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Fix stack frame layout.

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f8-f15 are callee-saved (not f0,f2,f4 and f6). There isn't space
for them in the caller's stack frame so we need to increase the
size of the interpreter's stack frame.
This commit is contained in:
Michael Munday 2016-11-23 17:30:10 -05:00
parent 5a69b4638a
commit dbf789536c
2 changed files with 40 additions and 27 deletions
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10
src/lj_frame.h
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@ -265,13 +265,13 @@ enum { LJ_CONT_TAILCALL, LJ_CONT_FFI_CALLBACK }; /* Special continuations. */
#define CFRAME_OFS_MULTRES 0
#define CFRAME_SHIFT_MULTRES 3
#elif LJ_TARGET_S390X
#define CFRAME_OFS_ERRF 216
#define CFRAME_OFS_NRES 208
#define CFRAME_OFS_PREV 200
#define CFRAME_OFS_L 192
#define CFRAME_OFS_ERRF 280
#define CFRAME_OFS_NRES 272
#define CFRAME_OFS_PREV 264
#define CFRAME_OFS_L 256
#define CFRAME_OFS_PC 168
#define CFRAME_OFS_MULTRES 160
#define CFRAME_SIZE 172
#define CFRAME_SIZE 240
#define CFRAME_SHIFT_MULTRES 3
#else
#error "Missing CFRAME_* definitions for this architecture"

57
src/vm_s390x.dasc
View File

@ -58,22 +58,28 @@
|.define SP, r15
|
|// Stack layout while in interpreter. Must match with lj_frame.h.
|.define CFRAME_SPACE, 176 // Delta for SP, 8 byte aligned.
|.define CFRAME_SPACE, 240 // Delta for SP, 8 byte aligned.
|
|// Register save area.
|.define SAVE_FPR6, 328(SP)
|.define SAVE_FPR4, 320(SP)
|.define SAVE_FPR2, 312(SP)
|.define SAVE_FPR0, 304(SP)
|.define SAVE_GPRS, 224(SP) // Save area for r6-r15 (10*8 bytes).
|.define SAVE_GPRS, 288(SP) // Save area for r6-r15 (10*8 bytes).
|
|// Argument save area, each slot is 8-bytes (32-bit types are sign/zero extended).
|.define SAVE_ERRF, 216(SP) // Argument 4, in r5.
|.define SAVE_NRES, 208(SP) // Argument 3, in r4.
|.define SAVE_CFRAME, 200(SP) // Argument 2, in r3.
|.define SAVE_L, 192(SP) // Argument 1, in r2.
|.define RESERVED, 184(SP) // Reserved for compiler use.
|.define BACKCHAIN, 176(SP) // <- SP entering interpreter.
|.define SAVE_ERRF, 280(SP) // Argument 4, in r5.
|.define SAVE_NRES, 272(SP) // Argument 3, in r4.
|.define SAVE_CFRAME, 264(SP) // Argument 2, in r3.
|.define SAVE_L, 256(SP) // Argument 1, in r2.
|.define RESERVED, 248(SP) // Reserved for compiler use.
|.define BACKCHAIN, 240(SP) // <- SP entering interpreter.
|
|// Interpreter stack frame.
|.define SAVE_FPR15, 232(SP)
|.define SAVE_FPR14, 224(SP)
|.define SAVE_FPR13, 216(SP)
|.define SAVE_FPR12, 208(SP)
|.define SAVE_FPR11, 200(SP)
|.define SAVE_FPR10, 192(SP)
|.define SAVE_FPR9, 184(SP)
|.define SAVE_FPR8, 176(SP)
|.define SAVE_PC, 168(SP)
|.define SAVE_MULTRES, 160(SP)
|
@ -83,19 +89,26 @@
|.macro saveregs
| lay SP, -CFRAME_SPACE(SP) // Allocate stack frame.
| stmg r6, r15, SAVE_GPRS // Technically we restore r15 regardless.
| std f0, SAVE_FPR0
| std f2, SAVE_FPR2
| std f4, SAVE_FPR4
| std f6, SAVE_FPR6
| std f8, SAVE_FPR8 // f8-f15 are callee-saved.
| std f9, SAVE_FPR9
| std f10, SAVE_FPR10
| std f11, SAVE_FPR11
| std f12, SAVE_FPR12
| std f13, SAVE_FPR13
| std f14, SAVE_FPR14
| std f15, SAVE_FPR15
|.endmacro
|
|.macro restoreregs
| la SP, CFRAME_SPACE(SP) // De-allocate stack frame.
| lmg r6, r15, SAVE_GPRS // Technically we restore r15 regardless.
| ld f0, SAVE_FPR0
| ld f2, SAVE_FPR2
| ld f4, SAVE_FPR4
| ld f6, SAVE_FPR6
| ld f8, SAVE_FPR8 // f8-f15 are callee-saved.
| ld f9, SAVE_FPR9
| ld f10, SAVE_FPR10
| ld f11, SAVE_FPR11
| ld f12, SAVE_FPR12
| ld f13, SAVE_FPR13
| ld f14, SAVE_FPR14
| ld f15, SAVE_FPR15
| lmg r6, r15, SAVE_GPRS // Restores the stack pointer.
|// br r14 to return?
|.endmacro
|