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authorNicholas J. Kain <njkain@gmail.com>2011-02-15 07:32:09 -0500
committerNicholas J. Kain <njkain@gmail.com>2011-02-15 07:32:09 -0500
commit1e12632591ab98a6ea3af8680716c28282552981 (patch)
tree5b79bd9a0b950d6ab414fef8cbb5dfcd1a6d2e83 /src
parentc2afb747b0296f23cd1903e82ccbdee3fc2978fd (diff)
downloadmusl-1e12632591ab98a6ea3af8680716c28282552981.tar.gz
Port musl to x86-64. One giant commit!
Diffstat (limited to 'src')
-rw-r--r--src/math/x86_64/e_sqrt.s3
-rw-r--r--src/math/x86_64/e_sqrtf.s3
-rw-r--r--src/setjmp/x86_64/longjmp.s24
-rw-r--r--src/setjmp/x86_64/setjmp.s25
-rw-r--r--src/signal/x86_64/restore.s11
-rw-r--r--src/signal/x86_64/sigsetjmp.s11
-rw-r--r--src/thread/x86_64/__set_thread_area.s15
-rw-r--r--src/thread/x86_64/__unmapself.s24
-rw-r--r--src/thread/x86_64/clone.s22
9 files changed, 138 insertions, 0 deletions
diff --git a/src/math/x86_64/e_sqrt.s b/src/math/x86_64/e_sqrt.s
new file mode 100644
index 00000000..64de7d6a
--- /dev/null
+++ b/src/math/x86_64/e_sqrt.s
@@ -0,0 +1,3 @@
+.global sqrt
+sqrt: sqrtsd %xmm0, %xmm0
+ ret
diff --git a/src/math/x86_64/e_sqrtf.s b/src/math/x86_64/e_sqrtf.s
new file mode 100644
index 00000000..2c77076b
--- /dev/null
+++ b/src/math/x86_64/e_sqrtf.s
@@ -0,0 +1,3 @@
+.global sqrtf
+sqrtf: sqrtss %xmm0, %xmm0
+ ret
diff --git a/src/setjmp/x86_64/longjmp.s b/src/setjmp/x86_64/longjmp.s
new file mode 100644
index 00000000..c63b0c95
--- /dev/null
+++ b/src/setjmp/x86_64/longjmp.s
@@ -0,0 +1,24 @@
+/* Copyright 2011 Nicholas J. Kain, licensed GNU LGPL 2.1 or later */
+.global _longjmp
+.global longjmp
+.type _longjmp,%function
+.type longjmp,%function
+_longjmp:
+longjmp:
+ mov %rsi,%rax /* val will be longjmp return */
+ test %rax,%rax
+ jnz .L0
+ inc %rax /* if val==0, val=1 per longjmp semantics */
+.L0:
+ movq (%rdi),%rbx /* rdi is the jmp_buf, restore regs from it */
+ movq 8(%rdi),%rbp
+ movq 16(%rdi),%r12
+ movq 24(%rdi),%r13
+ movq 32(%rdi),%r14
+ movq 40(%rdi),%r15
+ movq 48(%rdi),%rdx /* this ends up being the stack pointer */
+ mov %rdx,%rsp
+ movq 56(%rdi),%rdx /* this is the instruction pointer */
+ jmp *%rdx /* goto saved address without altering rsp */
+.size _longjmp,.-_longjmp
+.size longjmp,.-longjmp
diff --git a/src/setjmp/x86_64/setjmp.s b/src/setjmp/x86_64/setjmp.s
new file mode 100644
index 00000000..8f29fa81
--- /dev/null
+++ b/src/setjmp/x86_64/setjmp.s
@@ -0,0 +1,25 @@
+/* Copyright 2011 Nicholas J. Kain, licensed GNU LGPL 2.1 or later */
+.global __setjmp
+.global _setjmp
+.global setjmp
+.type __setjmp,%function
+.type _setjmp,%function
+.type setjmp,%function
+__setjmp:
+_setjmp:
+setjmp:
+ mov %rbx,(%rdi) /* rdi is jmp_buf, move registers onto it */
+ mov %rbp,8(%rdi)
+ mov %r12,16(%rdi)
+ mov %r13,24(%rdi)
+ mov %r14,32(%rdi)
+ mov %r15,40(%rdi)
+ leaq 8(%rsp),%rdx /* this is our rsp WITHOUT current ret addr */
+ mov %rdx,48(%rdi)
+ movq (%rsp),%rdx /* save return addr ptr for new rip */
+ mov %rdx,56(%rdi)
+ xor %rax,%rax /* always return 0 */
+ ret
+.size __setjmp,.-__setjmp
+.size _setjmp,.-_setjmp
+.size setjmp,.-setjmp
diff --git a/src/signal/x86_64/restore.s b/src/signal/x86_64/restore.s
new file mode 100644
index 00000000..bc5e0d74
--- /dev/null
+++ b/src/signal/x86_64/restore.s
@@ -0,0 +1,11 @@
+.global __restore_rt
+.global __restore
+.type __restore_rt,%function
+.type __restore,%function
+__restore_rt:
+__restore:
+ movl $15, %eax
+ syscall
+.size __restore_rt,.-__restore_rt
+.size __restore,.-__restore
+
diff --git a/src/signal/x86_64/sigsetjmp.s b/src/signal/x86_64/sigsetjmp.s
new file mode 100644
index 00000000..0a450785
--- /dev/null
+++ b/src/signal/x86_64/sigsetjmp.s
@@ -0,0 +1,11 @@
+/* Copyright 2011 Nicholas J. Kain, licensed GNU LGPL 2.1 or later */
+.global sigsetjmp
+sigsetjmp:
+ test %rsi,%rsi
+ jz 1f /* if save == 0, just goto setjmp */
+ movq %rsi,64(%rdi) /* move save -> jmp_buf[8] */
+ addq $72,%rdi /* add sizeof(jmp_buf) to rdi */
+ movl $0,%esi /* arg2 = 0 */
+ movl $2,%edx /* arg3 = 2 */
+ call sigprocmask /* sigprocmask(jmp_buf, 0, 2) */
+1: jmp setjmp
diff --git a/src/thread/x86_64/__set_thread_area.s b/src/thread/x86_64/__set_thread_area.s
new file mode 100644
index 00000000..ed35b7a8
--- /dev/null
+++ b/src/thread/x86_64/__set_thread_area.s
@@ -0,0 +1,15 @@
+/* Copyright 2011 Nicholas J. Kain, licensed GNU LGPL 2.1 or later */
+.text
+.global __set_thread_area
+.type __set_thread_area,%function
+__set_thread_area:
+ push %rbx /* save x86_64 abi clobbered registers */
+ push %r11
+ mov %rdi,%rsi /* shift for syscall */
+ movl $0x1002,%edi /* SET_FS register */
+ movl $158,%eax /* set fs segment to */
+ syscall /* arch_prctl(SET_FS, arg)*/
+ pop %r11 /* restore clobbered registers */
+ pop %rbx
+ ret
+.size __set_thread_area,.-__set_thread_area
diff --git a/src/thread/x86_64/__unmapself.s b/src/thread/x86_64/__unmapself.s
new file mode 100644
index 00000000..59092eaa
--- /dev/null
+++ b/src/thread/x86_64/__unmapself.s
@@ -0,0 +1,24 @@
+/* Copyright 2011 Nicholas J. Kain, licensed GNU LGPL 2.1 or later */
+.text
+.global __unmapself
+.type __unmapself,%function
+__unmapself:
+ call 1f /* glibc ABI compat */
+ .long -1
+ .long -1
+1: push %rsi /* save arg2 for munmap */
+ push %rdx /* save arg3 for munmap */
+ mov %rdi,%rsi /* rt_sigprocmask() args: move arg1 to rsi */
+ xor %rdi,%rdi
+ xor %rdx,%rdx
+ movq $8,%r10
+ movl $14,%eax /* __NR_rt_sigprocmask */
+ syscall /* call rt_sigprocmask(0,arg1,0,8) */
+ pop %rsi /* munmap() args: reload from stack */
+ pop %rdi
+ movl $11,%eax /* __NR_munmap */
+ syscall /* munmap(arg2,arg3) */
+ xor %rdi,%rdi /* exit() args: always return success */
+ movl $60,%eax /* __NR_exit */
+ syscall /* exit(0) */
+.size __unmapself,.-__unmapself
diff --git a/src/thread/x86_64/clone.s b/src/thread/x86_64/clone.s
new file mode 100644
index 00000000..51410051
--- /dev/null
+++ b/src/thread/x86_64/clone.s
@@ -0,0 +1,22 @@
+/* Copyright 2011 Nicholas J. Kain, licensed GNU LGPL 2.1 or later */
+.text
+.global __uniclone
+.type __uniclone,%function
+/* rdi = child_stack, rsi = start, rdx = pthread_struct */
+__uniclone:
+ subq $16,%rdi /* grow child_stack */
+ mov %rsi,8(%rdi) /* push start onto child_stack as return ptr */
+ mov %rdx,0(%rdi) /* push pthread_struct onto child_stack */
+ mov %rdx,%r8 /* r8 = tls */
+ mov %rdi,%rsi /* rsi = child_stack */
+ leaq 40(%rdx),%r10 /* r10 = child_id */
+ movl $56,%eax /* clone syscall number */
+ movl $0x7d0f00,%edi /* rdi = flags */
+ mov %r10,%rdx /* rdx = parent_id */
+ syscall /* clone(flags, child_stack, parent_id,
+ * child_id, tls) */
+ test %rax,%rax
+ jnz 1f /* if we're in the parent -> goto 1f */
+ pop %rdi /* restore pthread_struct from child stack */
+1: ret
+.size __uniclone,.-__uniclone