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#define SB_NO_TRACE_ARCH
#if 0 /* XXX: broken sometimes #293632 */
/* Since sparc's g0 register is hardcoded to 0 in the ISA, the kernel does not
* bother copying it out when using the regs ptrace. Instead it shifts things
* by one and stores [g1..g7] in [0..6] and [o0..o7] in [7..14] (leaving the
* last u_reg[15] unused).
*
* Oddly, the kernel defines are not adjusted to the values as they written in
* the register structure -- UREG_G0 is 0, UREG_G1 is 1, etc... So we have to
* define our own to get correct behavior. Also, the kernel uses UREG_I# when
* it's easier for us to think of it in terms of UREG_O# (register windows!).
*
* This should work for both 32 and 64 bit Linux userland.
*/
#define U_REG_G1 0
#define U_REG_O0 7
/* Sparc systems have swapped the addr/data args. */
#undef trace_get_regs
#define trace_get_regs(regs) do_ptrace(PTRACE_GETREGS, regs, NULL)
#undef trace_set_regs
#define trace_set_regs(regs) do_ptrace(PTRACE_SETREGS, regs, NULL)
#define trace_reg_sysnum u_regs[U_REG_G1]
static long trace_raw_ret(void *vregs)
{
trace_regs *regs = vregs;
return regs->u_regs[U_REG_O0];
}
static void trace_set_ret(void *vregs, int err)
{
trace_regs *regs = vregs;
/* The carry bit is used to flag errors. */
regs->psr |= PSR_C;
/* Userland negates the value on sparc. */
regs->u_regs[U_REG_O0] = err;
trace_set_regs(regs);
}
static unsigned long trace_arg(void *vregs, int num)
{
trace_regs *regs = vregs;
if (num < 7)
return regs->u_regs[U_REG_O0 + num - 1];
else
return -1;
}
#endif
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