diff options
| -rw-r--r-- | ChangeLog | 25 | ||||
| -rw-r--r-- | Makerules | 6 | ||||
| -rw-r--r-- | elf/dlsym.c | 2 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/dl-sysdep.c | 5 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/i386/init-first.c | 85 |
5 files changed, 83 insertions, 40 deletions
@@ -1,3 +1,28 @@ +Mon Jul 10 05:39:21 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu> + + * sysdeps/mach/hurd/i386/init-first.c (init): Take just one arg, + DATA for the entry SP; DATA[-1] is always the return address + location. In both cthreads and non-cthreads cases, use asm to + force parameters into %eax and %ecx before return, and mutate + DATA[-1] to return to specific asm code to set up the user from + %eax and %ecx. + [PIC] (_init): Caller changed. + (__libc_init_first) [! PIC] (doinit): Use asm to effect call to init + with SP unwound to argument data ptr. + +Thu Jul 6 14:28:56 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu> + + * sysdeps/mach/hurd/dl-sysdep.c (fmh): Fixed this kludge to work + when 0x08000000 and up are not mapped. + + * Makerules (stamp$o-$(subdir) rule): Remove the timestamp file + before touching it. + (lib%.so): Use -Wl to get -soname to ld. + + * elf/dlsym.c: Pass final arg to _dl_lookup_symbol. + + * elf/Makefile (libdl.so): Pass $(LDFLAGS.so). + Tue Jun 20 02:18:19 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu> * Makerules (lib%.so: lib%_pic.a): Pass -soname switch giving the @@ -379,6 +379,8 @@ $(foreach o,$(object-suffixes),$(objpfx)stamp$o-$(subdir)): \ $(patsubst %,cd %;,$(objdir)) \ $(AR) cru$(verbose) ${O%-lib} \ $(patsubst $(objpfx)%,%,$^) +# `touch' won't let me touch a world-writable file I don't own. Sigh. + rm -f $@ touch $@ ifdef subdir O%-lib = $(filter ../,$(firstword $(objdir) ../))$(patsubst %,$(libtype$*),c) @@ -553,8 +555,8 @@ ifeq (yes,$(build-shared)) # $(LDLIBS-%.so) may contain -l switches to generate run-time dependencies # on other shared objects. lib%.so: lib%_pic.a - $(LINK.o) -shared -o $@ \ - -soname lib$(libprefix)$*.so$($(@F)-version) \ + $(LINK.o) -shared -o $@ -Wl,-soname \ + -Wl,lib$(libprefix)$(notdir $*).so$($(@F)-version) \ $(LDFLAGS.so) $(LDFLAGS-$(notdir $*).so) \ -L$(firstword $(objdir) .) -L$(common-objpfx:%/=%) \ $(LDLIBS-$(notdir $*).so) -Wl,--whole-archive $< \ diff --git a/elf/dlsym.c b/elf/dlsym.c index dbd617e..40ed850 100644 --- a/elf/dlsym.c +++ b/elf/dlsym.c @@ -33,7 +33,7 @@ dlsym (void *handle, const char *name) void doit (void) { const Elf32_Sym *ref = NULL; - value = _dl_lookup_symbol (name, &ref, map, map->l_name); + value = _dl_lookup_symbol (name, &ref, map, map->l_name, 1); } /* Confine the symbol scope to just this map. */ diff --git a/sysdeps/mach/hurd/dl-sysdep.c b/sysdeps/mach/hurd/dl-sysdep.c index 471c3d1..8f303bf 100644 --- a/sysdeps/mach/hurd/dl-sysdep.c +++ b/sysdeps/mach/hurd/dl-sysdep.c @@ -61,14 +61,15 @@ static void fmh() { while (!(err=__vm_region(__mach_task_self(),&a,&fmhs,&x,&x,&x,&x,&p,&x))){ __mach_port_deallocate(__mach_task_self(),p); if (a+fmhs>=0x80000000U){ - max=a;break;} + max=a; break;} fmha=a+=fmhs;} if (err) assert(err==KERN_NO_SPACE); + if (!fmha)fmhs=0;else{ fmhs=max-fmha; err = __vm_map (__mach_task_self (), &fmha, fmhs, 0, 0, MACH_PORT_NULL, 0, 1, VM_PROT_NONE, VM_PROT_NONE, VM_INHERIT_COPY); - assert_perror(err); + assert_perror(err);} } /* XXX loser kludge for vm_map kernel bug */ diff --git a/sysdeps/mach/hurd/i386/init-first.c b/sysdeps/mach/hurd/i386/init-first.c index 74b15c8..a23d201 100644 --- a/sysdeps/mach/hurd/i386/init-first.c +++ b/sysdeps/mach/hurd/i386/init-first.c @@ -96,7 +96,7 @@ init1 (int argc, char *arg0, ...) } static void -init (int *data, void *usercode, void **retaddrloc) +init (int *data) { int argc = *data; char **argv = (void *) (data + 1); @@ -144,42 +144,43 @@ init (int *data, void *usercode, void **retaddrloc) /* Push the user code address on the top of the new stack. It will be the return address for `init1'; we will jump there with NEWSP as the stack pointer. */ - *--(void **) newsp = usercode; - /* Mutate our own return address to run the code below. */ - *retaddrloc = &&switch_stacks; + *--(int *) newsp = data[-1]; + ((void **) data)[-1] = &&switch_stacks; /* Force NEWSP into %ecx and &init1 into %eax, which are not restored - by function return. */ - asm volatile ("# a %0 c %1" : : "a" (&init1), "c" (newsp)); - return; - switch_stacks: - /* Our return address was redirected to here, so at this point our - stack is unwound and callers' registers restored. Only %ecx and - %eax are call-clobbered and thus still have the values we set just - above. Fetch from there the new stack pointer we will run on, and - jmp to the run-time address of `init1'; when it returns, it will - run the user code with the argument data at the top of the stack. */ - asm volatile ("movl %ecx, %esp; jmp *%eax"); - /* NOTREACHED */ - } + by function return. */ + asm volatile ("# a %0 c %1" : : "a" (newsp), "c" (&init1)); + } else { - /* We are not switching stacks, but we must play some games with - the one we've got, similar to the stack-switching code above. */ - *retaddrloc = &&call_init1; - /* Force the user code address into %ecx and the run-time address of - `init1' into %eax, for use below. */ - asm volatile ("# a %0 c %1" : : "a" (&init1), "c" (usercode)); - return; - call_init1: - /* As in the stack-switching case, at this point our stack is unwound - and callers' registers restored, and only %ecx and %eax - communicate values from the lines above. In this case we have - stashed in %ecx the user code return address. Push it on the top - of the stack so it acts as init1's return address, and then jump - there. */ - asm volatile ("pushl %ecx; jmp *%eax"); - /* NOTREACHED */ + /* The argument data is just above the stack frame we will unwind by + returning. Mutate our own return address to run the code below. */ + int usercode = data[-1]; + ((void **) data)[-1] = &&call_init1; + /* Force USERCODE into %eax and &init1 into %ecx, which are not + restored by function return. */ + asm volatile ("# a %0 c %1" : : "a" (usercode), "c" (&init1)); } + + return; + + switch_stacks: + /* Our return address was redirected to here, so at this point our stack + is unwound and callers' registers restored. Only %ecx and %eax are + call-clobbered and thus still have the values we set just above. + Fetch from there the new stack pointer we will run on, and jmp to the + run-time address of `init1'; when it returns, it will run the user + code with the argument data at the top of the stack. */ + asm volatile ("movl %eax, %esp; jmp *%ecx"); + /* NOTREACHED */ + + call_init1: + /* As in the stack-switching case, at this point our stack is unwound and + callers' registers restored, and only %ecx and %eax communicate values + from the lines above. In this case we have stashed in %eax the user + code return address. Push it on the top of the stack so it acts as + init1's return address, and then jump there. */ + asm volatile ("pushl %eax; jmp *%ecx"); + /* NOTREACHED */ } @@ -202,7 +203,7 @@ _init (int argc, ...) RUN_HOOK (_hurd_preinit_hook, ()); - init (&argc, ((void **) &argc)[-1], &((void **) &argc)[-1]); + init (&argc); } #endif @@ -213,7 +214,21 @@ __libc_init_first (int argc __attribute__ ((unused)), ...) #ifndef PIC void doinit (int *data) { - init (data, ((void **) &argc)[-1], &((void **) &data)[-1]); + /* This function gets called with the argument data at TOS. */ + void doinit1 (int argc, ...) + { + init (&argc); + } + + /* Push the user return address after the argument data, and then + jump to `doinit1' (above), so it is as if __libc_init_first's + caller had called `doinit1' with the argument data already on the + stack. */ + *--data = (&argc)[-1]; + asm volatile ("movl %0, %%esp\n" /* Switch to new outermost stack. */ + "movl $0, %%ebp\n" /* Clear outermost frame pointer. */ + "jmp *%1" : : "r" (data), "r" (&doinit1)); + /* NOTREACHED */ } /* Initialize data structures so we can do RPCs. */ |