| |
| This file records register use conventions and info for the 4 |
| supported platforms (since it is ABI dependent). This is so as to |
| avoid having to endlessly re-look up this info in ABI documents. |
| |
| ----------------------- |
| |
| x86-linux |
| ~~~~~~~~~ |
| |
| Reg Callee Arg |
| Name Saves? Reg? Comment Vex-uses? |
| -------------------------------------------------------------- |
| eax n n int[31:0] retreg y |
| ebx y n y |
| ecx n n y |
| edx n n int[63:32] retreg y |
| esi y n y |
| edi y n y |
| ebp y n & guest state |
| esp reserved n/a n/a |
| eflags n n/a y |
| st0 n ? n fp retreg y |
| st1-7 n ? n y |
| xmm0-7 n ? n y |
| |
| |
| amd64-linux |
| ~~~~~~~~~~~ |
| |
| Reg Callee Arg |
| Name Saves? Reg? Comment Vex-uses? |
| ------------------------------------------------------------------- |
| rax n n int[63:0] retreg |
| rbx y n y |
| rcx n int#4 |
| rdx n int#3 int[127:64] retreg |
| rsi n int#2 y |
| rdi n int#1 y |
| rbp y n & guest state |
| rsp reserved n/a n/a |
| r8 n int#5 y |
| r9 n int#6 y |
| r10 n ? |
| r11 n jmp temporary |
| r12-15 y y |
| eflags n n/a y |
| st0-7 n n long double retreg y |
| xmm0 n fp#1 fp retreg |
| xmm1 n fp#2 fp-high retreg |
| xmm2-7 n fp#3-8 y (3-7) |
| xmm8-15 n y (8-12) |
| |
| |
| ppc32-linux |
| ~~~~~~~~~~~ |
| |
| Reg Callee Arg |
| Name Saves? Reg? Comment Vex-uses? |
| ------------------------------------------------------------------- |
| r0 n n sometimes RAZ |
| r1 y n stack pointer |
| r2 n n |
| r3 n int#1 int[31:0] retreg y |
| r4 n int#2 also int retreg y |
| r5 n int#3 y |
| r6 n int#4 y |
| r7 n int#5 y |
| r8 n int#6 y |
| r9 n int#7 y |
| r10 n int#8 y |
| r11 n y |
| r12 n y |
| r13 ? |
| r14-28 y y |
| r29 y reserved for dispatcher |
| r30 y altivec spill temporary |
| r31 y & guest state |
| f0 n |
| f1 n fp#1 fp retreg |
| f2-8 n fp#2-8 |
| f9-13 n |
| f14-31 y y (14-21) |
| v0-v19 ? |
| v20-31 y y (20-27,29) |
| cr0-7 |
| lr y return address |
| ctr n |
| xer n |
| fpscr |
| |
| |
| ppc64-linux |
| ~~~~~~~~~~~ |
| TBD |
| |
| |
| ppc32-aix5 |
| ~~~~~~~~~~ |
| |
| Reg Callee Arg |
| Name Saves? Reg? Comment Vex-uses? |
| ------------------------------------------------------------------- |
| r0 n n sometimes RAZ |
| r1 y n stack pointer |
| r2 n n TOC pointer |
| r3 n int#1 int[31:0] retreg y |
| r4 n int#2 also int retreg y |
| r5 n int#3 y |
| r6 n int#4 y |
| r7 n int#5 y |
| r8 n int#6 y |
| r9 n int#7 y |
| r10 n int#8 y |
| r11 n "env pointer?!" y |
| r12 n "exn handling" y |
| r13 ? "reserved in 64-bit env" |
| r14-28 y y |
| r29 y reserved for dispatcher |
| r30 y altivec spill temporary |
| r31 y & guest state |
| f0 n |
| f1 n fp#1 fp retreg |
| f2-13 n fp#2-13 |
| f14-31 y y (14-21) |
| v0-v19 ? |
| v20-31 y y (20-27,29) |
| cr0-7 |
| lr y return address |
| ctr n |
| xer n |
| fpscr |