new package: rappel

Closes https://github.com/termux/termux-packages/issues/5735.

packages/rappel/build.sh

@@ -0,0 +1,32 @@
+TERMUX_PKG_HOMEPAGE=https://github.com/yrp604/rappel
+TERMUX_PKG_DESCRIPTION="Rappel is a pretty janky assembly REPL."
+TERMUX_PKG_LICENSE="custom"
+TERMUX_PKG_LICENSE_FILE="LICENSE"
+TERMUX_PKG_VERSION=2020.09.18
+TERMUX_PKG_SRCURL=https://github.com/yrp604/rappel/archive/dd45bfa000efb89357d5c80a3a77550b96dee499.tar.gz
+TERMUX_PKG_SHA256=c310855880051a9e0c802b74ba0c8eafddeb5bd2a930728356101e385d04d015
+TERMUX_PKG_DEPENDS="binutils, libedit"
+TERMUX_PKG_BUILD_IN_SRC=true
+
+termux_step_make() {
+	local _ARCH
+
+	if [ "$TERMUX_ARCH" = "i686" ]; then
+		_ARCH="x86"
+	elif [ "$TERMUX_ARCH" = "x86_64" ]; then
+		_ARCH="amd64"
+        elif [ "$TERMUX_ARCH" = "arm" ]; then
+                _ARCH="armv7"
+	elif [ "$TERMUX_ARCH" = "aarch64" ]; then
+		_ARCH="armv8"
+	else
+		_ARCH=$TERMUX_ARCH
+	fi
+
+	make ARCH=$_ARCH CC="$CC $CPPFLAGS $CFLAGS" LDFLAGS="$LDFLAGS" -j $TERMUX_MAKE_PROCESSES
+}
+
+termux_step_make_install() {
+	cd bin
+	install -Dm755 -t "$TERMUX_PREFIX/bin" rappel
+}

packages/rappel/missing-fexecve.patch

@@ -0,0 +1,43 @@
+diff -uNr rappel-dd45bfa000efb89357d5c80a3a77550b96dee499/ptrace.c rappel-dd45bfa000efb89357d5c80a3a77550b96dee499.mod/ptrace.c
+--- rappel-dd45bfa000efb89357d5c80a3a77550b96dee499/ptrace.c	2020-09-18 06:37:45.000000000 +0000
++++ rappel-dd45bfa000efb89357d5c80a3a77550b96dee499.mod/ptrace.c	2020-11-05 19:35:22.347935876 +0000
+@@ -7,6 +7,7 @@
+ #include <string.h>
+ #include <unistd.h>
+ 
++#include <sys/stat.h>
+ #include <sys/ptrace.h>
+ #include <sys/types.h>
+ #include <sys/wait.h>
+@@ -103,6 +104,31 @@
+ 	return ret;
+ }
+ 
++static int
++fexecve (int fd, char *const argv[], char *const envp[])
++{
++  if (fd < 0 || argv == NULL || envp == NULL)
++    {
++      errno = EINVAL;
++      return -1;
++    }
++
++  char buf[sizeof "/proc/self/fd/" + sizeof (int) * 3];
++  snprintf(buf, sizeof (buf), "/proc/self/fd/%d", fd);
++
++  execve(buf, argv, envp);
++
++  int save = errno;
++
++  struct stat st;
++  if (stat("/proc/self/fd", &st) != 0 && errno == ENOENT)
++    save = ENOSYS;
++
++  errno = save;
++
++  return -1;
++}
++
+ void ptrace_child(
+ 		const int exe_fd)
+ {

packages/rappel/struct-redef.patch

@@ -0,0 +1,12 @@
+diff -uNr rappel-dd45bfa000efb89357d5c80a3a77550b96dee499/arch/armv7/include/arch.h rappel-dd45bfa000efb89357d5c80a3a77550b96dee499.mod/arch/armv7/include/arch.h
+--- rappel-dd45bfa000efb89357d5c80a3a77550b96dee499/arch/armv7/include/arch.h	2020-09-18 06:37:45.000000000 +0000
++++ rappel-dd45bfa000efb89357d5c80a3a77550b96dee499.mod/arch/armv7/include/arch.h	2020-11-05 19:37:33.067086558 +0000
+@@ -17,7 +17,7 @@
+ 
+ struct user_fpregs_armv7
+ {
+-	struct fp_reg
++	struct a_fp_reg
+ 	{
+ 		unsigned int sign1:1;
+ 		unsigned int unused:15;