From: Apple <opensource@apple.com>
Date: Fri, 18 Dec 2020 07:18:26 +0000 (+0000)
Subject: system_cmds-880.60.2.tar.gz
X-Git-Tag: macos-112^0
X-Git-Url: https://git.saurik.com/apple/system_cmds.git/commitdiff_plain/0813f9a61ea926dc2b5d6747467d2a1a4cae012e

system_cmds-880.60.2.tar.gz
---

diff --git a/arch.tproj/arch.1 b/arch.tproj/arch.1
index daad0af..234b339 100644
--- a/arch.tproj/arch.1
+++ b/arch.tproj/arch.1
@@ -86,8 +86,20 @@ argument must be one of the currently supported architectures:
 64-bit intel
 .It x86_64h
 64-bit intel (haswell)
+.It arm64
+64-bit arm
+.It arm64e
+64-bit arm (Apple Silicon)
 .El
 .Pp
+If the binary does not contain code for
+.Ar arch_name ,
+the
+.Nm arch
+command may try to select a close match. If arm64 is specified and not found,
+arm64e will be tried next. If this happens, the order the architectures will
+be tried is not guaranteed.
+.Pp
 Either prefix the architecture with a hyphen, or (for compatibility with
 other commands), use
 .Fl arch
@@ -207,17 +219,17 @@ If not specified as a second field in a specifier, the executable path will
 be looked up in the corresponding property list file.
 .Ss Example ARCHPREFERENCE Values
 .Bl -tag -width "    "
-.It i386,x86_64,x86_64h
+.It i386,x86_64,x86_64h,arm64,arm64e
 A specifier that matches any name.
-.It foo:i386,x86_64,x86_64h
+.It foo:i386,x86_64,x86_64h,arm64,arm64e
 A specifier that matches the program named
 .Nm foo
 (the full executable path is in the
 .Pa foo.plist
 file).
-.It foo:/op/bin/boo:i386,x86_64,x86_64h
+.It foo:/op/bin/boo:i386,x86_64,x86_64h,arm64,arm64e
 A specifier with all fields specified.
-.It baz:i386;x86_64;x86_64h
+.It baz:i386;x86_64;x86_64h,arm64,arm64e
 A specifier for
 .Nm baz
 and a second specifier that would match any other name.
diff --git a/arch.tproj/arch.c b/arch.tproj/arch.c
index 3a38c68..b522ce8 100644
--- a/arch.tproj/arch.c
+++ b/arch.tproj/arch.c
@@ -89,6 +89,9 @@ static const CPUTypes knownArchs[] = {
     {"x86_64h", CPU_TYPE_X86_64, CPU_SUBTYPE_X86_64_H},
     {"arm", CPU_TYPE_ARM, CPU_SUBTYPE_ARM_ALL},
     {"arm64", CPU_TYPE_ARM64, CPU_SUBTYPE_ARM64_ALL},
+    /* rdar://65725144 ("arch -arm64" command should launch arm64e slice for 2-way fat x86_64+arm64e binaries) */
+    /* This will modify the order if someone, for whatever reason, specifies -arch arm64 -arch x86_64 -arch arm64e */
+    {"arm64", CPU_TYPE_ARM64, CPU_SUBTYPE_ARM64E},
     {"arm64e", CPU_TYPE_ARM64, CPU_SUBTYPE_ARM64E},
     {"arm64_32", CPU_TYPE_ARM64_32, CPU_SUBTYPE_ARM64_32_ALL},
 };
@@ -296,14 +299,21 @@ static void
 addCPUbyname(CPU *cpu, const char *name)
 {
     int i;
+    size_t numKnownArchs = sizeof(knownArchs)/sizeof(knownArchs[0]);
     
-    for (i=0; i < sizeof(knownArchs)/sizeof(knownArchs[0]); i++) {
+    for (i=0; i < numKnownArchs; i++) {
         if (!isSupportedCPU(knownArchs[i].cpu))
             continue;
-        if (0 == strcasecmp(name, knownArchs[i].arch)) {
+        int start = i;
+        /* rdar://65725144 ("arch -arm64" command should launch arm64e slice for 2-way fat x86_64+arm64e binaries) */
+        /* Add subtypes that closely match the specified name */
+        while ( i < numKnownArchs &&
+                0 == strcasecmp(name, knownArchs[i].arch) ) {
             addCPU(cpu, knownArchs[i].cpu, knownArchs[i].cpusubtype);
-            return;
+            i++;
         }
+        if (start != i)
+            return;
     }
     
     /* Didn't match a string in knownArchs */