diff options
Diffstat (limited to 'linux-user/elfload.c')
| -rw-r--r-- | linux-user/elfload.c | 35 |
1 files changed, 29 insertions, 6 deletions
diff --git a/linux-user/elfload.c b/linux-user/elfload.c index d3274ed..99829fa 100644 --- a/linux-user/elfload.c +++ b/linux-user/elfload.c @@ -2267,6 +2267,9 @@ static void pgb_have_guest_base(const char *image_name, abi_ulong guest_loaddr, if (test != addr) { pgb_fail_in_use(image_name); } + qemu_log_mask(CPU_LOG_PAGE, + "%s: base @ %p for " TARGET_ABI_FMT_ld " bytes\n", + __func__, addr, guest_hiaddr - guest_loaddr); } /** @@ -2309,6 +2312,9 @@ static uintptr_t pgd_find_hole_fallback(uintptr_t guest_size, uintptr_t brk, if (mmap_start != MAP_FAILED) { munmap(mmap_start, guest_size); if (mmap_start == (void *) align_start) { + qemu_log_mask(CPU_LOG_PAGE, + "%s: base @ %p for %" PRIdPTR" bytes\n", + __func__, mmap_start + offset, guest_size); return (uintptr_t) mmap_start + offset; } } @@ -2333,8 +2339,7 @@ static uintptr_t pgb_find_hole(uintptr_t guest_loaddr, uintptr_t guest_size, brk = (uintptr_t)sbrk(0); if (!maps) { - ret = pgd_find_hole_fallback(guest_size, brk, align, offset); - return ret == -1 ? -1 : ret - guest_loaddr; + return pgd_find_hole_fallback(guest_size, brk, align, offset); } /* The first hole is before the first map entry. */ @@ -2374,7 +2379,7 @@ static uintptr_t pgb_find_hole(uintptr_t guest_loaddr, uintptr_t guest_size, /* Record the lowest successful match. */ if (ret < 0) { - ret = align_start - guest_loaddr; + ret = align_start; } /* If this hole contains the identity map, select it. */ if (align_start <= guest_loaddr && @@ -2388,6 +2393,12 @@ static uintptr_t pgb_find_hole(uintptr_t guest_loaddr, uintptr_t guest_size, } free_self_maps(maps); + if (ret != -1) { + qemu_log_mask(CPU_LOG_PAGE, "%s: base @ %" PRIxPTR + " for %" PRIuPTR " bytes\n", + __func__, ret, guest_size); + } + return ret; } @@ -2439,6 +2450,9 @@ static void pgb_static(const char *image_name, abi_ulong orig_loaddr, } guest_base = addr; + + qemu_log_mask(CPU_LOG_PAGE, "%s: base @ %"PRIxPTR" for %" PRIuPTR" bytes\n", + __func__, addr, hiaddr - loaddr); } static void pgb_dynamic(const char *image_name, long align) @@ -2495,6 +2509,9 @@ static void pgb_reserved_va(const char *image_name, abi_ulong guest_loaddr, "using -R option)", reserved_va, test, strerror(errno)); exit(EXIT_FAILURE); } + + qemu_log_mask(CPU_LOG_PAGE, "%s: base @ %p for %lu bytes\n", + __func__, addr, reserved_va); } void probe_guest_base(const char *image_name, abi_ulong guest_loaddr, @@ -2783,11 +2800,17 @@ static void load_elf_image(const char *image_name, int image_fd, * and the stack, lest they be placed immediately after * the data segment and block allocation from the brk. * - * 16MB is chosen as "large enough" without being so large - * as to allow the result to not fit with a 32-bit guest on - * a 32-bit host. + * 16MB is chosen as "large enough" without being so large as + * to allow the result to not fit with a 32-bit guest on a + * 32-bit host. However some 64 bit guests (e.g. s390x) + * attempt to place their heap further ahead and currently + * nothing stops them smashing into QEMUs address space. */ +#if TARGET_LONG_BITS == 64 + info->reserve_brk = 32 * MiB; +#else info->reserve_brk = 16 * MiB; +#endif hiaddr += info->reserve_brk; if (ehdr->e_type == ET_EXEC) { |