diff options
Diffstat (limited to 'linux-user/main.c')
| -rw-r--r-- | linux-user/main.c | 43 |
1 files changed, 25 insertions, 18 deletions
diff --git a/linux-user/main.c b/linux-user/main.c index c257b063db..24cb24f0bf 100644 --- a/linux-user/main.c +++ b/linux-user/main.c @@ -77,12 +77,12 @@ int have_guest_base; (TARGET_LONG_BITS == 32 || defined(TARGET_ABI32)) /* There are a number of places where we assign reserved_va to a variable of type abi_ulong and expect it to fit. Avoid the last page. */ -# define MAX_RESERVED_VA (0xfffffffful & TARGET_PAGE_MASK) +# define MAX_RESERVED_VA(CPU) (0xfffffffful & TARGET_PAGE_MASK) # else -# define MAX_RESERVED_VA (1ul << TARGET_VIRT_ADDR_SPACE_BITS) +# define MAX_RESERVED_VA(CPU) (1ul << TARGET_VIRT_ADDR_SPACE_BITS) # endif # else -# define MAX_RESERVED_VA 0 +# define MAX_RESERVED_VA(CPU) 0 # endif #endif @@ -356,8 +356,7 @@ static void handle_arg_reserved_va(const char *arg) unsigned long unshifted = reserved_va; p++; reserved_va <<= shift; - if (reserved_va >> shift != unshifted - || (MAX_RESERVED_VA && reserved_va > MAX_RESERVED_VA)) { + if (reserved_va >> shift != unshifted) { fprintf(stderr, "Reserved virtual address too big\n"); exit(EXIT_FAILURE); } @@ -605,6 +604,7 @@ int main(int argc, char **argv, char **envp) int i; int ret; int execfd; + unsigned long max_reserved_va; error_init(argv[0]); module_call_init(MODULE_INIT_TRACE); @@ -670,24 +670,31 @@ int main(int argc, char **argv, char **envp) /* init tcg before creating CPUs and to get qemu_host_page_size */ tcg_exec_init(0); - /* Reserving *too* much vm space via mmap can run into problems - with rlimits, oom due to page table creation, etc. We will still try it, - if directed by the command-line option, but not by default. */ - if (HOST_LONG_BITS == 64 && - TARGET_VIRT_ADDR_SPACE_BITS <= 32 && - reserved_va == 0) { - /* reserved_va must be aligned with the host page size - * as it is used with mmap() - */ - reserved_va = MAX_RESERVED_VA & qemu_host_page_mask; - } - cpu = cpu_create(cpu_type); env = cpu->env_ptr; cpu_reset(cpu); - thread_cpu = cpu; + /* + * Reserving too much vm space via mmap can run into problems + * with rlimits, oom due to page table creation, etc. We will + * still try it, if directed by the command-line option, but + * not by default. + */ + max_reserved_va = MAX_RESERVED_VA(cpu); + if (reserved_va != 0) { + if (max_reserved_va && reserved_va > max_reserved_va) { + fprintf(stderr, "Reserved virtual address too big\n"); + exit(EXIT_FAILURE); + } + } else if (HOST_LONG_BITS == 64 && TARGET_VIRT_ADDR_SPACE_BITS <= 32) { + /* + * reserved_va must be aligned with the host page size + * as it is used with mmap() + */ + reserved_va = max_reserved_va & qemu_host_page_mask; + } + if (getenv("QEMU_STRACE")) { do_strace = 1; } |