diff options
Diffstat (limited to 'arch/sparc64/kernel/entry.S')
| -rw-r--r-- | arch/sparc64/kernel/entry.S | 78 |
1 files changed, 64 insertions, 14 deletions
diff --git a/arch/sparc64/kernel/entry.S b/arch/sparc64/kernel/entry.S index 589d1661a..579fbb4c2 100644 --- a/arch/sparc64/kernel/entry.S +++ b/arch/sparc64/kernel/entry.S @@ -1,4 +1,4 @@ -/* $Id: entry.S,v 1.21 1997/05/18 10:04:44 davem Exp $ +/* $Id: entry.S,v 1.27 1997/05/27 19:30:11 jj Exp $ * arch/sparc64/kernel/entry.S: Sparc64 trap low-level entry points. * * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) @@ -18,6 +18,8 @@ #include <asm/signal.h> #include <asm/pgtable.h> +/* define SYSCALL_TRACING */ + #define curptr g6 #define NR_SYSCALLS 256 /* Each OS is different... */ @@ -52,6 +54,11 @@ sparc64_dtlb_prot_catch: b,a,pt %xcc, 1f sparc64_dtlb_refbit_catch: + srlx %g5, 9, %g4 + and %g4, ((_PAGE_PRESENT | _PAGE_READ) >> 9), %g4 + cmp %g4, ((_PAGE_PRESENT | _PAGE_READ) >> 9) + be,a,pt %xcc, 2f + mov 1, %g4 wr %g0, ASI_DMMU, %asi rdpr %pstate, %g1 wrpr %g1, PSTATE_AG|PSTATE_MG, %pstate @@ -75,6 +82,11 @@ sparc64_dtlb_refbit_catch: ba,a,pt %xcc, rtrap sparc64_itlb_refbit_catch: + srlx %g5, 9, %g4 + and %g4, ((_PAGE_PRESENT | _PAGE_READ) >> 9), %g4 + cmp %g4, ((_PAGE_PRESENT | _PAGE_READ) >> 9) + be,a,pt %xcc, 3f + mov 1, %g4 rdpr %pstate, %g1 wrpr %g1, PSTATE_AG|PSTATE_MG, %pstate ba,pt %xcc, etrap @@ -89,6 +101,22 @@ sparc64_itlb_refbit_catch: add %sp, STACK_BIAS + REGWIN_SZ, %o0 ! pt_regs ptr ba,a,pt %xcc, rtrap +2: + sllx %g4, 63, %g4 ! _PAGE_VALID + or %g5, _PAGE_ACCESSED, %g5 + or %g5, %g4, %g5 + stxa %g5, [%g3 + %g1] ASI_PHYS_USE_EC ! store new PTE + stxa %g5, [%g0] ASI_DTLB_DATA_IN ! TLB load + retry + +3: + sllx %g4, 63, %g4 ! _PAGE_VALID + or %g5, _PAGE_ACCESSED, %g5 + or %g5, %g4, %g5 + stxa %g5, [%g3 + %g1] ASI_PHYS_USE_EC ! store new PTE + stxa %g5, [%g0] ASI_ITLB_DATA_IN ! TLB load + retry + /* Note check out head.h, this code isn't even used for UP, * for SMP things will be different. In particular the data * registers for cross calls will be: @@ -161,6 +189,7 @@ breakpoint_trap: .globl sys_pipe, sys_execve, sys_sigpause, sys_nis_syscall .globl sys_sigsuspend, sys_sigreturn + .globl sys32_execve, sys_ptrace sys_pipe: sethi %hi(sparc_pipe), %g1 @@ -180,6 +209,12 @@ sys_execve: jmpl %g1 + %lo(sparc_execve), %g0 add %sp, STACK_BIAS + REGWIN_SZ, %o0 +sys32_execve: + sethi %hi(sparc32_execve), %g1 + add %g1, %g4, %g1 + jmpl %g1 + %lo(sparc32_execve), %g0 + add %sp, STACK_BIAS + REGWIN_SZ, %o0 + sys_sigpause: /* NOTE: %o0 has a correct value already */ call do_sigpause @@ -199,7 +234,7 @@ sys_sigsuspend: ld [%curptr + AOFF_task_flags], %l5 andcc %l5, 0x20, %g0 - be,pt %icc, ret_sys_call + be,pt %icc, rtrap nop call syscall_trace nop @@ -211,13 +246,25 @@ sys_sigreturn: ld [%curptr + AOFF_task_flags], %l5 andcc %l5, 0x20, %g0 - be,pt %icc, ret_sys_call + be,pt %icc, rtrap nop call syscall_trace nop ba,a,pt %xcc, rtrap - /* This is how fork() was meant to be done, 11 instruction entry. -DaveM */ +sys_ptrace: + call do_ptrace + add %sp, STACK_BIAS + REGWIN_SZ, %o0 + + ld [%curptr + AOFF_task_flags], %l5 + andcc %l5, 0x20, %g0 + be,pt %icc, rtrap + nop + call syscall_trace + nop + ba,a,pt %xcc, rtrap + + /* This is how fork() was meant to be done, 10 instruction entry. -DaveM */ .globl sys_fork, sys_vfork, sys_clone sys_fork: sys_vfork: @@ -228,13 +275,12 @@ sys_clone: flushw rdpr %cwp, %o4 add %sp, STACK_BIAS + REGWIN_SZ, %o2 - brz,a %o1, 1f - mov %fp, %o1 -1: + movrz %o1, %fp, %o1 + /* Don't try this at home. */ stx %o4, [%sp + STACK_BIAS + REGWIN_SZ + PT_V9_G0] call do_fork - add %l5, 8, %o7 + mov %l5, %o7 linux_sparc_ni_syscall: sethi %hi(sys_ni_syscall), %l7 @@ -281,6 +327,11 @@ linux_sparc_syscall: .globl syscall_is_too_hard syscall_is_too_hard: +#ifdef SYSCALL_TRACING /* Debugging... */ + mov %g1, %o0 ! o0=scall, o1=ptregs + call syscall_trace_entry + add %sp, STACK_BIAS + REGWIN_SZ, %o1 +#endif mov %i0, %o0 mov %i1, %o1 mov %i2, %o2 @@ -295,13 +346,12 @@ syscall_is_too_hard: call %l7 mov %i5, %o5 - stx %o0, [%sp + STACK_BIAS + REGWIN_SZ + PT_V9_I0] -#if 0 - /* Debugging... */ - call syscall_trace_exit - add %sp, STACK_BIAS + REGWIN_SZ, %o0 - ldx [%sp + STACK_BIAS + REGWIN_SZ + PT_V9_I0], %o0 +#ifdef SYSCALL_TRACING /* Debugging... */ + call syscall_trace_exit ! o0=sysret, o1=ptregs + add %sp, STACK_BIAS + REGWIN_SZ, %o1 #endif + stx %o0, [%sp + STACK_BIAS + REGWIN_SZ + PT_V9_I0] + .globl ret_sys_call ret_sys_call: ldx [%curptr + AOFF_task_flags], %l6 |