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Diffstat (limited to 'arch/x86/ia32/ia32_aout.c')
-rw-r--r--arch/x86/ia32/ia32_aout.c183
1 files changed, 71 insertions, 112 deletions
diff --git a/arch/x86/ia32/ia32_aout.c b/arch/x86/ia32/ia32_aout.c
index 2d93bdbc9ac..d21ff89207c 100644
--- a/arch/x86/ia32/ia32_aout.c
+++ b/arch/x86/ia32/ia32_aout.c
@@ -25,8 +25,8 @@
#include <linux/personality.h>
#include <linux/init.h>
#include <linux/jiffies.h>
+#include <linux/perf_event.h>
-#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/pgalloc.h>
#include <asm/cacheflush.h>
@@ -34,14 +34,18 @@
#include <asm/ia32.h>
#undef WARN_OLD
-#undef CORE_DUMP /* definitely broken */
-static int load_aout_binary(struct linux_binprm *, struct pt_regs *regs);
+static int load_aout_binary(struct linux_binprm *);
static int load_aout_library(struct file *);
-#ifdef CORE_DUMP
-static int aout_core_dump(long signr, struct pt_regs *regs, struct file *file,
- unsigned long limit);
+#ifdef CONFIG_COREDUMP
+static int aout_core_dump(struct coredump_params *);
+
+static unsigned long get_dr(int n)
+{
+ struct perf_event *bp = current->thread.ptrace_bps[n];
+ return bp ? bp->hw.info.address : 0;
+}
/*
* fill in the user structure for a core dump..
@@ -49,6 +53,7 @@ static int aout_core_dump(long signr, struct pt_regs *regs, struct file *file,
static void dump_thread32(struct pt_regs *regs, struct user32 *dump)
{
u32 fs, gs;
+ memset(dump, 0, sizeof(*dump));
/* changed the size calculations - should hopefully work better. lbt */
dump->magic = CMAGIC;
@@ -58,15 +63,12 @@ static void dump_thread32(struct pt_regs *regs, struct user32 *dump)
dump->u_dsize = ((unsigned long)
(current->mm->brk + (PAGE_SIZE-1))) >> PAGE_SHIFT;
dump->u_dsize -= dump->u_tsize;
- dump->u_ssize = 0;
- dump->u_debugreg[0] = current->thread.debugreg0;
- dump->u_debugreg[1] = current->thread.debugreg1;
- dump->u_debugreg[2] = current->thread.debugreg2;
- dump->u_debugreg[3] = current->thread.debugreg3;
- dump->u_debugreg[4] = 0;
- dump->u_debugreg[5] = 0;
+ dump->u_debugreg[0] = get_dr(0);
+ dump->u_debugreg[1] = get_dr(1);
+ dump->u_debugreg[2] = get_dr(2);
+ dump->u_debugreg[3] = get_dr(3);
dump->u_debugreg[6] = current->thread.debugreg6;
- dump->u_debugreg[7] = current->thread.debugreg7;
+ dump->u_debugreg[7] = current->thread.ptrace_dr7;
if (dump->start_stack < 0xc0000000) {
unsigned long tmp;
@@ -75,24 +77,24 @@ static void dump_thread32(struct pt_regs *regs, struct user32 *dump)
dump->u_ssize = tmp >> PAGE_SHIFT;
}
- dump->regs.bx = regs->bx;
- dump->regs.cx = regs->cx;
- dump->regs.dx = regs->dx;
- dump->regs.si = regs->si;
- dump->regs.di = regs->di;
- dump->regs.bp = regs->bp;
- dump->regs.ax = regs->ax;
+ dump->regs.ebx = regs->bx;
+ dump->regs.ecx = regs->cx;
+ dump->regs.edx = regs->dx;
+ dump->regs.esi = regs->si;
+ dump->regs.edi = regs->di;
+ dump->regs.ebp = regs->bp;
+ dump->regs.eax = regs->ax;
dump->regs.ds = current->thread.ds;
dump->regs.es = current->thread.es;
savesegment(fs, fs);
dump->regs.fs = fs;
savesegment(gs, gs);
dump->regs.gs = gs;
- dump->regs.orig_ax = regs->orig_ax;
- dump->regs.ip = regs->ip;
+ dump->regs.orig_eax = regs->orig_ax;
+ dump->regs.eip = regs->ip;
dump->regs.cs = regs->cs;
- dump->regs.flags = regs->flags;
- dump->regs.sp = regs->sp;
+ dump->regs.eflags = regs->flags;
+ dump->regs.esp = regs->sp;
dump->regs.ss = regs->ss;
#if 1 /* FIXME */
@@ -108,7 +110,7 @@ static struct linux_binfmt aout_format = {
.module = THIS_MODULE,
.load_binary = load_aout_binary,
.load_shlib = load_aout_library,
-#ifdef CORE_DUMP
+#ifdef CONFIG_COREDUMP
.core_dump = aout_core_dump,
#endif
.min_coredump = PAGE_SIZE
@@ -120,12 +122,10 @@ static void set_brk(unsigned long start, unsigned long end)
end = PAGE_ALIGN(end);
if (end <= start)
return;
- down_write(&current->mm->mmap_sem);
- do_brk(start, end - start);
- up_write(&current->mm->mmap_sem);
+ vm_brk(start, end - start);
}
-#ifdef CORE_DUMP
+#ifdef CONFIG_COREDUMP
/*
* These are the only things you should do on a core-file: use only these
* macros to write out all the necessary info.
@@ -133,15 +133,7 @@ static void set_brk(unsigned long start, unsigned long end)
#include <linux/coredump.h>
-#define DUMP_WRITE(addr, nr) \
- if (!dump_write(file, (void *)(addr), (nr))) \
- goto end_coredump;
-
-#define DUMP_SEEK(offset) \
- if (!dump_seek(file, offset)) \
- goto end_coredump;
-
-#define START_DATA() (u.u_tsize << PAGE_SHIFT)
+#define START_DATA(u) (u.u_tsize << PAGE_SHIFT)
#define START_STACK(u) (u.start_stack)
/*
@@ -154,8 +146,7 @@ static void set_brk(unsigned long start, unsigned long end)
* dumping of the process results in another error..
*/
-static int aout_core_dump(long signr, struct pt_regs *regs, struct file *file,
- unsigned long limit)
+static int aout_core_dump(struct coredump_params *cprm)
{
mm_segment_t fs;
int has_dumped = 0;
@@ -165,22 +156,21 @@ static int aout_core_dump(long signr, struct pt_regs *regs, struct file *file,
fs = get_fs();
set_fs(KERNEL_DS);
has_dumped = 1;
- current->flags |= PF_DUMPCORE;
strncpy(dump.u_comm, current->comm, sizeof(current->comm));
dump.u_ar0 = offsetof(struct user32, regs);
- dump.signal = signr;
- dump_thread32(regs, &dump);
+ dump.signal = cprm->siginfo->si_signo;
+ dump_thread32(cprm->regs, &dump);
/*
* If the size of the dump file exceeds the rlimit, then see
* what would happen if we wrote the stack, but not the data
* area.
*/
- if ((dump.u_dsize + dump.u_ssize + 1) * PAGE_SIZE > limit)
+ if ((dump.u_dsize + dump.u_ssize + 1) * PAGE_SIZE > cprm->limit)
dump.u_dsize = 0;
/* Make sure we have enough room to write the stack and data areas. */
- if ((dump.u_ssize + 1) * PAGE_SIZE > limit)
+ if ((dump.u_ssize + 1) * PAGE_SIZE > cprm->limit)
dump.u_ssize = 0;
/* make sure we actually have a data and stack area to dump */
@@ -194,22 +184,26 @@ static int aout_core_dump(long signr, struct pt_regs *regs, struct file *file,
set_fs(KERNEL_DS);
/* struct user */
- DUMP_WRITE(&dump, sizeof(dump));
+ if (!dump_emit(cprm, &dump, sizeof(dump)))
+ goto end_coredump;
/* Now dump all of the user data. Include malloced stuff as well */
- DUMP_SEEK(PAGE_SIZE);
+ if (!dump_skip(cprm, PAGE_SIZE - sizeof(dump)))
+ goto end_coredump;
/* now we start writing out the user space info */
set_fs(USER_DS);
/* Dump the data area */
if (dump.u_dsize != 0) {
dump_start = START_DATA(dump);
dump_size = dump.u_dsize << PAGE_SHIFT;
- DUMP_WRITE(dump_start, dump_size);
+ if (!dump_emit(cprm, (void *)dump_start, dump_size))
+ goto end_coredump;
}
/* Now prepare to dump the stack area */
if (dump.u_ssize != 0) {
dump_start = START_STACK(dump);
dump_size = dump.u_ssize << PAGE_SHIFT;
- DUMP_WRITE(dump_start, dump_size);
+ if (!dump_emit(cprm, (void *)dump_start, dump_size))
+ goto end_coredump;
}
end_coredump:
set_fs(fs);
@@ -263,9 +257,10 @@ static u32 __user *create_aout_tables(char __user *p, struct linux_binprm *bprm)
* These are the functions used to load a.out style executables and shared
* libraries. There is no binary dependent code anywhere else.
*/
-static int load_aout_binary(struct linux_binprm *bprm, struct pt_regs *regs)
+static int load_aout_binary(struct linux_binprm *bprm)
{
unsigned long error, fd_offset, rlim;
+ struct pt_regs *regs = current_pt_regs();
struct exec ex;
int retval;
@@ -273,7 +268,7 @@ static int load_aout_binary(struct linux_binprm *bprm, struct pt_regs *regs)
if ((N_MAGIC(ex) != ZMAGIC && N_MAGIC(ex) != OMAGIC &&
N_MAGIC(ex) != QMAGIC && N_MAGIC(ex) != NMAGIC) ||
N_TRSIZE(ex) || N_DRSIZE(ex) ||
- i_size_read(bprm->file->f_path.dentry->d_inode) <
+ i_size_read(file_inode(bprm->file)) <
ex.a_text+ex.a_data+N_SYMSIZE(ex)+N_TXTOFF(ex)) {
return -ENOEXEC;
}
@@ -297,7 +292,7 @@ static int load_aout_binary(struct linux_binprm *bprm, struct pt_regs *regs)
/* OK, This is the point of no return */
set_personality(PER_LINUX);
- set_thread_flag(TIF_IA32);
+ set_personality_ia32(false);
setup_new_exec(bprm);
@@ -311,39 +306,35 @@ static int load_aout_binary(struct linux_binprm *bprm, struct pt_regs *regs)
(current->mm->start_data = N_DATADDR(ex));
current->mm->brk = ex.a_bss +
(current->mm->start_brk = N_BSSADDR(ex));
- current->mm->free_area_cache = TASK_UNMAPPED_BASE;
- current->mm->cached_hole_size = 0;
+
+ retval = setup_arg_pages(bprm, IA32_STACK_TOP, EXSTACK_DEFAULT);
+ if (retval < 0) {
+ /* Someone check-me: is this error path enough? */
+ send_sig(SIGKILL, current, 0);
+ return retval;
+ }
install_exec_creds(bprm);
- current->flags &= ~PF_FORKNOEXEC;
if (N_MAGIC(ex) == OMAGIC) {
unsigned long text_addr, map_size;
- loff_t pos;
text_addr = N_TXTADDR(ex);
-
- pos = 32;
map_size = ex.a_text+ex.a_data;
- down_write(&current->mm->mmap_sem);
- error = do_brk(text_addr & PAGE_MASK, map_size);
- up_write(&current->mm->mmap_sem);
+ error = vm_brk(text_addr & PAGE_MASK, map_size);
if (error != (text_addr & PAGE_MASK)) {
send_sig(SIGKILL, current, 0);
return error;
}
- error = bprm->file->f_op->read(bprm->file,
- (char __user *)text_addr,
- ex.a_text+ex.a_data, &pos);
+ error = read_code(bprm->file, text_addr, 32,
+ ex.a_text + ex.a_data);
if ((signed long)error < 0) {
send_sig(SIGKILL, current, 0);
return error;
}
-
- flush_icache_range(text_addr, text_addr+ex.a_text+ex.a_data);
} else {
#ifdef WARN_OLD
static unsigned long error_time, error_time2;
@@ -365,40 +356,28 @@ static int load_aout_binary(struct linux_binprm *bprm, struct pt_regs *regs)
#endif
if (!bprm->file->f_op->mmap || (fd_offset & ~PAGE_MASK) != 0) {
- loff_t pos = fd_offset;
-
- down_write(&current->mm->mmap_sem);
- do_brk(N_TXTADDR(ex), ex.a_text+ex.a_data);
- up_write(&current->mm->mmap_sem);
- bprm->file->f_op->read(bprm->file,
- (char __user *)N_TXTADDR(ex),
- ex.a_text+ex.a_data, &pos);
- flush_icache_range((unsigned long) N_TXTADDR(ex),
- (unsigned long) N_TXTADDR(ex) +
- ex.a_text+ex.a_data);
+ vm_brk(N_TXTADDR(ex), ex.a_text+ex.a_data);
+ read_code(bprm->file, N_TXTADDR(ex), fd_offset,
+ ex.a_text+ex.a_data);
goto beyond_if;
}
- down_write(&current->mm->mmap_sem);
- error = do_mmap(bprm->file, N_TXTADDR(ex), ex.a_text,
+ error = vm_mmap(bprm->file, N_TXTADDR(ex), ex.a_text,
PROT_READ | PROT_EXEC,
MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE |
MAP_EXECUTABLE | MAP_32BIT,
fd_offset);
- up_write(&current->mm->mmap_sem);
if (error != N_TXTADDR(ex)) {
send_sig(SIGKILL, current, 0);
return error;
}
- down_write(&current->mm->mmap_sem);
- error = do_mmap(bprm->file, N_DATADDR(ex), ex.a_data,
+ error = vm_mmap(bprm->file, N_DATADDR(ex), ex.a_data,
PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE |
MAP_EXECUTABLE | MAP_32BIT,
fd_offset + ex.a_text);
- up_write(&current->mm->mmap_sem);
if (error != N_DATADDR(ex)) {
send_sig(SIGKILL, current, 0);
return error;
@@ -409,13 +388,6 @@ beyond_if:
set_brk(current->mm->start_brk, current->mm->brk);
- retval = setup_arg_pages(bprm, IA32_STACK_TOP, EXSTACK_DEFAULT);
- if (retval < 0) {
- /* Someone check-me: is this error path enough? */
- send_sig(SIGKILL, current, 0);
- return retval;
- }
-
current->mm->start_stack =
(unsigned long)create_aout_tables((char __user *)bprm->p, bprm);
/* start thread */
@@ -436,12 +408,10 @@ beyond_if:
static int load_aout_library(struct file *file)
{
- struct inode *inode;
unsigned long bss, start_addr, len, error;
int retval;
struct exec ex;
- inode = file->f_path.dentry->d_inode;
retval = -ENOEXEC;
error = kernel_read(file, 0, (char *) &ex, sizeof(ex));
@@ -451,7 +421,7 @@ static int load_aout_library(struct file *file)
/* We come in here for the regular a.out style of shared libraries */
if ((N_MAGIC(ex) != ZMAGIC && N_MAGIC(ex) != QMAGIC) || N_TRSIZE(ex) ||
N_DRSIZE(ex) || ((ex.a_entry & 0xfff) && N_MAGIC(ex) == ZMAGIC) ||
- i_size_read(inode) <
+ i_size_read(file_inode(file)) <
ex.a_text+ex.a_data+N_SYMSIZE(ex)+N_TXTOFF(ex)) {
goto out;
}
@@ -465,8 +435,6 @@ static int load_aout_library(struct file *file)
start_addr = ex.a_entry & 0xfffff000;
if ((N_TXTOFF(ex) & ~PAGE_MASK) != 0) {
- loff_t pos = N_TXTOFF(ex);
-
#ifdef WARN_OLD
static unsigned long error_time;
if (time_after(jiffies, error_time + 5*HZ)) {
@@ -477,26 +445,18 @@ static int load_aout_library(struct file *file)
error_time = jiffies;
}
#endif
- down_write(&current->mm->mmap_sem);
- do_brk(start_addr, ex.a_text + ex.a_data + ex.a_bss);
- up_write(&current->mm->mmap_sem);
-
- file->f_op->read(file, (char __user *)start_addr,
- ex.a_text + ex.a_data, &pos);
- flush_icache_range((unsigned long) start_addr,
- (unsigned long) start_addr + ex.a_text +
- ex.a_data);
+ vm_brk(start_addr, ex.a_text + ex.a_data + ex.a_bss);
+ read_code(file, start_addr, N_TXTOFF(ex),
+ ex.a_text + ex.a_data);
retval = 0;
goto out;
}
/* Now use mmap to map the library into memory. */
- down_write(&current->mm->mmap_sem);
- error = do_mmap(file, start_addr, ex.a_text + ex.a_data,
+ error = vm_mmap(file, start_addr, ex.a_text + ex.a_data,
PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_32BIT,
N_TXTOFF(ex));
- up_write(&current->mm->mmap_sem);
retval = error;
if (error != start_addr)
goto out;
@@ -504,9 +464,7 @@ static int load_aout_library(struct file *file)
len = PAGE_ALIGN(ex.a_text + ex.a_data);
bss = ex.a_text + ex.a_data + ex.a_bss;
if (bss > len) {
- down_write(&current->mm->mmap_sem);
- error = do_brk(start_addr + len, bss - len);
- up_write(&current->mm->mmap_sem);
+ error = vm_brk(start_addr + len, bss - len);
retval = error;
if (error != start_addr + len)
goto out;
@@ -518,7 +476,8 @@ out:
static int __init init_aout_binfmt(void)
{
- return register_binfmt(&aout_format);
+ register_binfmt(&aout_format);
+ return 0;
}
static void __exit exit_aout_binfmt(void)
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-05 06:26:58 +0000