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[PATCH] gdb: Add malloc and free symbols to kernel.exec to improve gdb f
From: |
Glenn Washburn |
Subject: |
[PATCH] gdb: Add malloc and free symbols to kernel.exec to improve gdb functionality |
Date: |
Wed, 2 Mar 2022 18:25:12 -0600 |
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")'.
Signed-off-by: Glenn Washburn <development@efficientek.com>
---
This should have been included in the gdb patch series I recently sent,
although its not required by nor requires any of those patches.
Glenn
---
conf/Makefile.common | 1 +
1 file changed, 1 insertion(+)
diff --git a/conf/Makefile.common b/conf/Makefile.common
index f0bb6e160a..069b428c1a 100644
--- a/conf/Makefile.common
+++ b/conf/Makefile.common
@@ -36,6 +36,7 @@ BUILD_CPPFLAGS += $(CPPFLAGS_DEFAULT)
CFLAGS_KERNEL = $(CFLAGS_PLATFORM) -ffreestanding
LDFLAGS_KERNEL = $(LDFLAGS_PLATFORM) -nostdlib $(TARGET_LDFLAGS_OLDMAGIC)
+LDFLAGS_KERNEL += -Wl,--defsym=malloc=grub_malloc -Wl,--defsym=free=grub_free
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
--
2.27.0
- [PATCH] gdb: Add malloc and free symbols to kernel.exec to improve gdb functionality,
Glenn Washburn <=
- Re: [PATCH] gdb: Add malloc and free symbols to kernel.exec to improve gdb functionality, Daniel Kiper, 2022/03/09
- Re: [PATCH] gdb: Add malloc and free symbols to kernel.exec to improve gdb functionality, Glenn Washburn, 2022/03/09
- Re: [PATCH] gdb: Add malloc and free symbols to kernel.exec to improve gdb functionality, Daniel Kiper, 2022/03/10
- Re: [PATCH] gdb: Add malloc and free symbols to kernel.exec to improve gdb functionality, Daniel Kiper, 2022/03/15
- Re: [PATCH] gdb: Add malloc and free symbols to kernel.exec to improve gdb functionality, Glenn Washburn, 2022/03/15
- Re: [PATCH] gdb: Add malloc and free symbols to kernel.exec to improve gdb functionality, Daniel Kiper, 2022/03/16
- Re: [PATCH] gdb: Add malloc and free symbols to kernel.exec to improve gdb functionality, Glenn Washburn, 2022/03/18
- Re: [PATCH] gdb: Add malloc and free symbols to kernel.exec to improve gdb functionality, Daniel Kiper, 2022/03/22