map.c

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// SPDX-License-Identifier: GPL-2.0
#include <elf.h>
#include <inttypes.h>
#include <sys/ttydefaults.h>
#include <string.h>
#include <linux/bitops.h>
#include "../../util/util.h"
#include "../../util/debug.h"
#include "../../util/symbol.h"
#include "../browser.h"
#include "../helpline.h"
#include "../keysyms.h"
#include "map.h"

#include "sane_ctype.h"

struct map_browser {
    struct ui_browser b;
    struct map    *map;
    u8        addrlen;
};

static void map_browser__write(struct ui_browser *browser, void *nd, int row)
{
    struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
    struct map_browser *mb = container_of(browser, struct map_browser, b);
    bool current_entry = ui_browser__is_current_entry(browser, row);
    int width;

    ui_browser__set_percent_color(browser, 0, current_entry);
    ui_browser__printf(browser, "%*" PRIx64 " %*" PRIx64 " %c ",
               mb->addrlen, sym->start, mb->addrlen, sym->end,
               sym->binding == STB_GLOBAL ? 'g' :
                sym->binding == STB_LOCAL  ? 'l' : 'w');
    width = browser->width - ((mb->addrlen * 2) + 4);
    if (width > 0)
        ui_browser__write_nstring(browser, sym->name, width);
}

/* FIXME uber-kludgy, see comment on cmd_report... */
static u32 *symbol__browser_index(struct symbol *browser)
{
    return ((void *)browser) - sizeof(struct rb_node) - sizeof(u32);
}

static int map_browser__search(struct map_browser *browser)
{
    char target[512];
    struct symbol *sym;
    int err = ui_browser__input_window("Search by name/addr",
                       "Prefix with 0x to search by address",
                       target, "ENTER: OK, ESC: Cancel", 0);
    if (err != K_ENTER)
        return -1;

    if (target[0] == '0' && tolower(target[1]) == 'x') {
        u64 addr = strtoull(target, NULL, 16);
        sym = map__find_symbol(browser->map, addr);
    } else
        sym = map__find_symbol_by_name(browser->map, target);

    if (sym != NULL) {
        u32 *idx = symbol__browser_index(sym);

        browser->b.top = &sym->rb_node;
        browser->b.index = browser->b.top_idx = *idx;
    } else
        ui_helpline__fpush("%s not found!", target);

    return 0;
}

static int map_browser__run(struct map_browser *browser)
{
    int key;

    if (ui_browser__show(&browser->b, browser->map->dso->long_name,
                 "Press ESC to exit, %s / to search",
                 verbose > 0 ? "" : "restart with -v to use") < 0)
        return -1;

    while (1) {
        key = ui_browser__run(&browser->b, 0);

        switch (key) {
        case '/':
            if (verbose > 0)
                map_browser__search(browser);
        default:
            break;
                case K_LEFT:
                case K_ESC:
                case 'q':
                case CTRL('c'):
                        goto out;
        }
    }
out:
    ui_browser__hide(&browser->b);
    return key;
}

int map__browse(struct map *map)
{
    struct map_browser mb = {
        .b = {
            .entries = &map->dso->symbols,
            .refresh = ui_browser__rb_tree_refresh,
            .seek    = ui_browser__rb_tree_seek,
            .write   = map_browser__write,
        },
        .map = map,
    };
    struct rb_node *nd;
    char tmp[BITS_PER_LONG / 4];
    u64 maxaddr = 0;

    for (nd = rb_first(mb.b.entries); nd; nd = rb_next(nd)) {
        struct symbol *pos = rb_entry(nd, struct symbol, rb_node);

        if (maxaddr < pos->end)
            maxaddr = pos->end;
        if (verbose > 0) {
            u32 *idx = symbol__browser_index(pos);
            *idx = mb.b.nr_entries;
        }
        ++mb.b.nr_entries;
    }

    mb.addrlen = snprintf(tmp, sizeof(tmp), "%" PRIx64, maxaddr);
    return map_browser__run(&mb);
}