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SubjectRe: [RFT] final cur of tr based current for -ac8
On Sat, 10 Nov 2001, Benjamin LaHaise wrote:

> +static unsigned get_TR(void)
> +{
> + unsigned tr;
> + /* The PAIN! The HORROR!
> + * Technically this is wrong, wrong, wrong, but
> + * gas doesn't know about strl. *sigh* Please
> + * flog them with a wet noodle repeatedly. -ben
> + */
> + __asm__ __volatile__("str %w0" : "=r" (tr));
> + return tr;
> +}

The below seems to make flogging noises, but is likely too soggy.

-Mike

diff -urN binutils-2.11.2/include/opcode/i386.h binutils-2.11.2.twiddle/include/opcode/i386.h
--- binutils-2.11.2/include/opcode/i386.h Sat May 12 12:09:19 2001
+++ binutils-2.11.2.noodle/include/opcode/i386.h Sun Nov 11 09:46:13 2001
@@ -555,7 +555,8 @@
{"sidt", 1, 0x0f01, 1, Cpu286, wlq_Suf|Modrm, { WordMem, 0, 0} },
{"sldt", 1, 0x0f00, 0, Cpu286, wlq_Suf|Modrm, { WordReg|WordMem, 0, 0} },
{"smsw", 1, 0x0f01, 4, Cpu286, wlq_Suf|Modrm, { WordReg|WordMem, 0, 0} },
-{"str", 1, 0x0f00, 1, Cpu286, w_Suf|Modrm|IgnoreSize,{ Reg16|ShortMem, 0, 0} },
+{"str", 1, 0x0f00, 1, Cpu286, w_Suf|Modrm|IgnoreSize,{ Reg16|ShortMem, 0, 0} },
+{"str", 1, 0x0f00, 1, Cpu386, wlq_Suf|Modrm, { WordReg|WordMem, 0, 0} },

{"verr", 1, 0x0f00, 4, Cpu286, w_Suf|Modrm|IgnoreSize,{ Reg16|ShortMem, 0, 0} },
{"verw", 1, 0x0f00, 5, Cpu286, w_Suf|Modrm|IgnoreSize,{ Reg16|ShortMem, 0, 0} },
diff -urN binutils-2.11.2/opcodes/i386-dis.c binutils-2.11.2.twiddle/opcodes/i386-dis.c
--- binutils-2.11.2/opcodes/i386-dis.c Mon Jun 11 12:05:17 2001
+++ binutils-2.11.2.noodle/opcodes/i386-dis.c Sun Nov 11 08:56:45 2001
@@ -2466,7 +2466,7 @@
/* GRP6 */
{
{ "sldt", Ew, XX, XX },
- { "str", Ew, XX, XX },
+ { "strQ", Ev, XX, XX },
{ "lldt", Ew, XX, XX },
{ "ltr", Ew, XX, XX },
{ "verr", Ew, XX, XX },
-----------------------------------------------------------------------
static unsigned get_TR(int tryit)
{
unsigned tr;
if (tryit)
__asm__ __volatile__("strl %0" : "=r" (tr));
else
__asm__ __volatile__("str %w0" : "=r" (tr));
return tr;
}
08048400 <get_TR>:
8048400: 55 push %ebp
8048401: 89 e5 mov %esp,%ebp
8048403: 83 7d 08 00 cmpl $0x0,0x8(%ebp)
8048407: 74 07 je 8048410 <get_TR+0x10>
8048409: 0f 00 c8 str %eax
804840c: eb 06 jmp 8048414 <get_TR+0x14>
804840e: 89 f6 mov %esi,%esi
8048410: 66 0f 00 c8 str %ax
8048414: 89 ec mov %ebp,%esp
8048416: 5d pop %ebp
8048417: c3 ret

-
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