You can examine the contents of registers in the same way that you examine the contents of memory. Specify a register by preceding its name with a dollar sign. For example,
$f0/
prints the contents of the X register.
Specify a number after the slash to print the contents of multiple registers. For example,
$f0/3
prints the contents of registers f0, f1, and f2. The order in which the registers are displayed is that shown in Table 4-1.
You can also specify a format, as described above. The format specifier controls the display of the output; it doesn't affect how much of the register contents is displayed. Thus,
$f0/3X
displays three registers; the output is displayed as hexadecimal longwords.
The registers in the UltraSPARC processor are listed in Table 4-2.
Table 4-2 UltraSPARC Registers
Name |
Register |
---|---|
$g0-$g7 |
Global registers (64 bits) |
$o0-$o7 |
Output registers (64 bits) |
$l0-$l7 |
Local registers |
$i0-$i7 |
Input registers |
$psr |
Processor state register |
$pc |
Program counter |
$npc |
Next program counter |
$y |
Y register |
$wim |
Window invalid mask |
$tbr |
Trap base register |
$f0-$f31 |
Floating-point registers |
$fsr |
Floating status register (64 bits) |
$f0f1-$f62f63 |
Floating-point registers |
$xg0-$xg7 |
Upper 32 bits of $g0-$g7 (SPARC V8 plus only, or higher) |
$xo0-$xo7 |
Upper 32 bits of $o0-$o7 (SPARC V8 plus only, or higher) |
$xfsr |
Upper 32 bits of $fsr (SPARC V8 plus only, or higher) |
$fprs |
Floating-point registers state (SPARC V8 plus only, or higher) |
$tstate |
Trap state register (SPARC V8 plus only, or higher) |
$fp |
Frame pointer (synonym for $i6) |
$sp |
Stack pointer (synonym for $o6) |