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| author | Glenn Washburn <development@efficientek.com> | 2022-03-18 01:34:05 -0500 |
|---|---|---|
| committer | Daniel Kiper <daniel.kiper@oracle.com> | 2022-04-04 18:17:44 +0200 |
| commit | b0da8d3d35162de9f39ed667a85623632900faa3 (patch) | |
| tree | c4ca32e4af3a91cbd1704722228e3853f2b3405c | |
| parent | 66533438810bd4d00520bd65a0d47b33b5929274 (diff) | |
| download | grub-b0da8d3d35162de9f39ed667a85623632900faa3.tar.gz | |
gdb: Add malloc and free symbols to kernel.exec to improve gdb functionality
Add linker flags when linking kernel.exec to have malloc and free point to
grub_malloc() and grub_free() respectively. Some gdb functionality depends on
gdb locating the symbols "malloc" and "free", such as dynamically creating
strings for arguments to injected function calls. A trivial example would
the gdb command 'p strlen("astring")'. Make sure not to do this on emu
platforms, or an infinite loop occurs because emu has a special
grub_malloc() that calls malloc().
Signed-off-by: Glenn Washburn <development@efficientek.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
| -rw-r--r-- | conf/Makefile.common | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/conf/Makefile.common b/conf/Makefile.common index b343a038e..2d8f1bf2e 100644 --- a/conf/Makefile.common +++ b/conf/Makefile.common @@ -39,6 +39,13 @@ LDFLAGS_KERNEL = $(LDFLAGS_PLATFORM) -nostdlib $(TARGET_LDFLAGS_OLDMAGIC) CPPFLAGS_KERNEL = $(CPPFLAGS_CPU) $(CPPFLAGS_PLATFORM) -DGRUB_KERNEL=1 CCASFLAGS_KERNEL = $(CCASFLAGS_CPU) $(CCASFLAGS_PLATFORM) STRIPFLAGS_KERNEL = -R .rel.dyn -R .reginfo -R .note -R .comment -R .drectve -R .note.gnu.gold-version -R .MIPS.abiflags -R .ARM.exidx +if !COND_emu +if COND_HAVE_ASM_USCORE + LDFLAGS_KERNEL += -Wl,--defsym=_malloc=_grub_malloc -Wl,--defsym=_free=_grub_free +else + LDFLAGS_KERNEL += -Wl,--defsym=malloc=grub_malloc -Wl,--defsym=free=grub_free +endif +endif CFLAGS_MODULE = $(CFLAGS_PLATFORM) -ffreestanding LDFLAGS_MODULE = $(LDFLAGS_PLATFORM) -nostdlib $(TARGET_LDFLAGS_OLDMAGIC) -Wl,-r |