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| author |   Jiri Olsa <jolsa@redhat.com> | 2021-07-14 11:43:53 +0200 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2021-07-15 17:16:06 -0700 |
| commit | 7e6f3cd89f04a0a577002d5696288b482109d25c (patch) | |
| tree | dd610c2eeeeab77706fdbe55b881323d4b01dc9e /include/linux/filter.h | |
| parent | Merge branch 'bpf-timers' (diff) | |
| download | wireguard-linux-7e6f3cd89f04a0a577002d5696288b482109d25c.tar.xz wireguard-linux-7e6f3cd89f04a0a577002d5696288b482109d25c.zip | |
bpf, x86: Store caller's ip in trampoline stack
Storing caller's ip in trampoline's stack. Trampoline programs
can reach the IP in (ctx - 8) address, so there's no change in
program's arguments interface.
The IP address is takes from [fp + 8], which is return address
from the initial 'call fentry' call to trampoline.
This IP address will be returned via bpf_get_func_ip helper
helper, which is added in following patches.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20210714094400.396467-2-jolsa@kernel.org
Diffstat (limited to 'include/linux/filter.h')
0 files changed, 0 insertions, 0 deletions