[Qemu-devel] [PULL 0/4] Multiboot patches

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* [Qemu-devel] [PULL 0/4] Multiboot patches
@ 2018-03-07 11:18 Kevin Wolf
  2018-03-07 11:18 ` [Qemu-devel] [PULL 1/4] multiboot: bss_end_addr can be zero Kevin Wolf
                   ` (4 more replies)
  0 siblings, 5 replies; 6+ messages in thread
From: Kevin Wolf @ 2018-03-07 11:18 UTC (permalink / raw)
  To: qemu-devel; +Cc: kwolf, jack.schwartz

The following changes since commit f32408f3b472a088467474ab152be3b6285b2d7b:

  misc: don't use hwaddr as a type in trace events (2018-03-06 14:24:30 +0000)

are available in the git repository at:

  git://repo.or.cz/qemu/kevin.git tags/for-upstream

for you to fetch changes up to 4b9006a41ea8818f2385ae5228e07f211bb4a33d:

  multiboot: fprintf(stderr...) -> error_report() (2018-03-07 11:53:37 +0100)

----------------------------------------------------------------
Multiboot patches

----------------------------------------------------------------
Jack Schwartz (4):
      multiboot: bss_end_addr can be zero
      multiboot: Remove unused variables from multiboot.c
      multiboot: Use header names when displaying fields
      multiboot: fprintf(stderr...) -> error_report()

 hw/i386/multiboot.c | 77 ++++++++++++++++++++++++++---------------------------
 1 file changed, 38 insertions(+), 39 deletions(-)

^ permalink raw reply	[flat|nested] 6+ messages in thread

* [Qemu-devel] [PULL 1/4] multiboot: bss_end_addr can be zero
  2018-03-07 11:18 [Qemu-devel] [PULL 0/4] Multiboot patches Kevin Wolf
@ 2018-03-07 11:18 ` Kevin Wolf
  2018-03-07 11:18 ` [Qemu-devel] [PULL 2/4] multiboot: Remove unused variables from multiboot.c Kevin Wolf
                   ` (3 subsequent siblings)
  4 siblings, 0 replies; 6+ messages in thread
From: Kevin Wolf @ 2018-03-07 11:18 UTC (permalink / raw)
  To: qemu-devel; +Cc: kwolf, jack.schwartz

From: Jack Schwartz <jack.schwartz@oracle.com>

The multiboot spec (https://www.gnu.org/software/grub/manual/multiboot/),
section 3.1.3, allows for bss_end_addr to be zero.

A zero bss_end_addr signifies there is no .bss section.

Suggested-by: Daniel Kiper <daniel.kiper@oracle.com>
Signed-off-by: Jack Schwartz <jack.schwartz@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Reviewed-by: Prasad J Pandit <pjp@fedoraproject.org>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 hw/i386/multiboot.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/hw/i386/multiboot.c b/hw/i386/multiboot.c
index 46d9c68bf5..bb8d8e4629 100644
--- a/hw/i386/multiboot.c
+++ b/hw/i386/multiboot.c
@@ -233,12 +233,6 @@ int load_multiboot(FWCfgState *fw_cfg,
         mh_entry_addr = ldl_p(header+i+28);
 
         if (mh_load_end_addr) {
-            if (mh_bss_end_addr < mh_load_addr) {
-                fprintf(stderr, "invalid mh_bss_end_addr address\n");
-                exit(1);
-            }
-            mb_kernel_size = mh_bss_end_addr - mh_load_addr;
-
             if (mh_load_end_addr < mh_load_addr) {
                 fprintf(stderr, "invalid mh_load_end_addr address\n");
                 exit(1);
@@ -249,8 +243,16 @@ int load_multiboot(FWCfgState *fw_cfg,
                 fprintf(stderr, "invalid kernel_file_size\n");
                 exit(1);
             }
-            mb_kernel_size = kernel_file_size - mb_kernel_text_offset;
-            mb_load_size = mb_kernel_size;
+            mb_load_size = kernel_file_size - mb_kernel_text_offset;
+        }
+        if (mh_bss_end_addr) {
+            if (mh_bss_end_addr < (mh_load_addr + mb_load_size)) {
+                fprintf(stderr, "invalid mh_bss_end_addr address\n");
+                exit(1);
+            }
+            mb_kernel_size = mh_bss_end_addr - mh_load_addr;
+        } else {
+            mb_kernel_size = mb_load_size;
         }
 
         /* Valid if mh_flags sets MULTIBOOT_HEADER_HAS_VBE.
-- 
2.13.6

^ permalink raw reply related	[flat|nested] 6+ messages in thread

* [Qemu-devel] [PULL 2/4] multiboot: Remove unused variables from multiboot.c
  2018-03-07 11:18 [Qemu-devel] [PULL 0/4] Multiboot patches Kevin Wolf
  2018-03-07 11:18 ` [Qemu-devel] [PULL 1/4] multiboot: bss_end_addr can be zero Kevin Wolf
@ 2018-03-07 11:18 ` Kevin Wolf
  2018-03-07 11:18 ` [Qemu-devel] [PULL 3/4] multiboot: Use header names when displaying fields Kevin Wolf
                   ` (2 subsequent siblings)
  4 siblings, 0 replies; 6+ messages in thread
From: Kevin Wolf @ 2018-03-07 11:18 UTC (permalink / raw)
  To: qemu-devel; +Cc: kwolf, jack.schwartz

From: Jack Schwartz <jack.schwartz@oracle.com>

Remove unused variables: mh_mode_type, mh_width, mh_height, mh_depth

Signed-off-by: Jack Schwartz <jack.schwartz@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Reviewed-by: Prasad J Pandit <pjp@fedoraproject.org>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 hw/i386/multiboot.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/hw/i386/multiboot.c b/hw/i386/multiboot.c
index bb8d8e4629..7d59cbe523 100644
--- a/hw/i386/multiboot.c
+++ b/hw/i386/multiboot.c
@@ -255,12 +255,6 @@ int load_multiboot(FWCfgState *fw_cfg,
             mb_kernel_size = mb_load_size;
         }
 
-        /* Valid if mh_flags sets MULTIBOOT_HEADER_HAS_VBE.
-        uint32_t mh_mode_type = ldl_p(header+i+32);
-        uint32_t mh_width = ldl_p(header+i+36);
-        uint32_t mh_height = ldl_p(header+i+40);
-        uint32_t mh_depth = ldl_p(header+i+44); */
-
         mb_debug("multiboot: mh_header_addr = %#x\n", mh_header_addr);
         mb_debug("multiboot: mh_load_addr = %#x\n", mh_load_addr);
         mb_debug("multiboot: mh_load_end_addr = %#x\n", mh_load_end_addr);
-- 
2.13.6

^ permalink raw reply related	[flat|nested] 6+ messages in thread

* [Qemu-devel] [PULL 3/4] multiboot: Use header names when displaying fields
  2018-03-07 11:18 [Qemu-devel] [PULL 0/4] Multiboot patches Kevin Wolf
  2018-03-07 11:18 ` [Qemu-devel] [PULL 1/4] multiboot: bss_end_addr can be zero Kevin Wolf
  2018-03-07 11:18 ` [Qemu-devel] [PULL 2/4] multiboot: Remove unused variables from multiboot.c Kevin Wolf
@ 2018-03-07 11:18 ` Kevin Wolf
  2018-03-07 11:18 ` [Qemu-devel] [PULL 4/4] multiboot: fprintf(stderr...) -> error_report() Kevin Wolf
  2018-03-08 11:26 ` [Qemu-devel] [PULL 0/4] Multiboot patches Peter Maydell
  4 siblings, 0 replies; 6+ messages in thread
From: Kevin Wolf @ 2018-03-07 11:18 UTC (permalink / raw)
  To: qemu-devel; +Cc: kwolf, jack.schwartz

From: Jack Schwartz <jack.schwartz@oracle.com>

Refer to field names when displaying fields in printf and debug statements.

Signed-off-by: Jack Schwartz <jack.schwartz@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 hw/i386/multiboot.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/hw/i386/multiboot.c b/hw/i386/multiboot.c
index 7d59cbe523..07fdccb84a 100644
--- a/hw/i386/multiboot.c
+++ b/hw/i386/multiboot.c
@@ -224,7 +224,7 @@ int load_multiboot(FWCfgState *fw_cfg,
 
         mh_load_addr = ldl_p(header+i+16);
         if (mh_header_addr < mh_load_addr) {
-            fprintf(stderr, "invalid mh_load_addr address\n");
+            fprintf(stderr, "invalid load_addr address\n");
             exit(1);
         }
 
@@ -234,7 +234,7 @@ int load_multiboot(FWCfgState *fw_cfg,
 
         if (mh_load_end_addr) {
             if (mh_load_end_addr < mh_load_addr) {
-                fprintf(stderr, "invalid mh_load_end_addr address\n");
+                fprintf(stderr, "invalid load_end_addr address\n");
                 exit(1);
             }
             mb_load_size = mh_load_end_addr - mh_load_addr;
@@ -247,7 +247,7 @@ int load_multiboot(FWCfgState *fw_cfg,
         }
         if (mh_bss_end_addr) {
             if (mh_bss_end_addr < (mh_load_addr + mb_load_size)) {
-                fprintf(stderr, "invalid mh_bss_end_addr address\n");
+                fprintf(stderr, "invalid bss_end_addr address\n");
                 exit(1);
             }
             mb_kernel_size = mh_bss_end_addr - mh_load_addr;
@@ -255,10 +255,10 @@ int load_multiboot(FWCfgState *fw_cfg,
             mb_kernel_size = mb_load_size;
         }
 
-        mb_debug("multiboot: mh_header_addr = %#x\n", mh_header_addr);
-        mb_debug("multiboot: mh_load_addr = %#x\n", mh_load_addr);
-        mb_debug("multiboot: mh_load_end_addr = %#x\n", mh_load_end_addr);
-        mb_debug("multiboot: mh_bss_end_addr = %#x\n", mh_bss_end_addr);
+        mb_debug("multiboot: header_addr = %#x\n", mh_header_addr);
+        mb_debug("multiboot: load_addr = %#x\n", mh_load_addr);
+        mb_debug("multiboot: load_end_addr = %#x\n", mh_load_end_addr);
+        mb_debug("multiboot: bss_end_addr = %#x\n", mh_bss_end_addr);
         mb_debug("qemu: loading multiboot kernel (%#x bytes) at %#x\n",
                  mb_load_size, mh_load_addr);
 
@@ -361,7 +361,7 @@ int load_multiboot(FWCfgState *fw_cfg,
     stl_p(bootinfo + MBI_BOOT_DEVICE, 0x8000ffff); /* XXX: use the -boot switch? */
     stl_p(bootinfo + MBI_MMAP_ADDR,   ADDR_E820_MAP);
 
-    mb_debug("multiboot: mh_entry_addr = %#x\n", mh_entry_addr);
+    mb_debug("multiboot: entry_addr = %#x\n", mh_entry_addr);
     mb_debug("           mb_buf_phys   = "TARGET_FMT_plx"\n", mbs.mb_buf_phys);
     mb_debug("           mod_start     = "TARGET_FMT_plx"\n", mbs.mb_buf_phys + mbs.offset_mods);
     mb_debug("           mb_mods_count = %d\n", mbs.mb_mods_count);
-- 
2.13.6

^ permalink raw reply related	[flat|nested] 6+ messages in thread

* [Qemu-devel] [PULL 4/4] multiboot: fprintf(stderr...) -> error_report()
  2018-03-07 11:18 [Qemu-devel] [PULL 0/4] Multiboot patches Kevin Wolf
                   ` (2 preceding siblings ...)
  2018-03-07 11:18 ` [Qemu-devel] [PULL 3/4] multiboot: Use header names when displaying fields Kevin Wolf
@ 2018-03-07 11:18 ` Kevin Wolf
  2018-03-08 11:26 ` [Qemu-devel] [PULL 0/4] Multiboot patches Peter Maydell
  4 siblings, 0 replies; 6+ messages in thread
From: Kevin Wolf @ 2018-03-07 11:18 UTC (permalink / raw)
  To: qemu-devel; +Cc: kwolf, jack.schwartz

From: Jack Schwartz <jack.schwartz@oracle.com>

Change all fprintf(stderr...) calls in hw/i386/multiboot.c to call
error_report() instead, including the mb_debug macro.  Remove the "\n"
from strings passed to all modified calls, since error_report() appends
one.

Signed-off-by: Jack Schwartz <jack.schwartz@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 hw/i386/multiboot.c | 55 ++++++++++++++++++++++++++++-------------------------
 1 file changed, 29 insertions(+), 26 deletions(-)

diff --git a/hw/i386/multiboot.c b/hw/i386/multiboot.c
index 07fdccb84a..b9064264d8 100644
--- a/hw/i386/multiboot.c
+++ b/hw/i386/multiboot.c
@@ -31,12 +31,13 @@
 #include "hw/loader.h"
 #include "elf.h"
 #include "sysemu/sysemu.h"
+#include "qemu/error-report.h"
 
 /* Show multiboot debug output */
 //#define DEBUG_MULTIBOOT
 
 #ifdef DEBUG_MULTIBOOT
-#define mb_debug(a...) fprintf(stderr, ## a)
+#define mb_debug(a...) error_report(a)
 #else
 #define mb_debug(a...)
 #endif
@@ -137,7 +138,7 @@ static void mb_add_mod(MultibootState *s,
     stl_p(p + MB_MOD_END,     end);
     stl_p(p + MB_MOD_CMDLINE, cmdline_phys);
 
-    mb_debug("mod%02d: "TARGET_FMT_plx" - "TARGET_FMT_plx"\n",
+    mb_debug("mod%02d: "TARGET_FMT_plx" - "TARGET_FMT_plx,
              s->mb_mods_count, start, end);
 
     s->mb_mods_count++;
@@ -179,12 +180,12 @@ int load_multiboot(FWCfgState *fw_cfg,
     if (!is_multiboot)
         return 0; /* no multiboot */
 
-    mb_debug("qemu: I believe we found a multiboot image!\n");
+    mb_debug("qemu: I believe we found a multiboot image!");
     memset(bootinfo, 0, sizeof(bootinfo));
     memset(&mbs, 0, sizeof(mbs));
 
     if (flags & 0x00000004) { /* MULTIBOOT_HEADER_HAS_VBE */
-        fprintf(stderr, "qemu: multiboot knows VBE. we don't.\n");
+        error_report("qemu: multiboot knows VBE. we don't.");
     }
     if (!(flags & 0x00010000)) { /* MULTIBOOT_HEADER_HAS_ADDR */
         uint64_t elf_entry;
@@ -193,7 +194,7 @@ int load_multiboot(FWCfgState *fw_cfg,
         fclose(f);
 
         if (((struct elf64_hdr*)header)->e_machine == EM_X86_64) {
-            fprintf(stderr, "Cannot load x86-64 image, give a 32bit one.\n");
+            error_report("Cannot load x86-64 image, give a 32bit one.");
             exit(1);
         }
 
@@ -201,7 +202,7 @@ int load_multiboot(FWCfgState *fw_cfg,
                                &elf_low, &elf_high, 0, I386_ELF_MACHINE,
                                0, 0);
         if (kernel_size < 0) {
-            fprintf(stderr, "Error while loading elf kernel\n");
+            error_report("Error while loading elf kernel");
             exit(1);
         }
         mh_load_addr = elf_low;
@@ -210,12 +211,13 @@ int load_multiboot(FWCfgState *fw_cfg,
 
         mbs.mb_buf = g_malloc(mb_kernel_size);
         if (rom_copy(mbs.mb_buf, mh_load_addr, mb_kernel_size) != mb_kernel_size) {
-            fprintf(stderr, "Error while fetching elf kernel from rom\n");
+            error_report("Error while fetching elf kernel from rom");
             exit(1);
         }
 
-        mb_debug("qemu: loading multiboot-elf kernel (%#x bytes) with entry %#zx\n",
-                  mb_kernel_size, (size_t)mh_entry_addr);
+        mb_debug("qemu: loading multiboot-elf kernel "
+                 "(%#x bytes) with entry %#zx",
+                 mb_kernel_size, (size_t)mh_entry_addr);
     } else {
         /* Valid if mh_flags sets MULTIBOOT_HEADER_HAS_ADDR. */
         uint32_t mh_header_addr = ldl_p(header+i+12);
@@ -224,7 +226,7 @@ int load_multiboot(FWCfgState *fw_cfg,
 
         mh_load_addr = ldl_p(header+i+16);
         if (mh_header_addr < mh_load_addr) {
-            fprintf(stderr, "invalid load_addr address\n");
+            error_report("invalid load_addr address");
             exit(1);
         }
 
@@ -234,20 +236,20 @@ int load_multiboot(FWCfgState *fw_cfg,
 
         if (mh_load_end_addr) {
             if (mh_load_end_addr < mh_load_addr) {
-                fprintf(stderr, "invalid load_end_addr address\n");
+                error_report("invalid load_end_addr address");
                 exit(1);
             }
             mb_load_size = mh_load_end_addr - mh_load_addr;
         } else {
             if (kernel_file_size < mb_kernel_text_offset) {
-                fprintf(stderr, "invalid kernel_file_size\n");
+                error_report("invalid kernel_file_size");
                 exit(1);
             }
             mb_load_size = kernel_file_size - mb_kernel_text_offset;
         }
         if (mh_bss_end_addr) {
             if (mh_bss_end_addr < (mh_load_addr + mb_load_size)) {
-                fprintf(stderr, "invalid bss_end_addr address\n");
+                error_report("invalid bss_end_addr address");
                 exit(1);
             }
             mb_kernel_size = mh_bss_end_addr - mh_load_addr;
@@ -255,17 +257,17 @@ int load_multiboot(FWCfgState *fw_cfg,
             mb_kernel_size = mb_load_size;
         }
 
-        mb_debug("multiboot: header_addr = %#x\n", mh_header_addr);
-        mb_debug("multiboot: load_addr = %#x\n", mh_load_addr);
-        mb_debug("multiboot: load_end_addr = %#x\n", mh_load_end_addr);
-        mb_debug("multiboot: bss_end_addr = %#x\n", mh_bss_end_addr);
-        mb_debug("qemu: loading multiboot kernel (%#x bytes) at %#x\n",
+        mb_debug("multiboot: header_addr = %#x", mh_header_addr);
+        mb_debug("multiboot: load_addr = %#x", mh_load_addr);
+        mb_debug("multiboot: load_end_addr = %#x", mh_load_end_addr);
+        mb_debug("multiboot: bss_end_addr = %#x", mh_bss_end_addr);
+        mb_debug("qemu: loading multiboot kernel (%#x bytes) at %#x",
                  mb_load_size, mh_load_addr);
 
         mbs.mb_buf = g_malloc(mb_kernel_size);
         fseek(f, mb_kernel_text_offset, SEEK_SET);
         if (fread(mbs.mb_buf, 1, mb_load_size, f) != mb_load_size) {
-            fprintf(stderr, "fread() failed\n");
+            error_report("fread() failed");
             exit(1);
         }
         memset(mbs.mb_buf + mb_load_size, 0, mb_kernel_size - mb_load_size);
@@ -319,10 +321,10 @@ int load_multiboot(FWCfgState *fw_cfg,
             hwaddr c = mb_add_cmdline(&mbs, tmpbuf);
             if ((next_space = strchr(tmpbuf, ' ')))
                 *next_space = '\0';
-            mb_debug("multiboot loading module: %s\n", tmpbuf);
+            mb_debug("multiboot loading module: %s", tmpbuf);
             mb_mod_length = get_image_size(tmpbuf);
             if (mb_mod_length < 0) {
-                fprintf(stderr, "Failed to open file '%s'\n", tmpbuf);
+                error_report("Failed to open file '%s'", tmpbuf);
                 exit(1);
             }
 
@@ -333,7 +335,7 @@ int load_multiboot(FWCfgState *fw_cfg,
             mb_add_mod(&mbs, mbs.mb_buf_phys + offs,
                        mbs.mb_buf_phys + offs + mb_mod_length, c);
 
-            mb_debug("mod_start: %p\nmod_end:   %p\n  cmdline: "TARGET_FMT_plx"\n",
+            mb_debug("mod_start: %p\nmod_end:   %p\n  cmdline: "TARGET_FMT_plx,
                      (char *)mbs.mb_buf + offs,
                      (char *)mbs.mb_buf + offs + mb_mod_length, c);
             initrd_filename = next_initrd+1;
@@ -361,10 +363,11 @@ int load_multiboot(FWCfgState *fw_cfg,
     stl_p(bootinfo + MBI_BOOT_DEVICE, 0x8000ffff); /* XXX: use the -boot switch? */
     stl_p(bootinfo + MBI_MMAP_ADDR,   ADDR_E820_MAP);
 
-    mb_debug("multiboot: entry_addr = %#x\n", mh_entry_addr);
-    mb_debug("           mb_buf_phys   = "TARGET_FMT_plx"\n", mbs.mb_buf_phys);
-    mb_debug("           mod_start     = "TARGET_FMT_plx"\n", mbs.mb_buf_phys + mbs.offset_mods);
-    mb_debug("           mb_mods_count = %d\n", mbs.mb_mods_count);
+    mb_debug("multiboot: entry_addr = %#x", mh_entry_addr);
+    mb_debug("           mb_buf_phys   = "TARGET_FMT_plx, mbs.mb_buf_phys);
+    mb_debug("           mod_start     = "TARGET_FMT_plx,
+             mbs.mb_buf_phys + mbs.offset_mods);
+    mb_debug("           mb_mods_count = %d", mbs.mb_mods_count);
 
     /* save bootinfo off the stack */
     mb_bootinfo_data = g_memdup(bootinfo, sizeof(bootinfo));
-- 
2.13.6

^ permalink raw reply related	[flat|nested] 6+ messages in thread

* Re: [Qemu-devel] [PULL 0/4] Multiboot patches
  2018-03-07 11:18 [Qemu-devel] [PULL 0/4] Multiboot patches Kevin Wolf
                   ` (3 preceding siblings ...)
  2018-03-07 11:18 ` [Qemu-devel] [PULL 4/4] multiboot: fprintf(stderr...) -> error_report() Kevin Wolf
@ 2018-03-08 11:26 ` Peter Maydell
  4 siblings, 0 replies; 6+ messages in thread
From: Peter Maydell @ 2018-03-08 11:26 UTC (permalink / raw)
  To: Kevin Wolf; +Cc: QEMU Developers, jack.schwartz

On 7 March 2018 at 11:18, Kevin Wolf <kwolf@redhat.com> wrote:
> The following changes since commit f32408f3b472a088467474ab152be3b6285b2d7b:
>
>   misc: don't use hwaddr as a type in trace events (2018-03-06 14:24:30 +0000)
>
> are available in the git repository at:
>
>   git://repo.or.cz/qemu/kevin.git tags/for-upstream
>
> for you to fetch changes up to 4b9006a41ea8818f2385ae5228e07f211bb4a33d:
>
>   multiboot: fprintf(stderr...) -> error_report() (2018-03-07 11:53:37 +0100)
>
> ----------------------------------------------------------------
> Multiboot patches
>
> ----------------------------------------------------------------
> Jack Schwartz (4):
>       multiboot: bss_end_addr can be zero
>       multiboot: Remove unused variables from multiboot.c
>       multiboot: Use header names when displaying fields
>       multiboot: fprintf(stderr...) -> error_report()
>
>  hw/i386/multiboot.c | 77 ++++++++++++++++++++++++++---------------------------
>  1 file changed, 38 insertions(+), 39 deletions(-)

Applied, thanks.

-- PMM

^ permalink raw reply	[flat|nested] 6+ messages in thread

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Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
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2018-03-07 11:18 ` [Qemu-devel] [PULL 3/4] multiboot: Use header names when displaying fields Kevin Wolf
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