get rid of pthreads

[ginge.git] / loader / syscalls.S

diff --git a/loader/syscalls.S b/loader/syscalls.S
new file mode 100644 (file)
index 0000000..e72e7d2
--- /dev/null
+++ b/loader/syscalls.S
@@ -0,0 +1,88 @@
+@ vim:filetype=armasm
+#include <sys/syscall.h>
+
+
+.global sys_cacheflush @ const void *start_addr, const void *end_addr
+sys_cacheflush:
+    mov     r2, #0
+#ifdef __ARM_EABI__
+    /* EABI version */
+    str     r7, [sp, #-4]!
+    mov     r7, #(__ARM_NR_cacheflush & 0xff)
+#if (__ARM_NR_cacheflush & 0x00ff00)
+    orr     r7, r7, #(__ARM_NR_cacheflush & 0x00ff00)
+#endif
+#if (__ARM_NR_cacheflush & 0xff0000)
+    orr     r7, r7, #(__ARM_NR_cacheflush & 0xff0000)
+#endif
+    swi     0
+    ldr     r7, [sp], #4
+#else
+    /* OABI */
+    swi     __ARM_NR_cacheflush
+#endif
+    bx      lr
+
+
+#ifdef __ARM_EABI__
+#error hm?
+#endif
+
+.global g_syscall
+g_syscall:
+    mov   r12, sp
+    stmfd sp!, {r4, r5, r6}
+    ldmia r12, {r4, r5, r6}
+    swi   __NR_syscall
+    ldmfd sp!, {r4, r5, r6}
+
+.global g_syscall_error
+g_syscall_error:
+    cmn   r0, #4096
+    bxcc  lr
+    stmfd sp!, {r4, lr}
+    rsb   r4, r0, #0
+    bl    __errno_location
+    str   r4, [r0]
+    mov   r0, #-1
+    ldmfd sp!, {r4, pc}
+
+.global g_clone
+g_clone:
+    ldr   r12,[sp, #4]      @ arg6 - convenience func ptr
+    str   r4, [sp, #-4]!
+    ldr   r4, [sp, #4]      @ arg5
+    swi   __NR_clone
+    tst   r0, r0
+    bxeq  r12               @ child
+    cmn   r0, #4096
+    ldr   r4, [sp], #4
+    bcs   g_syscall_error
+    bx    lr
+
+@ raw - no errno
+.macro raw_syscall_easy name nr
+.global \name
+\name:
+    swi   \nr
+    bx    lr
+.endm
+
+.macro raw_syscall name nr
+.global \name
+\name:
+    mov   r12, sp
+    stmfd sp!, {r4, r5, r6, lr}
+    ldmia r12, {r4, r5, r6}
+    swi   \nr
+    stmfd sp!, {r4, r5, r6, pc}
+.endm
+
+raw_syscall_easy g_open_raw,           __NR_open
+raw_syscall_easy g_read_raw,           __NR_read
+raw_syscall_easy g_write_raw,          __NR_write
+raw_syscall_easy g_futex_raw,          __NR_futex
+raw_syscall_easy g_nanosleep_raw,      __NR_nanosleep
+raw_syscall_easy g_clock_gettime_raw,  __NR_clock_gettime
+raw_syscall_easy g_rt_sigprocmask_raw, __NR_rt_sigprocmask
+