Author: rlibby
Date: Tue Sep 5 19:04:07 2017
New Revision: 323192
URL: https://svnweb.freebsd.org/changeset/base/323192
Log:
gnu binutils: FSGSBASE assembly/disassembly
Enable the in-tree binutils to assemble and disassemble amd64 FSGSBASE
instructions (rdfsbase, rdgsbase, wrfsbase, wrgsbase), used in the base
system since r322763.
This gives one last gasp for in-tree gcc, and provides a small
enhancement for in-tree binutils objdump.
Reviewed by: dim, kib
Approved by: markj (mentor)
Sponsored by: Dell EMC Isilon
Differential Revision:https://reviews.freebsd.org/D1
Modified:
head/contrib/binutils/opcodes/i386-dis.c
head/contrib/binutils/opcodes/i386-opc.h
head/contrib/binutils/opcodes/i386-opc.tbl
head/contrib/binutils/opcodes/i386-tbl.h
Modified: head/contrib/binutils/opcodes/i386-dis.c
==
--- head/contrib/binutils/opcodes/i386-dis.cTue Sep 5 18:13:11 2017
(r323191)
+++ head/contrib/binutils/opcodes/i386-dis.cTue Sep 5 19:04:07 2017
(r323192)
@@ -1302,7 +1302,7 @@ static const unsigned char twobyte_uses_REPZ_prefix[25
/* 70 */ 1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1, /* 7f */
/* 80 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 8f */
/* 90 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 9f */
- /* a0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* af */
+ /* a0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* af */
/* b0 */ 0,0,0,0,0,0,0,0,1,0,0,0,0,1,0,0, /* bf */
/* c0 */ 0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0, /* cf */
/* d0 */ 0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0, /* df */
@@ -1793,10 +1793,10 @@ static const struct dis386 grps[][8] = {
},
/* GRP15 */
{
-{ "fxsave",{ Ev } },
-{ "fxrstor", { Ev } },
-{ "ldmxcsr", { Ev } },
-{ "stmxcsr", { Ev } },
+{ "fxsave",{ { OP_0fae, v_mode } } },
+{ "fxrstor", { { OP_0fae, v_mode } } },
+{ "ldmxcsr", { { OP_0fae, v_mode } } },
+{ "stmxcsr", { { OP_0fae, v_mode } } },
{ "xsave", { Ev } },
{ "xrstor",{ { OP_0fae, v_mode } } },
{ "xsaveopt", { { OP_0fae, v_mode } } },
@@ -5997,19 +5997,34 @@ OP_0fae (int bytemode, int sizeflag)
{
if (modrm.mod == 3)
{
- if (modrm.reg == 7)
- strcpy (obuf + strlen (obuf) - sizeof ("clflush") + 1, "sfence");
- else if (modrm.reg == 6)
- strcpy (obuf + strlen (obuf) - sizeof ("xsaveopt") + 1, "mfence");
- else if (modrm.reg == 5)
- strcpy (obuf + strlen (obuf) - sizeof ("xrstor") + 1, "lfence");
-
- if (modrm.reg < 5 || modrm.rm != 0)
+ if (modrm.reg >= 5 && modrm.reg <= 7 && modrm.rm == 0)
{
- BadOp (); /* bad sfence, mfence, or lfence */
+ if (modrm.reg == 7)
+ strcpy (obuf + strlen (obuf) - sizeof ("clflush") + 1, "sfence");
+ else if (modrm.reg == 6)
+ strcpy (obuf + strlen (obuf) - sizeof ("xsaveopt") + 1, "mfence");
+ else if (modrm.reg == 5)
+ strcpy (obuf + strlen (obuf) - sizeof ("xrstor") + 1, "lfence");
+ bytemode = 0;
+ }
+ else if (modrm.reg <= 3 && (prefixes & PREFIX_REPZ) != 0)
+ {
+ if (modrm.reg == 0)
+ strcpy (obuf + strlen (obuf) - sizeof ("fxsave") + 1, "rdfsbase");
+ else if (modrm.reg == 1)
+ strcpy (obuf + strlen (obuf) - sizeof ("fxrstor") + 1, "rdgsbase");
+ else if (modrm.reg == 2)
+ strcpy (obuf + strlen (obuf) - sizeof ("ldmxcsr") + 1, "wrfsbase");
+ else if (modrm.reg == 3)
+ strcpy (obuf + strlen (obuf) - sizeof ("stmxcsr") + 1, "wrgsbase");
+ used_prefixes |= PREFIX_REPZ;
+ bytemode = dq_mode;
+ }
+ else
+ {
+ BadOp ();
return;
}
- bytemode = 0;
}
OP_E (bytemode, sizeflag);
Modified: head/contrib/binutils/opcodes/i386-opc.h
==
--- head/contrib/binutils/opcodes/i386-opc.hTue Sep 5 18:13:11 2017
(r323191)
+++ head/contrib/binutils/opcodes/i386-opc.hTue Sep 5 19:04:07 2017
(r323192)
@@ -81,6 +81,7 @@ typedef struct template
#define CpuPCLMUL 0x1000 /* Carry-less Multiplication extensions */
#define CpuRdRnd0x2000 /* Intel Random Number Generator extensions */
#define CpuSMAP 0x4000 /* Intel Supervisor Mode Access Prevention */
+#define CpuFSGSBase 0x8000 /* Read/write fs/gs segment base registers */
/* SSE4.1/4.2 Instructions required */
#define CpuSSE4 (CpuSSE4_1|CpuSSE4_2)
@@ -89,7 +90,8 @@ typedef struct template
#define CpuUnknownFlags (Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686 \
|CpuP4|CpuSledgehammer|CpuMMX|CpuMMX2|CpuSSE|CpuSSE2|CpuSSE3|CpuVMX \
|Cpu3dnow|Cpu3dnowA|CpuK6|CpuPadLock|CpuSVME|CpuSSSE3|CpuSSE4_1 \
- |CpuSSE4_2|CpuABM|CpuSSE4a|CpuXSAVE|CpuAES|CpuPCLMUL|CpuRdRnd|C
