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Tue, 11 Mar 2025 00:59:46 GMT (envelope-from git) Date: Tue, 11 Mar 2025 00:59:46 GMT Message-Id: <202503110059.52B0xkvj052045@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org From: Konstantin Belousov Subject: git: dc1467c68df2 - stable/14 - amd64 csu: microoptimize startup List-Id: Commit messages for all branches of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-all List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: dev-commits-src-all@freebsd.org Sender: owner-dev-commits-src-all@FreeBSD.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: kib X-Git-Repository: src X-Git-Refname: refs/heads/stable/14 X-Git-Reftype: branch X-Git-Commit: dc1467c68df2e9a3bb0b212924b2131950cd1305 Auto-Submitted: auto-generated The branch stable/14 has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=dc1467c68df2e9a3bb0b212924b2131950cd1305 commit dc1467c68df2e9a3bb0b212924b2131950cd1305 Author: Konstantin Belousov AuthorDate: 2025-03-02 23:54:24 +0000 Commit: Konstantin Belousov CommitDate: 2025-03-11 00:59:11 +0000 amd64 csu: microoptimize startup (cherry picked from commit cb991a228179639cc0568fdd5d4b4b07b6f47b5a) --- lib/csu/amd64/crt1_s.S | 15 ++++++--------- 1 file changed, 6 insertions(+), 9 deletions(-) diff --git a/lib/csu/amd64/crt1_s.S b/lib/csu/amd64/crt1_s.S index f7ea076d94f1..3ceea9289330 100644 --- a/lib/csu/amd64/crt1_s.S +++ b/lib/csu/amd64/crt1_s.S @@ -49,15 +49,12 @@ _start: #ifdef GCRT subq $16, %rsp #endif - movq %rsi, %rcx - movq %rdi, %rsi /* argv = ap */ - addq $8, %rsi /* argv += 1 */ - movq %rdi, %rdx /* env = ap */ - addq $16, %rdx /* env += 2 */ - movslq (%rdi), %rax - movl %eax, %edi /* argc = *(long *)(void *)ap */ - shlq $3, %rax - addq %rax, %rdx /* env += argc */ + movq %rsi, %rcx /* cleanup */ + movslq (%rdi), %rax /* long *ap; tmpargc = *ap */ + leaq 0x8(%rdi), %rsi /* argv = ap + 1 */ + leaq 0x10(%rdi, %rax, 8), %rdx /* env = ap + 2 + tmpargc */ + movl %eax, %edi /* argc = tmpargc */ + #ifdef PIC /* * XXX. %rip relative addressing is not intended for use in the