diff options
| -rw-r--r-- | sys/ia64/ia64/unwind.c | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/sys/ia64/ia64/unwind.c b/sys/ia64/ia64/unwind.c index 5259166..e4684ff 100644 --- a/sys/ia64/ia64/unwind.c +++ b/sys/ia64/ia64/unwind.c @@ -78,6 +78,8 @@ struct unwind_fpreg { }; struct ia64_unwind_state { + LIST_ENTRY(ia64_unwind_state) us_link; /* free list */ + /* * Current register state and location of saved register state */ @@ -115,6 +117,9 @@ struct ia64_unwind_state { static int ia64_unwind_initialised; static struct ia64_unwind_table_list ia64_unwind_tables; +#define MAX_UNWIND_STATES 4 +static struct ia64_unwind_state ia64_unwind_state_static[MAX_UNWIND_STATES]; +static LIST_HEAD(ia64_unwind_state_list, ia64_unwind_state) ia64_unwind_states; struct ia64_unwind_table * ia64_add_unwind_table(u_int64_t *base, u_int64_t *start, u_int64_t *end) @@ -122,7 +127,14 @@ ia64_add_unwind_table(u_int64_t *base, u_int64_t *start, u_int64_t *end) struct ia64_unwind_table *ut; if (!ia64_unwind_initialised) { + int i; LIST_INIT(&ia64_unwind_tables); + LIST_INIT(&ia64_unwind_states); + for (i = 0; i < MAX_UNWIND_STATES; i++) { + LIST_INSERT_HEAD(&ia64_unwind_states, + &ia64_unwind_state_static[i], + us_link); + } ia64_unwind_initialised = 1; } @@ -194,9 +206,15 @@ ia64_create_unwind_state(struct trapframe *framep) if (!ia64_unwind_initialised) return 0; - us = malloc(sizeof(struct ia64_unwind_state), M_UNWIND, M_NOWAIT); - if (!us) - return 0; + us = LIST_FIRST(&ia64_unwind_states); + if (us) { + LIST_REMOVE(us, us_link); + } else { + us = malloc(sizeof(struct ia64_unwind_state), + M_UNWIND, M_NOWAIT); + if (!us) + return 0; + } bzero(us, sizeof(*us)); us->us_regs.rs_psp.ur_value = framep->tf_r[FRAME_SP]; @@ -232,7 +250,7 @@ ia64_create_unwind_state(struct trapframe *framep) void ia64_free_unwind_state(struct ia64_unwind_state *us) { - free(us, M_UNWIND); + LIST_INSERT_HEAD(&ia64_unwind_states, us, us_link); } u_int64_t |
