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efi_loader: Make exposed image loader path absolute

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When loading an efi image, we pass it the location it was loaded from.

On file system backends, there are no relative paths, so we should always
pass in absolute ones. For network paths, we may be relative.

This fixes distro booting with grub2 for me when it fetches the grub2 config
file from the loader partition.

Reported-by: york sun <york.sun@nxp.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexander Graf 2016-07-21 01:44:46 +02:00 committed by Tom Rini
parent e8fb4358c2
commit 492716662f
1 changed files with 6 additions and 1 deletions
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7
cmd/bootefi.c
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@ -290,6 +290,11 @@ void efi_set_bootdev(const char *dev, const char *devnr, const char *path)
/* Patch bootefi_image_path to the target file path */
memset(bootefi_image_path[0].str, 0, sizeof(bootefi_image_path[0].str));
snprintf(devname, sizeof(devname), "%s", path);
if (strcmp(dev, "Net")) {
/* Add leading / to fs paths, because they're absolute */
snprintf(devname, sizeof(devname), "/%s", path);
} else {
snprintf(devname, sizeof(devname), "%s", path);
}
ascii2unicode(bootefi_image_path[0].str, devname);
}