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- Log ----------------------------------------------------------------- commit 65c8575fc44b7ac0fd58e3bbfb0a31975eaa1d10 Author: Waldemar Brodkorb wbx@openadk.org Date: Sun Mar 8 10:59:07 2015 -0500

fix regression for ARM thumb mode

Sync with GNU libc, see here why r7 is not usable for thumb mode: https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/unix/sysv/linux/arm... Remove old OABI support.

Fixes build breakage for ARM noMMU builds. Still no runtime testing.

-----------------------------------------------------------------------

Summary of changes: libc/sysdeps/linux/arm/bits/syscalls.h | 56 ++++++++++----------------- libc/sysdeps/linux/common/sync_file_range.c | 3 ++ 2 files changed, 23 insertions(+), 36 deletions(-)

diff --git a/libc/sysdeps/linux/arm/bits/syscalls.h b/libc/sysdeps/linux/arm/bits/syscalls.h index 6b747d9..778cc34 100644 --- a/libc/sysdeps/linux/arm/bits/syscalls.h +++ b/libc/sysdeps/linux/arm/bits/syscalls.h @@ -43,41 +43,7 @@ }) \ )

-#if !defined(__thumb__) -#if defined(__ARM_EABI__) -#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \ -(__extension__ \ - ({unsigned int __internal_sys_result; \ - { \ - register int __a1 __asm__ ("r0"), _nr __asm__ ("r7"); \ - LOAD_ARGS_##nr (args) \ - _nr = (name); \ - __asm__ __volatile__ ("swi 0x0 @ syscall " #name \ - : "=r" (__a1) \ - : "r" (_nr) ASM_ARGS_##nr \ - : "memory"); \ - __internal_sys_result = __a1; \ - } \ - (int) __internal_sys_result; }) \ -) -#else /* defined(__ARM_EABI__) */ - -#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \ -(__extension__ \ - ({ unsigned int __internal_sys_result; \ - { \ - register int __a1 __asm__ ("a1"); \ - LOAD_ARGS_##nr (args) \ - __asm__ __volatile__ ("swi %1 @ syscall " #name \ - : "=r" (__a1) \ - : "i" (name) ASM_ARGS_##nr \ - : "memory"); \ - __internal_sys_result = __a1; \ - } \ - (int) __internal_sys_result; }) \ -) -#endif -#else /* !defined(__thumb__) */ +#if defined(__thumb__) /* We can't use push/pop inside the asm because that breaks unwinding (ie. thread cancellation). */ @@ -101,7 +67,23 @@ } \ (int) __internal_sys_result; }) \ ) -#endif /*!defined(__thumb__)*/ +#else /* ARM */ +#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \ +(__extension__ \ + ({unsigned int __internal_sys_result; \ + { \ + register int __a1 __asm__ ("r0"), _nr __asm__ ("r7"); \ + LOAD_ARGS_##nr (args) \ + _nr = (name); \ + __asm__ __volatile__ ("swi 0x0 @ syscall " #name \ + : "=r" (__a1) \ + : "r" (_nr) ASM_ARGS_##nr \ + : "memory"); \ + __internal_sys_result = __a1; \ + } \ + (int) __internal_sys_result; }) \ +) +#endif

#define INTERNAL_SYSCALL_ERROR_P(val, err) \ ((unsigned int) (val) >= 0xfffff001u) @@ -138,11 +120,13 @@ LOAD_ARGS_5 (a1, a2, a3, a4, a5) \ register int _v2 __asm__ ("v2") = _v2tmp; #define ASM_ARGS_6 ASM_ARGS_5, "r" (_v2) +#ifndef __thumb__ #define LOAD_ARGS_7(a1, a2, a3, a4, a5, a6, a7) \ int _v3tmp = (int) (a7); \ LOAD_ARGS_6 (a1, a2, a3, a4, a5, a6) \ register int _v3 __asm__ ("v3") = _v3tmp; #define ASM_ARGS_7 ASM_ARGS_6, "r" (_v3) +#endif

#endif /* __ASSEMBLER__ */ diff --git a/libc/sysdeps/linux/common/sync_file_range.c b/libc/sysdeps/linux/common/sync_file_range.c index db797de..52bc9d7 100644 --- a/libc/sysdeps/linux/common/sync_file_range.c +++ b/libc/sysdeps/linux/common/sync_file_range.c @@ -24,6 +24,9 @@ static int __NC(sync_file_range)(int fd, off64_t offset, off64_t nbytes, unsigne { # if defined __powerpc__ && __WORDSIZE == 64 return INLINE_SYSCALL(sync_file_range, 4, fd, flags, offset, nbytes); +# elif defined __arm__ && defined __thumb__ + return INLINE_SYSCALL(sync_file_range, 6, fd, + OFF64_HI_LO(offset), OFF64_HI_LO(nbytes), flags); # elif (defined __mips__ && _MIPS_SIM == _ABIO32) || \ (defined(__UCLIBC_SYSCALL_ALIGN_64BIT__) && !(defined(__powerpc__) || defined(__xtensa__))) /* arch with 64-bit data in even reg alignment #2: [arcv2/others-in-future]

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