diff options
Diffstat (limited to 'sysdeps/unix/alpha/sysdep.h')
| -rw-r--r-- | sysdeps/unix/alpha/sysdep.h | 50 |
1 files changed, 33 insertions, 17 deletions
diff --git a/sysdeps/unix/alpha/sysdep.h b/sysdeps/unix/alpha/sysdep.h index 6fed4a6adf..4b3f9aa5d8 100644 --- a/sysdeps/unix/alpha/sysdep.h +++ b/sysdeps/unix/alpha/sysdep.h @@ -58,25 +58,27 @@ Cambridge, MA 02139, USA. */ .frame sp, 0, ra #endif -/* Note that while it's better structurally, going back to set errno - can make things confusing if you're debugging---it looks like it's jumping - backwards into the previous fn. */ +/* Mark the end of function SYM. */ +#undef END +#define END(sym) .end sym + +/* Note that PSEUDO/PSEUDO_END use label number 1996---do not use a + label of that number between those two macros! */ + #ifdef __STDC__ #define PSEUDO(name, syscall_name, args) \ .globl name; \ .align 3; \ .ent name,0; \ \ -1: br gp, 2f; \ -2: ldgp gp, 0(gp); \ - jmp zero, syscall_error; \ - \ name##: \ - ldi v0, SYS_ify(syscall_name); \ + .frame sp, 0, ra \ + .prologue 1; /* yes, we do use gp */ \ + ldiq v0, SYS_ify(syscall_name); \ .set noat; \ call_pal PAL_callsys; \ .set at; \ - bne a3, 1b; \ + bne a3, 1996f; \ 3: #else #define PSEUDO(name, syscall_name, args) \ @@ -84,21 +86,35 @@ name##: \ .align 3; \ .ent name,0; \ \ -1: br gp, 2f; \ -2: ldgp gp, 0(gp); \ - jmp zero, syscall_error; \ - \ name/**/: \ - ldi v0, SYS_ify(syscall_name); \ + .frame sp, 0, ra \ + .prologue 1; /* yes, we do use gp */ \ + ldiq v0, SYS_ify(syscall_name); \ .set noat; \ call_pal PAL_callsys; \ .set at; \ - bne a3, 1b; \ + bne a3, 1996f; \ 3: #endif -#undef END -#define END(sym) .end sym +#undef PSEUDO_END + +#ifdef PIC +/* When building a shared library, we can use a branch since the text + section of the library is much smaller than 4MB. If we ever break + this assumption, the linker will tell us. */ +# define PSEUDO_END(sym) \ +1996: \ + br zero, __syscall_error; \ + END(sym) +#else +# define PSEUDO_END(sym) \ +1996: \ + br gp, 2f; \ +2: ldgp gp, 0(gp); \ + jmp zero, __syscall_error; \ + END(sym) +#endif #define r0 v0 #define r1 a4 |