diff options
| author | gonzo <gonzo@FreeBSD.org> | 2012-02-09 22:17:13 +0000 |
|---|---|---|
| committer | gonzo <gonzo@FreeBSD.org> | 2012-02-09 22:17:13 +0000 |
| commit | 4fc3bdaf2c31a67f9ade71bdaf263600f8ffe3fd (patch) | |
| tree | 39bde5cec6ce044e029846a1e06092663f2f7638 /sys/mips/include | |
| parent | c8d9c45343d1af57f79ef8e55c281fb910ade3b9 (diff) | |
| download | FreeBSD-src-4fc3bdaf2c31a67f9ade71bdaf263600f8ffe3fd.zip FreeBSD-src-4fc3bdaf2c31a67f9ade71bdaf263600f8ffe3fd.tar.gz | |
- Emulate RDHWR instruction for TLS support
Reading register $29 with RDHWR is becoming the de-facto standard to
implement TLS. According to linux-mips wiki, MIPS Technologies has
reserved hardware register $29 for ABI use. Furthermore current GCC
makes the following assumptions:
- RDHWR is natively available or otherwise emulated by the kernel
- Register $29 holds the TLS pointer
Submitted by: Robert Millan <rmh@debian.org>
Diffstat (limited to 'sys/mips/include')
| -rw-r--r-- | sys/mips/include/mips_opcode.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/sys/mips/include/mips_opcode.h b/sys/mips/include/mips_opcode.h index 72f281a..fd0e976 100644 --- a/sys/mips/include/mips_opcode.h +++ b/sys/mips/include/mips_opcode.h @@ -176,6 +176,11 @@ typedef union { #define OP_LDL 032 #define OP_LDR 033 +#define OP_SPECIAL2 034 +#define OP_JALX 035 + +#define OP_SPECIAL3 037 + #define OP_LB 040 #define OP_LH 041 #define OP_LWL 042 @@ -389,6 +394,11 @@ typedef union { #define OP_R_BGEZALL OP_BGEZALL /* + * Values for the 'func' field when 'op' == OP_SPECIAL3. + */ +#define OP_RDHWR 073 + +/* * Values for the 'rs' field when 'op' == OP_COPz. */ #define OP_MF 000 |
