From 8a475f7e4ae72db0a6cfe31ab46f588e89e0fc34 Mon Sep 17 00:00:00 2001
From: Nick Kralevich <nnk@google.com>
Date: Tue, 29 Nov 2016 15:43:17 -0800
Subject: [PATCH] delete toolbox/r.c

/dev/mem has been turned off on all Android kernels (b/19549480). This
utility cannot be used.

Test: android compiles.
Change-Id: I500021f224febb15dd8bfe6e1f6e5c398fe6f552
---
 toolbox/Android.mk |   9 ----
 toolbox/r.c        | 102 ---------------------------------------------
 2 files changed, 111 deletions(-)
 delete mode 100644 toolbox/r.c

diff --git a/toolbox/Android.mk b/toolbox/Android.mk
index 5319ff4ab..d6ead1a09 100644
--- a/toolbox/Android.mk
+++ b/toolbox/Android.mk
@@ -81,15 +81,6 @@ $(INPUT_H_LABELS_H): $(LOCAL_PATH)/Android.mk $(LOCAL_PATH)/generate-input.h-lab
 $(INPUT_H_LABELS_H):
 	$(transform-generated-source)
 
-# We only want 'r' on userdebug and eng builds.
-include $(CLEAR_VARS)
-LOCAL_SRC_FILES := r.c
-LOCAL_CFLAGS += $(common_cflags)
-LOCAL_C_INCLUDES += $(LOCAL_PATH)/upstream-netbsd/include/
-LOCAL_MODULE := r
-LOCAL_MODULE_TAGS := debug
-include $(BUILD_EXECUTABLE)
-
 
 # We build BSD grep separately, so it can provide egrep and fgrep too.
 include $(CLEAR_VARS)
diff --git a/toolbox/r.c b/toolbox/r.c
deleted file mode 100644
index b96cdb279..000000000
--- a/toolbox/r.c
+++ /dev/null
@@ -1,102 +0,0 @@
-#include <fcntl.h>
-#include <inttypes.h>
-#include <stdbool.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/mman.h>
-#include <unistd.h>
-
-#if __LP64__
-#define strtoptr strtoull
-#else
-#define strtoptr strtoul
-#endif
-
-static int usage()
-{
-    fprintf(stderr,"r [-b|-s] <address> [<value>]\n");
-    return -1;
-}
-
-int main(int argc, char *argv[])
-{
-    if(argc < 2) return usage();
-
-    int width = 4;
-    if(!strcmp(argv[1], "-b")) {
-        width = 1;
-        argc--;
-        argv++;
-    } else if(!strcmp(argv[1], "-s")) {
-        width = 2;
-        argc--;
-        argv++;
-    }
-
-    if(argc < 2) return usage();
-    uintptr_t addr = strtoptr(argv[1], 0, 16);
-
-    uintptr_t endaddr = 0;
-    char* end = strchr(argv[1], '-');
-    if (end)
-        endaddr = strtoptr(end + 1, 0, 16);
-
-    if (!endaddr)
-        endaddr = addr + width - 1;
-
-    if (endaddr <= addr) {
-        fprintf(stderr, "end address <= start address\n");
-        return -1;
-    }
-
-    bool set = false;
-    uint32_t value = 0;
-    if(argc > 2) {
-        set = true;
-        value = strtoul(argv[2], 0, 16);
-    }
-
-    int fd = open("/dev/mem", O_RDWR | O_SYNC);
-    if(fd < 0) {
-        fprintf(stderr,"cannot open /dev/mem\n");
-        return -1;
-    }
-
-    off64_t mmap_start = addr & ~(PAGE_SIZE - 1);
-    size_t mmap_size = endaddr - mmap_start + 1;
-    mmap_size = (mmap_size + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1);
-
-    void* page = mmap64(0, mmap_size, PROT_READ | PROT_WRITE,
-                        MAP_SHARED, fd, mmap_start);
-
-    if(page == MAP_FAILED){
-        fprintf(stderr,"cannot mmap region\n");
-        return -1;
-    }
-
-    while (addr <= endaddr) {
-        switch(width){
-        case 4: {
-            uint32_t* x = (uint32_t*) (((uintptr_t) page) + (addr & 4095));
-            if(set) *x = value;
-            fprintf(stderr,"%08"PRIxPTR": %08x\n", addr, *x);
-            break;
-        }
-        case 2: {
-            uint16_t* x = (uint16_t*) (((uintptr_t) page) + (addr & 4095));
-            if(set) *x = value;
-            fprintf(stderr,"%08"PRIxPTR": %04x\n", addr, *x);
-            break;
-        }
-        case 1: {
-            uint8_t* x = (uint8_t*) (((uintptr_t) page) + (addr & 4095));
-            if(set) *x = value;
-            fprintf(stderr,"%08"PRIxPTR": %02x\n", addr, *x);
-            break;
-        }
-        }
-        addr += width;
-    }
-    return 0;
-}