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(common_init): Use rbs_get_base() to determine size of register-backing store.

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(Logical change 1.297)
This commit is contained in:
hp.com!davidm 2005-05-20 13:13:07 +00:00
parent 8236491807
commit 9724ac492c
1 changed files with 10 additions and 9 deletions
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19
src/ia64/init.h
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@ -28,7 +28,7 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
static ALWAYS_INLINE int static ALWAYS_INLINE int
common_init (struct cursor *c, unw_word_t sp, unw_word_t bsp) common_init (struct cursor *c, unw_word_t sp, unw_word_t bsp)
{ {
unw_word_t bspstore; unw_word_t bspstore, rbs_base;
uint8_t *natp; uint8_t *natp;
int ret; int ret;
@ -107,16 +107,17 @@ common_init (struct cursor *c, unw_word_t sp, unw_word_t bsp)
c->rbs_curr = c->rbs_left_edge = 0; c->rbs_curr = c->rbs_left_edge = 0;
/* There is no way to know the real size of the most recent /* Try to find a base of the register backing-store. We may default
(right-most) RBS so we'll just assume it to occupy a quarter of to a reasonable value (e.g., half the address-space down from
the address space (so we have a notion of "above" and "below" and bspstore). If the BSPSTORE looks corrupt, we fail. */
one bit to indicate whether the backing store needs to be if ((ret = rbs_get_base (c, bspstore, &rbs_base)) < 0)
accessed via uc_access(3)). */ return ret;
c->rbs_area[0].end = bspstore; c->rbs_area[0].end = bspstore;
c->rbs_area[0].size = ((unw_word_t) 1) << 63; /* initial guess... */ c->rbs_area[0].size = bspstore - rbs_base;
c->rbs_area[0].rnat_loc = IA64_REG_LOC (c, UNW_IA64_AR_RNAT); c->rbs_area[0].rnat_loc = IA64_REG_LOC (c, UNW_IA64_AR_RNAT);
Debug (10, "initial rbs-area: [?-0x%llx), rnat@%s\n", Debug (10, "initial rbs-area: [0x%llx-0x%llx), rnat@%s\n",
(long long) c->rbs_area[0].end, (long long) rbs_base, (long long) c->rbs_area[0].end,
ia64_strloc (c->rbs_area[0].rnat_loc)); ia64_strloc (c->rbs_area[0].rnat_loc));
c->pi.flags = 0; c->pi.flags = 0;