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author | David S. Miller <davem@sunset.davemloft.net> | 2005-09-28 20:21:11 -0700 |
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committer | David S. Miller <davem@sunset.davemloft.net> | 2005-09-28 20:21:11 -0700 |
commit | 8cf14af0a740fb7e9f94a203b5a989beb875d58f (patch) | |
tree | a7bec4d60c352e780d6a2b75e9b95e637e3a14f7 /arch/sparc64/kernel | |
parent | 705747ab87c96f1b4b8e73ba617c323d9087f6ac (diff) | |
download | lwn-8cf14af0a740fb7e9f94a203b5a989beb875d58f.tar.gz lwn-8cf14af0a740fb7e9f94a203b5a989beb875d58f.zip |
[SPARC64]: Convert to use generic exception table support.
The funny "range" exception table entries we had were only
used by the compat layer socketcall assembly, and it wasn't
even needed there.
For free we now get proper exception table sorting and fast
binary searching.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64/kernel')
-rw-r--r-- | arch/sparc64/kernel/sys32.S | 145 | ||||
-rw-r--r-- | arch/sparc64/kernel/traps.c | 24 | ||||
-rw-r--r-- | arch/sparc64/kernel/unaligned.c | 9 |
3 files changed, 95 insertions, 83 deletions
diff --git a/arch/sparc64/kernel/sys32.S b/arch/sparc64/kernel/sys32.S index 5f9e4fae612e..4fb99e0bc7c3 100644 --- a/arch/sparc64/kernel/sys32.S +++ b/arch/sparc64/kernel/sys32.S @@ -158,163 +158,163 @@ sys32_socketcall: /* %o0=call, %o1=args */ jmpl %g2 + %o0, %g0 nop - /* Each entry is exactly 32 bytes. */ .align 32 __socketcall_table_begin: + + /* Each entry is exactly 32 bytes. */ do_sys_socket: /* sys_socket(int, int, int) */ - ldswa [%o1 + 0x0] %asi, %o0 +1: ldswa [%o1 + 0x0] %asi, %o0 sethi %hi(sys_socket), %g1 - ldswa [%o1 + 0x8] %asi, %o2 +2: ldswa [%o1 + 0x8] %asi, %o2 jmpl %g1 + %lo(sys_socket), %g0 - ldswa [%o1 + 0x4] %asi, %o1 +3: ldswa [%o1 + 0x4] %asi, %o1 nop nop nop do_sys_bind: /* sys_bind(int fd, struct sockaddr *, int) */ - ldswa [%o1 + 0x0] %asi, %o0 +4: ldswa [%o1 + 0x0] %asi, %o0 sethi %hi(sys_bind), %g1 - ldswa [%o1 + 0x8] %asi, %o2 +5: ldswa [%o1 + 0x8] %asi, %o2 jmpl %g1 + %lo(sys_bind), %g0 - lduwa [%o1 + 0x4] %asi, %o1 +6: lduwa [%o1 + 0x4] %asi, %o1 nop nop nop do_sys_connect: /* sys_connect(int, struct sockaddr *, int) */ - ldswa [%o1 + 0x0] %asi, %o0 +7: ldswa [%o1 + 0x0] %asi, %o0 sethi %hi(sys_connect), %g1 - ldswa [%o1 + 0x8] %asi, %o2 +8: ldswa [%o1 + 0x8] %asi, %o2 jmpl %g1 + %lo(sys_connect), %g0 - lduwa [%o1 + 0x4] %asi, %o1 +9: lduwa [%o1 + 0x4] %asi, %o1 nop nop nop do_sys_listen: /* sys_listen(int, int) */ - ldswa [%o1 + 0x0] %asi, %o0 +10: ldswa [%o1 + 0x0] %asi, %o0 sethi %hi(sys_listen), %g1 jmpl %g1 + %lo(sys_listen), %g0 - ldswa [%o1 + 0x4] %asi, %o1 +11: ldswa [%o1 + 0x4] %asi, %o1 nop nop nop nop do_sys_accept: /* sys_accept(int, struct sockaddr *, int *) */ - ldswa [%o1 + 0x0] %asi, %o0 +12: ldswa [%o1 + 0x0] %asi, %o0 sethi %hi(sys_accept), %g1 - lduwa [%o1 + 0x8] %asi, %o2 +13: lduwa [%o1 + 0x8] %asi, %o2 jmpl %g1 + %lo(sys_accept), %g0 - lduwa [%o1 + 0x4] %asi, %o1 +14: lduwa [%o1 + 0x4] %asi, %o1 nop nop nop do_sys_getsockname: /* sys_getsockname(int, struct sockaddr *, int *) */ - ldswa [%o1 + 0x0] %asi, %o0 +15: ldswa [%o1 + 0x0] %asi, %o0 sethi %hi(sys_getsockname), %g1 - lduwa [%o1 + 0x8] %asi, %o2 +16: lduwa [%o1 + 0x8] %asi, %o2 jmpl %g1 + %lo(sys_getsockname), %g0 - lduwa [%o1 + 0x4] %asi, %o1 +17: lduwa [%o1 + 0x4] %asi, %o1 nop nop nop do_sys_getpeername: /* sys_getpeername(int, struct sockaddr *, int *) */ - ldswa [%o1 + 0x0] %asi, %o0 +18: ldswa [%o1 + 0x0] %asi, %o0 sethi %hi(sys_getpeername), %g1 - lduwa [%o1 + 0x8] %asi, %o2 +19: lduwa [%o1 + 0x8] %asi, %o2 jmpl %g1 + %lo(sys_getpeername), %g0 - lduwa [%o1 + 0x4] %asi, %o1 +20: lduwa [%o1 + 0x4] %asi, %o1 nop nop nop do_sys_socketpair: /* sys_socketpair(int, int, int, int *) */ - ldswa [%o1 + 0x0] %asi, %o0 +21: ldswa [%o1 + 0x0] %asi, %o0 sethi %hi(sys_socketpair), %g1 - ldswa [%o1 + 0x8] %asi, %o2 - lduwa [%o1 + 0xc] %asi, %o3 +22: ldswa [%o1 + 0x8] %asi, %o2 +23: lduwa [%o1 + 0xc] %asi, %o3 jmpl %g1 + %lo(sys_socketpair), %g0 - ldswa [%o1 + 0x4] %asi, %o1 +24: ldswa [%o1 + 0x4] %asi, %o1 nop nop do_sys_send: /* sys_send(int, void *, size_t, unsigned int) */ - ldswa [%o1 + 0x0] %asi, %o0 +25: ldswa [%o1 + 0x0] %asi, %o0 sethi %hi(sys_send), %g1 - lduwa [%o1 + 0x8] %asi, %o2 - lduwa [%o1 + 0xc] %asi, %o3 +26: lduwa [%o1 + 0x8] %asi, %o2 +27: lduwa [%o1 + 0xc] %asi, %o3 jmpl %g1 + %lo(sys_send), %g0 - lduwa [%o1 + 0x4] %asi, %o1 +28: lduwa [%o1 + 0x4] %asi, %o1 nop nop do_sys_recv: /* sys_recv(int, void *, size_t, unsigned int) */ - ldswa [%o1 + 0x0] %asi, %o0 +29: ldswa [%o1 + 0x0] %asi, %o0 sethi %hi(sys_recv), %g1 - lduwa [%o1 + 0x8] %asi, %o2 - lduwa [%o1 + 0xc] %asi, %o3 +30: lduwa [%o1 + 0x8] %asi, %o2 +31: lduwa [%o1 + 0xc] %asi, %o3 jmpl %g1 + %lo(sys_recv), %g0 - lduwa [%o1 + 0x4] %asi, %o1 +32: lduwa [%o1 + 0x4] %asi, %o1 nop nop do_sys_sendto: /* sys_sendto(int, u32, compat_size_t, unsigned int, u32, int) */ - ldswa [%o1 + 0x0] %asi, %o0 +33: ldswa [%o1 + 0x0] %asi, %o0 sethi %hi(sys_sendto), %g1 - lduwa [%o1 + 0x8] %asi, %o2 - lduwa [%o1 + 0xc] %asi, %o3 - lduwa [%o1 + 0x10] %asi, %o4 - ldswa [%o1 + 0x14] %asi, %o5 +34: lduwa [%o1 + 0x8] %asi, %o2 +35: lduwa [%o1 + 0xc] %asi, %o3 +36: lduwa [%o1 + 0x10] %asi, %o4 +37: ldswa [%o1 + 0x14] %asi, %o5 jmpl %g1 + %lo(sys_sendto), %g0 - lduwa [%o1 + 0x4] %asi, %o1 +38: lduwa [%o1 + 0x4] %asi, %o1 do_sys_recvfrom: /* sys_recvfrom(int, u32, compat_size_t, unsigned int, u32, u32) */ - ldswa [%o1 + 0x0] %asi, %o0 +39: ldswa [%o1 + 0x0] %asi, %o0 sethi %hi(sys_recvfrom), %g1 - lduwa [%o1 + 0x8] %asi, %o2 - lduwa [%o1 + 0xc] %asi, %o3 - lduwa [%o1 + 0x10] %asi, %o4 - lduwa [%o1 + 0x14] %asi, %o5 +40: lduwa [%o1 + 0x8] %asi, %o2 +41: lduwa [%o1 + 0xc] %asi, %o3 +42: lduwa [%o1 + 0x10] %asi, %o4 +43: lduwa [%o1 + 0x14] %asi, %o5 jmpl %g1 + %lo(sys_recvfrom), %g0 - lduwa [%o1 + 0x4] %asi, %o1 +44: lduwa [%o1 + 0x4] %asi, %o1 do_sys_shutdown: /* sys_shutdown(int, int) */ - ldswa [%o1 + 0x0] %asi, %o0 +45: ldswa [%o1 + 0x0] %asi, %o0 sethi %hi(sys_shutdown), %g1 jmpl %g1 + %lo(sys_shutdown), %g0 - ldswa [%o1 + 0x4] %asi, %o1 +46: ldswa [%o1 + 0x4] %asi, %o1 nop nop nop nop do_sys_setsockopt: /* compat_sys_setsockopt(int, int, int, char *, int) */ - ldswa [%o1 + 0x0] %asi, %o0 +47: ldswa [%o1 + 0x0] %asi, %o0 sethi %hi(compat_sys_setsockopt), %g1 - ldswa [%o1 + 0x8] %asi, %o2 - lduwa [%o1 + 0xc] %asi, %o3 - ldswa [%o1 + 0x10] %asi, %o4 +48: ldswa [%o1 + 0x8] %asi, %o2 +49: lduwa [%o1 + 0xc] %asi, %o3 +50: ldswa [%o1 + 0x10] %asi, %o4 jmpl %g1 + %lo(compat_sys_setsockopt), %g0 - ldswa [%o1 + 0x4] %asi, %o1 +51: ldswa [%o1 + 0x4] %asi, %o1 nop do_sys_getsockopt: /* compat_sys_getsockopt(int, int, int, u32, u32) */ - ldswa [%o1 + 0x0] %asi, %o0 +52: ldswa [%o1 + 0x0] %asi, %o0 sethi %hi(compat_sys_getsockopt), %g1 - ldswa [%o1 + 0x8] %asi, %o2 - lduwa [%o1 + 0xc] %asi, %o3 - lduwa [%o1 + 0x10] %asi, %o4 +53: ldswa [%o1 + 0x8] %asi, %o2 +54: lduwa [%o1 + 0xc] %asi, %o3 +55: lduwa [%o1 + 0x10] %asi, %o4 jmpl %g1 + %lo(compat_sys_getsockopt), %g0 - ldswa [%o1 + 0x4] %asi, %o1 +56: ldswa [%o1 + 0x4] %asi, %o1 nop do_sys_sendmsg: /* compat_sys_sendmsg(int, struct compat_msghdr *, unsigned int) */ - ldswa [%o1 + 0x0] %asi, %o0 +57: ldswa [%o1 + 0x0] %asi, %o0 sethi %hi(compat_sys_sendmsg), %g1 - lduwa [%o1 + 0x8] %asi, %o2 +58: lduwa [%o1 + 0x8] %asi, %o2 jmpl %g1 + %lo(compat_sys_sendmsg), %g0 - lduwa [%o1 + 0x4] %asi, %o1 +59: lduwa [%o1 + 0x4] %asi, %o1 nop nop nop do_sys_recvmsg: /* compat_sys_recvmsg(int, struct compat_msghdr *, unsigned int) */ - ldswa [%o1 + 0x0] %asi, %o0 +60: ldswa [%o1 + 0x0] %asi, %o0 sethi %hi(compat_sys_recvmsg), %g1 - lduwa [%o1 + 0x8] %asi, %o2 +61: lduwa [%o1 + 0x8] %asi, %o2 jmpl %g1 + %lo(compat_sys_recvmsg), %g0 - lduwa [%o1 + 0x4] %asi, %o1 +62: lduwa [%o1 + 0x4] %asi, %o1 nop nop nop -__socketcall_table_end: do_einval: retl @@ -325,5 +325,20 @@ do_efault: .section __ex_table .align 4 - .word __socketcall_table_begin, 0, __socketcall_table_end, do_efault + .word 1b, do_efault, 2b, do_efault, 3b, do_efault, 4b, do_efault + .word 5b, do_efault, 6b, do_efault, 7b, do_efault, 8b, do_efault + .word 9b, do_efault, 10b, do_efault, 11b, do_efault, 12b, do_efault + .word 13b, do_efault, 14b, do_efault, 15b, do_efault, 16b, do_efault + .word 17b, do_efault, 18b, do_efault, 19b, do_efault, 20b, do_efault + .word 21b, do_efault, 22b, do_efault, 23b, do_efault, 24b, do_efault + .word 25b, do_efault, 26b, do_efault, 27b, do_efault, 28b, do_efault + .word 29b, do_efault, 30b, do_efault, 31b, do_efault, 32b, do_efault + .word 33b, do_efault, 34b, do_efault, 35b, do_efault, 36b, do_efault + .word 37b, do_efault, 38b, do_efault, 39b, do_efault, 40b, do_efault + .word 41b, do_efault, 42b, do_efault, 43b, do_efault, 44b, do_efault + .word 45b, do_efault, 46b, do_efault, 47b, do_efault, 48b, do_efault + .word 49b, do_efault, 50b, do_efault, 51b, do_efault, 52b, do_efault + .word 53b, do_efault, 54b, do_efault, 55b, do_efault, 56b, do_efault + .word 57b, do_efault, 58b, do_efault, 59b, do_efault, 60b, do_efault + .word 61b, do_efault, 62b, do_efault .previous diff --git a/arch/sparc64/kernel/traps.c b/arch/sparc64/kernel/traps.c index f8e7005fede9..1aa15990f5af 100644 --- a/arch/sparc64/kernel/traps.c +++ b/arch/sparc64/kernel/traps.c @@ -189,19 +189,18 @@ void spitfire_data_access_exception(struct pt_regs *regs, unsigned long sfsr, un if (regs->tstate & TSTATE_PRIV) { /* Test if this comes from uaccess places. */ - unsigned long fixup; - unsigned long g2 = regs->u_regs[UREG_G2]; + const struct exception_table_entry *entry; - if ((fixup = search_extables_range(regs->tpc, &g2))) { - /* Ouch, somebody is trying ugly VM hole tricks on us... */ + entry = search_exception_tables(regs->tpc); + if (entry) { + /* Ouch, somebody is trying VM hole tricks on us... */ #ifdef DEBUG_EXCEPTIONS printk("Exception: PC<%016lx> faddr<UNKNOWN>\n", regs->tpc); - printk("EX_TABLE: insn<%016lx> fixup<%016lx> " - "g2<%016lx>\n", regs->tpc, fixup, g2); + printk("EX_TABLE: insn<%016lx> fixup<%016lx>\n", + regs->tpc, entry->fixup); #endif - regs->tpc = fixup; + regs->tpc = entry->fixup; regs->tnpc = regs->tpc + 4; - regs->u_regs[UREG_G2] = g2; return; } /* Shit... */ @@ -1610,10 +1609,10 @@ void cheetah_deferred_handler(struct pt_regs *regs, unsigned long afsr, unsigned /* OK, usermode access. */ recoverable = 1; } else { - unsigned long g2 = regs->u_regs[UREG_G2]; - unsigned long fixup = search_extables_range(regs->tpc, &g2); + const struct exception_table_entry *entry; - if (fixup != 0UL) { + entry = search_exception_tables(regs->tpc); + if (entry) { /* OK, kernel access to userspace. */ recoverable = 1; @@ -1632,9 +1631,8 @@ void cheetah_deferred_handler(struct pt_regs *regs, unsigned long afsr, unsigned * recoverable condition. */ if (recoverable) { - regs->tpc = fixup; + regs->tpc = entry->fixup; regs->tnpc = regs->tpc + 4; - regs->u_regs[UREG_G2] = g2; } } } diff --git a/arch/sparc64/kernel/unaligned.c b/arch/sparc64/kernel/unaligned.c index 02af08ffec8f..9d6be20f4125 100644 --- a/arch/sparc64/kernel/unaligned.c +++ b/arch/sparc64/kernel/unaligned.c @@ -246,10 +246,10 @@ void kernel_mna_trap_fault(void) { struct pt_regs *regs = current_thread_info()->kern_una_regs; unsigned int insn = current_thread_info()->kern_una_insn; - unsigned long g2 = regs->u_regs[UREG_G2]; - unsigned long fixup = search_extables_range(regs->tpc, &g2); + const struct exception_table_entry *entry; - if (!fixup) { + entry = search_exception_tables(regs->tpc); + if (!entry) { unsigned long address; address = compute_effective_address(regs, insn, @@ -270,9 +270,8 @@ void kernel_mna_trap_fault(void) die_if_kernel("Oops", regs); /* Not reached */ } - regs->tpc = fixup; + regs->tpc = entry->fixup; regs->tnpc = regs->tpc + 4; - regs->u_regs [UREG_G2] = g2; regs->tstate &= ~TSTATE_ASI; regs->tstate |= (ASI_AIUS << 24UL); |