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| author | Kevin O'Connor <kevin@koconnor.net> | 2014-12-03 12:39:28 -0500 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2014-12-03 12:39:28 -0500 |
| commit | ff6d5519f2767b160d6f8e12f79d920dbf9872c6 (patch) | |
| tree | 633ae79fcb4a1baaf615a280d8ecb0c0cc249c15 /src/stacks.c | |
| parent | 56b252ea737c1514916d6df4493f89ff71322f60 (diff) | |
| download | seabios-ff6d5519f2767b160d6f8e12f79d920dbf9872c6.tar.gz | |
Use macros for .code16/32 mode switches in inline asm in stacks.c
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Diffstat (limited to 'src/stacks.c')
| -rw-r--r-- | src/stacks.c | 29 |
1 files changed, 17 insertions, 12 deletions
diff --git a/src/stacks.c b/src/stacks.c index 0c033d14..c6b7e8b5 100644 --- a/src/stacks.c +++ b/src/stacks.c @@ -63,6 +63,11 @@ call32_smm_post(void) inb(PORT_CMOS_DATA); } +#define ASM32_SWITCH16 " .code16\n" +#define ASM32_BACK32 " .code32\n" +#define ASM16_SWITCH32 " .code32\n" +#define ASM16_BACK16 " .code16gcc\n" + // Call a SeaBIOS C function in 32bit mode using smm trampoline static u32 call32_smm(void *func, u32 eax) @@ -85,8 +90,8 @@ call32_smm(void *func, u32 eax) " outb %%al, $" __stringify(PORT_SMI_CMD) "\n" " rep; nop\n" " hlt\n" - " .code32\n" + ASM16_SWITCH32 "1:movl %1, %%eax\n" " calll *%2\n" " movl %%eax, %1\n" @@ -99,7 +104,7 @@ call32_smm(void *func, u32 eax) " hlt\n" // Restore esp - " .code16gcc\n" + ASM16_BACK16 "2:movl %0, %%esp\n" : "=&r" (bkup_esp), "+r" (eax) : "r" (func) @@ -143,7 +148,7 @@ call16_smm(u32 eax, u32 edx, void *func) " rep; nop\n" " hlt\n" - " .code16\n" + ASM32_SWITCH16 "1:movl %1, %%eax\n" " movl %3, %%ecx\n" " calll _cfunc16_call16_smm_helper\n" @@ -157,7 +162,7 @@ call16_smm(u32 eax, u32 edx, void *func) " hlt\n" // Set esp to flat stack location - " .code32\n" + ASM32_BACK32 "2:addl %0, %%esp\n" : "+r" (stackoffset), "+r" (eax), "+d" (edx) : "r" (func) @@ -232,13 +237,13 @@ call32_sloppy(void *func, u32 eax) // Transition to 32bit mode, call func, return to 16bit " movl $(" __stringify(BUILD_BIOS_ADDR) " + 1f), %%edx\n" " jmp transition32\n" - " .code32\n" + ASM16_SWITCH32 "1:calll *%3\n" " movl $2f, %%edx\n" " jmp transition16big\n" // Restore ds/ss/esp - " .code16gcc\n" + ASM16_BACK16 "2:movl %0, %%ds\n" " movl %0, %%ss\n" " movl %1, %%esp\n" @@ -273,7 +278,7 @@ call16_sloppy(u32 eax, u32 edx, void *func) " movl $(1f - " __stringify(BUILD_BIOS_ADDR) "), %%edx\n" " jmp transition16big\n" // Setup ss/esp and call func - " .code16\n" + ASM32_SWITCH16 "1:movl %3, %%ecx\n" " shll $4, %3\n" " movw %%cx, %%ss\n" @@ -285,7 +290,7 @@ call16_sloppy(u32 eax, u32 edx, void *func) // Return to 32bit and restore esp " movl $2f, %%edx\n" " jmp transition32\n" - " .code32\n" + ASM32_BACK32 "2:addl %3, %%esp\n" : "+a" (eax) : "r" (func), "r" (edx), "r" (stackseg) @@ -320,13 +325,13 @@ call16(u32 eax, u32 edx, void *func) " movl $(1f - " __stringify(BUILD_BIOS_ADDR) "), %%edx\n" " jmp transition16\n" // Call func - " .code16\n" + ASM32_SWITCH16 "1:movl %2, %%edx\n" " calll *%1\n" // Return to 32bit " movl $2f, %%edx\n" " jmp transition32\n" - " .code32\n" + ASM32_BACK32 "2:\n" : "+a" (eax) : "r" (func), "r" (edx) @@ -347,13 +352,13 @@ call16big(u32 eax, u32 edx, void *func) " movl $(1f - " __stringify(BUILD_BIOS_ADDR) "), %%edx\n" " jmp transition16big\n" // Call func - " .code16\n" + ASM32_SWITCH16 "1:movl %2, %%edx\n" " calll *%1\n" // Return to 32bit " movl $2f, %%edx\n" " jmp transition32\n" - " .code32\n" + ASM32_BACK32 "2:\n" : "+a" (eax) : "r" (func), "r" (edx) |