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| author | Richard Henderson <rth@twiddle.net> | 2013-02-14 21:00:14 -0800 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2013-03-06 07:46:45 -0800 |
| commit | 55668624cf2c1c70ff67d8160f021df1f50fab0e (patch) | |
| tree | 8c8090e169aa1eb36f4dd3ab11f65d0a0790a5d4 /ports/sysdeps/unix/sysv/linux/arm/sysdep.h | |
| parent | 5ff5dfe748c0585bb43e9d16fea9d89dc3bf2b9b (diff) | |
| download | glibc-55668624cf2c1c70ff67d8160f021df1f50fab0e.tar.gz | |
arm: Use push/pop mnemonics
For arm this makes no difference--the result is bit-for-bit identical;
for thumb this results in smaller encodings. Perhaps it ought not and
this is in fact an assembler bug, but I also think it's clearer.
Diffstat (limited to 'ports/sysdeps/unix/sysv/linux/arm/sysdep.h')
| -rw-r--r-- | ports/sysdeps/unix/sysv/linux/arm/sysdep.h | 27 |
1 files changed, 13 insertions, 14 deletions
diff --git a/ports/sysdeps/unix/sysv/linux/arm/sysdep.h b/ports/sysdeps/unix/sysv/linux/arm/sysdep.h index dc2058b275..f2ab5f589f 100644 --- a/ports/sysdeps/unix/sysv/linux/arm/sysdep.h +++ b/ports/sysdeps/unix/sysv/linux/arm/sysdep.h @@ -147,23 +147,22 @@ __local_syscall_error: \ # else # if defined(__ARM_ARCH_4T__) && defined(__THUMB_INTERWORK__) # define POP_PC \ - ldr lr, [sp], #4; \ + pop { lr }; \ cfi_adjust_cfa_offset (-4); \ cfi_restore (lr); \ bx lr # else -# define POP_PC \ - ldr pc, [sp], #4 +# define POP_PC pop { pc } # endif # define SYSCALL_ERROR_HANDLER \ __local_syscall_error: \ - str lr, [sp, #-4]!; \ + push { lr }; \ cfi_adjust_cfa_offset (4); \ cfi_rel_offset (lr, 0); \ - str r0, [sp, #-4]!; \ + push { r0 }; \ cfi_adjust_cfa_offset (4); \ bl PLTJMP(C_SYMBOL_NAME(__errno_location)); \ - ldr r1, [sp], #4; \ + pop { r1 }; \ cfi_adjust_cfa_offset (-4); \ rsb r1, r1, #0; \ str r1, [r0]; \ @@ -230,7 +229,7 @@ __local_syscall_error: \ #undef DOARGS_0 #define DOARGS_0 \ .fnstart; \ - str r7, [sp, #-4]!; \ + push { r7 }; \ cfi_adjust_cfa_offset (4); \ cfi_rel_offset (r7, 0); \ .save { r7 } @@ -245,7 +244,7 @@ __local_syscall_error: \ #undef DOARGS_5 #define DOARGS_5 \ .fnstart; \ - stmfd sp!, {r4, r7}; \ + push {r4, r7}; \ cfi_adjust_cfa_offset (8); \ cfi_rel_offset (r4, 0); \ cfi_rel_offset (r7, 4); \ @@ -255,7 +254,7 @@ __local_syscall_error: \ #define DOARGS_6 \ .fnstart; \ mov ip, sp; \ - stmfd sp!, {r4, r5, r7}; \ + push {r4, r5, r7}; \ cfi_adjust_cfa_offset (12); \ cfi_rel_offset (r4, 0); \ cfi_rel_offset (r5, 4); \ @@ -266,7 +265,7 @@ __local_syscall_error: \ #define DOARGS_7 \ .fnstart; \ mov ip, sp; \ - stmfd sp!, {r4, r5, r6, r7}; \ + push {r4, r5, r6, r7}; \ cfi_adjust_cfa_offset (16); \ cfi_rel_offset (r4, 0); \ cfi_rel_offset (r5, 4); \ @@ -277,7 +276,7 @@ __local_syscall_error: \ #undef UNDOARGS_0 #define UNDOARGS_0 \ - ldr r7, [sp], #4; \ + pop {r7}; \ cfi_adjust_cfa_offset (-4); \ cfi_restore (r7); \ .fnend @@ -291,14 +290,14 @@ __local_syscall_error: \ #define UNDOARGS_4 UNDOARGS_0 #undef UNDOARGS_5 #define UNDOARGS_5 \ - ldmfd sp!, {r4, r7}; \ + pop {r4, r7}; \ cfi_adjust_cfa_offset (-8); \ cfi_restore (r4); \ cfi_restore (r7); \ .fnend #undef UNDOARGS_6 #define UNDOARGS_6 \ - ldmfd sp!, {r4, r5, r7}; \ + pop {r4, r5, r7}; \ cfi_adjust_cfa_offset (-12); \ cfi_restore (r4); \ cfi_restore (r5); \ @@ -306,7 +305,7 @@ __local_syscall_error: \ .fnend #undef UNDOARGS_7 #define UNDOARGS_7 \ - ldmfd sp!, {r4, r5, r6, r7}; \ + pop {r4, r5, r6, r7}; \ cfi_adjust_cfa_offset (-16); \ cfi_restore (r4); \ cfi_restore (r5); \ |