mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-11-15 20:58:13 +01:00
67 lines
1.5 KiB
C
67 lines
1.5 KiB
C
/*
|
|
* Copyright (C) 1998, 1999, 2002, 2003, 2005 Hewlett-Packard Co
|
|
* David Mosberger-Tang <davidm@hpl.hp.com>
|
|
*
|
|
* Register stack engine related helper functions. This file may be
|
|
* used in applications, so be careful about the name-space and give
|
|
* some consideration to non-GNU C compilers (though __inline__ is
|
|
* fine).
|
|
*/
|
|
#ifndef RSE_H
|
|
#define RSE_H
|
|
|
|
#include <libunwind.h>
|
|
|
|
static inline uint64_t
|
|
rse_slot_num (uint64_t addr)
|
|
{
|
|
return (addr >> 3) & 0x3f;
|
|
}
|
|
|
|
/*
|
|
* Return TRUE if ADDR is the address of an RNAT slot.
|
|
*/
|
|
static inline uint64_t
|
|
rse_is_rnat_slot (uint64_t addr)
|
|
{
|
|
return rse_slot_num (addr) == 0x3f;
|
|
}
|
|
|
|
/*
|
|
* Returns the address of the RNAT slot that covers the slot at
|
|
* address SLOT_ADDR.
|
|
*/
|
|
static inline uint64_t
|
|
rse_rnat_addr (uint64_t slot_addr)
|
|
{
|
|
return slot_addr | (0x3f << 3);
|
|
}
|
|
|
|
/*
|
|
* Calculate the number of registers in the dirty partition starting at
|
|
* BSPSTORE and ending at BSP. This isn't simply (BSP-BSPSTORE)/8
|
|
* because every 64th slot stores ar.rnat.
|
|
*/
|
|
static inline uint64_t
|
|
rse_num_regs (uint64_t bspstore, uint64_t bsp)
|
|
{
|
|
uint64_t slots = (bsp - bspstore) >> 3;
|
|
|
|
return slots - (rse_slot_num(bspstore) + slots)/0x40;
|
|
}
|
|
|
|
/*
|
|
* The inverse of the above: given bspstore and the number of
|
|
* registers, calculate ar.bsp.
|
|
*/
|
|
static inline uint64_t
|
|
rse_skip_regs (uint64_t addr, long num_regs)
|
|
{
|
|
long delta = rse_slot_num(addr) + num_regs;
|
|
|
|
if (num_regs < 0)
|
|
delta -= 0x3e;
|
|
return addr + ((num_regs + delta/0x3f) << 3);
|
|
}
|
|
|
|
#endif /* RSE_H */
|