objtool: Validate disassembler headers in libopcodes probegrafted

commit 3f2de814c059 ("objtool: Fix libopcodes linking with static libraries")
tested for libopcodes availability by linking a test snippet with a forward
declaration of disassemble_init_for_target().

However, testing symbol linkage with an extern declaration only verifies
the presence of the library (.so/.a) and bypasses checking for development
headers (binutils-dev). On systems where libopcodes is present without
development headers installed, the probe succeeds, enabling BUILD_DISAS.
Subsequent compilation of objtool then fails:

  fatal error: 'bfd.h' file not found
    113 | #include <bfd.h>

Additionally, the probe invokes $(HOSTCC) without $(HOSTCFLAGS), ignoring
any sysroot or include flags specified for the host compiler.

Fix this by including <bfd.h> and <dis-asm.h> directly in the test snippet,
passing $(HOSTCFLAGS) so host compiler options are respected, and defining
PACKAGE="objtool" to satisfy the configuration check in <bfd.h>.

Fixes: 3f2de814c059 ("objtool: Fix libopcodes linking with static libraries")
Fixes: 436326bc525d ("objtool: fix build failure due to missing libopcodes check")
Reported-by: Alice Ryhl <aliceryhl@google.com>
Assisted-by: Antigravity:Gemini-Next
Signed-off-by: Ulises Mendez Martinez <umendez@google.com>
Link: https://patch.msgid.link/20260904150710.2997558-1-umendez@google.com
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>

1 files changed, 159 insertions, 0 deletions

diff --git a/lib/fonts/Kconfig b/lib/fonts/Kconfig
new file mode 100644
index 000000000..7d03823e4
--- /dev/null
+++ b/lib/fonts/Kconfig
@@ -0,0 +1,159 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Font configuration
+#
+
+config FONT_SUPPORT
+	tristate
+
+if FONT_SUPPORT
+
+config FONTS
+	bool "Select compiled-in fonts"
+	depends on FRAMEBUFFER_CONSOLE || STI_CONSOLE || DRM_PANIC || DRM_CLIENT_LOG
+	help
+	  Say Y here if you would like to use fonts other than the default
+	  your frame buffer console usually use.
+
+	  Note that the answer to this question won't directly affect the
+	  kernel: saying N will just cause the configurator to skip all
+	  the questions about foreign fonts.
+
+	  If unsure, say N (the default choices are safe).
+
+config FONT_8x8
+	bool "VGA 8x8 font" if FONTS
+	depends on FRAMEBUFFER_CONSOLE || STI_CONSOLE || DRM_PANIC
+	default y if !SPARC && !FONTS
+	help
+	  This is the "high resolution" font for the VGA frame buffer (the one
+	  provided by the text console 80x50 (and higher) modes).
+
+	  Note that this is a poor quality font. The VGA 8x16 font is quite a
+	  lot more readable.
+
+	  Given the resolution provided by the frame buffer device, answer N
+	  here is safe.
+
+config FONT_8x16
+	bool "VGA 8x16 font" if FONTS
+	default y if !SPARC && !FONTS
+	help
+	  This is the "high resolution" font for the VGA frame buffer (the one
+	  provided by the VGA text console 80x25 mode.
+
+	  If unsure, say Y.
+
+config FONT_6x11
+	bool "Mac console 6x11 font (not supported by all drivers)" if FONTS
+	depends on FRAMEBUFFER_CONSOLE || STI_CONSOLE || DRM_PANIC
+	default y if !SPARC && !FONTS && MAC
+	help
+	  Small console font with Macintosh-style high-half glyphs.  Some Mac
+	  framebuffer drivers don't support this one at all.
+
+config FONT_7x14
+	bool "console 7x14 font (not supported by all drivers)" if FONTS
+	depends on FRAMEBUFFER_CONSOLE || DRM_PANIC
+	help
+	  Console font with characters just a bit smaller than the default.
+	  If the standard 8x16 font is a little too big for you, say Y.
+	  Otherwise, say N.
+
+config FONT_PEARL_8x8
+	bool "Pearl (old m68k) console 8x8 font" if FONTS
+	depends on FRAMEBUFFER_CONSOLE || DRM_PANIC
+	default y if !SPARC && !FONTS && AMIGA
+	help
+	  Small console font with PC-style control-character and high-half
+	  glyphs.
+
+config FONT_ACORN_8x8
+	bool "Acorn console 8x8 font" if FONTS
+	depends on FRAMEBUFFER_CONSOLE || DRM_PANIC
+	default y if !SPARC && !FONTS && ARM && ARCH_ACORN
+	help
+	  Small console font with PC-style control characters and high-half
+	  glyphs.
+
+config FONT_MINI_4x6
+	bool "Mini 4x6 font"
+	depends on !SPARC && FONTS
+
+config FONT_6x10
+	bool "Medium-size 6x10 font"
+	depends on !SPARC && FONTS
+	help
+	  Medium-size console font. Suitable for framebuffer consoles on
+	  embedded devices with a 320x240 screen, to get a reasonable number
+	  of characters (53x24) that are still at a readable size.
+
+config FONT_10x18
+	bool "console 10x18 font (not supported by all drivers)" if FONTS
+	depends on FRAMEBUFFER_CONSOLE || DRM_PANIC
+	help
+	  This is a high resolution console font for machines with very
+	  big letters. It fits between the sun 12x22 and the normal 8x16 font.
+	  If other fonts are too big or too small for you, say Y, otherwise say N.
+
+config FONT_SUN8x16
+	bool "Sparc console 8x16 font"
+	depends on (FRAMEBUFFER_CONSOLE && (FONTS || SPARC)) || \
+		   BOOTX_TEXT || EARLYFB
+	help
+	  This is the high resolution console font for Sun machines. Say Y.
+
+config FONT_SUN12x22
+	bool "Sparc console 12x22 font (not supported by all drivers)"
+	depends on FRAMEBUFFER_CONSOLE || DRM_PANIC
+	depends on !SPARC && FONTS
+	help
+	  This is the high resolution console font for Sun machines with very
+	  big letters (like the letters used in the SPARC PROM). If the
+	  standard font is unreadable for you, say Y, otherwise say N.
+
+config FONT_TER10x18
+	bool "Terminus 10x18 font (not supported by all drivers)"
+	depends on FRAMEBUFFER_CONSOLE || DRM_PANIC
+	depends on !SPARC && FONTS || SPARC
+	help
+	  Terminus Font is a clean, fixed width bitmap font, designed
+	  for long (8 and more hours per day) work with computers.
+	  This is the high resolution version made for use with 13-16" laptops.
+	  It fits between the normal 8x16 font and Terminus 16x32.
+	  If other fonts are unreadable for you, say Y, otherwise say N.
+
+config FONT_TER16x32
+	bool "Terminus 16x32 font (not supported by all drivers)"
+	depends on FRAMEBUFFER_CONSOLE || DRM_PANIC
+	depends on !SPARC && FONTS || SPARC
+	help
+	  Terminus Font is a clean, fixed width bitmap font, designed
+	  for long (8 and more hours per day) work with computers.
+	  This is the high resolution, large version for use with HiDPI screens.
+	  If the standard font is unreadable for you, say Y, otherwise say N.
+
+config FONT_6x8
+	bool "OLED 6x8 font" if FONTS
+	depends on FRAMEBUFFER_CONSOLE || DRM_PANIC
+	help
+	  This font is useful for small displays (OLED).
+
+config FONT_AUTOSELECT
+	def_bool y
+	depends on !FONT_8x8
+	depends on !FONT_6x11
+	depends on !FONT_7x14
+	depends on !FONT_PEARL_8x8
+	depends on !FONT_ACORN_8x8
+	depends on !FONT_MINI_4x6
+	depends on !FONT_6x10
+	depends on !FONT_SUN8x16
+	depends on !FONT_SUN12x22
+	depends on !FONT_10x18
+	depends on !FONT_TER10x18
+	depends on !FONT_TER16x32
+	depends on !FONT_6x8
+	select FONT_8x16
+
+endif # FONT_SUPPORT