diff options
| author | Alexandre Oliva <aoliva@redhat.com> | 2004-01-06 22:21:35 +0300 |
|---|---|---|
| committer | Alexandre Oliva <aoliva@redhat.com> | 2004-01-06 22:21:35 +0300 |
| commit | db040b1759feca8d74e08de660d9796572526892 (patch) | |
| tree | ef1864133503f39b412fc5a6295659d8360c7da8 /libgloss/frv | |
| parent | 327a2cf95ee9f80be7ea4014cdecff6e2ae3422b (diff) | |
2003-12-02 Richard Sandiford <rsandifo@redhat.com>
* frv/crt0.S (_start): Fix use of FDPIC conditionals. Move the set of
gr11 outside the FDPIC conditional. Avoid clobbering gr4 too early.
2003-11-14 Richard Sandiford <rsandifo@redhat.com>
* frv/crt0.S: Fix fdpic sp calculation.
2003-11-05 Alexandre Oliva <aoliva@redhat.com>
* frv/crt0.S: Use __stacksize, not __stack, to initialize sp on
FDPIC. Update comments on computing _GLOBAL_OFFSET_TABLE_. Don't
fixup ctors nor dtors on FDPIC.
2003-09-19 Alexandre Oliva <aoliva@redhat.com>
* frv/crt0.S (_start): Set up gr15 only for FDPIC.
* frv/crt0.S (_start): Save _GLOBAL_OFFSET_TABLE_ in gr17, and set
gr15 before function calls.
2003-09-19 DJ Delorie <dj@redhat.com>, Alexandre Oliva <aoliva@redhat.com>
* frv/crt0.S (_start): Set up gr15 with _GLOBAL_OFFSET_TABLE_'s
value.
Diffstat (limited to 'libgloss/frv')
| -rw-r--r-- | libgloss/frv/crt0.S | 43 |
1 files changed, 41 insertions, 2 deletions
diff --git a/libgloss/frv/crt0.S b/libgloss/frv/crt0.S index 0825a5efc..1a906d8a5 100644 --- a/libgloss/frv/crt0.S +++ b/libgloss/frv/crt0.S @@ -1,6 +1,6 @@ /* crt0.S -- startup file for frv. * - * Copyright (c) 2002 Red Hat, Inc + * Copyright (c) 2002, 2003 Red Hat, Inc * * The authors hereby grant permission to use, copy, modify, distribute, * and license this software and its documentation for any purpose, provided @@ -36,11 +36,41 @@ _start: setlo #gprello(.Lcall), gr5 P(sub) gr4, gr5, gr16 +#if ! __FRV_FDPIC__ sethi #gprelhi(EXT(_stack)), sp /* load up stack pointer */ P(setlo) #gprello(EXT(_stack)), sp setlos #0, fp /* zero fp to allow unwinders to stop */ P(add) sp, gr16, sp +#define FDPIC(...) +#else +#define FDPIC(...) __VA_ARGS__ + + /* The assembler will rightfully claim that + #hi/lo(__stacksize) are unsafe for PIC, but since __stacksize + is absolute, and we don't want it to be relocated, we should + be fine. */ + + sethi #gprelhi(EXT(__end)), gr6 + P(sethi) #hi(EXT(__stacksize+7)), gr5 + setlo #gprello(EXT(__end)), gr6 + P(setlo) #lo(EXT(__stacksize+7)), gr5 + add gr6, gr16, gr6 + add gr6, gr5, gr5 + andi gr5, -8, sp + + /* Using GPREL to compute _GLOBAL_OFFSET_TABLE_'s will force + the entire program to relocate as a unit, which is fine for + frv-elf. */ + + P(sethi) #gprelhi(EXT(_GLOBAL_OFFSET_TABLE_)), gr15 + setlo #gprello(EXT(_GLOBAL_OFFSET_TABLE_)), gr15 + /* We compute the value in a call-saved register (that happens + to be the PIC register in the EABI, and copy it to gr15 before + every call. */ + add gr15, gr16, gr17 +#endif + sethi #gprelhi(EXT(__start_cmp)), gr5 setlo #gprello(EXT(__start_cmp)), gr5 ld @(gr5,gr16), gr6 @@ -48,6 +78,9 @@ _start: beq icc0, 0, .Lfixed P(st) gr4, @(gr5, gr16) /* update so if we restart no need to fixup */ + setlos 4, gr11 + +#if ! __FRV_FDPIC__ /* fixup the .ctors list */ sethi #gprelhi(EXT(__CTOR_LIST__)), gr9 @@ -58,7 +91,6 @@ _start: P(add) gr10, gr16, gr10 addi gr9, 4, gr9 P(subi) gr10, 4, gr10 - setlos 4, gr11 call EXT(__frv_fixptrs) /* fixup the .dtors list */ @@ -71,6 +103,7 @@ _start: P(addi) gr9, 4, gr9 subi gr10, 4, gr10 call EXT(__frv_fixptrs) +#endif /* ! __FRV_FDPIC__ */ /* fixup the .dtors list */ P(sethi) #gprelhi(EXT(__ROFIXUP_LIST__)), gr9 @@ -79,6 +112,7 @@ _start: setlo #gprello(EXT(__ROFIXUP_END__)), gr10 P(add) gr9, gr16, gr9 add gr10, gr16, gr10 + FDPIC(mov gr17, gr15) call EXT(__frv_fix_usrptrs) .Lfixed: @@ -166,17 +200,21 @@ _start: add gr4, gr16, gr4 P(setlos) #0, gr9 sub gr4, gr8, gr10 + FDPIC(mov gr17, gr15) call EXT(memset) P(setlos) #0, gr8 /* zero argc, argv, envp */ setlos #0, gr9 P(setlos) #0, gr10 + FDPIC(mov gr17, gr15) call EXT(main) + FDPIC(mov gr17, gr15) call EXT(exit) .Lend: .size __start,(.Lend-__start) +#if ! __FRV_FDPIC__ /* Routine to adjust pointers gr8 = difference to adjust by gr9 = starting address @@ -199,6 +237,7 @@ EXT(__frv_fixptrs): .Lret2: ret .Lend2: .size EXT(__frv_fixptrs),.Lend2-EXT(__frv_fixptrs) +#endif /* ! __FRV_FDPIC__ */ /* Routine to adjust statically initialized pointers Note since these are pointers to pointers, they |