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Diffstat (limited to 'libc/sysdeps/linux/arm/bits/syscalls.h')
-rw-r--r--libc/sysdeps/linux/arm/bits/syscalls.h69
1 files changed, 44 insertions, 25 deletions
diff --git a/libc/sysdeps/linux/arm/bits/syscalls.h b/libc/sysdeps/linux/arm/bits/syscalls.h
index 64c625f6d..2da150624 100644
--- a/libc/sysdeps/linux/arm/bits/syscalls.h
+++ b/libc/sysdeps/linux/arm/bits/syscalls.h
@@ -4,22 +4,15 @@
# error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead."
#endif
-/* This includes the `__NR_<name>' syscall numbers taken from the Linux kernel
- * header files. It also defines the traditional `SYS_<name>' macros for older
- * programs. */
-#include <bits/sysnum.h>
-
/*
Some of the sneaky macros in the code were taken from
glibc-2.3.2/sysdeps/unix/sysv/linux/arm/sysdep.h
*/
-#ifndef __ASSEMBLER__
-
-#include <errno.h>
-
#define SYS_ify(syscall_name) (__NR_##syscall_name)
+#ifdef __ASSEMBLER__
+
/* Call a given syscall, with arguments loaded. For EABI, we must
save and restore r7 for the syscall number. Unlike the DO_CALL
macro in glibc, this macro does not load syscall arguments. */
@@ -34,8 +27,11 @@
#define DO_CALL(syscall_name) \
swi SYS_ify (syscall_name);
#endif
+
#else
+#include <errno.h>
+
#undef _syscall0
#define _syscall0(type,name) \
type name(void) \
@@ -111,27 +107,50 @@ return (type) (INLINE_SYSCALL(name, 7, arg1, arg2, arg3, arg4, arg5, arg6, arg7)
#undef INTERNAL_SYSCALL
#if defined(__ARM_EABI__)
+#if !defined(__thumb__)
#define INTERNAL_SYSCALL(name, err, nr, args...) \
({unsigned int _sys_result; \
{ \
- register int _a1 asm ("r0"), _nr asm ("r7"); \
+ register int _a1 __asm__ ("r0"), _nr __asm__ ("r7"); \
LOAD_ARGS_##nr (args) \
_nr = SYS_ify(name); \
- asm volatile ("swi 0x0 @ syscall " #name \
+ __asm__ volatile ("swi 0x0 @ syscall " #name \
: "=r" (_a1) \
: "r" (_nr) ASM_ARGS_##nr \
: "memory"); \
_sys_result = _a1; \
} \
(int) _sys_result; })
+#else /* !defined(__thumb__) */
+/* So hide the use of r7 from the compiler, this would be a lot
+ * easier but for the fact that the syscalls can exceed 255.
+ * For the moment the LOAD_ARG_7 is sacrificed.
+ */
+#define INTERNAL_SYSCALL(name, err, nr, args...) \
+ ({ unsigned int _sys_result; \
+ { \
+ register int _a1 asm ("a1"); \
+ LOAD_ARGS_##nr (args) \
+ register int _v3 asm ("v3") = (int) (SYS_ify(name)); \
+ asm volatile ("push {r7}\n" \
+ "\tmov r7, v3\n" \
+ "\tswi 0 @ syscall " #name "\n" \
+ "\tpop {r7}" \
+ : "=r" (_a1) \
+ : "r" (_v3) ASM_ARGS_##nr \
+ : "memory"); \
+ _sys_result = _a1; \
+ } \
+ (int) _sys_result; })
+#endif /*!defined(__thumb__)*/
#else /* !defined(__ARM_EABI__) */
#if !defined(__thumb__)
#define INTERNAL_SYSCALL(name, err, nr, args...) \
({ unsigned int _sys_result; \
{ \
- register int _a1 asm ("a1"); \
+ register int _a1 __asm__ ("a1"); \
LOAD_ARGS_##nr (args) \
- asm volatile ("swi %1 @ syscall " #name \
+ __asm__ volatile ("swi %1 @ syscall " #name \
: "=r" (_a1) \
: "i" (SYS_ify(name)) ASM_ARGS_##nr \
: "memory"); \
@@ -147,10 +166,10 @@ return (type) (INLINE_SYSCALL(name, 7, arg1, arg2, arg3, arg4, arg5, arg6, arg7)
#define INTERNAL_SYSCALL(name, err, nr, args...) \
({ unsigned int _sys_result; \
{ \
- register int _a1 asm ("a1"); \
+ register int _a1 __asm__ ("a1"); \
LOAD_ARGS_##nr (args) \
- register int _r7 asm ("r7") = (int) (SYS_ify(name)); \
- asm volatile ("swi 0 @ syscall " #name \
+ register int _r7 __asm__ ("r7") = (int) (SYS_ify(name)); \
+ __asm__ volatile ("swi 0 @ syscall " #name \
: "=r" (_a1) \
: "r" (_r7) ASM_ARGS_##nr \
: "memory"); \
@@ -165,10 +184,10 @@ return (type) (INLINE_SYSCALL(name, 7, arg1, arg2, arg3, arg4, arg5, arg6, arg7)
#define INTERNAL_SYSCALL(name, err, nr, args...) \
({ unsigned int _sys_result; \
{ \
- register int _a1 asm ("a1"); \
+ register int _a1 __asm__ ("a1"); \
LOAD_ARGS_##nr (args) \
- register int _v3 asm ("v3") = (int) (SYS_ify(name)); \
- asm volatile ("push {r7}\n" \
+ register int _v3 __asm__ ("v3") = (int) (SYS_ify(name)); \
+ __asm__ volatile ("push {r7}\n" \
"\tmov r7, v3\n" \
"\tswi 0 @ syscall " #name "\n" \
"\tpop {r7}" \
@@ -196,27 +215,27 @@ return (type) (INLINE_SYSCALL(name, 7, arg1, arg2, arg3, arg4, arg5, arg6, arg7)
LOAD_ARGS_0 ()
#define ASM_ARGS_1 ASM_ARGS_0, "r" (_a1)
#define LOAD_ARGS_2(a1, a2) \
- register int _a2 asm ("a2") = (int) (a2); \
+ register int _a2 __asm__ ("a2") = (int) (a2); \
LOAD_ARGS_1 (a1)
#define ASM_ARGS_2 ASM_ARGS_1, "r" (_a2)
#define LOAD_ARGS_3(a1, a2, a3) \
- register int _a3 asm ("a3") = (int) (a3); \
+ register int _a3 __asm__ ("a3") = (int) (a3); \
LOAD_ARGS_2 (a1, a2)
#define ASM_ARGS_3 ASM_ARGS_2, "r" (_a3)
#define LOAD_ARGS_4(a1, a2, a3, a4) \
- register int _a4 asm ("a4") = (int) (a4); \
+ register int _a4 __asm__ ("a4") = (int) (a4); \
LOAD_ARGS_3 (a1, a2, a3)
#define ASM_ARGS_4 ASM_ARGS_3, "r" (_a4)
#define LOAD_ARGS_5(a1, a2, a3, a4, a5) \
- register int _v1 asm ("v1") = (int) (a5); \
+ register int _v1 __asm__ ("v1") = (int) (a5); \
LOAD_ARGS_4 (a1, a2, a3, a4)
#define ASM_ARGS_5 ASM_ARGS_4, "r" (_v1)
#define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6) \
- register int _v2 asm ("v2") = (int) (a6); \
+ register int _v2 __asm__ ("v2") = (int) (a6); \
LOAD_ARGS_5 (a1, a2, a3, a4, a5)
#define ASM_ARGS_6 ASM_ARGS_5, "r" (_v2)
#define LOAD_ARGS_7(a1, a2, a3, a4, a5, a6, a7) \
- register int _v3 asm ("v3") = (int) (a7); \
+ register int _v3 __asm__ ("v3") = (int) (a7); \
LOAD_ARGS_6 (a1, a2, a3, a4, a5, a6)
#define ASM_ARGS_7 ASM_ARGS_6, "r" (_v3)
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-01 12:20:16 +0000