16038, 16041, 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112,
16143, 16144, 16146, 16150, 16151, 16153, 16167, 16172, 16195, 16214,
16245, 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337,
- 16338, 16356, 16369, 16375.
+ 16338, 16356, 16369, 16372, 16375.
* Slovenian translations for glibc messages have been contributed by the
Translation Project's Slovenian team of translators.
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
+#include <sigaltstack-offsets.h>
+
.section .rodata.str1.8,"aMS",@progbits,1
.align 8
.LC0:
#define __longjmp ____longjmp_chk
-#define CHECK_RSP(reg) \
- cmp.ltu p0, p8 = reg, r12; \
-(p8) br.cond.dpnt .Lok;; \
- addl r28 = @ltoffx(longjmp_msg#), r1;; \
- ld8.mov r28 = [r28], longjmp_msg#;; \
- ld8 out0 = [r28]; \
+/* We use 32 bytes (rather than sizeof(stack_t)) so that we keep the stack
+ properly aligned. But we still want a sanity check to make sure 32 is
+ actually enough. */
+#define STACK_SPACE ((sizeSS + 31) & -32)
+
+/* Check the stack pointer held in the jumpbuf. Make sure it's in either the
+ current stack (r12) or in the signal stack. */
+#define CHECK_RSP \
+ ld8 loc0 = [in0]; \
+ ;; \
+ /* First see if target stack is within current one. */ \
+ cmp.ltu p0, p8 = loc0, r12; \
+(p8) br.cond.dptk.many .Lok; \
+ \
+ /* Check if it's an alternative signal stack. */ \
+ mov out0 = r0; \
+ add out1 = -STACK_SPACE, r12; \
+ ;; \
+ mov r12 = out1; \
+ DO_CALL_VIA_BREAK (SYS_ify (sigaltstack)); \
+ ;; \
+ /* If the syscall failed, then assume it's OK. */ \
+ cmp.eq p8, p0 = -1, r10; \
+(p8) br.cond.spnt .Lok; \
+ /* Move stack_t into regs. */ \
+ add r14 = oSS_FLAGS, r12; /* ss_flags */ \
+ add r15 = oSS_SIZE, r12; /* ss_size */ \
+ ld8 r16 = [r12]; /* ss_sp */ \
+ ;; \
+ ld4 r17 = [r14]; /* ss_flags */ \
+ ld8 r18 = [r15]; /* ss_size */ \
+ ;; \
+ sub r19 = r16, r18; /* sp - size */ \
+ /* See if we're currently on the altstack. */ \
+ tbit.nz p0, p8 = r17, 0; /* SS_ONSTACK */ \
+(p8) br.cond.spnt .Lfail; \
+ /* Verify target is within alternative stack. */ \
+ cmp.gtu p7, p0 = loc0, r16; \
+(p7) br.cond.spnt .Lfail; \
+ ;; \
+ cmp.ltu p0, p8 = loc0, r19; \
+(p8) br.cond.sptk.many .Lok; \
+ ;; \
+ \
+ /* Still here? Abort! */ \
+.Lfail: \
+ add r12 = STACK_SPACE, r12; \
+ addl loc0 = @ltoffx(longjmp_msg#), r1;; \
+ ld8.mov loc0 = [loc0], longjmp_msg#;; \
+ ld8 out0 = [loc0]; \
br.call.sptk.many b0 = HIDDEN_JUMPTARGET(__fortify_fail)#;; \
-.Lok:
+.Lok: \
+ add r12 = STACK_SPACE, r12;
#include "__longjmp.S"
LEAF(__longjmp)
#ifdef CHECK_RSP
- alloc r8=ar.pfs,2,1,1,0
+ alloc r8=ar.pfs,2,1,3,0
+ CHECK_RSP
#else
- alloc r8=ar.pfs,2,1,0,0
+ alloc r8=ar.pfs,2,0,0,0
#endif
mov r27=ar.rsc
add r2=0x98,in0 // r2 <- &jmpbuf.orig_jmp_buf_addr
mov r26=ar.rnat
mov ar.unat=r25 // setup ar.unat (NaT bits for r1, r4-r7, and r12)
;;
-#ifdef CHECK_RSP
- CHECK_RSP (r28)
-#endif
ld8.fill.nta gp=[r3],32 // r1 (gp)
dep r11=-1,r23,3,6 // r11 <- ia64_rse_rnat_addr(jmpbuf.ar_bsp)
mov sp=r28 // r12 (sp)
git.samba.org / jlayton / glibc.git / commitdiff