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author | Ahmad Fatoum <ahmad@a3f.at> | 2020-09-14 15:37:47 +0200 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2020-09-15 14:24:28 +0200 |
commit | 242d9e7531fbc394214d2a54d3ff56a5690f397a (patch) | |
tree | 07ebc3ab16aa0525a29f9cbabfc29d79f88c4f7b /arch/sandbox/Kconfig | |
parent | 65ca0db25b6aca3df1ff0adf1a9469e83983614f (diff) | |
download | barebox-242d9e7531fbc394214d2a54d3ff56a5690f397a.tar.gz barebox-242d9e7531fbc394214d2a54d3ff56a5690f397a.tar.xz |
sandbox: implement actual sandbox reset via exec(2)
On Linux, /proc/self/exe is a symlink to the originally exec(2)d
executable. We can exec that with the original argv to simulate
a reset. This is useful for shorter development cycles on sandbox
and in future, could be used to test barebox behavior around resets
(e.g. reset reason can be passed through via libc environment).
We leave the original hanging reset in place though, because:
- Many boards have multiple reset providers and incoming patches
will allow users to select a specific one. Having this on
sandbox as well makes testing easier.
- /proc/self/exe is Linux-specific and wouldn't work when being
run on e.g. BSDs or macOS
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/sandbox/Kconfig')
-rw-r--r-- | arch/sandbox/Kconfig | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/sandbox/Kconfig b/arch/sandbox/Kconfig index c4d0ab4dbc..b5213c662b 100644 --- a/arch/sandbox/Kconfig +++ b/arch/sandbox/Kconfig @@ -24,6 +24,13 @@ config SANDBOX_UNWIND select ARCH_HAS_STACK_DUMP depends on KASAN +config SANDBOX_REEXEC + prompt "exec(2) reset handler" + def_bool y + help + The normal reset handler hangs barebox. On Linux, barebox + instead can exec itself to simulate a reset. + config PHYS_ADDR_T_64BIT bool |