After 78ee4d8b1782445caecce8331e68efe83fc32044 in oe-core
the kernel is an *absolute* symlink in /boot.
Unfortunately this implies the stock images built with OE can not be booted.
The last patch of this commit fixes this issue.

The other patches are fixing build when S!=B, autotools-brokensep and
configure warnings.

Signed-off-by: Andrea Adami <[email protected]>
---
 .../files/0001-kexecboot-fix-build-when-S-B.patch  |  61 ++++++++++
 .../0002-kexecboot-fix-configure-warnings.patch    |  33 +++++
 ...0003-kexecboot-do-not-hardcode-MOUNTPOINT.patch |  97 +++++++++++++++
 ...-workaround-for-absolute-kernel-and-initr.patch | 135 +++++++++++++++++++++
 .../recipes-bsp/kexecboot/kexecboot_0.6.bb         |   9 +-
 5 files changed, 334 insertions(+), 1 deletion(-)
 create mode 100644 
meta-initramfs/recipes-bsp/kexecboot/files/0001-kexecboot-fix-build-when-S-B.patch
 create mode 100644 
meta-initramfs/recipes-bsp/kexecboot/files/0002-kexecboot-fix-configure-warnings.patch
 create mode 100644 
meta-initramfs/recipes-bsp/kexecboot/files/0003-kexecboot-do-not-hardcode-MOUNTPOINT.patch
 create mode 100644 
meta-initramfs/recipes-bsp/kexecboot/files/0004-kexecboot.c-workaround-for-absolute-kernel-and-initr.patch

diff --git 
a/meta-initramfs/recipes-bsp/kexecboot/files/0001-kexecboot-fix-build-when-S-B.patch
 
b/meta-initramfs/recipes-bsp/kexecboot/files/0001-kexecboot-fix-build-when-S-B.patch
new file mode 100644
index 0000000..6d3270f
--- /dev/null
+++ 
b/meta-initramfs/recipes-bsp/kexecboot/files/0001-kexecboot-fix-build-when-S-B.patch
@@ -0,0 +1,61 @@
+From 8519d61a7097498b0ee93fb8dc8262286825f3e5 Mon Sep 17 00:00:00 2001
+From: Andrea Adami <[email protected]>
+Date: Thu, 1 May 2014 23:58:51 +0200
+Subject: [PATCH 1/4] kexecboot: fix build when S != B
+
+* fatal error: ../config.h: No such file or directory
+
+Signed-off-by: Andrea Adami <[email protected]>
+---
+ machine/zaurus.c | 2 +-
+ res/theme-gui.h  | 2 +-
+ res/theme-tui.h  | 4 ++--
+ 3 files changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/machine/zaurus.c b/machine/zaurus.c
+index ea21047..83be13b 100644
+--- a/machine/zaurus.c
++++ b/machine/zaurus.c
+@@ -25,7 +25,7 @@
+  *
+  */
+ 
+-#include "../config.h"
++#include "config.h"
+ 
+ #ifdef USE_ZAURUS
+ 
+diff --git a/res/theme-gui.h b/res/theme-gui.h
+index f8fef7f..79bed39 100644
+--- a/res/theme-gui.h
++++ b/res/theme-gui.h
+@@ -15,7 +15,7 @@
+  *
+  */
+ 
+-#include "../config.h"
++#include "config.h"
+ 
+ #ifdef USE_ICONS
+ /** Icons **/
+diff --git a/res/theme-tui.h b/res/theme-tui.h
+index 94e7693..909be56 100644
+--- a/res/theme-tui.h
++++ b/res/theme-tui.h
+@@ -15,11 +15,11 @@
+  *
+  */
+ 
+-#include "../config.h"
++#include "config.h"
+ 
+ #ifdef USE_TEXTUI
+ /** TEXT UI colors **/
+-#include "../termseq.h"
++#include "termseq.h"
+ 
+ /* Background color pair */
+ #define TUI_CLR_BG            TERM_CSI TERM_BG_BLACK ";" TERM_FG_WHITE 
TERM_SGR
+-- 
+1.9.1
+
diff --git 
a/meta-initramfs/recipes-bsp/kexecboot/files/0002-kexecboot-fix-configure-warnings.patch
 
b/meta-initramfs/recipes-bsp/kexecboot/files/0002-kexecboot-fix-configure-warnings.patch
new file mode 100644
index 0000000..ecf422b
--- /dev/null
+++ 
b/meta-initramfs/recipes-bsp/kexecboot/files/0002-kexecboot-fix-configure-warnings.patch
@@ -0,0 +1,33 @@
+From b8938acc3f1ab35273fa9a2fa7728050ef72ff65 Mon Sep 17 00:00:00 2001
+From: Andrea Adami <[email protected]>
+Date: Fri, 2 May 2014 00:19:24 +0200
+Subject: [PATCH 2/4] kexecboot: fix configure warnings
+
+Makefile.am:5: warning: source file 'fstype/fstype.c' is in a subdirectory,
+Makefile.am:5: but option 'subdir-objects' is disabled
+automake: warning: possible forward-incompatibility.
+...
+Makefile.am:5: warning: source file 'machine/zaurus.c' is in a subdirectory,
+...
+
+Signed-off-by: Andrea Adami <[email protected]>
+---
+ configure.ac | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/configure.ac b/configure.ac
+index 0ca4b81..66ec54e 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -1,7 +1,7 @@
+ AC_PREREQ(2.53)
+ AC_INIT([kexecboot], [0.6], [[email protected]])
+ AC_CANONICAL_HOST
+-AM_INIT_AUTOMAKE([-Wall foreign])
++AM_INIT_AUTOMAKE([-Wall foreign] [subdir-objects])
+ AC_CONFIG_SRCDIR(kexecboot.c)
+ AC_CONFIG_HEADERS(config.h)
+ AM_MAINTAINER_MODE
+-- 
+1.9.1
+
diff --git 
a/meta-initramfs/recipes-bsp/kexecboot/files/0003-kexecboot-do-not-hardcode-MOUNTPOINT.patch
 
b/meta-initramfs/recipes-bsp/kexecboot/files/0003-kexecboot-do-not-hardcode-MOUNTPOINT.patch
new file mode 100644
index 0000000..4caa0d5
--- /dev/null
+++ 
b/meta-initramfs/recipes-bsp/kexecboot/files/0003-kexecboot-do-not-hardcode-MOUNTPOINT.patch
@@ -0,0 +1,97 @@
+From 800dae0d34f8629a34c638a612166b76dda03e27 Mon Sep 17 00:00:00 2001
+From: Andrea Adami <[email protected]>
+Date: Sat, 2 Aug 2014 01:13:08 +0200
+Subject: [PATCH 3/4] kexecboot: do not hardcode MOUNTPOINT
+
+Avoid to hardcode it: could be requested as a new configure option.
+
+Signed-off-by: Andrea Adami <[email protected]>
+---
+ cfgparser.c |  6 +++---
+ kexecboot.c | 18 ++++++++++--------
+ 2 files changed, 13 insertions(+), 11 deletions(-)
+
+diff --git a/cfgparser.c b/cfgparser.c
+index 8f6688c..dec27b1 100644
+--- a/cfgparser.c
++++ b/cfgparser.c
+@@ -141,7 +141,7 @@ static int set_kernel(struct cfgdata_t *cfgdata, char 
*value)
+               return -1;
+       }
+ 
+-      strcpy(sc->kernelpath, "/mnt");
++      strcpy(sc->kernelpath, MOUNTPOINT);
+       strcat(sc->kernelpath, value);
+       return 0;
+ }
+@@ -155,7 +155,7 @@ static int set_icon(struct cfgdata_t *cfgdata, char *value)
+ 
+       dispose(sc->iconpath);
+       /* Add our mountpoint, since the enduser won't know it */
+-      sc->iconpath = malloc(sizeof(MOUNTPOINT)+strlen(value));
++      sc->iconpath = malloc(strlen(MOUNTPOINT)+strlen(value)+1);
+       if (NULL == sc->iconpath) {
+               DPRINTF("Can't allocate memory to store iconpath '%s'", value);
+               return -1;
+@@ -194,7 +194,7 @@ static int set_initrd(struct cfgdata_t *cfgdata, char 
*value)
+               return -1;
+       }
+ 
+-      strcpy(sc->initrd, "/mnt");
++      strcpy(sc->initrd, MOUNTPOINT);
+       strcat(sc->initrd, value);
+       return 0;
+ }
+diff --git a/kexecboot.c b/kexecboot.c
+index d6657a0..7268d6b 100644
+--- a/kexecboot.c
++++ b/kexecboot.c
+@@ -57,20 +57,22 @@
+ #endif
+ 
+ #ifdef USE_MACHINE_KERNEL
+-/* Machine-dependent kernel patch */
++/* Machine-dependent kernel path */
+ char *machine_kernel = NULL;
+ #endif
+ 
++#define PREPEND_MOUNTPATH(string) MOUNTPOINT""string
++
+ /* NULL-terminated array of kernel search paths
+  * First item should be filled with machine-dependent path */
+ char *default_kernels[] = {
+ #ifdef USE_ZIMAGE
+-      "/mnt/boot/zImage",
+-      "/mnt/zImage",
++      PREPEND_MOUNTPATH("/boot/zImage"),
++      PREPEND_MOUNTPATH("/zImage"),
+ #endif
+ #ifdef USE_UIMAGE
+-      "/mnt/boot/uImage",
+-      "/mnt/uImage",
++      PREPEND_MOUNTPATH("/boot/uImage"),
++      PREPEND_MOUNTPATH("/uImage"),
+ #endif
+       NULL
+ };
+@@ -149,14 +151,14 @@ char *get_machine_kernelpath() {
+                       ++tmp;
+               }
+ 
+-              /* Prepend "/mnt/boot/zImage-" to hw */
+-              tmp = malloc(strlen(hw) + 17 + 1);      /* 
strlen("/mnt/boot/zImage-") */
++              /* Prepend  MOUNTPOINT"/boot/zImage-" to hw */
++              tmp = malloc(strlen(PREPEND_MOUNTPATH("/boot/zImage-")) + 
strlen(hw) + 1);
+               if (NULL == tmp) {
+                       DPRINTF("Can't allocate memory for machine-specific 
kernel path");
+                       return NULL;
+               }
+ 
+-              strcpy(tmp, "/mnt/boot/zImage-");
++              strcpy(tmp, PREPEND_MOUNTPATH("/boot/zImage-"));
+               strcat(tmp, hw);
+ 
+               return tmp;
+-- 
+1.9.1
+
diff --git 
a/meta-initramfs/recipes-bsp/kexecboot/files/0004-kexecboot.c-workaround-for-absolute-kernel-and-initr.patch
 
b/meta-initramfs/recipes-bsp/kexecboot/files/0004-kexecboot.c-workaround-for-absolute-kernel-and-initr.patch
new file mode 100644
index 0000000..6d81d83
--- /dev/null
+++ 
b/meta-initramfs/recipes-bsp/kexecboot/files/0004-kexecboot.c-workaround-for-absolute-kernel-and-initr.patch
@@ -0,0 +1,135 @@
+From de9a6284df8add6ec03e1d9981d0b6d0595bbc69 Mon Sep 17 00:00:00 2001
+From: Andrea Adami <[email protected]>
+Date: Mon, 10 Nov 2014 23:37:23 +0100
+Subject: [PATCH 4/4] kexecboot.c: workaround for absolute kernel and initrd
+ symlinks
+
+Add MOUNTPOINT prefix if the kernel/initrd symlinks start with '/'.
+Do nothing if the path is a relative symbolic link or not a symlink.
+
+Fix following situation:
+
+root@mizar:/var/tmp# ls -al boot/
+total 2076
+drwxr-xr-x 2 root root    4096 lug  5 01:38 .
+drwxrwxrwt 4 root root    4096 lug  5 12:26 ..
+-rw-r--r-- 1 root root     831 lug  5 01:24 boot.cfg
+-rw-r--r-- 1 root root    1322 lug  5 01:24 icon.xpm
+lrwxrwxrwx 1 root root      34 lug  5 12:26 zImage ->
+/boot/zImage-3.14.5-yocto-standard
+-rw-r--r-- 1 root root 2106832 lug  5 01:20 zImage-3.14.5-yocto-standard
+
+Cannot open `/mnt/boot/zImage': No such file or directory
+Nothing has been loaded!
+
+Signed-off-by: Andrea Adami <[email protected]>
+---
+ kexecboot.c | 53 ++++++++++++++++++++++++++++++++++++++++++++---------
+ 1 file changed, 44 insertions(+), 9 deletions(-)
+
+diff --git a/kexecboot.c b/kexecboot.c
+index 7268d6b..8a7a7d2 100644
+--- a/kexecboot.c
++++ b/kexecboot.c
+@@ -208,11 +208,16 @@ void start_kernel(struct params_t *params, int choice)
+       const char *load_argv[] = { NULL, "-l", NULL, NULL, NULL, NULL };
+       const char *exec_argv[] = { NULL, "-e", NULL, NULL};
+ 
+-      char *cmdline_arg = NULL, *initrd_arg = NULL;
++      char *cmdline_arg = NULL, *initrd_arg = NULL, *kernel_arg = NULL;
+       int n, idx, u;
+       struct stat sinfo;
+       struct boot_item_t *item;
+ 
++      /* buffer for readlink (could be truncated) */
++      char buf[512];
++      int len;
++
++
+       item = params->bootcfg->list[choice];
+ 
+       exec_argv[0] = kexec_path;
+@@ -306,10 +311,17 @@ void start_kernel(struct params_t *params, int choice)
+               }
+       }
+ 
++      /* Mount boot device */
++      if ( -1 == mount(mount_dev, mount_point, mount_fstype,
++                      MS_RDONLY, NULL) ) {
++              perror("Can't mount boot device");
++              exit(-1);
++      }
++
+       /* fill '--initrd' option */
+       if (item->initrd) {
+               /* allocate space */
+-              n = sizeof(str_initrd_start) + strlen(item->initrd);
++              n = sizeof(str_initrd_start) + strlen(item->initrd) + 1 + 
sizeof(mount_point) + sizeof(buf);
+ 
+               initrd_arg = (char *)malloc(n);
+               if (NULL == initrd_arg) {
+@@ -317,24 +329,46 @@ void start_kernel(struct params_t *params, int choice)
+               } else {
+                       strcpy(initrd_arg, str_initrd_start);   /* --initrd= */
+                       strcat(initrd_arg, item->initrd);
++
++                      if ((len = readlink(item->initrd, buf, sizeof(buf)-1)) 
!= -1) {
++                              buf[len] = '\0';
++                              /* Fix absolute symlinks: prepend MOUNTPOINT */
++                              if (buf[0] == '/') {
++                                      strcpy(initrd_arg, str_initrd_start);   
/* --initrd= */
++                                      strcat(initrd_arg, mount_point);
++                                      strcat(initrd_arg, buf);
++                              }
++                      }
+                       load_argv[idx] = initrd_arg;
+                       ++idx;
+               }
+       }
+ 
+       /* Append kernelpath as last arg of kexec */
+-      load_argv[idx] = item->kernelpath;
++              /* allocate space */
++              n = strlen(item->kernelpath) + 1 + sizeof(mount_point) + 
sizeof(buf);
++
++              kernel_arg = (char *)malloc(n);
++              if (NULL == kernel_arg) {
++                      perror("Can't allocate memory for kernel_arg");
++              } else {
++                      strcpy(kernel_arg, item->kernelpath);
++
++                      if ((len = readlink(item->kernelpath, buf, 
sizeof(buf)-1)) != -1) {
++                              buf[len] = '\0';
++                              /* Fix absolute symlinks: prepend MOUNTPOINT */
++                              if (buf[0] == '/') {
++                                      strcpy(kernel_arg, mount_point);
++                                      strcat(kernel_arg, buf);
++                              }
++                      }
++                      load_argv[idx] = kernel_arg;
++              }
+ 
+       DPRINTF("load_argv: %s, %s, %s, %s, %s", load_argv[0],
+                       load_argv[1], load_argv[2],
+                       load_argv[3], load_argv[4]);
+ 
+-      /* Mount boot device */
+-      if ( -1 == mount(mount_dev, mount_point, mount_fstype,
+-                      MS_RDONLY, NULL) ) {
+-              perror("Can't mount boot device");
+-              exit(-1);
+-      }
+ 
+       /* Load kernel */
+       n = fexecw(kexec_path, (char *const *)load_argv, envp);
+@@ -347,6 +381,7 @@ void start_kernel(struct params_t *params, int choice)
+ 
+       dispose(cmdline_arg);
+       dispose(initrd_arg);
++      dispose(kernel_arg);
+ 
+       /* Check /proc/sys/net presence */
+       if ( -1 == stat("/proc/sys/net", &sinfo) ) {
+-- 
+1.9.1
+
diff --git a/meta-initramfs/recipes-bsp/kexecboot/kexecboot_0.6.bb 
b/meta-initramfs/recipes-bsp/kexecboot/kexecboot_0.6.bb
index 1fb5f0d..9061c27 100644
--- a/meta-initramfs/recipes-bsp/kexecboot/kexecboot_0.6.bb
+++ b/meta-initramfs/recipes-bsp/kexecboot/kexecboot_0.6.bb
@@ -42,7 +42,14 @@ SRC_URI = 
"https://github.com/kexecboot/kexecboot/archive/v${PV}.tar.gz";
 SRC_URI[md5sum] = "46b7c1a6f20531be56445ebb8669a2b8"
 SRC_URI[sha256sum] = 
"6b360b8aa59bc5d68a96705349a0dd416f8ed704e931fa0ac7849298258f0f15"
 
-inherit autotools-brokensep
+SRC_URI += "\
+            file://0001-kexecboot-fix-build-when-S-B.patch \
+            file://0002-kexecboot-fix-configure-warnings.patch \
+            file://0003-kexecboot-do-not-hardcode-MOUNTPOINT.patch \
+            
file://0004-kexecboot.c-workaround-for-absolute-kernel-and-initr.patch \
+            "
+
+inherit autotools
 
 EXTRA_OECONF = "--enable-delay=2 --enable-evdev-rate=1000,250"
 
-- 
1.9.1

-- 
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