diff options
| -rw-r--r-- | arch/sh/Kconfig.debug | 8 | ||||
| -rw-r--r-- | arch/sh/Makefile | 34 | ||||
| -rw-r--r-- | arch/sh/kernel/cpu/sh5/entry.S | 57 | ||||
| -rw-r--r-- | arch/sh/lib64/.gitignore | 1 | ||||
| -rw-r--r-- | arch/sh/lib64/dbg.c | 134 |
5 files changed, 2 insertions, 232 deletions
diff --git a/arch/sh/Kconfig.debug b/arch/sh/Kconfig.debug index fafa907e14ac..44627ef52541 100644 --- a/arch/sh/Kconfig.debug +++ b/arch/sh/Kconfig.debug @@ -137,12 +137,4 @@ config SH64_SR_WATCH bool "Debug: set SR.WATCH to enable hardware watchpoints and trace" depends on SUPERH64 -config POOR_MANS_STRACE - bool "Debug: enable rudimentary strace facility" - depends on SUPERH64 - help - This option allows system calls to be traced to the console. It also - aids in detecting kernel stack underflow. It is useful for debugging - early-userland problems (e.g. init incurring fatal exceptions.) - endmenu diff --git a/arch/sh/Makefile b/arch/sh/Makefile index bece1f7535f2..493da979eff1 100644 --- a/arch/sh/Makefile +++ b/arch/sh/Makefile @@ -193,7 +193,7 @@ zImage uImage uImage.srec vmlinux.srec: vmlinux compressed: zImage -archprepare: maketools arch/sh/lib64/syscalltab.h +archprepare: maketools archclean: $(Q)$(MAKE) $(clean)=$(boot) @@ -205,34 +205,4 @@ define archhelp @echo ' uImage.srec - Create an S-record for U-Boot' endef -define filechk_gen-syscalltab - (set -e; \ - echo "/*"; \ - echo " * DO NOT MODIFY."; \ - echo " *"; \ - echo " * This file was generated by arch/sh/Makefile"; \ - echo " * Any changes will be reverted at build time."; \ - echo " */"; \ - echo ""; \ - echo "#ifndef __SYSCALLTAB_H"; \ - echo "#define __SYSCALLTAB_H"; \ - echo ""; \ - echo "#include <linux/kernel.h>"; \ - echo ""; \ - echo "struct syscall_info {"; \ - echo " const char *name;"; \ - echo "} syscall_info_table[] = {"; \ - sed -e '/^.*\.long /!d;s// { "/;s/\(\([^/]*\)\/\)\{1\}.*/\2/; \ - s/[ \t]*$$//g;s/$$/" },/;s/\("\)sys_/\1/g'; \ - echo "};"; \ - echo ""; \ - echo "#define NUM_SYSCALL_INFO_ENTRIES ARRAY_SIZE(syscall_info_table)";\ - echo ""; \ - echo "#endif /* __SYSCALLTAB_H */" ) -endef - -arch/sh/lib64/syscalltab.h: arch/sh/kernel/syscalls_64.S - $(call filechk,gen-syscalltab) - -CLEAN_FILES += arch/sh/lib64/syscalltab.h \ - include/asm-sh/machtypes.h +CLEAN_FILES += include/asm-sh/machtypes.h diff --git a/arch/sh/kernel/cpu/sh5/entry.S b/arch/sh/kernel/cpu/sh5/entry.S index 516297515b25..b0aacf675258 100644 --- a/arch/sh/kernel/cpu/sh5/entry.S +++ b/arch/sh/kernel/cpu/sh5/entry.S @@ -812,27 +812,6 @@ no_underflow: ! exceptions add SP, ZERO, r14 -#ifdef CONFIG_POOR_MANS_STRACE - /* We've pushed all the registers now, so only r2-r4 hold anything - * useful. Move them into callee save registers */ - or r2, ZERO, r28 - or r3, ZERO, r29 - or r4, ZERO, r30 - - /* Preserve r2 as the event code */ - movi evt_debug, r3 - ori r3, 1, r3 - ptabs r3, tr0 - - or SP, ZERO, r6 - getcon TRA, r5 - blink tr0, LINK - - or r28, ZERO, r2 - or r29, ZERO, r3 - or r30, ZERO, r4 -#endif - /* For syscall and debug race condition, get TRA now */ getcon TRA, r5 @@ -887,11 +866,6 @@ no_underflow: */ .global ret_from_irq ret_from_irq: -#ifdef CONFIG_POOR_MANS_STRACE - pta evt_debug_ret_from_irq, tr0 - ori SP, 0, r2 - blink tr0, LINK -#endif ld.q SP, FRAME_S(FSSR), r6 shlri r6, 30, r6 andi r6, 1, r6 @@ -905,12 +879,6 @@ ret_from_irq: ret_from_exception: preempt_stop() -#ifdef CONFIG_POOR_MANS_STRACE - pta evt_debug_ret_from_exc, tr0 - ori SP, 0, r2 - blink tr0, LINK -#endif - ld.q SP, FRAME_S(FSSR), r6 shlri r6, 30, r6 andi r6, 1, r6 @@ -1236,18 +1204,6 @@ syscall_bad: .global syscall_ret syscall_ret: st.q SP, FRAME_R(9), r2 /* Expecting SP back to BASIC frame */ - -#ifdef CONFIG_POOR_MANS_STRACE - /* nothing useful in registers at this point */ - - movi evt_debug2, r5 - ori r5, 1, r5 - ptabs r5, tr0 - ld.q SP, FRAME_R(9), r2 - or SP, ZERO, r3 - blink tr0, LINK -#endif - ld.q SP, FRAME_S(FSPC), r2 addi r2, 4, r2 /* Move PC, being pre-execution event */ st.q SP, FRAME_S(FSPC), r2 @@ -1268,25 +1224,12 @@ ret_from_fork: ptabs r5, tr0 blink tr0, LINK -#ifdef CONFIG_POOR_MANS_STRACE - /* nothing useful in registers at this point */ - - movi evt_debug2, r5 - ori r5, 1, r5 - ptabs r5, tr0 - ld.q SP, FRAME_R(9), r2 - or SP, ZERO, r3 - blink tr0, LINK -#endif - ld.q SP, FRAME_S(FSPC), r2 addi r2, 4, r2 /* Move PC, being pre-execution event */ st.q SP, FRAME_S(FSPC), r2 pta ret_from_syscall, tr0 blink tr0, ZERO - - syscall_allowed: /* Use LINK to deflect the exit point, default is syscall_ret */ pta syscall_ret, tr0 diff --git a/arch/sh/lib64/.gitignore b/arch/sh/lib64/.gitignore deleted file mode 100644 index 3508c2cb23c4..000000000000 --- a/arch/sh/lib64/.gitignore +++ /dev/null @@ -1 +0,0 @@ -syscalltab.h diff --git a/arch/sh/lib64/dbg.c b/arch/sh/lib64/dbg.c index 2fb8eaf6de60..25f2481bd89e 100644 --- a/arch/sh/lib64/dbg.c +++ b/arch/sh/lib64/dbg.c @@ -135,140 +135,6 @@ void print_itlb(void) (" =============================================================\n"); } -/* ======================================================================= */ - -#ifdef CONFIG_POOR_MANS_STRACE - -#include "syscalltab.h" - -struct ring_node { - int evt; - int ret_addr; - int event; - int tra; - int pid; - unsigned long sp; - unsigned long pc; -}; - -static struct ring_node event_ring[16]; -static int event_ptr = 0; - -struct stored_syscall_data { - int pid; - int syscall_number; -}; - -#define N_STORED_SYSCALLS 16 - -static struct stored_syscall_data stored_syscalls[N_STORED_SYSCALLS]; -static int syscall_next=0; -static int syscall_next_print=0; - -void evt_debug(int evt, int ret_addr, int event, int tra, struct pt_regs *regs) -{ - int syscallno = tra & 0xff; - unsigned long sp; - unsigned long stack_bottom; - int pid; - struct ring_node *rr; - - pid = current->pid; - stack_bottom = (unsigned long) task_stack_page(current); - asm volatile("ori r15, 0, %0" : "=r" (sp)); - rr = event_ring + event_ptr; - rr->evt = evt; - rr->ret_addr = ret_addr; - rr->event = event; - rr->tra = tra; - rr->pid = pid; - rr->sp = sp; - rr->pc = regs->pc; - - if (sp < stack_bottom + 3092) { - int i, j; - printk("evt_debug : stack underflow report\n"); - for (j=0, i = event_ptr; j<16; j++) { - rr = event_ring + i; - printk("evt=%08x event=%08x tra=%08x pid=%5d sp=%08lx pc=%08lx\n", - rr->evt, rr->event, rr->tra, rr->pid, rr->sp, rr->pc); - i--; - i &= 15; - } - panic("STACK UNDERFLOW\n"); - } - - event_ptr = (event_ptr + 1) & 15; - - if ((event == 2) && (evt == 0x160)) { - if (syscallno < NUM_SYSCALL_INFO_ENTRIES) { - /* Store the syscall information to print later. We - * can't print this now - currently we're running with - * SR.BL=1, so we can't take a tlbmiss (which could occur - * in the console drivers under printk). - * - * Just overwrite old entries on ring overflow - this - * is only for last-hope debugging. */ - stored_syscalls[syscall_next].pid = current->pid; - stored_syscalls[syscall_next].syscall_number = syscallno; - syscall_next++; - syscall_next &= (N_STORED_SYSCALLS - 1); - } - } -} - -static void drain_syscalls(void) { - while (syscall_next_print != syscall_next) { - printk("Task %d: %s()\n", - stored_syscalls[syscall_next_print].pid, - syscall_info_table[stored_syscalls[syscall_next_print].syscall_number].name); - syscall_next_print++; - syscall_next_print &= (N_STORED_SYSCALLS - 1); - } -} - -void evt_debug2(unsigned int ret) -{ - drain_syscalls(); - printk("Task %d: syscall returns %08x\n", current->pid, ret); -} - -void evt_debug_ret_from_irq(struct pt_regs *regs) -{ - int pid; - struct ring_node *rr; - - pid = current->pid; - rr = event_ring + event_ptr; - rr->evt = 0xffff; - rr->ret_addr = 0; - rr->event = 0; - rr->tra = 0; - rr->pid = pid; - rr->pc = regs->pc; - event_ptr = (event_ptr + 1) & 15; -} - -void evt_debug_ret_from_exc(struct pt_regs *regs) -{ - int pid; - struct ring_node *rr; - - pid = current->pid; - rr = event_ring + event_ptr; - rr->evt = 0xfffe; - rr->ret_addr = 0; - rr->event = 0; - rr->tra = 0; - rr->pid = pid; - rr->pc = regs->pc; - event_ptr = (event_ptr + 1) & 15; -} - -#endif /* CONFIG_POOR_MANS_STRACE */ - -/* ======================================================================= */ - void show_excp_regs(char *from, int trapnr, int signr, struct pt_regs *regs) { |