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| author |   David Rivshin <DRivshin@allworx.com> | 2018-04-25 21:15:01 +0100 |
|---|---|---|
| committer |   Russell King <rmk+kernel@armlinux.org.uk> | 2018-05-19 11:53:46 +0100 |
| commit | 76ed0b803a2ab793a1b27d1dfe0de7955282cd34 (patch) | |
| tree | c9b84538f7ffcc20207fd8c4ef5cd2a41cb8244d | |
| parent | ARM: 8763/1: dma-mapping: Use vma_pages() (diff) | |
| download | linux-dev-76ed0b803a2ab793a1b27d1dfe0de7955282cd34.tar.xz linux-dev-76ed0b803a2ab793a1b27d1dfe0de7955282cd34.zip | |
ARM: 8764/1: kgdb: fix NUMREGBYTES so that gdb_regs[] is the correct size
NUMREGBYTES (which is used as the size for gdb_regs[]) is incorrectly
based on DBG_MAX_REG_NUM instead of GDB_MAX_REGS. DBG_MAX_REG_NUM
is the number of total registers, while GDB_MAX_REGS is the number
of 'unsigned longs' it takes to serialize those registers. Since
FP registers require 3 'unsigned longs' each, DBG_MAX_REG_NUM is
smaller than GDB_MAX_REGS.
This causes GDB 8.0 give the following error on connect:
"Truncated register 19 in remote 'g' packet"
This also causes the register serialization/deserialization logic
to overflow gdb_regs[], overwriting whatever follows.
Fixes: 834b2964b7ab ("kgdb,arm: fix register dump")
Cc: <stable@vger.kernel.org> # 2.6.37+
Signed-off-by: David Rivshin <drivshin@allworx.com>
Acked-by: Rabin Vincent <rabin@rab.in>
Tested-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
| -rw-r--r-- | arch/arm/include/asm/kgdb.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/include/asm/kgdb.h b/arch/arm/include/asm/kgdb.h index 3b73fdcf3627..8de1100d1067 100644 --- a/arch/arm/include/asm/kgdb.h +++ b/arch/arm/include/asm/kgdb.h @@ -77,7 +77,7 @@ extern int kgdb_fault_expected; #define KGDB_MAX_NO_CPUS 1 #define BUFMAX 400 -#define NUMREGBYTES (DBG_MAX_REG_NUM << 2) +#define NUMREGBYTES (GDB_MAX_REGS << 2) #define NUMCRITREGBYTES (32 << 2) #define _R0 0 |