From 47f0752a488e8d8106811595b3a0534c7edf4b5b Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Sat, 4 Dec 2004 21:20:17 +0000 Subject: [PATCH] 2004-11-18 Daniel Jacobowitz * sysdeps/arm/sysdep.h: Define __USE_BX__ if bx is available. Use it instead of __THUMB_INTERWORK__. Make RETINSTR take only a condition and a register. * sysdeps/arm/dl-machine.h: Use __USE_BX__ instead of __THUMB_INTERWORK__. (_dl_start_user): Use BX. * sysdeps/arm/strlen.S: Use DO_RET. * sysdeps/unix/arm/brk.S, sysdeps/unix/arm/fork.S, sysdeps/unix/arm/sysdep.S, sysdeps/unix/arm/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/arm/clone.S, sysdeps/unix/sysv/linux/arm/mmap.S, sysdeps/unix/sysv/linux/arm/mmap64.S, sysdeps/unix/sysv/linux/arm/socket.S, sysdeps/unix/sysv/linux/arm/sysdep.h, sysdeps/unix/sysv/linux/arm/vfork.S: Update uses of RETINSTR. --- sysdeps/arm/dl-machine.h | 4 ++-- sysdeps/arm/strlen.S | 2 +- sysdeps/arm/sysdep.h | 17 ++++++++++++----- sysdeps/unix/arm/brk.S | 2 +- sysdeps/unix/arm/fork.S | 2 +- sysdeps/unix/arm/sysdep.S | 4 ++-- sysdeps/unix/arm/sysdep.h | 2 +- sysdeps/unix/sysv/linux/arm/clone.S | 2 +- sysdeps/unix/sysv/linux/arm/mmap.S | 4 ++-- sysdeps/unix/sysv/linux/arm/mmap64.S | 4 ++-- sysdeps/unix/sysv/linux/arm/socket.S | 4 ++-- sysdeps/unix/sysv/linux/arm/sysdep.h | 4 ++-- sysdeps/unix/sysv/linux/arm/vfork.S | 4 ++-- 13 files changed, 31 insertions(+), 24 deletions(-) diff --git a/sysdeps/arm/dl-machine.h b/sysdeps/arm/dl-machine.h index 5dfe3346..761f8dae 100644 --- a/sysdeps/arm/dl-machine.h +++ b/sysdeps/arm/dl-machine.h @@ -123,7 +123,7 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile) return lazy; } -#if defined(__THUMB_INTERWORK__) +#if defined(__USE_BX__) #define BX(x) "bx\t" #x #else #define BX(x) "mov\tpc, " #x @@ -293,7 +293,7 @@ _dl_start_user:\n\ ldr r0, .L_FINI_PROC\n\ add r0, sl, r0\n\ @ jump to the user_s entry point\n\ - mov pc, r6\n\ + " BX(r6) "\n\ .L_GET_GOT:\n\ .word _GLOBAL_OFFSET_TABLE_ - .L_GOT_GOT - 4\n\ .L_SKIP_ARGS:\n\ diff --git a/sysdeps/arm/strlen.S b/sysdeps/arm/strlen.S index a83c41d2..86e16652 100644 --- a/sysdeps/arm/strlen.S +++ b/sysdeps/arm/strlen.S @@ -68,6 +68,6 @@ Llastword: @ drop through to here once we find a tstne r2, $0x00ff0000 @ (if first three all non-zero, 4th addne r0, r0, $1 @ must be zero) #endif - RETINSTR(mov,pc,lr) + DO_RET(lr) END(strlen) libc_hidden_builtin_def (strlen) diff --git a/sysdeps/arm/sysdep.h b/sysdeps/arm/sysdep.h index cb3f105a..8ca77a60 100644 --- a/sysdeps/arm/sysdep.h +++ b/sysdeps/arm/sysdep.h @@ -19,6 +19,11 @@ #include +#if (!defined (__ARM_ARCH_2__) && !defined (__ARM_ARCH_3__) \ + && !defined (__ARM_ARCH_3M__) && !defined (__ARM_ARCH_4__)) +# define __USE_BX__ +#endif + #ifdef __ASSEMBLER__ /* Syntactic details of assembler. */ @@ -50,20 +55,22 @@ #ifdef __APCS_32__ #define LOADREGS(cond, base, reglist...)\ ldm##cond base,reglist -#define RETINSTR(instr, regs...)\ - instr regs -#ifdef __THUMB_INTERWORK__ +#ifdef __USE_BX__ +#define RETINSTR(cond, reg) \ + bx##cond reg #define DO_RET(_reg) \ bx _reg #else +#define RETINSTR(cond, reg) \ + mov##cond pc, reg #define DO_RET(_reg) \ mov pc, _reg #endif #else /* APCS-26 */ #define LOADREGS(cond, base, reglist...)\ ldm##cond base,reglist^ -#define RETINSTR(instr, regs...)\ - instr##s regs +#define RETINSTR(cond, reg) \ + mov##cond##s pc, reg #define DO_RET(_reg) \ movs pc, _reg #endif diff --git a/sysdeps/unix/arm/brk.S b/sysdeps/unix/arm/brk.S index 9e20dc69..914e8a8b 100644 --- a/sysdeps/unix/arm/brk.S +++ b/sysdeps/unix/arm/brk.S @@ -43,7 +43,7 @@ SYSCALL__ (brk, 1) #endif str r0, [r1] mov r0, $0 - RETINSTR(mov, pc, r14) + DO_RET (r14) #ifdef PIC 1: .long _GLOBAL_OFFSET_TABLE_ - 2b - 8 _cb_addr: diff --git a/sysdeps/unix/arm/fork.S b/sysdeps/unix/arm/fork.S index b317b66a..bd00c92c 100644 --- a/sysdeps/unix/arm/fork.S +++ b/sysdeps/unix/arm/fork.S @@ -27,7 +27,7 @@ SYSCALL__ (fork, 0) R0&-1==R0, and the child gets R0&0==0. */ sub r1, r1, $1 and r0, r0, r1 - RETINSTR(mov, pc, r14) + DO_RET (r14) PSEUDO_END (__fork) libc_hidden_def (__fork) diff --git a/sysdeps/unix/arm/sysdep.S b/sysdeps/unix/arm/sysdep.S index 5fc80a87..4810805d 100644 --- a/sysdeps/unix/arm/sysdep.S +++ b/sysdeps/unix/arm/sysdep.S @@ -50,7 +50,7 @@ syscall_error: ldr r1, 1f str r0, [r1] mvn r0, $0 - RETINSTR(mov, pc, r14) + DO_RET (r14) 1: .long C_SYMBOL_NAME(errno) #else @@ -60,7 +60,7 @@ syscall_error: 0: add r2, pc, r2 str r0, [r1, r2] mvn r0, $0 - RETINSTR(mov, pc, r14) + DO_RET (r14) 1: .word _GLOBAL_OFFSET_TABLE_ - 0b - 8 2: .word C_SYMBOL_NAME(errno)(GOTOFF) diff --git a/sysdeps/unix/arm/sysdep.h b/sysdeps/unix/arm/sysdep.h index d776b45a..5f36272f 100644 --- a/sysdeps/unix/arm/sysdep.h +++ b/sysdeps/unix/arm/sysdep.h @@ -24,7 +24,7 @@ #ifdef __ASSEMBLER__ -#define ret RETINSTR(mov, pc, r14) +#define ret DO_RET (r14) #define MOVE(a,b) mov b,a #endif diff --git a/sysdeps/unix/sysv/linux/arm/clone.S b/sysdeps/unix/sysv/linux/arm/clone.S index 1c6f7861..bf07fb39 100644 --- a/sysdeps/unix/sysv/linux/arm/clone.S +++ b/sysdeps/unix/sysv/linux/arm/clone.S @@ -45,7 +45,7 @@ ENTRY(__clone) swi SYS_ify(clone) movs a1, a1 blt PLTJMP(C_SYMBOL_NAME(__syscall_error)) - RETINSTR(movne, pc, lr) + RETINSTR(ne, lr) @ pick the function arg and call address off the stack and execute ldr r0, [sp, #4] diff --git a/sysdeps/unix/sysv/linux/arm/mmap.S b/sysdeps/unix/sysv/linux/arm/mmap.S index 7beba684..cf6f2533 100644 --- a/sysdeps/unix/sysv/linux/arm/mmap.S +++ b/sysdeps/unix/sysv/linux/arm/mmap.S @@ -51,7 +51,7 @@ ENTRY (__mmap) ldr r5, [sp], #4 cmn r0, $4096 - RETINSTR(movcc, pc, lr) + RETINSTR(cc, lr) b PLTJMP(syscall_error) .Linval: @@ -83,7 +83,7 @@ ENTRY (__mmap) add sp, sp, #16 cmn r0, $4096 - RETINSTR(movcc, pc, lr) + RETINSTR(cc, lr) b PLTJMP(syscall_error); #endif diff --git a/sysdeps/unix/sysv/linux/arm/mmap64.S b/sysdeps/unix/sysv/linux/arm/mmap64.S index f8361b5c..b4b712c2 100644 --- a/sysdeps/unix/sysv/linux/arm/mmap64.S +++ b/sysdeps/unix/sysv/linux/arm/mmap64.S @@ -43,12 +43,12 @@ ENTRY (__mmap64) # ifdef __ASSUME_MMAP2_SYSCALL ldr r4, [sp], #4 ldr r5, [sp], #4 - RETINSTR(movcc, pc, lr) + RETINSTR(cc, lr) b PLTJMP(syscall_error) # else ldrcc r4, [sp], #4 ldrcc r5, [sp], #4 - RETINSTR(movcc, pc, lr) + RETINSTR(cc, lr) cmn r0, $ENOSYS bne .Lerror /* The current kernel does not support mmap2. Fall back to plain diff --git a/sysdeps/unix/sysv/linux/arm/socket.S b/sysdeps/unix/sysv/linux/arm/socket.S index 3e93ceb6..212a489a 100644 --- a/sysdeps/unix/sysv/linux/arm/socket.S +++ b/sysdeps/unix/sysv/linux/arm/socket.S @@ -91,7 +91,7 @@ ENTRY (__socket) /* r0 is < 0 if there was an error. */ cmn r0, $124 - RETINSTR(movcc, pc, r14) + RETINSTR(cc, r14) b PLTJMP(SYSCALL_ERROR) #if defined NEED_CANCELLATION && defined CENABLE @@ -114,7 +114,7 @@ ENTRY (__socket) /* r0 is < 0 if there was an error. */ cmn r0, $124 - RETINSTR(movcc, pc, r14) + RETINSTR(cc, r14) b PLTJMP(SYSCALL_ERROR) #endif diff --git a/sysdeps/unix/sysv/linux/arm/sysdep.h b/sysdeps/unix/sysv/linux/arm/sysdep.h index fda7c5b2..668aa1a2 100644 --- a/sysdeps/unix/sysv/linux/arm/sysdep.h +++ b/sysdeps/unix/sysv/linux/arm/sysdep.h @@ -54,7 +54,7 @@ cmn r0, $4096; #define PSEUDO_RET \ - RETINSTR(movcc, pc, lr); \ + RETINSTR(cc, lr); \ b PLTJMP(SYSCALL_ERROR) #undef ret #define ret PSEUDO_RET @@ -71,7 +71,7 @@ DO_CALL (syscall_name, args); #define PSEUDO_RET_NOERRNO \ - RETINSTR(mov, pc, lr); + DO_RET (lr); #undef ret_NOERRNO #define ret_NOERRNO PSEUDO_RET_NOERRNO diff --git a/sysdeps/unix/sysv/linux/arm/vfork.S b/sysdeps/unix/sysv/linux/arm/vfork.S index bba1a548..9ef5114b 100644 --- a/sysdeps/unix/sysv/linux/arm/vfork.S +++ b/sysdeps/unix/sysv/linux/arm/vfork.S @@ -32,7 +32,7 @@ ENTRY (__vfork) #ifdef __NR_vfork swi __NR_vfork cmn a1, #4096 - RETINSTR(movcc, pc, lr) + RETINSTR(cc, lr) # ifdef __ASSUME_VFORK_SYSCALL b PLTJMP(C_SYMBOL_NAME(__syscall_error)) @@ -47,7 +47,7 @@ ENTRY (__vfork) /* If we don't have vfork, fork is close enough. */ swi __NR_fork cmn a1, #4096 - RETINSTR(movcc, pc, lr) + RETINSTR(cc, lr) b PLTJMP(C_SYMBOL_NAME(__syscall_error)) #elif !defined __NR_vfork # error "__NR_vfork not available and __ASSUME_VFORK_SYSCALL defined" -- 2.11.4.GIT