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Diffstat (limited to 'src/ldso/aarch64')
-rw-r--r--src/ldso/aarch64/dlsym.s5
-rw-r--r--src/ldso/aarch64/start.s18
-rw-r--r--src/ldso/aarch64/tlsdesc.s92
3 files changed, 115 insertions, 0 deletions
diff --git a/src/ldso/aarch64/dlsym.s b/src/ldso/aarch64/dlsym.s
new file mode 100644
index 00000000..be2dce52
--- /dev/null
+++ b/src/ldso/aarch64/dlsym.s
@@ -0,0 +1,5 @@
+.global dlsym
+.type dlsym,%function
+dlsym:
+ mov x2,x30
+ b __dlsym
diff --git a/src/ldso/aarch64/start.s b/src/ldso/aarch64/start.s
new file mode 100644
index 00000000..41d1d1e2
--- /dev/null
+++ b/src/ldso/aarch64/start.s
@@ -0,0 +1,18 @@
+.global _dlstart
+_dlstart:
+ ldr x0,[sp]
+ add x1,sp,#8
+ bl __dynlink
+ mov x1,sp
+ ldr x2,[x1],#8
+1: sub x2,x2,1
+ ldr x3,[x1],#8
+ cmn x3,#1
+ b.eq 1b
+ add x2,x2,1
+ str x3,[x1,#-8]!
+ str x2,[x1,#-8]!
+ mov sp,x1
+ mov x1,x0
+ mov x0,#0
+ blr x1
diff --git a/src/ldso/aarch64/tlsdesc.s b/src/ldso/aarch64/tlsdesc.s
new file mode 100644
index 00000000..32064bd7
--- /dev/null
+++ b/src/ldso/aarch64/tlsdesc.s
@@ -0,0 +1,92 @@
+// long __tlsdesc_static(long *a)
+// {
+// return a[1];
+// }
+.global __tlsdesc_static
+.type __tlsdesc_static,@function
+__tlsdesc_static:
+ ldr x0,[x0,#8]
+ ret
+
+// long __tlsdesc_dynamic(long *a)
+// {
+// struct {size_t modidx,off;} *p = (void*)a[1];
+// size_t *dtv = *(size_t**)(tp + 16 - 8);
+// if (p->modidx <= dtv[0])
+// return dtv[p->modidx] + p->off - tp;
+// return __tls_get_addr(p) - tp;
+// }
+.global __tlsdesc_dynamic
+.type __tlsdesc_dynamic,@function
+__tlsdesc_dynamic:
+ stp x1,x2,[sp,#-32]!
+ stp x3,x4,[sp,#16]
+ mrs x1,tpidr_el0 // tp
+ ldr x0,[x0,#8] // p
+ ldr x2,[x0] // p->modidx
+ add x3,x1,#8
+ ldr x3,[x3] // dtv
+ ldr x4,[x3] // dtv[0]
+ cmp x2,x4
+ b.hi 1f
+ ldr x2,[x3,x2,lsl #3] // dtv[p->modidx]
+ ldr x0,[x0,#8] // p->off
+ add x0,x0,x2
+2: sub x0,x0,x1
+ ldp x3,x4,[sp,#16]
+ ldp x1,x2,[sp],#32
+ ret
+
+ // save all registers __tls_get_addr may clobber
+ // ugly because addr offset must be in [-512,509]
+1: stp x29,x30,[sp,#-160]!
+ stp x5,x6,[sp,#16]
+ stp x7,x8,[sp,#32]
+ stp x9,x10,[sp,#48]
+ stp x11,x12,[sp,#64]
+ stp x13,x14,[sp,#80]
+ stp x15,x16,[sp,#96]
+ stp x17,x18,[sp,#112]
+ stp q0,q1,[sp,#128]
+ stp q2,q3,[sp,#-480]!
+ stp q4,q5,[sp,#32]
+ stp q6,q7,[sp,#64]
+ stp q8,q9,[sp,#96]
+ stp q10,q11,[sp,#128]
+ stp q12,q13,[sp,#160]
+ stp q14,q15,[sp,#192]
+ stp q16,q17,[sp,#224]
+ stp q18,q19,[sp,#256]
+ stp q20,q21,[sp,#288]
+ stp q22,q23,[sp,#320]
+ stp q24,q25,[sp,#352]
+ stp q26,q27,[sp,#384]
+ stp q28,q29,[sp,#416]
+ stp q30,q31,[sp,#448]
+ bl __tls_get_addr
+ mrs x1,tpidr_el0
+ ldp q4,q5,[sp,#32]
+ ldp q6,q7,[sp,#64]
+ ldp q8,q9,[sp,#96]
+ ldp q10,q11,[sp,#128]
+ ldp q12,q13,[sp,#160]
+ ldp q14,q15,[sp,#192]
+ ldp q16,q17,[sp,#224]
+ ldp q18,q19,[sp,#256]
+ ldp q20,q21,[sp,#288]
+ ldp q22,q23,[sp,#320]
+ ldp q24,q25,[sp,#352]
+ ldp q26,q27,[sp,#384]
+ ldp q28,q29,[sp,#416]
+ ldp q30,q31,[sp,#448]
+ ldp q2,q3,[sp],#480
+ ldp x5,x6,[sp,#16]
+ ldp x7,x8,[sp,#32]
+ ldp x9,x10,[sp,#48]
+ ldp x11,x12,[sp,#64]
+ ldp x13,x14,[sp,#80]
+ ldp x15,x16,[sp,#96]
+ ldp x17,x18,[sp,#112]
+ ldp q0,q1,[sp,#128]
+ ldp x29,x30,[sp],#160
+ b 2b