From patchwork Mon Oct 27 07:59:35 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Pinski X-Patchwork-Id: 3403 Received: (qmail 15440 invoked by alias); 27 Oct 2014 08:00:02 -0000 Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org Delivered-To: mailing list libc-alpha@sourceware.org Received: (qmail 15289 invoked by uid 89); 27 Oct 2014 08:00:00 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-2.5 required=5.0 tests=AWL, BAYES_00, RCVD_IN_DNSWL_LOW autolearn=ham version=3.3.2 X-HELO: mail-ie0-f180.google.com X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=0mjFdygCQbSKAoAcS8EjHAKZj66PdxV5v7zZ7EuP9pg=; b=RAfrby+O7e8qsCqEWN1doAl+3+ipY9MfcCGLEYebTwmfzi3k/RRGK+386G3zlfpNbY gg2zvzs66QjMtxU8EJ/EFfQBooolG+ahejztMWTVcEDskAZUeH15ZX9nCyebMi0eO2/T eJyj5bOxZ0cVpe0Yat2DkxhMiVsHduD7Cr3pcL18GxlKrq1yGCQmwa/S4pVZr/TeaUMx awVzbu5HSiBur6gWAN0TtSeT4zPmVMmhYph/MOT9CvYCaQ4T+6RK7gq4Z921PXS0HRdb xt/KSlSsEt1jef0WlWaeR2p23w51APWtZURTlt2vVpzzlEUJF/HX6Vcy7+BEqDhlxekT FwbQ== X-Gm-Message-State: ALoCoQn8OY8RWyA1YgWhGAr5oYs4LQg324Iinj6NL7HEc1VY6aFvmlgDmoSttyIiliLcfXj+r1Z0 X-Received: by 10.50.25.71 with SMTP id a7mr20496264igg.48.1414396796820; Mon, 27 Oct 2014 00:59:56 -0700 (PDT) From: Andrew Pinski To: libc-alpha@sourceware.org Cc: Andrew Pinski Subject: [PATCH 11/29] [AARCH64] Use PTR_REG in crti.S. Date: Mon, 27 Oct 2014 00:59:35 -0700 Message-Id: <1414396793-9005-12-git-send-email-apinski@cavium.com> In-Reply-To: <1414396793-9005-1-git-send-email-apinski@cavium.com> References: <1414396793-9005-1-git-send-email-apinski@cavium.com> call_weak_fn loads from a pointer, so use PTR_REG so the load is 32bits for ILP32. * sysdeps/aarch64/crti.S: Include sysdep.h (call_weak_fn): Use PTR_REG when loading from PREINIT_FUNCTION. AARCH64: Make RTLD_START paramatizable Make RTLD_START paramatizable for ILP32 and LP64 usage and provides common code between ILP32. * sysdeps/aarch64/dl-machine.h (RTLD_START): Rename to ... (RTLD_START_1): This and add PTR, PTR_SIZE_LOG, and PTR_SP arguments. (RTLD_START): New macro which uses RTLD_START_1. --- sysdeps/aarch64/crti.S | 3 +- sysdeps/aarch64/dl-machine.h | 130 ++++++++++++++++++++++-------------------- 2 files changed, 70 insertions(+), 63 deletions(-) diff --git a/sysdeps/aarch64/crti.S b/sysdeps/aarch64/crti.S index 2db7b67..d31bb50 100644 --- a/sysdeps/aarch64/crti.S +++ b/sysdeps/aarch64/crti.S @@ -39,6 +39,7 @@ they can be called as functions. The symbols _init and _fini are magic and cause the linker to emit DT_INIT and DT_FINI. */ +#include #include #ifndef PREINIT_FUNCTION @@ -60,7 +61,7 @@ .type call_weak_fn, %function call_weak_fn: adrp x0, :got:PREINIT_FUNCTION - ldr x0, [x0, #:got_lo12:PREINIT_FUNCTION] + ldr PTR_REG(0), [x0, #:got_lo12:PREINIT_FUNCTION] cbz x0, 1f b PREINIT_FUNCTION 1: diff --git a/sysdeps/aarch64/dl-machine.h b/sysdeps/aarch64/dl-machine.h index 4317669..6e041b1 100644 --- a/sysdeps/aarch64/dl-machine.h +++ b/sysdeps/aarch64/dl-machine.h @@ -123,68 +123,74 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile) /* Initial entry point for the dynamic linker. The C function _dl_start is the real entry point, its return value is the user program's entry point */ +#ifdef __LP64__ +#define RTLD_START RTLD_START_1("x", "3", "sp") +#else +#define RTLD_START RTLD_START_1("w", "2", "wsp") +#endif + -#define RTLD_START asm ("\ -.text \n\ -.globl _start \n\ -.type _start, %function \n\ -.globl _dl_start_user \n\ -.type _dl_start_user, %function \n\ -_start: \n\ - mov x0, sp \n\ - bl _dl_start \n\ - // returns user entry point in x0 \n\ - mov x21, x0 \n\ -_dl_start_user: \n\ - // get the original arg count \n\ - ldr x1, [sp] \n\ - // get the argv address \n\ - add x2, sp, #8 \n\ - // get _dl_skip_args to see if we were \n\ - // invoked as an executable \n\ - adrp x4, _dl_skip_args \n\ - ldr w4, [x4, #:lo12:_dl_skip_args] \n\ - // do we need to adjust argc/argv \n\ - cmp w4, 0 \n\ - beq .L_done_stack_adjust \n\ - // subtract _dl_skip_args from original arg count \n\ - sub x1, x1, x4 \n\ - // store adjusted argc back to stack \n\ - str x1, [sp] \n\ - // find the first unskipped argument \n\ - mov x3, x2 \n\ - add x4, x2, x4, lsl #3 \n\ - // shuffle argv down \n\ -1: ldr x5, [x4], #8 \n\ - str x5, [x3], #8 \n\ - cmp x5, #0 \n\ - bne 1b \n\ - // shuffle envp down \n\ -1: ldr x5, [x4], #8 \n\ - str x5, [x3], #8 \n\ - cmp x5, #0 \n\ - bne 1b \n\ - // shuffle auxv down \n\ -1: ldp x0, x5, [x4, #16]! \n\ - stp x0, x5, [x3], #16 \n\ - cmp x0, #0 \n\ - bne 1b \n\ - // Update _dl_argv \n\ - adrp x3, _dl_argv \n\ - str x2, [x3, #:lo12:_dl_argv] \n\ -.L_done_stack_adjust: \n\ - // compute envp \n\ - add x3, x2, x1, lsl #3 \n\ - add x3, x3, #8 \n\ - adrp x16, _rtld_local \n\ - add x16, x16, #:lo12:_rtld_local \n\ - ldr x0, [x16] \n\ - bl _dl_init_internal \n\ - // load the finalizer function \n\ - adrp x0, _dl_fini \n\ - add x0, x0, #:lo12:_dl_fini \n\ - // jump to the user_s entry point \n\ - br x21 \n\ +#define RTLD_START_1(PTR, PTR_SIZE_LOG, PTR_SP) asm ("\ +.text \n\ +.globl _start \n\ +.type _start, %function \n\ +.globl _dl_start_user \n\ +.type _dl_start_user, %function \n\ +_start: \n\ + mov " PTR "0, " PTR_SP " \n\ + bl _dl_start \n\ + // returns user entry point in x0 \n\ + mov x21, x0 \n\ +_dl_start_user: \n\ + // get the original arg count \n\ + ldr " PTR "1, [sp] \n\ + // get the argv address \n\ + add " PTR "2, " PTR_SP ", #(1<<" PTR_SIZE_LOG ") \n\ + // get _dl_skip_args to see if we were \n\ + // invoked as an executable \n\ + adrp x4, _dl_skip_args \n\ + ldr w4, [x4, #:lo12:_dl_skip_args] \n\ + // do we need to adjust argc/argv \n\ + cmp w4, 0 \n\ + beq .L_done_stack_adjust \n\ + // subtract _dl_skip_args from original arg count \n\ + sub " PTR "1, " PTR "1, " PTR "4 \n\ + // store adjusted argc back to stack \n\ + str " PTR "1, [sp] \n\ + // find the first unskipped argument \n\ + mov " PTR "3, " PTR "2 \n\ + add " PTR "4, " PTR "2, " PTR "4, lsl #" PTR_SIZE_LOG " \n\ + // shuffle argv down \n\ +1: ldr " PTR "5, [x4], #(1<<" PTR_SIZE_LOG ") \n\ + str " PTR "5, [x3], #(1<<" PTR_SIZE_LOG ") \n\ + cmp " PTR "5, #0 \n\ + bne 1b \n\ + // shuffle envp down \n\ +1: ldr " PTR "5, [x4], #(1<<" PTR_SIZE_LOG ") \n\ + str " PTR "5, [x3], #(1<<" PTR_SIZE_LOG ") \n\ + cmp " PTR "5, #0 \n\ + bne 1b \n\ + // shuffle auxv down \n\ +1: ldp " PTR "0, " PTR "5, [x4, #(2<<" PTR_SIZE_LOG ")]! \n\ + stp " PTR "0, " PTR "5, [x3], #(2<<" PTR_SIZE_LOG ") \n\ + cmp " PTR "0, #0 \n\ + bne 1b \n\ + // Update _dl_argv \n\ + adrp x3, _dl_argv \n\ + str " PTR "2, [x3, #:lo12:_dl_argv] \n\ +.L_done_stack_adjust: \n\ + // compute envp \n\ + add " PTR "3, " PTR "2, " PTR "1, lsl #" PTR_SIZE_LOG " \n\ + add " PTR "3, " PTR "3, #(1<<" PTR_SIZE_LOG ") \n\ + adrp x16, _rtld_local \n\ + add " PTR "16, " PTR "16, #:lo12:_rtld_local \n\ + ldr " PTR "0, [x16] \n\ + bl _dl_init_internal \n\ + // load the finalizer function \n\ + adrp x0, _dl_fini \n\ + add " PTR "0, " PTR "0, #:lo12:_dl_fini \n\ + // jump to the user_s entry point \n\ + br x21 \n\ "); #define elf_machine_type_class(type) \