[ginge.git] / loader / syscalls.S

@ vim:filetype=armasm
#include <sys/syscall.h>

@ support ancient toolchains (gcc 2.95.3 has upto 225)
#ifndef __NR_futex
#define __NR_futex			(__NR_SYSCALL_BASE+240)
#endif
#ifndef __NR_exit_group
#define __NR_exit_group			(__NR_SYSCALL_BASE+248)
#endif
#ifndef __NR_clock_gettime
#define __NR_clock_gettime		(__NR_SYSCALL_BASE+263)
#endif

.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
    ldmfd 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      g_mmap2_raw,          __NR_mmap2
raw_syscall_easy g_munmap_raw,         __NR_munmap
raw_syscall_easy g_ioctl_raw,          __NR_ioctl
raw_syscall_easy g_close_raw,          __NR_close
raw_syscall_easy g_chdir_raw,          __NR_chdir
raw_syscall_easy g_mkdir_raw,          __NR_mkdir
raw_syscall_easy g_futex_raw,          __NR_futex
raw_syscall_easy g_nanosleep_raw,      __NR_nanosleep
raw_syscall_easy g_readlink_raw,       __NR_readlink
raw_syscall_easy g_execve_raw,         __NR_execve
raw_syscall_easy g_clock_gettime_raw,  __NR_clock_gettime
raw_syscall_easy g_rt_sigprocmask_raw, __NR_rt_sigprocmask
raw_syscall_easy g_personality,        __NR_personality
raw_syscall_easy g_exit_group_raw,     __NR_exit_group
Commit	Line	Data
	1	@ vim:filetype=armasm
	2	#include <sys/syscall.h>
	3
	4	@ support ancient toolchains (gcc 2.95.3 has upto 225)
	5	#ifndef __NR_futex
	6	#define __NR_futex (__NR_SYSCALL_BASE+240)
	7	#endif
	8	#ifndef __NR_exit_group
	9	#define __NR_exit_group (__NR_SYSCALL_BASE+248)
	10	#endif
	11	#ifndef __NR_clock_gettime
	12	#define __NR_clock_gettime (__NR_SYSCALL_BASE+263)
	13	#endif
	14
	15	.global sys_cacheflush @ const void start_addr, const void end_addr
	16	sys_cacheflush:
	17	mov r2, #0
	18	#ifdef __ARM_EABI__
	19	/* EABI version */
	20	str r7, [sp, #-4]!
	21	mov r7, #(__ARM_NR_cacheflush & 0xff)
	22	#if (__ARM_NR_cacheflush & 0x00ff00)
	23	orr r7, r7, #(__ARM_NR_cacheflush & 0x00ff00)
	24	#endif
	25	#if (__ARM_NR_cacheflush & 0xff0000)
	26	orr r7, r7, #(__ARM_NR_cacheflush & 0xff0000)
	27	#endif
	28	swi 0
	29	ldr r7, [sp], #4
	30	#else
	31	/* OABI */
	32	swi __ARM_NR_cacheflush
	33	#endif
	34	bx lr
	35
	36
	37	#ifdef __ARM_EABI__
	38	#error hm?
	39	#endif
	40
	41	.global g_syscall
	42	g_syscall:
	43	mov r12, sp
	44	stmfd sp!, {r4, r5, r6}
	45	ldmia r12, {r4, r5, r6}
	46	swi __NR_syscall
	47	ldmfd sp!, {r4, r5, r6}
	48
	49	.global g_syscall_error
	50	g_syscall_error:
	51	cmn r0, #4096
	52	bxcc lr
	53	stmfd sp!, {r4, lr}
	54	rsb r4, r0, #0
	55	bl __errno_location
	56	str r4, [r0]
	57	mov r0, #-1
	58	ldmfd sp!, {r4, pc}
	59
	60	.global g_clone
	61	g_clone:
	62	ldr r12,[sp, #4] @ arg6 - convenience func ptr
	63	str r4, [sp, #-4]!
	64	ldr r4, [sp, #4] @ arg5
	65	swi __NR_clone
	66	tst r0, r0
	67	bxeq r12 @ child
	68	cmn r0, #4096
	69	ldr r4, [sp], #4
	70	bcs g_syscall_error
	71	bx lr
	72
	73	@ raw - no errno
	74	.macro raw_syscall_easy name nr
	75	.global \name
	76	\name:
	77	swi \nr
	78	bx lr
	79	.endm
	80
	81	.macro raw_syscall name nr
	82	.global \name
	83	\name:
	84	mov r12, sp
	85	stmfd sp!, {r4, r5, r6, lr}
	86	ldmia r12, {r4, r5, r6}
	87	swi \nr
	88	ldmfd sp!, {r4, r5, r6, pc}
	89	.endm
	90
	91	raw_syscall_easy g_open_raw, __NR_open
	92	raw_syscall_easy g_read_raw, __NR_read
	93	raw_syscall_easy g_write_raw, __NR_write
	94	raw_syscall g_mmap2_raw, __NR_mmap2
	95	raw_syscall_easy g_munmap_raw, __NR_munmap
	96	raw_syscall_easy g_ioctl_raw, __NR_ioctl
	97	raw_syscall_easy g_close_raw, __NR_close
	98	raw_syscall_easy g_chdir_raw, __NR_chdir
	99	raw_syscall_easy g_mkdir_raw, __NR_mkdir
	100	raw_syscall_easy g_futex_raw, __NR_futex
	101	raw_syscall_easy g_nanosleep_raw, __NR_nanosleep
	102	raw_syscall_easy g_readlink_raw, __NR_readlink
	103	raw_syscall_easy g_execve_raw, __NR_execve
	104	raw_syscall_easy g_clock_gettime_raw, __NR_clock_gettime
	105	raw_syscall_easy g_rt_sigprocmask_raw, __NR_rt_sigprocmask
	106	raw_syscall_easy g_personality, __NR_personality
	107	raw_syscall_easy g_exit_group_raw, __NR_exit_group