From: Ralph Ronnquist <ralph.ronnquist@gmail.com>
Date: Mon, 21 Mar 2022 03:26:47 +0000 (+1100)
Subject: declare memory as non-executable jic
X-Git-Tag: deb_0.1~28
X-Git-Url: https://git.rrq.au/?a=commitdiff_plain;h=aaaec2ad93918f6ab73a2f9520ca3a9952d5c9a3;p=rrq%2Foverlay-boot.git

declare memory as non-executable jic
---

diff --git a/reaper/reaper.asm b/reaper/reaper.asm
index b570481..0086a8f 100644
--- a/reaper/reaper.asm
+++ b/reaper/reaper.asm
@@ -1,5 +1,7 @@
-;;; Compact subhost repear program to merely wait for children to
-;;; "reap" them, i.e. let them exit.
+;;; This is a "repear" program that merely waits for child processes
+;;; to appear and "reap" them, i.e. read their exit status to let them
+;;; exit. The program allows an arbitrary first argument that is
+;;; indended for identifying the reaper process.
 
 	format elf64 executable
 	entry main
@@ -12,7 +14,6 @@ set:	dq -1	; all bits set
 	
 ;;; siginfo_t status -- all ignored
 status:	rept 16 { dq 0 }
-
 status$end:
 	
 ;;; A code segment
@@ -67,3 +68,6 @@ clear:	stosq
 	mov rdi, rax
 	mov rax, qword 60
         syscall 	; exit program
+
+;;; The rest of memory is not executable
+	segment readable writable