diff options
Diffstat (limited to 'sysdeps/arm')
| -rw-r--r-- | sysdeps/arm/__longjmp.S | 7 | ||||
| -rw-r--r-- | sysdeps/arm/bits/fenv.h | 90 | ||||
| -rw-r--r-- | sysdeps/arm/bsd-_setjmp.S | 4 | ||||
| -rw-r--r-- | sysdeps/arm/bsd-setjmp.S | 4 | ||||
| -rw-r--r-- | sysdeps/arm/dl-machine.h | 478 | ||||
| -rw-r--r-- | sysdeps/arm/elf/setjmp.S | 76 | ||||
| -rw-r--r-- | sysdeps/arm/elf/start.S | 109 | ||||
| -rw-r--r-- | sysdeps/arm/fpu/__longjmp.S | 36 | ||||
| -rw-r--r-- | sysdeps/arm/fpu/setjmp.S | 35 | ||||
| -rw-r--r-- | sysdeps/arm/init-first.c | 71 | ||||
| -rw-r--r-- | sysdeps/arm/memset.S | 68 | ||||
| -rw-r--r-- | sysdeps/arm/setjmp.S | 9 | ||||
| -rw-r--r-- | sysdeps/arm/sysdep.h | 13 |
13 files changed, 978 insertions, 22 deletions
diff --git a/sysdeps/arm/__longjmp.S b/sysdeps/arm/__longjmp.S index a2042f5543..239b0cfc85 100644 --- a/sysdeps/arm/__longjmp.S +++ b/sysdeps/arm/__longjmp.S @@ -1,5 +1,5 @@ /* longjmp for ARM. - Copyright (C) 1997 Free Software Foundation, Inc. + Copyright (C) 1997, 1998 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -29,10 +29,5 @@ ENTRY (__longjmp) movs r0, r1 /* get the return value in place */ moveq r1, #1 /* can't let setjmp() return zero! */ -#if __ARM_USES_FP - add r2, r2, #48 - lfmfd f4, 4, [r2] -#endif - LOADREGS(ia, r2, {v1-v6, sl, fp, sp, pc}) END (__longjmp) diff --git a/sysdeps/arm/bits/fenv.h b/sysdeps/arm/bits/fenv.h new file mode 100644 index 0000000000..3e4cdd3f3b --- /dev/null +++ b/sysdeps/arm/bits/fenv.h @@ -0,0 +1,90 @@ +/* Copyright (C) 1997, 1998 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#ifndef _FENV_H +# error "Never use <bits/fenv.h> directly; include <fenv.h> instead." +#endif + + +/* Define bits representing the exception. We use the bit positions + of the appropriate bits in the FPU control word. */ +enum + { + FE_INVALID = 0x01, +#define FE_INVALID FE_INVALID + __FE_DENORM = 0x02, + FE_DIVBYZERO = 0x04, +#define FE_DIVBYZERO FE_DIVBYZERO + FE_OVERFLOW = 0x08, +#define FE_OVERFLOW FE_OVERFLOW + FE_UNDERFLOW = 0x10, +#define FE_UNDERFLOW FE_UNDERFLOW + FE_INEXACT = 0x20 +#define FE_INEXACT FE_INEXACT + }; + +#define FE_ALL_EXCEPT \ + (FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID) + +/* The ARM FPU supports all of the four defined rounding modes. We + use again the bit positions in the FPU control word as the values + for the appropriate macros. */ +enum + { + FE_TONEAREST = 0, +#define FE_TONEAREST FE_TONEAREST + FE_DOWNWARD = 0x400, +#define FE_DOWNWARD FE_DOWNWARD + FE_UPWARD = 0x800, +#define FE_UPWARD FE_UPWARD + FE_TOWARDSZERO = 0xc00 +#define FE_TOWARDSZERO FE_TOWARDSZERO + }; + + +/* Type representing exception flags. */ +typedef unsigned short int fexcept_t; + + +/* Type representing floating-point environment. This function corresponds + to the layout of the block written by the `fstenv'. */ +typedef struct + { + unsigned short int control_word; + unsigned short int __unused1; + unsigned short int status_word; + unsigned short int __unused2; + unsigned short int tags; + unsigned short int __unused3; + unsigned int eip; + unsigned short int cs_selector; + unsigned int opcode:11; + unsigned int __unused4:5; + unsigned int data_offset; + unsigned short int data_selector; + unsigned short int __unused5; + } +fenv_t; + +/* If the default argument is used we use this value. */ +#define FE_DFL_ENV ((fenv_t *) -1) + +#ifdef __USE_GNU +/* Floating-point environment where none of the exception is masked. */ +# define FE_NOMASK_ENV ((fenv_t *) -2) +#endif diff --git a/sysdeps/arm/bsd-_setjmp.S b/sysdeps/arm/bsd-_setjmp.S index 5643c50918..6ae6da6457 100644 --- a/sysdeps/arm/bsd-_setjmp.S +++ b/sysdeps/arm/bsd-_setjmp.S @@ -1,5 +1,5 @@ /* BSD `_setjmp' entry point to `sigsetjmp (..., 0)'. ARM version. - Copyright (C) 1997 Free Software Foundation, Inc. + Copyright (C) 1997, 1998 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -25,5 +25,5 @@ ENTRY (_setjmp) mov r1, #0 - b __sigsetjmp + b C_SYMBOL_NAME(__sigsetjmp) END (_setjmp) diff --git a/sysdeps/arm/bsd-setjmp.S b/sysdeps/arm/bsd-setjmp.S index ac7dd96821..52622e2155 100644 --- a/sysdeps/arm/bsd-setjmp.S +++ b/sysdeps/arm/bsd-setjmp.S @@ -1,5 +1,5 @@ /* BSD `setjmp' entry point to `sigsetjmp (..., 1)'. ARM version. - Copyright (C) 1997 Free Software Foundation, Inc. + Copyright (C) 1997, 1998 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -25,5 +25,5 @@ ENTRY (setjmp) mov r1, #1 - b __sigsetjmp + b C_SYMBOL_NAME(__sigsetjmp) END (setjmp) diff --git a/sysdeps/arm/dl-machine.h b/sysdeps/arm/dl-machine.h new file mode 100644 index 0000000000..66b69d02db --- /dev/null +++ b/sysdeps/arm/dl-machine.h @@ -0,0 +1,478 @@ +/* Machine-dependent ELF dynamic relocation inline functions. ARM version. + Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#ifndef dl_machine_h +#define dl_machine_h + +#define ELF_MACHINE_NAME "ARM" + +#include <sys/param.h> + +#include <assert.h> + +/* Return nonzero iff E_MACHINE is compatible with the running host. */ +static inline int __attribute__ ((unused)) +elf_machine_matches_host (Elf32_Half e_machine) +{ + switch (e_machine) + { + case EM_ARM: + return 1; + default: + return 0; + } +} + + +/* Return the link-time address of _DYNAMIC. Conveniently, this is the + first element of the GOT. This must be inlined in a function which + uses global data. */ +static inline Elf32_Addr __attribute__ ((unused)) +elf_machine_dynamic (void) +{ + register Elf32_Addr *got asm ("r10"); + return *got; +} + + +/* Return the run-time load address of the shared object. */ +// patb +static inline Elf32_Addr __attribute__ ((unused)) +elf_machine_load_address (void) +{ + Elf32_Addr addr; + asm (" ldr ip,.L1 + ldr r3,.L3 + add r3, r3, sl + ldr ip,[sl, ip] + sub ip, r3, ip + b .L2 + .L1: .word _dl_start(GOT) + .L3: .word _dl_start(GOTOFF) + .L2: mov %0, ip" + : "=r" (addr) : : "ip", "r3"); + return addr; +} + + +/* Set up the loaded object described by L so its unrelocated PLT + entries will jump to the on-demand fixup code in dl-runtime.c. */ + +static inline int __attribute__ ((unused)) +elf_machine_runtime_setup (struct link_map *l, int lazy, int profile) +{ + Elf32_Addr *got; + extern void _dl_runtime_resolve (Elf32_Word); + extern void _dl_runtime_profile (Elf32_Word); + + if (l->l_info[DT_JMPREL] && lazy) + { + /* patb: this is different than i386 */ + /* The GOT entries for functions in the PLT have not yet been filled + in. Their initial contents will arrange when called to push an + index into the .got section, load ip with &_GLOBAL_OFFSET_TABLE_[3], + and then jump to _GLOBAL_OFFSET_TABLE[2]. */ + got = (Elf32_Addr *) (l->l_addr + l->l_info[DT_PLTGOT]->d_un.d_ptr); + got[1] = (Elf32_Addr) l; /* Identify this shared object. */ + + /* The got[2] entry contains the address of a function which gets + called to get the address of a so far unresolved function and + jump to it. The profiling extension of the dynamic linker allows + to intercept the calls to collect information. In this case we + don't store the address in the GOT so that all future calls also + end in this function. */ + if (profile) + { + got[2] = (Elf32_Addr) &_dl_runtime_profile; + /* Say that we really want profiling and the timers are started. */ + _dl_profile_map = l; + } + else + /* This function will get called to fix up the GOT entry indicated by + the offset on the stack, and then jump to the resolved address. */ + got[2] = (Elf32_Addr) &_dl_runtime_resolve; + } + return lazy; +} + +/* This code is used in dl-runtime.c to call the `fixup' function + and then redirect to the address it returns. */ + // macro for handling PIC situation.... +#ifdef PIC +#define CALL_ROUTINE(x) " ldr sl,0f + add sl, pc, sl +1: ldr r2, 2f + mov lr, pc + add pc, sl, r2 + b 3f +0: .word _GLOBAL_OFFSET_TABLE_ - 1b - 4 +2: .word " #x "(GOTOFF) +3: " +#else +#define CALL_ROUTINE(x) " bl " #x +#endif + +#ifndef PROF +# define ELF_MACHINE_RUNTIME_TRAMPOLINE asm ("\ + .text + .globl _dl_runtime_resolve + .type _dl_runtime_resolve, #function + .align 2 +_dl_runtime_resolve: + @ we get called with + @ stack[0] contains the return address from this call + @ ip contains &GOT[n+3] (pointer to function) + @ lr points to &GOT[2] + + @ save almost everything; lr is already on the stack + stmdb sp!,{r0-r3,sl,fp} + + @ prepare to call fixup() + + @ change &GOT[n+3] into 8*n NOTE: reloc are 8 bytes each + sub r1, ip, lr + sub r1, r1, #4 + add r1, r1, r1 + + @ get pointer to linker struct + ldr r0, [lr, #-4] + + " CALL_ROUTINE(fixup) " + + @ save the return + mov ip, r0 + + @ restore the stack + ldmia sp!,{r0-r3,sl,fp,lr} + + @ jump to the newly found address + mov pc, ip + + .size _dl_runtime_resolve, .-_dl_runtime_resolve + + .globl _dl_runtime_profile + .type _dl_runtime_profile, #function + .align 2 +_dl_runtime_profile: + @ we get caled with + @ stack[0] contains the return address from this call + @ ip contains &GOT[n+3] (pointer to function) + @ lr points to &GOT[2] + + @ save almost everything; return add is already on the stack + stmdb sp!,{r0-r3,fp} + + @ prepare to call fixup() + + @ change &GOT[n+3] into 8*n NOTE: reloc are 8 bytes each + sub r1, ip, lr + sub r1, r1, #4 + add r1, r1, r1 + + @ get pointer to linker struct + ldr r0, [lr, #-4] + + " CALL_ROUTINE(profile_fixup) " + + @ save the return + mov ip, r0 + + @ restore the stack + ldmia sp!,{r0-r3,fp,lr} + + @ jump to the newly found address + mov pc, ip + + .size _dl_runtime_profile, .-_dl_runtime_profile + .previous +"); +#else // PROF +# define ELF_MACHINE_RUNTIME_TRAMPOLINE asm ("\ + .text + .globl _dl_runtime_resolve + .globl _dl_runtime_profile + .type _dl_runtime_resolve, #function + .type _dl_runtime_profile, #function + .align 2 +_dl_runtime_resolve: +_dl_runtime_profile: + stmdb sp!,{r0-r3,fp} + ldr r1,[sp,#0x34] + sub r1, ip, lr + sub r1, r1, #4 + add r1, r1, r1 + ldr r0, [lr, #-4] + " CALL_ROUTINE(fixup) " + mov ip, r0 + ldmia sp!,{r0-r3,fp,lr} + mov pc, ip + + .size _dl_runtime_profile, .-_dl_runtime_profile + .previous +"); +#endif //PROF + +/* Mask identifying addresses reserved for the user program, + where the dynamic linker should not map anything. */ +#define ELF_MACHINE_USER_ADDRESS_MASK 0xf8000000UL + +/* Initial entry point code for the dynamic linker. + The C function `_dl_start' is the real entry point; + its return value is the user program's entry point. */ + +#define RTLD_START asm ("\ +.text +.globl _start +.globl _dl_start_user +_start: + @ at start time, all the args are on the stack + mov r0, sp + bl _dl_start + @ returns user entry point in r0 +_dl_start_user: + mov r6, r0 + @ we are PIC code, so get global offset table + ldr sl, .L_GET_GOT + add sl, pc, sl +.L_GOT_GOT: + @ See if we were run as a command with the executable file + @ name as an extra leading argument. + ldr r1, .L_SKIP_ARGS + ldr r1, [sl, r1] + @ get the original arg count + ldr r0, [sp] + @ subtract _dl_skip_args from it + sub r0, r0, r1 + @ adjust the stack pointer to skip them + add sp, sp, r1, lsl #2 + @ store the new argc in the new stack location + str r0, [sp] + + @ now we enter a _dl_init_next loop + ldr r2, .L_DEF_SCOPE + ldr r2, [sl, r2] + ldr r4, [r2, #8] + @ call _dl_init_next to get the address of an initalizer +0: mov r0, r4 + bl _dl_init_next(PLT) + cmp r0, #0 + beq 1f + @ call the shared-object initializer + @ during this call, the stack may get moved around + mov lr, pc + mov pc, r0 + @ go back and look for another initializer + b 0b +1: @ clear the startup flag + ldr r2, .L_STARTUP_FLAG + ldr r1, [sl, r2] + @ we know r0==0 at this point + str r0, [r1] + @ load the finalizer function + ldr r0, .L_FINI_PROC + ldr r0, [sl, r0] + @ jump to the user_s entry point + mov pc, r6 +.L_GET_GOT: + .word _GLOBAL_OFFSET_TABLE_ - .L_GOT_GOT - 4 \n\ +.L_SKIP_ARGS: \n\ + .word _dl_skip_args(GOTOFF) \n\ +.L_DEF_SCOPE: \n\ + .word _dl_default_scope(GOT) \n\ +.L_STARTUP_FLAG: + .word _dl_starting_up(GOT) +.L_FINI_PROC: + .word _dl_fini(GOT) +.previous\n\ +"); + +/* Nonzero iff TYPE should not be allowed to resolve to one of + the main executable's symbols, as for a COPY reloc. */ +#define elf_machine_lookup_noexec_p(type) ((type) == R_ARM_COPY) + +/* Nonzero iff TYPE describes relocation of a PLT entry, so + PLT entries should not be allowed to define the value. */ +#define elf_machine_lookup_noplt_p(type) ((type) == R_ARM_JMP_SLOT) + +/* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */ +#define ELF_MACHINE_JMP_SLOT R_ARM_JMP_SLOT + +/* The i386 never uses Elf32_Rela relocations. */ +#define ELF_MACHINE_NO_RELA 1 + +/* We define an initialization functions. This is called very early in + _dl_sysdep_start. */ +#define DL_PLATFORM_INIT dl_platform_init () + +extern const char *_dl_platform; + +static inline void __attribute__ ((unused)) +dl_platform_init (void) +{ + if (_dl_platform == NULL) + /* We default to ARM + This is where processors could be distinguished arm2, arm6, sa110, etc */ + _dl_platform = "ARM"; +} + +static inline void +elf_machine_fixup_plt (struct link_map *map, const Elf32_Rel *reloc, + Elf32_Addr *reloc_addr, Elf32_Addr value) +{ + *reloc_addr = value; +} + +/* Return the final value of a plt relocation. */ +static inline Elf32_Addr +elf_machine_plt_value (struct link_map *map, const Elf32_Rel *reloc, + Elf32_Addr value) +{ + return value; +} + +#endif /* !dl_machine_h */ + +#ifdef RESOLVE + +extern char **_dl_argv; + +/* Perform the relocation specified by RELOC and SYM (which is fully resolved). + MAP is the object containing the reloc. */ + +static inline void +elf_machine_rel (struct link_map *map, const Elf32_Rel *reloc, + const Elf32_Sym *sym, const struct r_found_version *version, + Elf32_Addr *const reloc_addr) +{ + if (ELF32_R_TYPE (reloc->r_info) == R_ARM_RELATIVE) + { +#ifndef RTLD_BOOTSTRAP + if (map != &_dl_rtld_map) /* Already done in rtld itself. */ +#endif + *reloc_addr += map->l_addr; + } + else if (ELF32_R_TYPE (reloc->r_info) != R_ARM_NONE) + { + const Elf32_Sym *const refsym = sym; + Elf32_Addr value = RESOLVE (&sym, version, ELF32_R_TYPE (reloc->r_info)); + if (sym) + value += sym->st_value; + + switch (ELF32_R_TYPE (reloc->r_info)) + { + case R_ARM_COPY: + if (sym == NULL) + /* This can happen in trace mode if an object could not be + found. */ + break; + if (sym->st_size > refsym->st_size + || (_dl_verbose && sym->st_size < refsym->st_size)) + { + const char *strtab; + + strtab = ((const char *) map->l_addr + + map->l_info[DT_STRTAB]->d_un.d_ptr); + _dl_sysdep_error (_dl_argv[0] ?: "<program name unknown>", + ": Symbol `", strtab + refsym->st_name, + "' has different size in shared object, " + "consider re-linking\n", NULL); + } + memcpy (reloc_addr, (void *) value, MIN (sym->st_size, + refsym->st_size)); + break; + case R_ARM_GLOB_DAT: + case R_ARM_JMP_SLOT: + +#if 0 +#define _HEX(i) for (j=28; j>=0; j-=4) b[7-j/4]="0123456789abcdef"[((int)i>>j)&15]; +{ +char b[10]; +int j; +_HEX(map->l_addr); +__asm__ (" mov r0, #2; mov r1, %0; mov r2, #9; swi 0x00900004; " + : : "r"(b) : "r0", "r1", "r2" ); +_HEX(sym->st_size); +__asm__ (" mov r0, #2; mov r1, %0; mov r2, #9; swi 0x00900004; " + : : "r"(b) : "r0", "r1", "r2" ); +_HEX(&sym->st_value); +__asm__ (" mov r0, #2; mov r1, %0; mov r2, #9; swi 0x00900004; " + : : "r"(b) : "r0", "r1", "r2" ); +_HEX(sym->st_value); +__asm__ (" mov r0, #2; mov r1, %0; mov r2, #9; swi 0x00900004; " + : : "r"(b) : "r0", "r1", "r2" ); +_HEX(sym); +__asm__ (" mov r0, #2; mov r1, %0; mov r2, #9; swi 0x00900004; " + : : "r"(b) : "r0", "r1", "r2" ); +_HEX(reloc_addr); +__asm__ (" mov r0, #2; mov r1, %0; mov r2, #9; swi 0x00900004; " + : : "r"(b) : "r0", "r1", "r2" ); +b[0]=' '; b[1]='\n'; +__asm__ (" mov r0, #2; mov r1, %0; mov r2, #2; swi 0x00900004; " + : : "r"(b) : "r0", "r1", "r2" ); +} +#endif + *reloc_addr = value; + break; + case R_ARM_32: + { +#ifndef RTLD_BOOTSTRAP + /* This is defined in rtld.c, but nowhere in the static + libc.a; make the reference weak so static programs can + still link. This declaration cannot be done when + compiling rtld.c (i.e. #ifdef RTLD_BOOTSTRAP) because + rtld.c contains the common defn for _dl_rtld_map, which + is incompatible with a weak decl in the same file. */ + weak_extern (_dl_rtld_map); + if (map == &_dl_rtld_map) + /* Undo the relocation done here during bootstrapping. + Now we will relocate it anew, possibly using a + binding found in the user program or a loaded library + rather than the dynamic linker's built-in definitions + used while loading those libraries. */ + value -= map->l_addr + refsym->st_value; +#endif + *reloc_addr += value; + break; + } + case R_ARM_PC26: + *reloc_addr += (value - (Elf32_Addr) reloc_addr); + break; + default: + assert (! "unexpected dynamic reloc type"); + break; + } + } +} + +static inline void +elf_machine_lazy_rel (struct link_map *map, const Elf32_Rel *reloc) +{ + Elf32_Addr *const reloc_addr = (void *) (map->l_addr + reloc->r_offset); + switch (ELF32_R_TYPE (reloc->r_info)) + { + case R_ARM_JMP_SLOT: + *reloc_addr += map->l_addr; + break; + default: + assert (! "unexpected PLT reloc type"); + break; + } +} + +#endif /* RESOLVE */ diff --git a/sysdeps/arm/elf/setjmp.S b/sysdeps/arm/elf/setjmp.S new file mode 100644 index 0000000000..51572ca515 --- /dev/null +++ b/sysdeps/arm/elf/setjmp.S @@ -0,0 +1,76 @@ +/* setjmp for arm, ELF version. + Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <sysdep.h> +#define _ASM +#define _SETJMP_H +#include <bits/setjmp.h> + + /* We include the BSD entry points here as well but we make + them weak. */ +ENTRY (setjmp) + .weak C_SYMBOL_NAME (setjmp) + @ call comes here with + @ lr = return pc + @ r0 = &jump_buf + + @ add a second argument into the fray + mov r1, #1 + @ call the common code + b __sigsetjmp(PLT) +END (setjmp) + + /* Binary compatibility entry point. */ +ENTRY (_setjmp) + .weak C_SYMBOL_NAME (_setjmp) +ENTRY (__setjmp) + @ call comes here with + @ lr = return pc + @ r0 = &jump_buf + + @ add a second argument into the fray + mov r1, #1 + @ fall through to the common code.... + +ENTRY (__sigsetjmp) + @ save the registers into the jmp_buf.... + stmia r0, {r1-r6, sl, fp, sp, lr} + + /* Make a tail call to __sigjmp_save; it takes the same args. */ +#ifdef PIC + /* We cannot use the PLT, because it requires that sl==r10 be set, but + we can't save and restore our caller's value. Instead, we do an + indirect jump through the GOT, using for the temporary register + ip, which is call-clobbered. */ + ldr ip, 1f + add ip, ip, pc +2: @ get the address of __sigjmp_save + ldr r1, 3f + ldr ip, [ip, r1] + @ restore r1 + ldr r1, [r0] + @ jump to *__sigjmp_save + mov pc, ip +1: .word _GLOBAL_OFFSET_TABLE_ - 2b - 4 +3: .word __sigjmp_save(GOT) + +#else + b __sigjmp_save +#endif +END (__sigsetjmp) diff --git a/sysdeps/arm/elf/start.S b/sysdeps/arm/elf/start.S new file mode 100644 index 0000000000..e0964a1e38 --- /dev/null +++ b/sysdeps/arm/elf/start.S @@ -0,0 +1,109 @@ +/* Startup code for ARM & ELF + Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +/* This is the canonical entry point, usually the first thing in the text + segment. + + Note that the code in the .init section has already been run. + This includes _init and _libc_init + + + At this entry point, most registers' values are unspecified, except for: + + r0 Contains a function pointer to be registered with `atexit'. + This is how the dynamic linker arranges to have DT_FINI + functions called for shared libraries that have been loaded + before this code runs. + + sp The stack contains the arguments and environment: + 0(%esp) argc + 4(%esp) argv[0] + ... + (4*argc)(%esp) NULL + (4*(argc+1))(%esp) envp[0] + ... + NULL +*/ + + .text + .globl _start +_start: + /* Clear the frame pointer. The Intel ABI suggests this be done, + to mark the outermost frame obviously. This seems like a + sensible thing to do */ + mov fp, #0 + + /* r0 contains the address of the shared library termination + function, which we will register with `atexit' to be called by + `exit'. I suspect that on some systems, and when statically + linked, this will not be set by anything to any function + pointer; hopefully it will be zero so we don't try to call + random pointers. */ + cmp r0,#0 + blne atexit(PLT) + + /* Do essential libc initialization. In statically linked + programs under the GNU Hurd, this is what sets up the + arguments on the stack for the code below. For dyn-link + programs, this has been run already, in the .init code. */ +#ifndef PIC + bl __libc_init_first + + /* Extract the arguments and environment as encoded on the stack + and set up the arguments for `main': argc, argv, envp. */ + ldr r0,[sp] + add r1,sp,#4 + add r2,r1,r0,lsl #2 + add r2,r2,#4 + /* save a copy of envp while we have it */ + ldr r3,L_environ + str r2,[r3] + + /* Call `_init', which is the entry point to our own `.init' + section; and register with `atexit' to have `exit' call + `_fini', which is the entry point to our own `.fini' section. */ + bl _init + ldr r0,L_fini + bl atexit + b L_pfini + +L_fini: .word _fini +L_environ: .word _environ +L_pfini: +#endif + /* rebuild the arg list for main() */ + ldr r0,[sp] + add r1,sp,#4 + add r2,r1,r0,lsl #2 + add r2,r2,#4 + + /* Call the user's main function, and exit with its value. */ + bl main + bl exit + /* should never get here....*/ + bl abort + + +/* Define a symbol for the first piece of initialized data. */ + .data + .globl __data_start +__data_start: + .long 0 + .weak data_start + data_start = __data_start diff --git a/sysdeps/arm/fpu/__longjmp.S b/sysdeps/arm/fpu/__longjmp.S new file mode 100644 index 0000000000..8afa177b20 --- /dev/null +++ b/sysdeps/arm/fpu/__longjmp.S @@ -0,0 +1,36 @@ +/* longjmp for ARM. + Copyright (C) 1997, 1998 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <sysdep.h> +#define _SETJMP_H +#define _ASM +#include <bits/setjmp.h> + +/* __longjmp(jmpbuf, val) */ + +ENTRY (__longjmp) + movs r2, r0 + movs r0, r1 /* get the return value in place */ + moveq r1, #1 /* can't let setjmp() return zero! */ + + add r2, r2, #48 + lfmfd f4, 4, [r2] + + LOADREGS(ia, r2, {v1-v6, sl, fp, sp, pc}) +END (__longjmp) diff --git a/sysdeps/arm/fpu/setjmp.S b/sysdeps/arm/fpu/setjmp.S new file mode 100644 index 0000000000..790e7566d4 --- /dev/null +++ b/sysdeps/arm/fpu/setjmp.S @@ -0,0 +1,35 @@ +/* setjmp for ARM. + Copyright (C) 1997, 1998 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <sysdep.h> +#define _SETJMP_H +#define _ASM +#include <bits/setjmp.h> + + /* Binary compatibility entry point. */ +ENTRY (__setjmp) + mov r1, #0 +ENTRY (__sigsetjmp) + /* Save registers */ + sfmea f4, 4, [r0]! + stmia r0, {v1-v6, sl, fp, sp, lr} + + /* Make a tail call to __sigjmp_save; it takes the same args. */ + B PLTJMP(C_SYMBOL_NAME(__sigjmp_save)) +END (__setjmp) diff --git a/sysdeps/arm/init-first.c b/sysdeps/arm/init-first.c new file mode 100644 index 0000000000..7e6bcf79ff --- /dev/null +++ b/sysdeps/arm/init-first.c @@ -0,0 +1,71 @@ +/* Initialization code run first thing by the ELF startup code. For ARM. + Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <unistd.h> + +extern void __libc_init (int, char **, char **); +extern void __getopt_clean_environment (char **); +extern void __libc_global_ctors (void); + +int __libc_multiple_libcs = 1; + +pid_t __libc_pid; + +static void +init (int *data) +{ + int argc = *data; + char **argv = (void *) (data + 1); + char **envp = &argv[argc + 1]; + + __environ = envp; + __libc_init (argc, argv, envp); + + /* This is a hack to make the special getopt in GNU libc working. */ + __getopt_clean_environment (envp); +} + +#ifdef PIC +/* This function is called to initialize the shared C library. + It is called just before the user _start code from i386/elf/start.S, + with the stack set up as that code gets it. */ + +/* NOTE! The linker notices the magical name `_init' and sets the DT_INIT + pointer in the dynamic section based solely on that. It is convention + for this function to be in the `.init' section, but the symbol name is + the only thing that really matters!! */ +/*void _init (int argc, ...) __attribute__ ((unused, section (".init")));*/ + +void +_init (int argc, ...) +{ + init (&argc); + + __libc_global_ctors (); +} +#endif + + +void +__libc_init_first (int argc __attribute__ ((unused)), ...) +{ +#ifndef PIC + init (&argc); +#endif +} diff --git a/sysdeps/arm/memset.S b/sysdeps/arm/memset.S new file mode 100644 index 0000000000..a986d687da --- /dev/null +++ b/sysdeps/arm/memset.S @@ -0,0 +1,68 @@ +/* Copyright (C) 1998 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Philip Blundell <philb@gnu.org> + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <sysdep.h> + +/* void *memset (dstpp, c, len) */ + +ENTRY(memset) + mov a4, a1 + cmp a3, $8 @ at least 8 bytes to do? + blt 2f + orr a2, a2, a2, lsl $8 + orr a2, a2, a2, lsl $16 +1: + tst a4, $3 @ aligned yet? + strneb a2, [a4], $1 + subne a3, a3, $1 + bne 1b + mov ip, a2 +1: + cmp a3, $8 @ 8 bytes still to do? + blt 2f + stmia a4!, {a2, ip} + sub a3, a3, $8 + cmp a3, $8 @ 8 bytes still to do? + blt 2f + stmia a4!, {a2, ip} + sub a3, a3, $8 + cmp a3, $8 @ 8 bytes still to do? + blt 2f + stmia a4!, {a2, ip} + sub a3, a3, $8 + cmp a3, $8 @ 8 bytes still to do? + stmgeia a4!, {a2, ip} + subge a3, a3, $8 + bge 1b +2: + movs a3, a3 @ anything left? + RETINSTR(moveq,pc,lr) @ nope + rsb a3, a3, $7 + add pc, pc, a3, lsl $2 + mov r0, r0 + strb a2, [a4], $1 + strb a2, [a4], $1 + strb a2, [a4], $1 + strb a2, [a4], $1 + strb a2, [a4], $1 + strb a2, [a4], $1 + strb a2, [a4], $1 + strb a2, [a4], $1 + RETINSTR(mov,pc,lr) +END(memset) diff --git a/sysdeps/arm/setjmp.S b/sysdeps/arm/setjmp.S index 08cd0d254e..237cc0addd 100644 --- a/sysdeps/arm/setjmp.S +++ b/sysdeps/arm/setjmp.S @@ -1,5 +1,5 @@ /* setjmp for ARM. - Copyright (C) 1997 Free Software Foundation, Inc. + Copyright (C) 1997, 1998 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -27,11 +27,8 @@ ENTRY (__setjmp) mov r1, #0 ENTRY (__sigsetjmp) /* Save registers */ -#if __ARM_USES_FP - sfmea f4, 4, [r0]! -#endif stmia r0, {v1-v6, sl, fp, sp, lr} /* Make a tail call to __sigjmp_save; it takes the same args. */ - B __sigjmp_save -END (__sigsetjmp) + B PLTJMP(C_SYMBOL_NAME(__sigjmp_save)) +END (__setjmp) diff --git a/sysdeps/arm/sysdep.h b/sysdeps/arm/sysdep.h index 8d1e2972df..28dd402ced 100644 --- a/sysdeps/arm/sysdep.h +++ b/sysdeps/arm/sysdep.h @@ -1,5 +1,5 @@ /* Assembler macros for ARM. - Copyright (C) 1997 Free Software Foundation, Inc. + Copyright (C) 1997, 1998 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -28,19 +28,23 @@ /* ELF uses byte-counts for .align, most others use log2 of count of bytes. */ #define ALIGNARG(log2) 1<<log2 /* For ELF we need the `.type' directive to make shared libs work right. */ -#define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg; +#define ASM_TYPE_DIRECTIVE(name,typearg) .type name,%##typearg; #define ASM_SIZE_DIRECTIVE(name) .size name,.-name /* In ELF C symbols are asm symbols. */ #undef NO_UNDERSCORES #define NO_UNDERSCORES +#define PLTJMP(_x) _x##(PLT) + #else #define ALIGNARG(log2) log2 #define ASM_TYPE_DIRECTIVE(name,type) /* Nothing is specified. */ #define ASM_SIZE_DIRECTIVE(name) /* Nothing is specified. */ +#define PLTJMP(_x) _x + #endif /* APCS-32 doesn't preserve the condition codes across function call. */ @@ -56,13 +60,10 @@ instr##s regs #endif -/* Don't do floating point */ -#define __ARM_USES_FP 1 - /* Define an entry point visible from C. */ #define ENTRY(name) \ ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name); \ - ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function) \ + ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),function) \ .align ALIGNARG(4); \ C_LABEL(name) \ CALL_MCOUNT |