From 251ac1dcd456c524eb7b79507c4a8a1bf4a4fa32 Mon Sep 17 00:00:00 2001 From: Laszlo Ersek Date: Fri, 7 Nov 2014 17:17:54 +0100 Subject: [PATCH 07/41] dump: add API to write elf notes to buffer Message-id: <1415380693-16593-8-git-send-email-lersek@redhat.com> Patchwork-id: 62193 O-Subject: [RHEL-7.1 qemu-kvm PATCH 07/26] dump: add API to write elf notes to buffer Bugzilla: 1157798 RH-Acked-by: Stefan Hajnoczi RH-Acked-by: Luiz Capitulino RH-Acked-by: dgibson From: qiaonuohan the function can be used by write_elf32_notes/write_elf64_notes to write notes to a buffer. If fd_write_vmcore is used, write_elf32_notes/write_elf64_notes will write elf notes to vmcore directly. Instead, if buf_write_note is used, elf notes will be written to opaque->note_buf at first. Signed-off-by: Qiao Nuohan Reviewed-by: Laszlo Ersek Signed-off-by: Luiz Capitulino (cherry picked from commit 4835ef7784502c231f243c3133054850d23dd837) Signed-off-by: Laszlo Ersek Signed-off-by: Miroslav Rezanina --- dump.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/dump.c b/dump.c index 710893f..3c6d526 100644 --- a/dump.c +++ b/dump.c @@ -76,6 +76,9 @@ typedef struct DumpState { int64_t begin; int64_t length; Error **errp; + + uint8_t *note_buf; /* buffer for notes */ + size_t note_buf_offset; /* the writing place in note_buf */ } DumpState; static int dump_cleanup(DumpState *s) @@ -755,6 +758,22 @@ static int write_buffer(int fd, off_t offset, const void *buf, size_t size) return 0; } +static int buf_write_note(const void *buf, size_t size, void *opaque) +{ + DumpState *s = opaque; + + /* note_buf is not enough */ + if (s->note_buf_offset + size > s->note_size) { + return -1; + } + + memcpy(s->note_buf + s->note_buf_offset, buf, size); + + s->note_buf_offset += size; + + return 0; +} + static ram_addr_t get_start_block(DumpState *s) { GuestPhysBlock *block; -- 1.8.3.1