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authorEddie Hung <eddie@fpgeh.com>2020-04-20 15:42:29 -0700
committerEddie Hung <eddie@fpgeh.com>2020-04-20 15:42:29 -0700
commit38ee59184ca50b37b4adacb957f553391b7769d4 (patch)
treeef52338f998c063b3489b7963637459bb428dfef /techlibs/intel/cycloneiv
parentc506da3819613fcfa5c0cfe73865ca0bacadb52c (diff)
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tests: remove write_ilang
Diffstat (limited to 'techlibs/intel/cycloneiv')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.3 (git 2.25.1) at 2025-12-01 18:46:54 +0000
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#include <xen/config.h>
#include <xen/spinlock.h>
#include <asm/uaccess.h>

#ifdef PERF_COUNTERS
#include <xen/sched.h>
#include <xen/perfc.h>
#include <asm/current.h>
#endif

extern struct exception_table_entry __start___ex_table[];
extern struct exception_table_entry __stop___ex_table[];
extern struct exception_table_entry __start___pre_ex_table[];
extern struct exception_table_entry __stop___pre_ex_table[];

static void sort_exception_table(struct exception_table_entry *start,
                                 struct exception_table_entry *end)
{
    struct exception_table_entry *p, *q, tmp;

    for ( p = start; p < end; p++ )
    {
        for ( q = p-1; q > start; q-- )
            if ( p->insn > q->insn )
                break;
        if ( ++q != p )
        {
            tmp = *p;
            memmove(q+1, q, (p-q)*sizeof(*p));
            *q = tmp;
        }
    }
}

void sort_exception_tables(void)
{
    sort_exception_table(__start___ex_table, __stop___ex_table);
    sort_exception_table(__start___pre_ex_table, __stop___pre_ex_table);
}

static inline unsigned long
search_one_table(const struct exception_table_entry *first,
                 const struct exception_table_entry *last,
                 unsigned long value)
{
    const struct exception_table_entry *mid;
    long diff;

    while ( first <= last )
    {
        mid = (last - first) / 2 + first;
        diff = mid->insn - value;
        if (diff == 0)
            return mid->fixup;
        else if (diff < 0)
            first = mid+1;
        else
            last = mid-1;
    }
    return 0;
}

unsigned long
search_exception_table(unsigned long addr)
{
    return search_one_table(
        __start___ex_table, __stop___ex_table-1, addr);
}

unsigned long
search_pre_exception_table(struct cpu_user_regs *regs)
{
    unsigned long addr = (unsigned long)regs->eip;
    unsigned long fixup = search_one_table(
        __start___pre_ex_table, __stop___pre_ex_table-1, addr);
    dprintk(XENLOG_INFO, "Pre-exception: %p -> %p\n", _p(addr), _p(fixup));
#ifdef PERF_COUNTERS
    if ( fixup )
        perfc_incrc(exception_fixed);
#endif
    return fixup;
}