diff options
Diffstat (limited to 'arch/ia64/ia32/ia32_entry.S')
| -rw-r--r-- | arch/ia64/ia32/ia32_entry.S | 63 |
1 files changed, 57 insertions, 6 deletions
diff --git a/arch/ia64/ia32/ia32_entry.S b/arch/ia64/ia32/ia32_entry.S index bd7b0517b..ff27a02ce 100644 --- a/arch/ia64/ia32/ia32_entry.S +++ b/arch/ia64/ia32/ia32_entry.S @@ -1,14 +1,55 @@ #include <asm/offsets.h> #include <asm/signal.h> + // + // Get possibly unaligned sigmask argument into an aligned + // kernel buffer + .text + .proc ia32_rt_sigsuspend + .global ia32_rt_sigsuspend +ia32_rt_sigsuspend: + + // We'll cheat and not do an alloc here since we are ultimately + // going to do a simple branch to the IA64 sys_rt_sigsuspend. + // r32 is still the first argument which is the signal mask. + // We copy this 4-byte aligned value to an 8-byte aligned buffer + // in the task structure and then jump to the IA64 code. + + mov r8=r0 // no memory access errors yet + add r10=4,r32 + ;; +1: + ld4 r2=[r32] // get first half of sigmask + ld4 r3=[r10] // get second half of sigmask +2: + cmp.lt p6,p0=r8,r0 // check memory access + ;; +(p6) br.ret.sptk.many rp // it failed + + adds r32=IA64_TASK_THREAD_SIGMASK_OFFSET,r13 + adds r10=IA64_TASK_THREAD_SIGMASK_OFFSET+4,r13 + ;; + st4 [r32]=r2 + st4 [r10]=r3 + br.cond.sptk.many sys_rt_sigsuspend + + .section __ex_table,"a" + data4 @gprel(1b) + data4 (2b-1b)|1 + .previous + + + .endp ia32_rt_sigsuspend + .global ia32_ret_from_syscall - .proc ia64_ret_from_syscall + .proc ia32_ret_from_syscall ia32_ret_from_syscall: cmp.ge p6,p7=r8,r0 // syscall executed successfully? adds r2=IA64_PT_REGS_R8_OFFSET+16,sp // r2 = &pt_regs.r8 ;; st8 [r2]=r8 // store return value in slot for r8 br.cond.sptk.few ia64_leave_kernel + .endp ia32_ret_from_syscall // // Invoke a system call, but do some tracing before and after the call. @@ -35,10 +76,21 @@ ia32_trace_syscall: .endp ia32_trace_syscall .align 16 + .global sys32_vfork + .proc sys32_vfork +sys32_vfork: + alloc r16=ar.pfs,2,2,3,0;; + mov out0=IA64_CLONE_VFORK|IA64_CLONE_VM|SIGCHLD // out0 = clone_flags + br.cond.sptk.few .fork1 // do the work + .endp sys32_vfork + + .align 16 .global sys32_fork .proc sys32_fork sys32_fork: alloc r16=ar.pfs,2,2,3,0;; + mov out0=SIGCHLD // out0 = clone_flags +.fork1: movl r28=1f mov loc1=rp br.cond.sptk.many save_switch_stack @@ -46,7 +98,6 @@ sys32_fork: mov loc0=r16 // save ar.pfs across do_fork adds out2=IA64_SWITCH_STACK_SIZE+16,sp adds r2=IA64_SWITCH_STACK_SIZE+IA64_PT_REGS_R12_OFFSET+16,sp - mov out0=SIGCHLD // out0 = clone_flags ;; ld8 out1=[r2] // fetch usp from pt_regs.r12 br.call.sptk.few rp=do_fork @@ -88,7 +139,7 @@ ia32_syscall_table: data8 sys_setuid data8 sys_getuid data8 sys_ni_syscall /* sys_stime is not supported on IA64 */ /* 25 */ - data8 sys_ptrace + data8 sys32_ptrace data8 sys32_alarm data8 sys_ni_syscall data8 sys_ni_syscall @@ -105,7 +156,7 @@ ia32_syscall_table: data8 sys_rmdir /* 40 */ data8 sys_dup data8 sys32_pipe - data8 sys_times + data8 sys32_times data8 sys_ni_syscall /* old prof syscall holder */ data8 sys_brk /* 45 */ data8 sys_setgid @@ -139,7 +190,7 @@ ia32_syscall_table: data8 sys_sethostname data8 sys32_setrlimit /* 75 */ data8 sys32_getrlimit - data8 sys_getrusage + data8 sys32_getrusage data8 sys32_gettimeofday data8 sys32_settimeofday data8 sys_getgroups /* 80 */ @@ -241,7 +292,7 @@ ia32_syscall_table: data8 sys_rt_sigpending data8 sys_rt_sigtimedwait data8 sys_rt_sigqueueinfo - data8 sys_rt_sigsuspend + data8 ia32_rt_sigsuspend data8 sys_pread /* 180 */ data8 sys_pwrite data8 sys_chown |