load_elf, SZ)(const char *name, int fd,
+                              uint64_t (*elf_note_fn)(void *, void *, bool),
                               uint64_t (*translate_fn)(void *, uint64_t),
                               void *translate_opaque,
                               int must_swab, uint64_t *pentry,
@@ -496,8 +542,39 @@ static int glue(load_elf, SZ)(const char *name, int fd,
                 high = addr + mem_size;
 
             data = NULL;
+
+        } else if (ph->p_type == PT_NOTE && elf_note_fn) {
+            struct elf_note *nhdr = NULL;
+
+            file_size = ph->p_filesz; /* Size of the range of ELF notes */
+            data = g_malloc0(file_size);
+            if (ph->p_filesz > 0) {
+                if (lseek(fd, ph->p_offset, SEEK_SET) < 0) {
+                    goto fail;
+                }
+                if (read(fd, data, file_size) != file_size) {
+                    goto fail;
+                }
+            }
+
+            /*
+             * Search the ELF notes to find one with a type matching the
+             * value passed in via 'translate_opaque'
+             */
+            nhdr = (struct elf_note *)data;
+            assert(translate_opaque != NULL);
+            nhdr = glue(get_elf_note_type, SZ)(nhdr, file_size, ph->p_align,
+                                               *(uint64_t *)translate_opaque);
+            if (nhdr != NULL) {
+                bool is64 =
+                    sizeof(struct elf_note) == sizeof(struct elf64_note);
+                elf_note_fn((void *)nhdr, (void *)&ph->p_align, is64);
+            }
+            g_free(data);
+            data = NULL;
         }
     }
+
     g_free(phdr);
     if (lowaddr)
         *lowaddr = (uint64_t)(elf_sword)low;