linux.git/arch/csky/kernel/process.c, branch v5.6 Linux kernel source tree csky: Implement copy_thread_tls 2020-02-21T07:43:25+00:00 Guo Ren guoren@linux.alibaba.com 2020-02-12T02:24:52+00:00 0b9f386c4be6493d282aab0af6f9b70c62142777 This is required for clone3 which passes the TLS value through a struct rather than a register. Cc: Amanieu d'Antras <amanieu@gmail.com> Signed-off-by: Guo Ren <guoren@linux.alibaba.com> 
This is required for clone3 which passes the TLS value through a
struct rather than a register.

Cc: Amanieu d'Antras <amanieu@gmail.com>
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
csky: Initial stack protector support 2020-02-21T07:43:24+00:00 Mao Han han_mao@c-sky.com 2019-10-11T02:56:55+00:00 2f78c73f78c39dabc5c44ad8dd61fd6ec65636d6 This is a basic -fstack-protector support without per-task canary switching. The protector will report something like when stack corruption is detected: It's tested with strcpy local array overflow in sys_kill and get: stack-protector: Kernel stack is corrupted in: sys_kill+0x23c/0x23c TODO: - Support task switch for different cannary Signed-off-by: Mao Han <han_mao@c-sky.com> Signed-off-by: Guo Ren <guoren@linux.alibaba.com> 
This is a basic -fstack-protector support without per-task canary
switching. The protector will report something like when stack
corruption is detected:

It's tested with strcpy local array overflow in sys_kill and get:
stack-protector: Kernel stack is corrupted in: sys_kill+0x23c/0x23c

TODO:
 - Support task switch for different cannary

Signed-off-by: Mao Han <han_mao@c-sky.com>
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
csky: Fixup add zero_fp fixup perf backtrace panic 2019-09-30T02:26:32+00:00 Guo Ren ren_guo@c-sky.com 2019-09-25T11:56:16+00:00 48ede51fd94fe9251058fc85626b2aeb5cbb5884 We need set fp zero to let backtrace know the end. The patch fixup perf callchain panic problem, because backtrace didn't know what is the end of fp. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Reported-by: Mao Han <han_mao@c-sky.com> 
We need set fp zero to let backtrace know the end. The patch fixup perf
callchain panic problem, because backtrace didn't know what is the end
of fp.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Reported-by: Mao Han <han_mao@c-sky.com>
csky: stacktrace supported. 2018-12-31T15:12:22+00:00 Guo Ren ren_guo@c-sky.com 2018-12-09T06:18:05+00:00 0ea2dc7cd668be5475babecaf6fdeaa464e2847b The gcc option "-mbacktrace" will push fp(r8),lr into stack and we could unwind the stack with: fp = *fp lr = (unsigned int *)fp[1] Signed-off-by: Guo Ren <ren_guo@c-sky.com> 
The gcc option "-mbacktrace" will push fp(r8),lr into stack and we could
unwind the stack with:
	fp = *fp
	lr = (unsigned int *)fp[1]

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
csky: Process management and Signal 2018-10-25T16:54:13+00:00 Guo Ren ren_guo@c-sky.com 2018-09-05T06:25:14+00:00 e9564df753fd547fcbcd4fd10015c3b1213ef452 This patch adds files related to task_switch, sigcontext, signal, fpu context switch. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Eric W. Biederman <ebiederm@xmission.com> 
This patch adds files related to task_switch, sigcontext, signal,
fpu context switch.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Eric W. Biederman <ebiederm@xmission.com>