kernel/linux.git - Linux kernel stable tree (mirror)

Age	Commit message (Collapse)	Author	Files	Lines
11 days	LoongArch: Make the users of larch_insn_gen_break() constant	Oleg Nesterov	1	-2/+2
	LoongArch defines UPROBE_SWBP_INSN as a function call and this breaks arch_uprobe_trampoline() which uses it to initialize a static variable. Add the new "__builtin_constant_p" helper, __emit_break(), and redefine the current users of larch_insn_gen_break() to use it. Fixes: ff474a78cef5 ("uprobe: Add uretprobe syscall to speed up return probe") Reported-by: Nathan Chancellor <nathan@kernel.org> Closes: https://lore.kernel.org/all/20240614174822.GA1185149@thelio-3990X/ Suggested-by: Andrii Nakryiko <andrii@kernel.org> Tested-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-06-29	LoongArch: Add uprobes support	Tiezhu Yang	1	-0/+36
	Uprobes is the user-space counterpart to kprobes, this patch adds uprobes support for LoongArch. Here is a simple example with CONFIG_UPROBE_EVENTS=y: # cat test.c #include <stdio.h> int add(int a, int b) { return a + b; } int main() { return add(2, 7); } # gcc test.c -o /tmp/test # nm /tmp/test \| grep add 0000000120004194 T add # cd /sys/kernel/debug/tracing # echo > uprobe_events # echo "p:myuprobe /tmp/test:0x4194 %r4 %r5" > uprobe_events # echo "r:myuretprobe /tmp/test:0x4194 %r4" >> uprobe_events # echo 1 > events/uprobes/enable # echo 1 > tracing_on # /tmp/test # cat trace ... # TASK-PID CPU# \|\|\|\|\| TIMESTAMP FUNCTION # \| \| \| \|\|\|\|\| \| \| test-1060 [001] DNZff 1015.770620: myuprobe: (0x120004194) arg1=0x2 arg2=0x7 test-1060 [001] DNZff 1015.770930: myuretprobe: (0x1200041f0 <- 0x120004194) arg1=0x9 Tested-by: Jeff Xie <xiehuan09@gmail.com> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>