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sh: Kill off sh64's hand-rolled syscall tracer.

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This is no longer necessary, as there are now sufficient generic
alternatives available.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt
2009-05-08 17:25:35 +09:00
parent 1af2fe45fe
commit cb3a86c89e
5 changed files with 2 additions and 232 deletions
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134
arch/sh/lib64/dbg.c
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@@ -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)
{