Revision 68a1c816 linux-user/main.c
| b/linux-user/main.c | ||
|---|---|---|
| 44 | 44 |
#if defined(CONFIG_USE_GUEST_BASE) |
| 45 | 45 |
unsigned long guest_base; |
| 46 | 46 |
int have_guest_base; |
| 47 |
unsigned long reserved_va; |
|
| 47 | 48 |
#endif |
| 48 | 49 |
|
| 49 | 50 |
static const char *interp_prefix = CONFIG_QEMU_PREFIX; |
| ... | ... | |
| 2610 | 2611 |
"-0 argv0 forces target process argv[0] to be argv0\n" |
| 2611 | 2612 |
#if defined(CONFIG_USE_GUEST_BASE) |
| 2612 | 2613 |
"-B address set guest_base address to address\n" |
| 2614 |
"-R size reserve size bytes for guest virtual address space\n" |
|
| 2613 | 2615 |
#endif |
| 2614 | 2616 |
"\n" |
| 2615 | 2617 |
"Debug options:\n" |
| ... | ... | |
| 2805 | 2807 |
} else if (!strcmp(r, "B")) {
|
| 2806 | 2808 |
guest_base = strtol(argv[optind++], NULL, 0); |
| 2807 | 2809 |
have_guest_base = 1; |
| 2810 |
} else if (!strcmp(r, "R")) {
|
|
| 2811 |
char *p; |
|
| 2812 |
int shift = 0; |
|
| 2813 |
reserved_va = strtoul(argv[optind++], &p, 0); |
|
| 2814 |
switch (*p) {
|
|
| 2815 |
case 'k': |
|
| 2816 |
case 'K': |
|
| 2817 |
shift = 10; |
|
| 2818 |
break; |
|
| 2819 |
case 'M': |
|
| 2820 |
shift = 20; |
|
| 2821 |
break; |
|
| 2822 |
case 'G': |
|
| 2823 |
shift = 30; |
|
| 2824 |
break; |
|
| 2825 |
} |
|
| 2826 |
if (shift) {
|
|
| 2827 |
unsigned long unshifted = reserved_va; |
|
| 2828 |
p++; |
|
| 2829 |
reserved_va <<= shift; |
|
| 2830 |
if (((reserved_va >> shift) != unshifted) |
|
| 2831 |
#if HOST_LONG_BITS > TARGET_VIRT_ADDR_SPACE_BITS |
|
| 2832 |
|| (reserved_va > (1ul << TARGET_VIRT_ADDR_SPACE_BITS)) |
|
| 2833 |
#endif |
|
| 2834 |
) {
|
|
| 2835 |
fprintf(stderr, "Reserved virtual address too big\n"); |
|
| 2836 |
exit(1); |
|
| 2837 |
} |
|
| 2838 |
} |
|
| 2839 |
if (*p) {
|
|
| 2840 |
fprintf(stderr, "Unrecognised -R size suffix '%s'\n", p); |
|
| 2841 |
exit(1); |
|
| 2842 |
} |
|
| 2808 | 2843 |
#endif |
| 2809 | 2844 |
} else if (!strcmp(r, "drop-ld-preload")) {
|
| 2810 | 2845 |
(void) envlist_unsetenv(envlist, "LD_PRELOAD"); |
| ... | ... | |
| 2893 | 2928 |
* proper page alignment for guest_base. |
| 2894 | 2929 |
*/ |
| 2895 | 2930 |
guest_base = HOST_PAGE_ALIGN(guest_base); |
| 2931 |
|
|
| 2932 |
if (reserved_va) {
|
|
| 2933 |
void *p; |
|
| 2934 |
int flags; |
|
| 2935 |
|
|
| 2936 |
flags = MAP_ANONYMOUS | MAP_PRIVATE | MAP_NORESERVE; |
|
| 2937 |
if (have_guest_base) {
|
|
| 2938 |
flags |= MAP_FIXED; |
|
| 2939 |
} |
|
| 2940 |
p = mmap((void *)guest_base, reserved_va, PROT_NONE, flags, -1, 0); |
|
| 2941 |
if (p == MAP_FAILED) {
|
|
| 2942 |
fprintf(stderr, "Unable to reserve guest address space\n"); |
|
| 2943 |
exit(1); |
|
| 2944 |
} |
|
| 2945 |
guest_base = (unsigned long)p; |
|
| 2946 |
/* Make sure the address is properly aligned. */ |
|
| 2947 |
if (guest_base & ~qemu_host_page_mask) {
|
|
| 2948 |
munmap(p, reserved_va); |
|
| 2949 |
p = mmap((void *)guest_base, reserved_va + qemu_host_page_size, |
|
| 2950 |
PROT_NONE, flags, -1, 0); |
|
| 2951 |
if (p == MAP_FAILED) {
|
|
| 2952 |
fprintf(stderr, "Unable to reserve guest address space\n"); |
|
| 2953 |
exit(1); |
|
| 2954 |
} |
|
| 2955 |
guest_base = HOST_PAGE_ALIGN((unsigned long)p); |
|
| 2956 |
} |
|
| 2957 |
qemu_log("Reserved 0x%lx bytes of guest address space\n", reserved_va);
|
|
| 2958 |
} |
|
| 2896 | 2959 |
#endif /* CONFIG_USE_GUEST_BASE */ |
| 2897 | 2960 |
|
| 2898 | 2961 |
/* |
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