mirror of
https://github.com/Droid-Deck/DroidDeck.git
synced 2026-11-12 19:41:10 +00:00
MaxsTechReview
28067b3bbe
* Run x86_64 Flatpak apps through FEX * proot: run an execveat with an absolute path like execve * Find x86_64 Flatpak installs and resolve sandbox paths like the sandbox does
45 lines
1.6 KiB
Diff
45 lines
1.6 KiB
Diff
From 968f450754f97907d72a756add5010f6be746b6a Mon Sep 17 00:00:00 2001
|
|
From: maxjivi05 <maxjividen@gmail.com>
|
|
Date: Fri, 30 Oct 2026 20:21:28 -0400
|
|
Subject: [PATCH] syscall: run an execveat with an absolute path like execve
|
|
|
|
The kernel ignores the directory descriptor of execveat when the path is
|
|
absolute, so such a call is an execve with flags. FEX runs every child
|
|
of an emulated program through execveat(fd, "/proc/self/exe"), which
|
|
proot refused unless the descriptor was AT_FDCWD.
|
|
---
|
|
src/syscall/enter.c | 10 ++++++++--
|
|
1 file changed, 8 insertions(+), 2 deletions(-)
|
|
|
|
diff --git a/src/syscall/enter.c b/src/syscall/enter.c
|
|
index f8ce2e7..98241bd 100644
|
|
--- a/src/syscall/enter.c
|
|
+++ b/src/syscall/enter.c
|
|
@@ -129,8 +129,13 @@ int translate_syscall_enter(Tracee *tracee)
|
|
status = translate_execve_enter(tracee);
|
|
break;
|
|
|
|
- case PR_execveat:
|
|
- if ((int) peek_reg(tracee, CURRENT, SYSARG_1) == AT_FDCWD) {
|
|
+ case PR_execveat: {
|
|
+ word_t flags = peek_reg(tracee, CURRENT, SYSARG_5);
|
|
+ char first = '\0';
|
|
+ bool absolute = (flags & (AT_EMPTY_PATH | AT_SYMLINK_NOFOLLOW)) == 0
|
|
+ && read_data(tracee, &first, peek_reg(tracee, CURRENT, SYSARG_2), 1) == 0
|
|
+ && first == '/';
|
|
+ if ((int) peek_reg(tracee, CURRENT, SYSARG_1) == AT_FDCWD || absolute) {
|
|
set_sysnum(tracee, PR_execve);
|
|
poke_reg(tracee, SYSARG_1, peek_reg(tracee, CURRENT, SYSARG_2));
|
|
poke_reg(tracee, SYSARG_2, peek_reg(tracee, CURRENT, SYSARG_3));
|
|
@@ -142,6 +147,7 @@ int translate_syscall_enter(Tracee *tracee)
|
|
}
|
|
status = translate_execve_enter(tracee);
|
|
break;
|
|
+ }
|
|
|
|
case PR_ptrace:
|
|
status = translate_ptrace_enter(tracee);
|
|
--
|
|
2.43.0
|
|
|